{"id":655,"date":"2024-03-07T03:24:53","date_gmt":"2024-03-07T03:24:53","guid":{"rendered":"https:\/\/lmmworkrolls.com\/?p=655"},"modified":"2024-03-08T05:21:21","modified_gmt":"2024-03-08T05:21:21","slug":"1780-phan-tich-nguyen-nhan-va-bien-phap-phong-ngua-hien-tuong-bong-troc-lo-du-phong-trong-qua-trinh-can-nong-lien-tuc","status":"publish","type":"post","link":"https:\/\/lmmworkrolls.com\/vi\/1780-phan-tich-nguyen-nhan-va-bien-phap-phong-ngua-hien-tuong-bong-troc-lo-du-phong-trong-qua-trinh-can-nong-lien-tuc\/","title":{"rendered":"1780 Ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n v\u00e0 bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba cho s\u1ef1 bong tr\u00f3c c\u1ee7a c\u00e1c l\u00f4 d\u1ef1 ph\u00f2ng trong qu\u00e1 tr\u00ecnh c\u00e1n n\u00f3ng li\u00ean t\u1ee5c"},"content":{"rendered":"

T\u00f3m t\u1eaft: Ph\u00e2n t\u00edch qu\u00e1 tr\u00ecnh bong tr\u00f3c v\u00e0 m\u1ebb c\u1ee7a <\/strong>cu\u1ed9n d\u1ef1 ph\u00f2ng<\/strong>s \u1edf c\u00e1c c\u1ea1nh c\u1ee7a <\/strong>cu\u1ed9n d\u1ef1 ph\u00f2ng<\/strong>s c\u1ee7a m\u00e1y phay th\u00f4 n\u00f3ng song song Angang n\u0103m 1780 \u0111\u00e3 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh. Ng\u01b0\u1eddi ta tin r\u1eb1ng s\u1ef1 c\u1ee9ng h\u00f3a khi l\u00e0m vi\u1ec7c, s\u1ef1 m\u00e0i m\u00f2n kh\u00f4ng \u0111\u1ec1u, c\u00e1c v\u1ebft n\u1ee9t nh\u1ecf do m\u1ecfi v\u00e0 thi\u1ebft k\u1ebf v\u00e1t m\u00e9p b\u00ean c\u1ee7a con l\u0103n kh\u00f4ng h\u1ee3p l\u00fd l\u00e0 nh\u1eefng l\u00fd do ch\u00ednh g\u00e2y ra t\u00ecnh tr\u1ea1ng bong tr\u00f3c c\u1ee7a con l\u0103n. D\u1ef1a tr\u00ean c\u00e1c \u0111i\u1ec1u ki\u1ec7n s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p s\u1eed d\u1ee5ng v\u00e0 b\u1ea3o d\u01b0\u1ee1ng h\u1ee3p l\u00fd v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t.<\/strong><\/strong><\/p>\n\n\n\n

T\u1eeb kh\u00f3a: c\u00e1n n\u00f3ng; cu\u1ed9n d\u1ef1 ph\u00f2ng<\/a>; bong tr\u00f3c; v\u1ebft n\u1ee9t nh\u1ecf do m\u1ecfi<\/strong><\/p>\n\n\n\n

Gi\u1edbi thi\u1ec7u<\/strong><\/h2>\n\n\n\n

Trong b\u1ed1n cao m\u00e1y c\u00e1n<\/a> \u0110\u1ed1i v\u1edbi s\u1ea3n xu\u1ea5t th\u00e9p t\u1ea5m v\u00e0 th\u00e9p d\u1ea3i, c\u00e1c l\u00f4 l\u00e0m vi\u1ec7c ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u1edbi ph\u00f4i c\u00e1n, g\u00e2y ra bi\u1ebfn d\u1ea1ng d\u1ebbo c\u1ee7a ph\u00f4i c\u00e1n, li\u00ean quan ch\u1eb7t ch\u1ebd \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t v\u00e0 h\u00ecnh d\u1ea1ng c\u1ee7a ph\u00f4i t\u1ea5m v\u00e0 th\u00e9p d\u1ea3i. L\u00f4 d\u1ef1 ph\u00f2ng ch\u1ecbu h\u1ea7u h\u1ebft m\u00f4 men u\u1ed1n, \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng s\u1ea3n xu\u1ea5t \u1ed5n \u0111\u1ecbnh, \u0111\u1eb7c bi\u1ec7t l\u00e0 h\u00ecnh d\u1ea1ng m\u1eb7t c\u1eaft ngang c\u1ee7a ph\u00f4i t\u1ea5m v\u00e0 th\u00e9p d\u1ea3i. cu\u1ed9n d\u1ef1 ph\u00f2ng<\/a>\u00a0\u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ea3n xu\u1ea5t. M\u1ed9t m\u1eb7t, chu k\u1ef3 thay th\u1ebf c\u1ee7a l\u00f4 d\u1ef1 ph\u00f2ng t\u01b0\u01a1ng \u0111\u1ed1i d\u00e0i, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi x\u1ea3y ra tai n\u1ea1n, \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn d\u00e2y chuy\u1ec1n c\u00e1n; m\u1eb7t kh\u00e1c, chi ph\u00ed s\u1ea3n xu\u1ea5t l\u00f4 d\u1ef1 ph\u00f2ng cao. M\u1ed7i l\u00f4 c\u00f3 th\u1ec3 t\u1ed1n h\u01a1n m\u1ed9t tri\u1ec7u nh\u00e2n d\u00e2n t\u1ec7. Khi x\u1ea3y ra tai n\u1ea1n l\u00f4 d\u1ef1 ph\u00f2ng, \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a l\u00f4 \u0111\u1ee1 b\u1ecb m\u1ea5t, g\u00e2y ra t\u1ed5n th\u1ea5t kinh t\u1ebf l\u1edbn. Ngay sau khi ho\u1ea1t \u0111\u1ed9ng c\u00e1n n\u00f3ng li\u00ean t\u1ee5c n\u0103m 1780 c\u1ee7a C\u00f4ng ty TNHH S\u1eaft th\u00e9p An D\u01b0\u01a1ng \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o ho\u1ea1t \u0111\u1ed9ng, m\u1ed9t v\u1ee5 tai n\u1ea1n nghi\u00eam tr\u1ecdng \u0111\u00e3 x\u1ea3y ra trong \u0111\u00f3 \u0111\u1ea7u l\u00f4 \u0111\u1ee1 c\u1ee7a m\u00e1y c\u00e1n th\u00f4 b\u1ecb r\u01a1i ra. B\u00e0i vi\u1ebft n\u00e0y ph\u00e2n t\u00edch l\u00fd do t\u1ea1i sao l\u00f4 \u0111\u1ee1 b\u1ecb bong ra v\u00e0 k\u1eb9t, v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c bi\u1ec7n ph\u00e1p c\u1ea3i thi\u1ec7n v\u00e0 ph\u00f2ng ng\u1eeba t\u01b0\u01a1ng \u1ee9ng theo c\u00e1ch c\u00f3 m\u1ee5c ti\u00eau.<\/p>\n\n\n\n

T\u00ecnh h\u00ecnh c\u01a1 b\u1ea3n c\u1ee7a c\u00e1n n\u00f3ng li\u00ean t\u1ee5c n\u0103m 1780<\/strong><\/h2>\n\n\n\n

D\u00e2y chuy\u1ec1n c\u00e1n n\u00f3ng li\u00ean t\u1ee5c 1780 l\u00e0 m\u1ed9t trong nh\u1eefng d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t quan tr\u1ecdng trong k\u1ebf ho\u1ea1ch chi\u1ebfn l\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh c\u01a1 c\u1ea5u s\u1ea3n ph\u1ea9m c\u1ee7a Anyang Iron and Steel. Trong giai \u0111o\u1ea1n \u0111\u1ea7u ti\u00ean, 2 l\u00f2 nung d\u1ea7m di \u0111\u1ed9ng, 1 m\u00e1y c\u00e1n th\u00f4 \u0111\u1ea3o ng\u01b0\u1ee3c b\u1ed1n cao v\u1edbi c\u00e1c con l\u0103n \u0111\u1ee9ng, 1 m\u00e1y c\u1eaft bay, 7 m\u00e1y c\u00e1n ho\u00e0n thi\u1ec7n b\u1ed1n cao li\u00ean t\u1ee5c v\u00e0 2 m\u00e1y cu\u1ed9n s\u1ebd \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng, v\u1edbi s\u1ea3n l\u01b0\u1ee3ng h\u00e0ng n\u0103m l\u00e0 175 tri\u1ec7u t\u1ea5n. Trong giai \u0111o\u1ea1n th\u1ee9 hai, m\u1ed9t l\u00f2 nung d\u1ea7m di \u0111\u1ed9ng, m\u1ed9t m\u00e1y c\u00e1n th\u00f4 hai con l\u0103n v\u00e0 m\u1ed9t m\u00e1y cu\u1ed9n s\u1ebd \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng, v\u1edbi s\u1ea3n l\u01b0\u1ee3ng h\u00e0ng n\u0103m \u0111\u1ea1t 3,5 tri\u1ec7u t\u1ea5n v\u00e0 m\u1ed9t \u0111\u01a1n v\u1ecb san l\u1ea5p v\u00e0 cu\u1ed9n c\u00f3 s\u1ea3n l\u01b0\u1ee3ng h\u00e0ng n\u0103m l\u00e0 800.000 t\u1ea5n s\u1ebd \u0111\u01b0\u1ee3c b\u1ed5 sung. B\u1ed1 tr\u00ed quy tr\u00ecnh \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong H\u00ecnh 1. C\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u00e1n c\u1ee7a d\u00e2y chuy\u1ec1n c\u00e1n \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong B\u1ea3ng 1.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

L\u00f2 nung s\u1ed1 1-3 (d\u1ef1 ph\u00f2ng); L\u00f2 nung s\u1ed1 2-2; L\u00f2 nung s\u1ed1 3-3; M\u00e1y t\u1ea9y c\u1eb7n th\u00f4 4; M\u00e1y nghi\u1ec1n tr\u1ee5c \u0111\u1ee9ng 5-R1 (d\u1ef1 ph\u00f2ng); M\u00e1y nghi\u1ec1n tr\u1ee5c \u0111\u1ee9ng 6-R1 (d\u1ef1 ph\u00f2ng); M\u00e1y nghi\u1ec1n tr\u1ee5c \u0111\u1ee9ng 7-R2; M\u00e1y nghi\u1ec1n th\u00f4 b\u1ed1n t\u1ea7ng 8-R2; V\u1ecf c\u00e1ch nhi\u1ec7t ph\u00f4i trung gian 9; M\u00e1y c\u1eaft bay 10 \u0111\u1ea7u; M\u00e1y nghi\u1ec1n tr\u1ee5c \u0111\u1ee9ng 11-F1E; M\u00e1y nghi\u1ec1n tr\u1ee5c \u0111\u1ee9ng 12-M\u00e1y c\u00e1n ho\u00e0n thi\u1ec7n b\u1ea3y gi\u00e1 \u0111\u1ee1; 13\u2014Ph\u00f2ng \u0111o l\u01b0\u1eddng; 14\u2014L\u00e0m m\u00e1t d\u00f2ng ch\u1ea3y t\u1ea7ng; 15\u2014M\u00e1y cu\u1ed9n s\u1ed1 1; 16\u2014M\u00e1y cu\u1ed9n s\u1ed1 2; 17\u2014M\u00e1y cu\u1ed9n s\u1ed1 3 (d\u1ef1 ph\u00f2ng); 18\u2014M\u00e1y \u0111\u00f3ng ki\u1ec7n s\u1ed1 1; 19\u2014M\u00e1y \u0111\u00f3ng ki\u1ec7n s\u1ed1 2; 20\u2014M\u00e1y \u0111\u00f3ng ki\u1ec7n s\u1ed1 3 (d\u1ef1 ph\u00f2ng); 21\u2014D\u00e2y chuy\u1ec1n ki\u1ec3m tra th\u00e1o cu\u1ed9n; 22\u2014M\u00e1y \u0111\u00f3ng ki\u1ec7n s\u1ed1 4; 23\u2014M\u00e1y phun s\u1ed1; 24\u2014D\u1ea7m \u0111i b\u1ed9 kho<\/strong><\/strong><\/p>\n\n\n\n

H\u00ecnh 1 S\u01a1 \u0111\u1ed3 quy tr\u00ecnh c\u00e1n n\u00f3ng li\u00ean t\u1ee5c (h\u1ed9p ch\u1ea5m bi bi\u1ec3u th\u1ecb thi\u1ebft b\u1ecb d\u1ef1 tr\u1eef)<\/strong><\/strong><\/p>\n\n\n\n

B\u1ea3ng 1 T\u1ed5ng quan v\u1ec1 1780 tr\u1ee5c c\u00e1n n\u00f3ng li\u00ean t\u1ee5c<\/strong><\/p>\n\n\n\n

<\/td> <\/td>K\u00edch th\u01b0\u1edbc cu\u1ed9n\/mm \u0110\u01b0\u1eddng k\u00ednh cu\u1ed9n t\u1ed1i \u0111a\/t\u1ed1i thi\u1ec3u \u00d7 chi\u1ec1u d\u00e0i th\u00e2n cu\u1ed9n \u00d7 chi\u1ec1u d\u00e0i t\u1ed5ng cu\u1ed9n<\/td>V\u1eadt li\u1ec7u cu\u1ed9n<\/td>Tr\u1ecdng l\u01b0\u1ee3ng cu\u1ed9n\/t\u1ea5n<\/td><\/tr>
m\u00e1y nghi\u1ec1n th\u00f4 <\/td>R2 cu\u1ed9n l\u00e0m vi\u1ec7c<\/td>\u03a61200\/1100\u00d7 1780\u00d74 940<\/td>Th\u00e9p crom cao<\/td>25.9<\/td><\/tr>
R2 sao l\u01b0u cu\u1ed9n<\/td>\u03a61600\/1450\u00d71780\u00d75 760<\/td>Th\u00e9p r\u00e8n 45Cr4NiMoV<\/td>41.9<\/td><\/tr>
Nh\u00e0 m\u00e1y ho\u00e0n thi\u1ec7n<\/td>Cu\u1ed9n l\u00e0m vi\u1ec7c F1-3<\/td>\u03a6800\/710\u00d72080\u00d75 270<\/td>C\u1ea3i thi\u1ec7n s\u1eaft crom cao<\/td>12.5<\/td><\/tr>
Cu\u1ed9n l\u00e0m vi\u1ec7c F4<\/td>\u03a6800\/710\u00d72080\u00d75 270<\/td>\u0110\u1ed9 c\u1ee9ng v\u00f4 h\u1ea1n niken crom cao \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n<\/td>12.5<\/td><\/tr>
Cu\u1ed9n l\u00e0m vi\u1ec7c F5-7<\/td>\u03a6700\/630\u00d72080\u00d75 250<\/td>Gang \u0111\u00fac \u0111\u01b0\u1ee3c l\u00e0m l\u1ea1nh v\u00f4 c\u1ea5p c\u00f3 h\u00e0m l\u01b0\u1ee3ng niken crom cao \u0111\u01b0\u1ee3c c\u1ea3i ti\u1ebfn<\/td>9.8<\/td><\/tr>
Cu\u1ed9n d\u1ef1 ph\u00f2ng F1-4<\/td>\u03a61 600\/1 450\u00d71780\u00d75 760<\/td>Th\u00e9p r\u00e8n 45Cr4NiMoV<\/td>41.9<\/td><\/tr>
Cu\u1ed9n d\u1ef1 ph\u00f2ng F5-6<\/td>\u03a61 600\/1 450\u00d71780\u00d75 760<\/td>Th\u00e9p r\u00e8n 45Cr4NiMoV<\/td>41.9<\/td><\/tr>
Cu\u1ed9n d\u1ef1 ph\u00f2ng F7<\/td>\u03a61 600\/1 450\u00d71780\u00d75 760<\/td>Th\u00e9p r\u00e8n 45Cr4NiMoV<\/td>41.9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

B\u00f3c c\u00e1c c\u1ea1nh c\u1ee7a R2 <\/strong>cu\u1ed9n d\u1ef1 ph\u00f2ng<\/strong>\u00a0c\u1ee7a nh\u00e0 m\u00e1y th\u00f4<\/strong><\/h2>\n\n\n\n

L\u00f4 d\u1ef1 ph\u00f2ng n\u01a1i \u0111\u1ea7u l\u00f4 b\u1ecb bong ra l\u00e0 l\u00f4 d\u1ef1 ph\u00f2ng d\u01b0\u1edbi c\u1ee7a m\u00e1y c\u00e1n th\u00f4 R2. T\u1ed5ng c\u1ed9ng \u0111\u00e3 c\u00e1n 114.000 t\u1ea5n th\u00e9p. Kh\u1ed1i c\u1ea1nh x\u1ea3y ra \u1edf m\u1ed9t \u0111\u1ea7u c\u1ee7a m\u1eb7t truy\u1ec1n \u0111\u1ed9ng c\u1ee7a th\u00e2n l\u00f4. H\u01b0\u1edbng chu vi g\u1ea7n 1000mm, chi\u1ec1u r\u1ed9ng tr\u1ee5c l\u00e0 200mm v\u00e0 h\u01b0\u1edbng xuy\u00ean t\u00e2m l\u00e0 90mm. Sau khi ra kh\u1ecfi m\u00e1y, \u0111\u1ed9 c\u1ee9ng c\u1ee7a b\u1ec1 m\u1eb7t l\u00f4 \u0111\u01b0\u1ee3c \u0111o v\u00e0 t\u1ed1i \u0111a l\u00e0 HS71.2.<\/p>\n\n\n\n

X\u00e9t theo h\u00ecnh th\u00e1i c\u1ee7a m\u00e9p b\u1ecb g\u00e3y c\u1ee7a con l\u0103n d\u1ef1 ph\u00f2ng, ngu\u1ed3n g\u1ed1c c\u1ee7a v\u1ebft n\u1ee9t xu\u1ea5t hi\u1ec7n tr\u00ean b\u1ec1 m\u1eb7t con l\u0103n, v\u00e0 kh\u00f4ng th\u1ea5y t\u1ea1p ch\u1ea5t ho\u1eb7c khuy\u1ebft t\u1eadt gi\u00e3n n\u1edf ngu\u1ed3n n\u1ee9t n\u00e0o \u1edf c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c. X\u00e9t theo hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y, t\u1ed5n th\u1ea5t th\u1ecbt \u1edf b\u1ed9 ph\u1eadn n\u00e0y ch\u1ee7 y\u1ebfu l\u00e0 do c\u00e1c v\u1ebft n\u1ee9t nh\u1ecf do m\u1ecfi g\u00e2y ra do \u1ee9ng su\u1ea5t c\u1ea1nh qu\u00e1 m\u1ee9c. C\u00e1c v\u1ebft n\u1ee9t nh\u1ecf do m\u1ecfi l\u00e0 do s\u1ef1 gi\u00e3n n\u1edf v\u1ebft n\u1ee9t do t\u1ea3i tr\u1ecdng va \u0111\u1eadp xen k\u1ebd th\u01b0\u1eddng xuy\u00ean g\u00e2y ra.<\/p>\n\n\n\n

Hi\u1ec7u su\u1ea5t ki\u1ec3m tra t\u1ea1i nh\u00e0 m\u00e1y c\u1ee7a cu\u1ed9n d\u1ef1 ph\u00f2ng \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n \u1edf B\u1ea3ng 2.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

H\u00ecnh 2 \u1ea2nh ch\u1ee5p hi\u1ec7n t\u01b0\u1ee3ng bong tr\u00f3c c\u1ee7a <\/strong>cu\u1ed9n d\u1ef1 ph\u00f2ng<\/strong> trong nh\u00e0 m\u00e1y th\u00f4<\/strong><\/strong><\/p>\n\n\n\n

B\u1ea3ng 2 C\u00e1c th\u00f4ng s\u1ed1 ki\u1ec3m tra hi\u1ec7u su\u1ea5t con l\u0103n h\u1ed7 tr\u1ee3<\/strong><\/p>\n\n\n\n

\u0110\u1ed9 c\u1ee9ng th\u00e2n l\u0103n HSD<\/td>\u0110\u1ed9 c\u1ee9ng c\u1ee7a c\u1ed5 l\u0103n HSD<\/td>\u0110\u1ed9 d\u00e0y l\u1edbp c\u1ee9ng\/mm<\/td>Gi\u1edbi h\u1ea1n ch\u1ea3y \u03c3s\/MPa<\/td>\u0110\u1ed9 b\u1ec1n k\u00e9o \u03c3b\/MPa<\/td>\u0110\u1ed9 gi\u00e3n d\u00e0i \u03b4\/%<\/td>\u0110\u1ed9 co ng\u00f3t c\u1ee7a ti\u1ebft di\u1ec7n \u03c8\/%<\/td>N\u0103ng l\u01b0\u1ee3ng va ch\u1ea1m Akv\/J<\/td><\/tr>
65~67<\/td>45~50<\/td>\u226580<\/td>\u2265650<\/td>\u2265900<\/td>\u226412<\/td>\u226540<\/td>\u226524<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n g\u00e2y bong tr\u00f3c c\u1ea1nh<\/strong><\/h2>\n\n\n\n

Hi\u1ec7u \u1ee9ng l\u00e0m vi\u1ec7c c\u1ee9ng<\/strong><\/h3>\n\n\n\n

Con l\u0103n d\u1ef1 ph\u00f2ng lu\u00f4n duy tr\u00ec ti\u1ebfp x\u00fac l\u0103n v\u1edbi con l\u0103n l\u00e0m vi\u1ec7c c\u00f3 \u0111\u1ed9 c\u1ee9ng cao v\u00e0 b\u1ec1 m\u1eb7t con l\u0103n ch\u1ecbu \u1ee9ng su\u1ea5t ti\u1ebfp x\u00fac \u0111\u1ecbnh k\u1ef3. \u1ee8ng su\u1ea5t ti\u1ebfp x\u00fac l\u0103n \u0111\u1ecbnh k\u1ef3 t\u1ea1o ra l\u1edbp l\u00e0m c\u1ee9ng tr\u00ean b\u1ec1 m\u1eb7t con l\u0103n d\u1ef1 ph\u00f2ng. Khi gi\u00e1 tr\u1ecb \u1ee9ng su\u1ea5t t\u0103ng theo m\u1ee9c \u0111\u1ed9 l\u00e0m c\u1ee9ng v\u00e0 \u1ee9ng su\u1ea5t l\u0103n v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n ch\u1ea3y c\u1ee7a v\u1eadt li\u1ec7u, c\u00e1c v\u1ebft n\u1ee9t nh\u1ecf s\u1ebd xu\u1ea5t hi\u1ec7n v\u00e0 sau \u0111\u00f3 m\u1edf r\u1ed9ng g\u00e2y ra bong tr\u00f3c.<\/p>\n\n\n\n

T\u00e1c \u0111\u1ed9ng c\u1ee7a s\u1ef1 hao m\u00f2n kh\u00f4ng \u0111\u1ec1u<\/strong><\/h3>\n\n\n\n

S\u1ef1 m\u00e0i m\u00f2n b\u1ec1 m\u1eb7t c\u1ee7a cu\u1ed9n d\u1ef1 ph\u00f2ng<\/a>\u00a0kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u, l\u1edbp t\u00f4i luy\u1ec7n ph\u00e2n b\u1ed1 th\u00e0nh t\u1eebng d\u1ea3i. \u0110\u1ed9 c\u1ee9ng v\u00e0 tr\u1ea1ng th\u00e1i \u1ee9ng su\u1ea5t kh\u00e1c nhau gi\u1eefa c\u00e1c d\u1ea3i kh\u00e1c nhau. N\u1ebfu qu\u00e1 t\u1ea3i trong qu\u00e1 tr\u00ecnh c\u00e1n, ch\u1eb3ng h\u1ea1n nh\u01b0 l\u00f4 c\u00e1n b\u1ecb bong tr\u00f3c, qu\u1ea5n l\u00f4, k\u1eb9t th\u00e9p, tr\u01b0\u1ee3t v\u00e0 c\u00e1c tai n\u1ea1n c\u00e1n kh\u00e1c, nh\u00fang v\u1ea3y oxit s\u1eaft, x\u00f3i m\u00f2n n\u01b0\u1edbc l\u00e0m m\u00e1t b\u1ec1 m\u1eb7t l\u00f4, v.v., \u1ee9ng su\u1ea5t c\u1eaft c\u1ee5c b\u1ed9 c\u1ee7a l\u00f4 d\u1ef1 ph\u00f2ng s\u1ebd t\u0103ng l\u00ean v\u00e0 bi\u1ebfn d\u1ea1ng. C\u00e1c v\u1ebft n\u1ee9t si\u00eau nh\u1ecf d\u01b0\u1edbi da \u0111\u01b0\u1ee3c t\u1ea1o ra \u1edf \u0111\u00e1y c\u1ee7a l\u1edbp t\u00f4i luy\u1ec7n, v\u00e0 c\u00e1c v\u1ebft n\u1ee9t si\u00eau nh\u1ecf ph\u00e1t tri\u1ec3n t\u1eeb b\u00ean trong ra b\u00ean ngo\u00e0i b\u1ec1 m\u1eb7t l\u00f4, g\u00e2y ra t\u00ecnh tr\u1ea1ng bong tr\u00f3c v\u00e0 r\u01a1i ra.<\/p>\n\n\n\n

Tr\u01b0\u1edbc khi x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng bong tr\u00f3c, lo\u1ea1i v\u1ebft n\u1ee9t si\u00eau nh\u1ecf n\u00e0y r\u1ea5t kh\u00f3 ph\u00e1t hi\u1ec7n trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng l\u00f4 v\u00e0 kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y v\u1ebft n\u1ee9t m\u1edf r\u1ed9ng. N\u1ebfu nh\u1eefng v\u1ebft n\u1ee9t si\u00eau nh\u1ecf d\u01b0\u1edbi da n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n v\u00e0 lo\u1ea1i b\u1ecf trong qu\u00e1 tr\u00ecnh m\u00e0i l\u00f4 ngo\u1ea1i tuy\u1ebfn, c\u00e1c v\u1ebft n\u1ee9t s\u1ebd ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng khi s\u1eed d\u1ee5ng l\u1ea1i, lan \u0111\u1ebfn b\u1ec1 m\u1eb7t l\u00f4 v\u00e0 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng bong tr\u00f3c.<\/p>\n\n\n\n

T\u00e1c \u0111\u1ed9ng c\u1ee7a l\u1ed7i s\u1ea3n xu\u1ea5t<\/strong><\/h3>\n\n\n\n

Trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t, c\u00f3 nh\u1eefng khuy\u1ebft t\u1eadt nh\u01b0 t\u1ea1p ch\u1ea5t phi kim lo\u1ea1i ho\u1eb7c n\u1ebfp g\u1ea5p \u1edf l\u1edbp l\u00e0m vi\u1ec7c c\u1ee7a th\u00e2n tr\u1ee5c l\u0103n. C\u00f3 s\u1ef1 t\u1eadp trung \u1ee9ng su\u1ea5t \u1edf c\u00e1c g\u00f3c nh\u1ecdn. Sau m\u1ed9t th\u1eddi gian s\u1eed d\u1ee5ng nh\u1ea5t \u0111\u1ecbnh, c\u00e1c v\u1ebft n\u1ee9t nh\u1ecf s\u1ebd xu\u1ea5t hi\u1ec7n v\u00e0 m\u1edf r\u1ed9ng theo h\u01b0\u1edbng khuy\u1ebft t\u1eadt v\u00e0 \u1ee9ng su\u1ea5t, cu\u1ed1i c\u00f9ng g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng bong tr\u00f3c.<\/p>\n\n\n\n

Hi\u1ec7u \u1ee9ng c\u1ee7a vi\u1ec7c v\u00e1t m\u00e9p b\u00ean cu\u1ed9n<\/strong><\/h3>\n\n\n\n

\u0110\u1ec3 ki\u1ec3m so\u00e1t h\u00ecnh d\u1ea1ng t\u1ea5m, c\u00e1c con l\u0103n u\u1ed1n th\u1ee7y l\u1ef1c \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t trong nh\u1eefng thi\u1ebft b\u1ecb c\u1ea7n thi\u1ebft trong c\u00e1c nh\u00e0 m\u00e1y c\u00e1n th\u00e9p t\u1ea5m v\u00e0 th\u00e9p d\u1ea3i. Trong qu\u00e1 tr\u00ecnh c\u00e1n, d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a l\u1ef1c u\u1ed1n con l\u0103n, \u1ee9ng su\u1ea5t ti\u1ebfp x\u00fac \u1edf hai \u0111\u1ea7u con l\u0103n d\u1ef1 ph\u00f2ng v\u00e0 con l\u0103n l\u00e0m vi\u1ec7c t\u0103ng nhanh. Khi v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n ch\u1ea3y c\u1ee7a v\u1eadt li\u1ec7u, bi\u1ebfn d\u1ea1ng d\u1ebbo x\u1ea3y ra v\u00e0 nhi\u1ec1u bi\u1ebfn d\u1ea1ng xen k\u1ebd s\u1ebd t\u1ea1o ra c\u00e1c v\u1ebft n\u1ee9t nh\u1ecf. S\u1ef1 lan truy\u1ec1n v\u1ebft n\u1ee9t s\u1ebd khi\u1ebfn c\u00e1c \u0111\u1ea7u b\u1ecb bong ra.<\/p>\n\n\n\n

Bi\u1ec7n ph\u00e1p \u0111\u1ed1i ph\u00f3<\/strong><\/h2>\n\n\n\n

T\u0103ng c\u01b0\u1eddng \u0111\u00e1nh gi\u00e1 chu k\u1ef3 thay th\u1ebf con l\u0103n<\/strong><\/h3>\n\n\n\n

X\u01b0\u1edfng c\u00e1n th\u00e9p v\u00e0 x\u01b0\u1edfng m\u00e0i l\u00f4 \u0111\u00e3 l\u1eadp h\u1ed3 s\u01a1 s\u1eed d\u1ee5ng l\u00f4 ho\u00e0n ch\u1ec9nh, l\u01b0u gi\u1eef h\u1ed3 s\u01a1 chi ti\u1ebft v\u1ec1 t\u00ecnh tr\u1ea1ng s\u1eed d\u1ee5ng v\u00e0 m\u00e0i tr\u1ef1c tuy\u1ebfn c\u1ee7a t\u1eebng l\u00f4, th\u1ef1c hi\u1ec7n nghi\u00eam ng\u1eb7t h\u1ec7 th\u1ed1ng thay l\u00f4 cho c\u00e1c lo\u1ea1i l\u00f4, ki\u00ean quy\u1ebft ch\u1ea5m d\u1ee9t hi\u1ec7n t\u01b0\u1ee3ng l\u00f4 kh\u00f4ng s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c. Ph\u00f2ng k\u1ef9 thu\u1eadt \u0111\u00e1nh gi\u00e1 vi\u1ec7c th\u1ef1c hi\u1ec7n h\u1ec7 th\u1ed1ng thay l\u00f4. Chu k\u1ef3 thay l\u00f4 \u0111\u00e3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong B\u1ea3ng 3.<\/p>\n\n\n\n

B\u1ea3ng 3 Chu k\u1ef3 thay th\u1ebf cu\u1ed9n<\/strong><\/p>\n\n\n\n

T\u00ean cu\u1ed9n<\/td>Chu k\u1ef3 thay \u0111\u1ed5i cu\u1ed9n<\/td>Chu k\u1ef3 thay \u0111\u1ed5i cu\u1ed9n<\/td><\/tr>
m\u00e1y c\u00e1n th\u00f4 <\/td>R2 cu\u1ed9n l\u00e0m vi\u1ec7c<\/td>30.000 t\u1ea5n<\/td><\/tr>
R2 sao l\u01b0u cu\u1ed9n<\/td>100.000 t\u1ea5n<\/td><\/tr>
ho\u00e0n thi\u1ec7n nh\u00e0 m\u00e1y c\u00e1n<\/td>Cu\u1ed9n l\u00e0m vi\u1ec7c F1-3<\/td>m\u1ed7i l\u1edbp<\/td><\/tr>
Cu\u1ed9n l\u00e0m vi\u1ec7c F4<\/td>m\u1ed7i l\u1edbp<\/td><\/tr>
Cu\u1ed9n l\u00e0m vi\u1ec7c F5-7<\/td>m\u1ed7i l\u1edbp<\/td><\/tr>
Cu\u1ed9n d\u1ef1 ph\u00f2ng F1-4<\/td>200.000 t\u1ea5n<\/td><\/tr>
Cu\u1ed9n d\u1ef1 ph\u00f2ng F5-6<\/td>150.000 t\u1ea5n<\/td><\/tr>
Cu\u1ed9n d\u1ef1 ph\u00f2ng F7<\/td>100.000 t\u1ea5n<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

T\u0103ng c\u01b0\u1eddng ph\u00e1t hi\u1ec7n s\u1ef1 c\u1ee9ng h\u00f3a b\u1ec1 m\u1eb7t l\u00e0m vi\u1ec7c c\u1ee7a <\/strong>cu\u1ed9n d\u1ef1 ph\u00f2ng<\/strong>\u00a0th\u00e2n h\u00ecnh<\/strong><\/h3>\n\n\n\n

Sau khi l\u00f4 d\u1ef1 ph\u00f2ng ra kh\u1ecfi d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t, \u0111\u1ed9 c\u1ee9ng c\u1ee7a b\u1ec1 m\u1eb7t l\u00f4 \u0111\u01b0\u1ee3c ki\u1ec3m tra v\u00e0 ghi l\u1ea1i \u0111\u1ec3 x\u00e1c nh\u1eadn \u0111\u1ed9 c\u1ee9ng t\u0103ng l\u00ean v\u00e0 \u0111\u1ed9 c\u1ee9ng kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u. Sau khi m\u00e0i xong, h\u00e3y ki\u1ec3m tra l\u1ea1i \u0111\u1ed9 c\u1ee9ng c\u1ee7a b\u1ec1 m\u1eb7t l\u00f4 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o l\u1edbp t\u00f4i c\u1ee9ng do gia c\u00f4ng \u0111\u00e3 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n. Gi\u00e1 tr\u1ecb \u0111\u1ed9 c\u1ee9ng kh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qu\u00e1 gi\u00e1 tr\u1ecb \u0111\u1ed9 c\u1ee9ng khi m\u00e1y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u1ea7n cu\u1ed1i. Trong th\u1eddi gian s\u1eed d\u1ee5ng l\u00f4 h\u1ed7 tr\u1ee3 sau n\u00e0y, h\u00e3y s\u1eed d\u1ee5ng kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c l\u1ea7n thay l\u00f4 l\u00e0m vi\u1ec7c \u0111\u1ec3 ph\u00e1t hi\u1ec7n gi\u00e1 tr\u1ecb \u0111\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t c\u1ee7a l\u00f4 d\u1ef1 ph\u00f2ng. N\u1ebfu ph\u00e1t hi\u1ec7n b\u1ea5t k\u1ef3 b\u1ea5t th\u01b0\u1eddng n\u00e0o, vui l\u00f2ng tham kh\u1ea3o \u00fd ki\u1ebfn k\u1ef9 thu\u1eadt vi\u00ean k\u1ecbp th\u1eddi \u0111\u1ec3 x\u00e1c nh\u1eadn xem l\u00f4 c\u00f3 c\u1ea7n thay th\u1ebf hay kh\u00f4ng.<\/p>\n\n\n\n

T\u0103ng l\u01b0\u1ee3ng nghi\u1ec1n m\u1ed9t c\u00e1ch th\u00edch h\u1ee3p <\/strong>cu\u1ed9n d\u1ef1 ph\u00f2ng<\/strong><\/h3>\n\n\n\n

V\u00ec tr\u1ee5c d\u1ef1 ph\u00f2ng c\u00f3 tu\u1ed5i th\u1ecd tr\u1ef1c tuy\u1ebfn t\u01b0\u01a1ng \u0111\u1ed1i d\u00e0i, n\u00ean l\u1edbp m\u1ecfi ph\u1ea3i \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n trong qu\u00e1 tr\u00ecnh m\u00e0i. Trong s\u1ea3n xu\u1ea5t th\u1ef1c t\u1ebf, th\u00f4ng qua ki\u1ec3m tra v\u00e0 th\u0103m d\u00f2, tr\u1ee5c d\u1ef1 ph\u00f2ng c\u00e1n th\u00f4 v\u00e0 c\u00e1n ho\u00e0n thi\u1ec7n th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ed9t chu k\u1ef3 v\u00e0 sau khi lo\u1ea1i b\u1ecf \u0111\u1ed9 m\u00f2n, l\u1edbp m\u1ecfi kho\u1ea3ng 0,5 \u0111\u1ebfn 1 mm \u0111\u01b0\u1ee3c x\u1eed l\u00fd \u0111\u1ec3 gi\u1ea3m v\u1ebft n\u1ee9t m\u1ecfi v\u00e0 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a tr\u1ee5c. Sau khi m\u00e0i, h\u00e3y nh\u1ea5n m\u1ea1nh v\u00e0o th\u1eed nghi\u1ec7m d\u00f2ng \u0111i\u1ec7n xo\u00e1y.<\/p>\n\n\n\n

T\u1ed1i \u01b0u h\u00f3a vi\u1ec7c v\u00e1t m\u00e9p \u1edf ph\u1ea7n cu\u1ed1i <\/strong>cu\u1ed9n d\u1ef1 ph\u00f2ng<\/strong>\u00a0th\u00e2n h\u00ecnh<\/strong><\/h3>\n\n\n\n

V\u00e1t m\u00e9p ban \u0111\u1ea7u c\u1ee7a tr\u1ee5c d\u1ef1 ph\u00f2ng l\u00e0 150mm\u00d71.0mm, qu\u00e1 nh\u1ecf. Sau khi \u0111i\u1ec1u ch\u1ec9nh, v\u00e1t m\u00e9p c\u1ee7a tr\u1ee5c d\u1ef1 ph\u00f2ng l\u00e0 200~250mm\u00d71.5mm. Chi\u1ec1u d\u00e0i v\u00e1t m\u00e9p \u0111\u01b0\u1ee3c thay \u0111\u1ed5i m\u1ed7i l\u1ea7n khi m\u00e0i. Chi\u1ec1u d\u00e0i v\u00e1t m\u00e9p l\u00e0 200mm v\u00e0 250mm, xen k\u1ebd; h\u00ecnh d\u1ea1ng v\u00e1t m\u00e9p l\u00e0 h\u00ecnh d\u1ea1ng chuy\u1ec3n ti\u1ebfp tr\u01a1n tru.<\/p>\n\n\n\n

Th\u00eam thi\u1ebft b\u1ecb ph\u00e1t hi\u1ec7n khuy\u1ebft t\u1eadt si\u00eau \u00e2m<\/strong><\/h3>\n\n\n\n

M\u00e1y m\u00e0i ch\u1ec9 \u0111\u01b0\u1ee3c trang b\u1ecb thi\u1ebft b\u1ecb ph\u00e1t hi\u1ec7n l\u1ed7i d\u00f2ng \u0111i\u1ec7n xo\u00e1y, kh\u00f4ng th\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 \u0111\u1ecbnh v\u1ecb c\u00e1c l\u1ed7i s\u00e2u. Kh\u00f4ng th\u1ec3 ti\u1ebfn h\u00e0nh ki\u1ec3m tra hi\u1ec7u qu\u1ea3 v\u00e0 to\u00e0n di\u1ec7n \u0111\u1ed1i v\u1edbi c\u00e1c cu\u1ed9n m\u1edbi nh\u1eadp v\u00e0o nh\u00e0 m\u00e1y. Kh\u00f4ng th\u1ec3 t\u00ecm th\u1ea5y c\u00e1c l\u1ed7i \u1ea9n trong c\u00e1c cu\u1ed9n m\u1edbi nh\u1eadp v\u00e0o nh\u00e0 m\u00e1y v\u00e0 c\u0169ng kh\u00f4ng th\u1ec3 ti\u1ebfn h\u00e0nh ki\u1ec3m tra chuy\u00ean s\u00e2u c\u00e1c cu\u1ed9n c\u00f3 l\u1ed7i ra kh\u1ecfi d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t. Sau khi n\u1ed9p \u0111\u01a1n xin mua m\u00e1y d\u00f2 l\u1ed7i si\u00eau \u00e2m, ch\u00fang t\u00f4i c\u00f3 th\u1ec3 ti\u1ebfn h\u00e0nh ki\u1ec3m tra to\u00e0n di\u1ec7n c\u00e1c cu\u1ed9n m\u1edbi nh\u1eadp v\u00e0o nh\u00e0 m\u00e1y v\u00e0 ti\u1ebfn h\u00e0nh ki\u1ec3m tra t\u1eadp trung c\u00e1c cu\u1ed9n ra kh\u1ecfi d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n

Ph\u1ea7n k\u1ebft lu\u1eadn<\/strong><\/h2>\n\n\n\n

Vi\u1ec7c s\u1ea3n xu\u1ea5t l\u00f4 d\u1ef1 ph\u00f2ng tr\u1ecdng l\u01b0\u1ee3ng n\u1eb7ng \u0111\u00f2i h\u1ecfi ph\u1ea3i s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng quy m\u00f4 l\u1edbn, d\u1eabn \u0111\u1ebfn chu k\u1ef3 s\u1ea3n xu\u1ea5t d\u00e0i v\u00e0 chi ph\u00ed mua s\u1eafm cao. N\u00f3 c\u0169ng c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m l\u00e0 tu\u1ed5i th\u1ecd d\u00e0i, chi ph\u00ed s\u1eed d\u1ee5ng cao v\u00e0 t\u1ed5n th\u1ea5t l\u1edbn sau khi h\u1ecfng h\u00f3c b\u1ea5t th\u01b0\u1eddng. Ph\u1ea3i ch\u00fa \u00fd nghi\u00eam ng\u1eb7t \u0111\u1ebfn vi\u1ec7c s\u1ea3n xu\u1ea5t v\u00e0 s\u1eed d\u1ee5ng l\u00f4 d\u1ef1 ph\u00f2ng. Ti\u1ebfp x\u00fac l\u0103n d\u00e0i h\u1ea1n gi\u1eefa l\u00f4 d\u1ef1 ph\u00f2ng v\u00e0 l\u00f4 l\u00e0m vi\u1ec7c d\u1ec5 g\u00e2y ra v\u1ebft n\u1ee9t m\u1ecfi tr\u00ean b\u1ec1 m\u1eb7t l\u00f4 v\u00e0 s\u1ef1 m\u1edf r\u1ed9ng c\u1ee7a c\u00e1c v\u1ebft n\u1ee9t nh\u1ecf cu\u1ed1i c\u00f9ng s\u1ebd d\u1eabn \u0111\u1ebfn bong tr\u00f3c l\u00f4. Ph\u00e1t hi\u1ec7n v\u00e0 theo d\u00f5i \u0111\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t c\u1ee7a l\u00f4 d\u1ef1 ph\u00f2ng, thi\u1ebft k\u1ebf v\u00e1t th\u00e2n l\u00f4 d\u1ef1 ph\u00f2ng h\u1ee3p l\u00fd, \u0111i\u1ec1u ch\u1ec9nh h\u1ee3p l\u00fd chu k\u1ef3 thay th\u1ebf l\u00f4 v\u00e0 b\u1ed5 sung c\u00e1c thi\u1ebft b\u1ecb ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y si\u00eau \u00e2m \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00f3 th\u1ec3 ng\u0103n ng\u1eeba s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a t\u00ecnh tr\u1ea1ng bong tr\u00f3c l\u00f4 d\u1ef1 ph\u00f2ng v\u00e0 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a l\u00f4 d\u1ef1 ph\u00f2ng.<\/p>","protected":false},"excerpt":{"rendered":"

Abstract: An analysis of the peeling and chipping of the backup rolls at the edges of the backup rolls of Angang’s 1780 hot tandem roughing mill was conducted. It was believed that work hardening, uneven wear, fatigue micro-cracks, and unreasonable roll side chamfer design were the main reasons for the roll peelings. Based on actual […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-655","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n1780 Cause Analysis and Preventive Measures for Spalling of backup rolls\u00a0in Hot Continuous Rolling - Work rolls, Backup rolls, Strip rolls - LMM GROUP Mill rolls manufacturer<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lmmworkrolls.com\/vi\/1780-phan-tich-nguyen-nhan-va-bien-phap-phong-ngua-hien-tuong-bong-troc-lo-du-phong-trong-qua-trinh-can-nong-lien-tuc\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"1780 Cause Analysis and Preventive Measures for Spalling of backup rolls\u00a0in Hot Continuous Rolling\" \/>\n<meta property=\"og:description\" content=\"Abstract: An analysis of the peeling and chipping of the backup rolls at the edges of the backup rolls of Angang’s 1780 hot tandem roughing mill was conducted. 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