{"id":602,"date":"2024-02-26T06:31:35","date_gmt":"2024-02-26T06:31:35","guid":{"rendered":"https:\/\/lmmworkrolls.com\/?p=602"},"modified":"2024-02-26T06:31:40","modified_gmt":"2024-02-26T06:31:40","slug":"phan-tich-ve-nguyen-nhan-gay-bong-troc-be-mat-lo-can-trong-qua-trinh-can-nguoi-song-song","status":"publish","type":"post","link":"https:\/\/lmmworkrolls.com\/vi\/phan-tich-ve-nguyen-nhan-gay-bong-troc-be-mat-lo-can-trong-qua-trinh-can-nguoi-song-song\/","title":{"rendered":"Ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n g\u00e2y bong tr\u00f3c b\u1ec1 m\u1eb7t l\u00f4 c\u00e1n trong qu\u00e1 tr\u00ecnh c\u00e1n ngu\u1ed9i song song"},"content":{"rendered":"

C\u00e1c cu\u1ed9n c\u00e1n ngu\u1ed9i<\/a> l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng quy m\u00f4 l\u1edbn c\u1ee7a \u0111\u01a1n v\u1ecb c\u00e1n ngu\u1ed9i song song. Quy tr\u00ecnh s\u1ea3n xu\u1ea5t c\u1ee7a n\u00f3 t\u01b0\u01a1ng \u0111\u1ed1i ph\u1ee9c t\u1ea1p v\u00e0 m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c kh\u1eafc nghi\u1ec7t. N\u00f3 ph\u1ea3i ch\u1ecbu ma s\u00e1t, \u1ee9ng su\u1ea5t nhi\u1ec7t, va \u0111\u1eadp v\u00e0 c\u00e1c \u1ee9ng su\u1ea5t kh\u00e1c. Trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng, n\u00f3 c\u00f3 th\u1ec3 b\u1ecb g\u00e3y, bong tr\u00f3c, m\u00f2n, v.v. v\u00e0 sau \u0111\u00f3 h\u1ecfng. , l\u00e0m t\u0103ng chi ph\u00ed v\u1eadt t\u01b0 ti\u00eau hao v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ea3n xu\u1ea5t, g\u00e2y ra t\u1ed5n th\u1ea5t kinh t\u1ebf. Trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t c\u00e1n th\u00f4ng th\u01b0\u1eddng c\u1ee7a d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t th\u00e9p kh\u00f4ng g\u1ec9 c\u1ee7a m\u1ed9t c\u00f4ng ty, b\u1ec1 m\u1eb7t c\u1ee7a tr\u1ee5c c\u00e1n ngu\u1ed9i li\u00ean t\u1ee5c \u0111\u1ed9t nhi\u00ean b\u1ecb bong ra, g\u00e2y ra s\u1ef1 c\u1ed1 v\u00e0 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng, \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn s\u1ea3n xu\u1ea5t b\u00ecnh th\u01b0\u1eddng. B\u00e0i vi\u1ebft n\u00e0y l\u1ea5y m\u1eabu bong tr\u00f3c c\u1ee7a tr\u1ee5c c\u00e1n ngu\u1ed9i song song l\u00e0m \u0111\u1ed1i t\u01b0\u1ee3ng ph\u00e2n t\u00edch. Th\u00f4ng qua c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m v\u1eadt l\u00fd v\u00e0 h\u00f3a h\u1ecdc nh\u01b0 g\u00e3y v\u1ee1 v\u0129 m\u00f4, \u0111o th\u00e0nh ph\u1ea7n quang ph\u1ed5, \u0111\u1ed9 c\u1ee9ng, c\u1ea5u tr\u00fac kim lo\u1ea1i v\u00e0 k\u00ednh hi\u1ec3n vi \u0111i\u1ec7n t\u1eed qu\u00e9t, k\u1ebft h\u1ee3p v\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n s\u1eed d\u1ee5ng h\u00e0ng ng\u00e0y, nguy\u00ean nh\u00e2n g\u00e2y bong tr\u00f3c b\u1ec1 m\u1eb7t tr\u1ee5c c\u00e1n \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch v\u00e0 th\u1ea3o lu\u1eadn.<\/p>\n\n\n\n

K\u1ebft qu\u1ea3 ki\u1ec3m tra l\u00fd h\u00f3a v\u00e0 quan s\u00e1t v\u1ebft n\u1ee9t c\u1ee7a kh\u1ed1i b\u00f3c<\/strong><\/h2>\n\n\n\n

Ti\u1ebfn h\u00e0nh ph\u00e2n t\u00edch h\u00ecnh th\u00e1i v\u0129 m\u00f4 c\u1ee7a c\u00e1c kh\u1ed1i b\u00f3c cu\u1ed9n (xem H\u00ecnh 1). C\u00f3 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m g\u00e3y m\u1ecfi \u0111i\u1ec3n h\u00ecnh tr\u00ean kh\u1ed1i b\u00f3c v\u00e0 c\u00e1c \u0111\u01b0\u1eddng g\u1edd r\u00f5 r\u00e0ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c quan s\u00e1t th\u1ea5y \u1edf khu v\u1ef1c v\u00f2ng tr\u00f2n trung t\u00e2m, \u0111\u00e2y l\u00e0 m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m quan tr\u1ecdng c\u1ee7a v\u00f9ng gi\u00e3n n\u1edf m\u1ecfi. T\u00e2m c\u1ee7a \u0111\u01b0\u1eddng v\u1ecf l\u00e0 ngu\u1ed3n m\u1ecfi, \u0111\u00e2y l\u00e0 khu v\u1ef1c b\u1eaft \u0111\u1ea7u c\u1ee7a c\u00e1c v\u1ebft n\u1ee9t m\u1ecfi. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng ngu\u1ed3n m\u1ecfi n\u1eb1m b\u00ean trong cu\u1ed9n ch\u1ee9 kh\u00f4ng ph\u1ea3i tr\u00ean b\u1ec1 m\u1eb7t; khu v\u1ef1c v\u00f2ng ngo\u00e0i chi\u1ebfm di\u1ec7n t\u00edch l\u1edbn nh\u1ea5t v\u00e0 h\u00ecnh th\u00e1i v\u0129 m\u00f4 l\u00e0 h\u01b0\u1edbng t\u00e2m, \u0111\u00e2y l\u00e0 v\u00f9ng g\u00e3y t\u1ee9c th\u1eddi. Trong tr\u01b0\u1eddng h\u1ee3p h\u1ecfng v\u1eadt li\u1ec7u k\u1ebft c\u1ea5u v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn c\u01a1 kh\u00ed, h\u01b0 h\u1ecfng m\u1ecfi kh\u00e1c v\u1edbi h\u01b0 h\u1ecfng do t\u1ea3i t\u0129nh. H\u1ea7u h\u1ebft ch\u00fang x\u1ea3y ra m\u00e0 kh\u00f4ng c\u00f3 c\u1ea3nh b\u00e1o v\u00e0 trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p b\u1ea5t ng\u1edd. Kh\u00f4ng c\u00f3 d\u1ea5u hi\u1ec7u r\u00f5 r\u00e0ng n\u00e0o xu\u1ea5t hi\u1ec7n tr\u01b0\u1edbc khi h\u1ecfng v\u00e0 h\u01b0 h\u1ecfng r\u1ea5t nghi\u00eam tr\u1ecdng.<\/p>\n\n\n\n

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S\u1eed d\u1ee5ng k\u00ednh hi\u1ec3n vi \u0111i\u1ec7n t\u1eed qu\u00e9t \u0111\u1ec3 quan s\u00e1t khu v\u1ef1c ngu\u1ed3n m\u1ecfi, ng\u01b0\u1eddi ta th\u1ea5y c\u00f3 c\u00e1c t\u1ea1p ch\u1ea5t d\u1ea1ng h\u1ea1t c\u00f3 \u0111\u01b0\u1eddng k\u00ednh kho\u1ea3ng 50 \u03bcm. K\u1ebft qu\u1ea3 EDS cho th\u1ea5y n\u00f3 ch\u1ee9a Ca, K, O, Mg, Al, Si v\u00e0 c\u00e1c nguy\u00ean t\u1ed1 kh\u00e1c (xem H\u00ecnh 2) v\u00e0 l\u00e0 t\u1ea1p ch\u1ea5t h\u1ed7n h\u1ee3p oxit h\u1ea1t l\u1edbn.<\/p>\n\n\n\n

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Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc: C\u1eaft m\u1eabu t\u1eeb kh\u1ed1i \u0111\u00e3 b\u00f3c \u0111\u1ec3 ph\u00e2n t\u00edch th\u00e0nh ph\u1ea7n quang ph\u1ed5. V\u1eadt li\u1ec7u c\u00e1n l\u00e0 8Cr3NiMoV. K\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong B\u1ea3ng 1. Ngo\u1ea1i tr\u1eeb nguy\u00ean t\u1ed1 Cr th\u1ea5p h\u01a1n m\u1ed9t ch\u00fat so v\u1edbi gi\u1edbi h\u1ea1n d\u01b0\u1edbi, c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c \u0111\u1ec1u n\u1eb1m trong ph\u1ea1m vi c\u1ee7a ti\u00eau chu\u1ea9n GB\/T1299-2014. M\u00e1y th\u1eed \u0111\u1ed9 c\u1ee9ng Rockwell \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng c\u1ee7a kh\u1ed1i \u0111\u00e3 b\u00f3c. Gi\u00e1 tr\u1ecb \u0111\u1ed9 c\u1ee9ng (HRC) \u0111\u1ea1t 64,5 v\u00e0 m\u1ed7i v\u1ecb tr\u00ed tr\u00ean m\u1eabu t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ed3ng \u0111\u1ec1u, \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u c\u1ee7a ti\u00eau chu\u1ea9n.<\/p>\n\n\n\n

B\u1ea3ng 1 Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc w\/% c\u1ee7a c\u00e1c kh\u1ed1i \u0111\u00e3 t\u00e1ch l\u1edbp<\/td><\/tr>
 <\/td>C<\/td>Si<\/td>Mn<\/td>P<\/td> S<\/td>Cr<\/td>T\u00f4i<\/td>Ni<\/td>V<\/td><\/tr>
gi\u00e1 tr\u1ecb th\u1eed nghi\u1ec7m<\/td>0.8412<\/td>0.4101<\/td>0.302<\/td>0.0094<\/td>0.0006<\/td>2.79<\/td>0.2357<\/td>0.67<\/td>0.0697<\/td><\/tr>
gi\u00e1 tr\u1ecb chu\u1ea9n<\/td>0.82-0.90<\/td>0.30-0.50<\/td>0.20-0.45<\/td>\u22640,020<\/td>\u22640,015<\/td>2.80-3.20<\/td>0.20-0.40<\/td>0.60-0.80<\/td>0.05-0.15<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Quan s\u00e1t kim lo\u1ea1i h\u1ecdc<\/strong><\/strong><\/h3>\n\n\n\n

M\u00e1y c\u1eaft d\u00e2y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1eaft c\u00e1c m\u1eabu kim lo\u1ea1i h\u1ecdc t\u1ea1i ngu\u1ed3n m\u1ecfi. Sau khi \u0111o, ngu\u1ed3n m\u1ecfi c\u00e1ch b\u1ec1 m\u1eb7t cu\u1ed9n kho\u1ea3ng 8mm. Sau khi chu\u1ea9n b\u1ecb m\u1eabu v\u00e0 \u0111\u00e1nh b\u00f3ng, k\u00ednh hi\u1ec3n vi kim lo\u1ea1i h\u1ecdc ZEISSImager.A1m, k\u00ednh hi\u1ec3n vi \u0111i\u1ec7n t\u1eed qu\u00e9t ZEISSEVO18 v\u00e0 c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 quan s\u00e1t v\u00e0 ph\u00e2n t\u00edch. Ng\u01b0\u1eddi ta th\u1ea5y r\u1eb1ng c\u00f3 nhi\u1ec1u v\u1ebft n\u1ee9t h\u00ecnh r\u1ec5 trong kh\u1ed1i \u0111\u00e3 b\u00f3c (xem H\u00ecnh 3). C\u00e1c v\u1ebft n\u1ee9t b\u1eaft ngu\u1ed3n t\u1eeb ngu\u1ed3n m\u1ecfi b\u00ean trong v\u00e0 m\u1edf r\u1ed9ng ra b\u1ec1 m\u1eb7t cu\u1ed9n.<\/p>\n\n\n\n

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H\u00ecnh 3 C\u00e1c v\u1ebft n\u1ee9t b\u00ean trong kh\u1ed1i \u0111\u00e3 b\u00f3c<\/strong><\/p>\n\n\n\n

Quan s\u00e1t to\u00e0n di\u1ec7n m\u1eabu cho th\u1ea5y c\u00f3 nhi\u1ec1u t\u1ea1p ch\u1ea5t l\u1edbn trong kh\u1ed1i \u0111\u00e3 b\u00f3c (xem H\u00ecnh 4a), v\u1edbi k\u00edch th\u01b0\u1edbc l\u00ean t\u1edbi 90 \u03bcm v\u00e0 c\u00e1c t\u1ea1p ch\u1ea5t n\u00e0y v\u01b0\u1ee3t qu\u00e1 ti\u00eau chu\u1ea9n nghi\u00eam tr\u1ecdng. S\u1eed d\u1ee5ng ph\u00e2n t\u00edch ph\u1ed5 n\u0103ng l\u01b0\u1ee3ng k\u00ednh hi\u1ec3n vi \u0111i\u1ec7n t\u1eed qu\u00e9t (xem H\u00ecnh 4b), c\u00e1c t\u1ea1p ch\u1ea5t h\u1ea1t l\u1edbn ch\u1ee7 y\u1ebfu l\u00e0 O v\u00e0 Al, v\u1edbi m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf Mg, S, Ca, Mn v\u00e0 Fe. C\u00f3 th\u1ec3 suy ra r\u1eb1ng ch\u00fang l\u00e0 t\u1ea1p ch\u1ea5t h\u1ed7n h\u1ee3p v\u1edbi Al2O3 l\u00e0 th\u00e0nh ph\u1ea7n ch\u00ednh. Nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 l\u00e0 do ki\u1ec3m so\u00e1t l\u1ecfng l\u1ebbo qu\u00e1 tr\u00ecnh n\u1ea5u ch\u1ea3y khi s\u1ea3n xu\u1ea5t cu\u1ed9n.<\/p>\n\n\n\n

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2. Ph\u00e2n t\u00edch v\u00e0 th\u1ea3o lu\u1eadn<\/strong><\/strong><\/p>\n\n\n\n

Qu\u00e1 tr\u00ecnh t\u1ea1o ra v\u1ebft n\u1ee9t<\/strong><\/strong><\/h3>\n\n\n\n

T\u1eeb ph\u00e2n t\u00edch h\u00ecnh th\u00e1i v\u0129 m\u00f4, c\u00f3 th\u1ec3 suy ra r\u1eb1ng s\u1ef1 c\u1ed1 bong tr\u00f3c cu\u1ed9n b\u1eaft ngu\u1ed3n t\u1eeb ngu\u1ed3n m\u1ecfi b\u00ean trong. Sau \u0111\u00f3, d\u01b0\u1edbi \u1ee9ng su\u1ea5t li\u00ean t\u1ee5c \u1ee9ng su\u1ea5t tu\u1ea7n ho\u00e0n trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh, c\u00e1c v\u1ebft n\u1ee9t d\u1ea7n d\u1ea7n m\u1edf r\u1ed9ng th\u00e0nh c\u00e1c \u0111\u01b0\u1eddng g\u1edd. C\u00e1c v\u1ebft n\u1ee9t m\u1ecfi m\u1edf r\u1ed9ng \u0111\u1ebfn m\u1ed9t m\u1ee9c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh, d\u1eabn \u0111\u1ebfn c\u01b0\u1eddng \u0111\u1ed9 kh\u00f4ng \u0111\u1ee7 v\u00e0 kh\u00f4ng th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c l\u1ef1c b\u00ean ngo\u00e0i trong qu\u00e1 tr\u00ecnh c\u00e1n. Cu\u1ed1i c\u00f9ng, m\u1ed9t v\u00f9ng k\u1ebft th\u00fac \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh v\u00e0 b\u1ec1 m\u1eb7t c\u1ee7a cu\u1ed9n b\u1ecb bong ra. Trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh cu\u1ed9n, \u1ee9ng su\u1ea5t c\u1eaft k\u1ebft h\u1ee3p t\u1ed1i \u0111a do t\u1ea3i tr\u1ecdng c\u1ee7a m\u00e1y c\u00e1n <\/a>v\u00e0 l\u1ef1c n\u00e9n c\u1ee5c b\u1ed9 c\u1ee7a l\u00f4 t\u1ea1i \u0111i\u1ec3m ti\u1ebfp x\u00fac n\u1eb1m \u1edf m\u1ed9t khu v\u1ef1c nh\u1ecf b\u00ean d\u01b0\u1edbi b\u1ec1 m\u1eb7t l\u00f4. Qu\u00e1 tr\u00ecnh chu\u1ea9n b\u1ecb tr\u01b0\u1edbc khi l\u00f4 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t v\u00e0 s\u1eed d\u1ee5ng s\u1ebd t\u1ea1o ra \u1ee9ng su\u1ea5t d\u01b0. \u0110\u1ed3ng th\u1eddi, m\u1eb7c d\u00f9 nhi\u1ec7t \u0111\u1ed9 gia c\u00f4ng c\u00e1n ngu\u1ed9i th\u1ea5p, nhi\u1ec7t \u0111\u1ed9 c\u1ee7a l\u00f4 v\u00e0 d\u1ea3i c\u0169ng s\u1ebd t\u0103ng l\u00ean d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a ma s\u00e1t, d\u1eabn \u0111\u1ebfn \u1ee9ng su\u1ea5t nhi\u1ec7t. N\u1ebfu d\u1ea3i b\u1ecb \u0111\u1ee9t, rung, ch\u1ed3ng ch\u00e9o, tr\u01b0\u1ee3t, v.v. x\u1ea3y ra trong qu\u00e1 tr\u00ecnh c\u00e1n, b\u1ec1 m\u1eb7t l\u00f4 s\u1ebd ph\u1ea3i ch\u1ecbu nhi\u1ec7t qu\u00e1 t\u1ea3i c\u1ee5c b\u1ed9 v\u00e0 \u1ee9ng su\u1ea5t va \u0111\u1eadp. V\u00ec t\u1ea1p ch\u1ea5t phi kim lo\u1ea1i t\u1ed3n t\u1ea1i trong th\u00e9p d\u01b0\u1edbi d\u1ea1ng h\u1ed7n h\u1ee3p c\u01a1 h\u1ecdc v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a ch\u00fang r\u1ea5t kh\u00e1c so v\u1edbi th\u00e9p, ch\u00fang ph\u00e1 h\u1ee7y t\u00ednh \u0111\u1ed3ng nh\u1ea5t v\u00e0 t\u00ednh li\u00ean t\u1ee5c c\u1ee7a ma tr\u1eadn th\u00e9p v\u00e0 g\u00e2y ra s\u1ef1 t\u1eadp trung \u1ee9ng su\u1ea5t \u1edf \u0111\u00f3, tr\u1edf th\u00e0nh ngu\u1ed3n g\u00e2y m\u1ecfi. Ngo\u00e0i ra, trong qu\u00e1 tr\u00ecnh gia nhi\u1ec7t, h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf tuy\u1ebfn t\u00ednh c\u1ee7a t\u1ea1p ch\u1ea5t phi kim lo\u1ea1i v\u00e0 ma tr\u1eadn kh\u00e1c nhau, t\u1ea1o ra m\u1ed9t tr\u01b0\u1eddng \u1ee9ng su\u1ea5t b\u1ed5 sung trong ma tr\u1eadn g\u1ea7n t\u1ea1p ch\u1ea5t. Trong \u0111i\u1ec1u ki\u1ec7n \u1ee9ng su\u1ea5t ph\u1ee9c t\u1ea1p nh\u01b0 v\u1eady, n\u1ebfu c\u00f3 t\u1ea1p ch\u1ea5t phi kim lo\u1ea1i trong l\u1edbp b\u1ec1 m\u1eb7t, \u0111\u1eb7c bi\u1ec7t l\u00e0 t\u1ea1p ch\u1ea5t gi\u00f2n, th\u00ec t\u1ea1p ch\u1ea5t h\u00ecnh c\u1ea7u tr\u01b0\u1edbc ti\u00ean s\u1ebd bong ra kh\u1ecfi ma tr\u1eadn \u1edf hai c\u1ef1c c\u1ee7a \u1ee9ng su\u1ea5t c\u1ef1c \u0111\u1ea1i, t\u1ea1o th\u00e0nh c\u00e1c v\u1ebft n\u1ee9t vi m\u00f4 ch\u00ednh. Tr\u01b0\u1edbc khi v\u1ebft n\u1ee9t lan truy\u1ec1n nhanh ch\u00f3ng, giao di\u1ec7n gi\u1eefa ma tr\u1eadn th\u00e9p v\u00e0 t\u1ea1p ch\u1ea5t d\u1ea7n t\u00e1ch ra kh\u1ecfi ma tr\u1eadn v\u00e0 t\u1ea1o th\u00e0nh m\u1ed9t k\u00eanh n\u1ee9t. Khi s\u1ed1 chu k\u1ef3 \u1ee9ng su\u1ea5t t\u0103ng l\u00ean, c\u00e1c v\u1ebft n\u1ee9t vi m\u00f4 d\u1ea7n m\u1edf r\u1ed9ng ra ngo\u00e0i d\u1ecdc theo ma tr\u1eadn r\u00e1ch v\u1ecf c\u1ee7a bi. Khi k\u00edch th\u01b0\u1edbc t\u1ed5ng th\u1ec3 c\u1ee7a v\u1ebft n\u1ee9t v\u01b0\u1ee3t qu\u00e1 k\u00edch th\u01b0\u1edbc t\u1edbi h\u1ea1n m\u00e0 con l\u0103n c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c, v\u1ebft n\u1ee9t m\u1ecfi s\u1ebd b\u01b0\u1edbc v\u00e0o giai \u0111o\u1ea1n gi\u00e3n n\u1edf kh\u00f4ng \u1ed5n \u0111\u1ecbnh v\u00e0 b\u1ec1 m\u1eb7t con l\u0103n cu\u1ed1i c\u00f9ng s\u1ebd bong ra do g\u00e3y t\u1ee9c th\u1eddi. Qu\u00e1 tr\u00ecnh bong tr\u00f3c b\u1ec1 m\u1eb7t con l\u0103n \u0111\u00e3 tr\u1ea3i qua m\u1ed9t s\u1ed1 qu\u00e1 tr\u00ecnh: b\u1eaft \u0111\u1ea7u n\u1ee9t do t\u1ea1p ch\u1ea5t \u2192 lan truy\u1ec1n v\u1ebft n\u1ee9t \u2192 bong tr\u00f3c.<\/p>\n\n\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a t\u1ea1p ch\u1ea5t \u0111\u1ebfn t\u00ednh ch\u1ea5t m\u1ecfi<\/strong><\/strong><\/h3>\n\n\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a t\u1ea1p ch\u1ea5t \u0111\u1ebfn tu\u1ed5i th\u1ecd m\u1ecfi c\u1ee7a ph\u00f4i li\u00ean quan \u0111\u1ebfn b\u1ea3n ch\u1ea5t, k\u00edch th\u01b0\u1edbc, s\u1ed1 l\u01b0\u1ee3ng v\u00e0 s\u1ef1 ph\u00e2n b\u1ed1 c\u1ee7a t\u1ea1p ch\u1ea5t. Nh\u00ecn chung, t\u1ea1p ch\u1ea5t d\u1ea1ng kh\u1ed1i ho\u1eb7c h\u00ecnh c\u1ea7u c\u1ee9ng v\u00e0 gi\u00f2n c\u00f3 li\u00ean k\u1ebft k\u00e9m v\u1edbi n\u1ec1n v\u00e0 kh\u00f4ng bi\u1ebfn d\u1ea1ng, ch\u1eb3ng h\u1ea1n nh\u01b0 TiN, Al2O3, v.v., c\u00f3 h\u1ea1i h\u01a1n t\u1ea1p ch\u1ea5t d\u1ebbo v\u00e0 k\u00e9o d\u00e0i. Khi c\u00f3 s\u1ed1 l\u01b0\u1ee3ng t\u1ea1p ch\u1ea5t l\u1edbn, ch\u00fang t\u1eadp trung v\u00e0 ph\u00e2n b\u1ed1, ho\u1eb7c ch\u00fang n\u1eb1m tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a chi ti\u1ebft ho\u1eb7c trong v\u00f9ng ch\u1ecbu \u1ee9ng su\u1ea5t cao, ch\u00fang s\u1ebd c\u00f3 t\u00e1c \u0111\u1ed9ng nghi\u00eam tr\u1ecdng nh\u1ea5t \u0111\u1ebfn tu\u1ed5i th\u1ecd m\u1ecfi. \u0110\u1ed3ng th\u1eddi, \u1ea3nh h\u01b0\u1edfng c\u1ee7a t\u1ea1p ch\u1ea5t \u0111\u1ebfn c\u00e1c t\u00ednh ch\u1ea5t m\u1ecfi c\u0169ng ph\u1ee5 thu\u1ed9c v\u00e0o c\u1ea5u tr\u00fac v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a n\u1ec1n. C\u00e1c th\u00ed nghi\u1ec7m \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng \u0111\u1ed9 b\u1ec1n m\u1ecfi c\u1ee7a th\u00e9p m\u1ec1m c\u00f3 \u00edt m\u1ed1i quan h\u1ec7 v\u1edbi t\u1ea1p ch\u1ea5t. Khi \u0111\u1ed9 b\u1ec1n c\u1ee7a th\u00e9p t\u0103ng l\u00ean, t\u00e1c \u0111\u1ed9ng c\u00f3 h\u1ea1i c\u1ee7a t\u1ea1p ch\u1ea5t ng\u00e0y c\u00e0ng tr\u1edf n\u00ean nghi\u00eam tr\u1ecdng. nghi\u00eam tr\u1ecdng. Trong c\u00e1c v\u1eadt li\u1ec7u kim lo\u1ea1i c\u00f3 \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 b\u1ec1n cao, \u1ea3nh h\u01b0\u1edfng c\u1ee7a t\u1ea1p ch\u1ea5t \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n m\u1ecfi \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t v\u1ea5n \u0111\u1ec1 n\u1ed5i c\u1ed9m. Theo d\u1eef li\u1ec7u nghi\u00ean c\u1ee9u c\u00f3 li\u00ean quan, tu\u1ed5i th\u1ecd m\u1ecfi r\u1ea5t nh\u1ea1y c\u1ea3m v\u1edbi k\u00edch th\u01b0\u1edbc c\u1ee7a t\u1ea1p ch\u1ea5t. Gi\u1ea3m k\u00edch th\u01b0\u1edbc c\u1ee7a t\u1ea1p ch\u1ea5t c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 tu\u1ed5i th\u1ecd m\u1ecfi. \u0110\u1ed1i v\u1edbi c\u00e1c ph\u00f4i c\u00f3 \u0111\u1ed9 c\u1ee9ng cao, c\u01b0\u1eddng \u0111\u1ed9 cao, k\u00edch th\u01b0\u1edbc t\u1edbi h\u1ea1n c\u1ee7a t\u1ea1p ch\u1ea5t b\u1ec1 m\u1eb7t l\u00e0 8 \u0111\u1ebfn 10 \u03bcm, gi\u1ea3m khi \u0111\u1ed9 c\u1ee9ng t\u0103ng v\u00e0 t\u0103ng khi \u0111\u1ed9 s\u00e2u t\u0103ng. N\u1ebfu t\u1ea1p ch\u1ea5t nh\u1ecf h\u01a1n k\u00edch th\u01b0\u1edbc t\u1edbi h\u1ea1n, c\u00f3 th\u1ec3 tr\u00e1nh \u0111\u01b0\u1ee3c g\u00e3y m\u1ecfi do t\u1ea1p ch\u1ea5t g\u00e2y ra v\u00e0 hi\u1ec7u su\u1ea5t m\u1ecfi s\u1ebd t\u1ed1t h\u01a1n; khi t\u1ea1p ch\u1ea5t l\u1edbn h\u01a1n k\u00edch th\u01b0\u1edbc t\u1edbi h\u1ea1n, khi k\u00edch th\u01b0\u1edbc t\u1ea1p ch\u1ea5t t\u0103ng, \u0111\u1ed9 b\u1ec1n m\u1ecfi v\u00e0 tu\u1ed5i th\u1ecd m\u1ecfi c\u1ee7a th\u00e9p gi\u1ea3m m\u1ea1nh. Theo t\u00e0i li\u1ec7u, \u0111\u1ed1i v\u1edbi th\u00e9p c\u01b0\u1eddng \u0111\u1ed9 cao, n\u1ebfu k\u00edch th\u01b0\u1edbc t\u1ea1p ch\u1ea5t gi\u1ea3m 1\/3, tu\u1ed5i th\u1ecd m\u1ecfi s\u1ebd \u0111\u01b0\u1ee3c k\u00e9o d\u00e0i g\u1ea5p 10 l\u1ea7n v\u00e0 n\u1ebfu k\u00edch th\u01b0\u1edbc t\u1ea1p ch\u1ea5t gi\u1ea3m kho\u1ea3ng m\u1ed9t n\u1eeda, tu\u1ed5i th\u1ecd m\u1ecfi s\u1ebd \u0111\u01b0\u1ee3c k\u00e9o d\u00e0i g\u1ea5p 100 l\u1ea7n. \u0110\u1ed3ng th\u1eddi, n\u1ebfu k\u00edch th\u01b0\u1edbc t\u1ea1p ch\u1ea5t gi\u1ea3m m\u1ed9t n\u1eeda, \u0111\u1ed9 b\u1ec1n m\u1ecfi c\u00f3 th\u1ec3 t\u0103ng t\u1eeb 1,12 \u0111\u1ebfn 1,15 l\u1ea7n. T\u00f3m l\u1ea1i, cu\u1ed9n ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a \u1ee9ng su\u1ea5t ph\u1ee9c t\u1ea1p trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng, g\u00e2y ra c\u00e1c ngu\u1ed3n n\u1ee9t m\u1ecfi t\u1ea1i c\u00e1c t\u1ea1p ch\u1ea5t l\u1edbn. Khi \u1ee9ng su\u1ea5t thay \u0111\u1ed5i li\u00ean t\u1ee5c, c\u00e1c v\u1ebft n\u1ee9t m\u1ecfi s\u1ebd m\u1edf r\u1ed9ng v\u00e0 t\u1ea1o ra c\u00e1c v\u1ebft n\u1ee9t th\u1ee9 c\u1ea5p, h\u00ecnh th\u00e0nh tr\u00ean b\u1ec1 m\u1eb7t g\u00e3y. C\u00e1c d\u1ea3i m\u1ecfi v\u00e0 c\u00e1c d\u1ea3i xuy\u00ean t\u00e2m. Khi k\u00edch th\u01b0\u1edbc t\u1ed5ng th\u1ec3 c\u1ee7a v\u1ebft n\u1ee9t v\u01b0\u1ee3t qu\u00e1 k\u00edch th\u01b0\u1edbc t\u1edbi h\u1ea1n, v\u1ebft n\u1ee9t m\u1ecfi s\u1ebd b\u01b0\u1edbc v\u00e0o giai \u0111o\u1ea1n gi\u00e3n n\u1edf kh\u00f4ng \u1ed5n \u0111\u1ecbnh v\u00e0 cu\u1ed1i c\u00f9ng cu\u1ed9n s\u1ebd h\u1ecfng do g\u00e3y v\u00e0 bong tr\u00f3c t\u1ee9c th\u1eddi.<\/p>\n\n\n\n

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

(1) S\u1ef1 bong tr\u00f3c b\u1ec1 m\u1eb7t c\u1ee7a qu\u00e1 tr\u00ecnh c\u00e1n ngu\u1ed9i song song cu\u1ed9n c\u00f4ng vi\u1ec7c<\/a> l\u00e0 do g\u00e3y m\u1ecfi do c\u00e1c t\u1ea1p ch\u1ea5t c\u1ee9ng v\u00e0 gi\u00f2n gi\u1ed1ng Al2O3 c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn g\u1ea7n b\u1ec1 m\u1eb7t.<\/p>\n\n\n\n

(2) T\u0103ng c\u01b0\u1eddng ph\u00e1t hi\u1ec7n c\u00e1c cu\u1ed9n. Ki\u1ec3m tra si\u00eau \u00e2m c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c khuy\u1ebft t\u1eadt b\u00ean trong, v\u00e0 c\u00e1c h\u1ea1t t\u1eeb t\u00ednh v\u00e0 d\u00f2ng \u0111i\u1ec7n xo\u00e1y c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau ho\u1eb7c k\u1ebft h\u1ee3p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng theo t\u00ecnh h\u00ecnh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a c\u00e1c cu\u1ed9n.<\/p>\n\n\n\n

(3) X\u00e2y d\u1ef1ng h\u1ec7 th\u1ed1ng s\u1eed d\u1ee5ng v\u00e0 b\u1ea3o d\u01b0\u1ee1ng l\u00f4 khoa h\u1ecdc, h\u1ee3p l\u00fd \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o l\u00e0m m\u00e1t, b\u00f4i tr\u01a1n trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng v\u00e0 ch\u1ed1ng qu\u00e1 nhi\u1ec7t.<\/p>","protected":false},"excerpt":{"rendered":"

The cold rolling roll is an important large-scale component of the cold tandem rolling unit. Its manufacturing process is relatively complex and the working environment is harsh. It is subject to friction, thermal stress, impact and other stresses. During use, it may break, peel, wear, etc., and then fail. , increase the cost of consumables […]<\/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-602","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nAnalysis on the causes of surface peeling of work rolls in cold tandem 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\/phan-tich-ve-nguyen-nhan-gay-bong-troc-be-mat-lo-can-trong-qua-trinh-can-nguoi-song-song\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Analysis on the causes of surface peeling of work rolls in cold tandem rolling\" \/>\n<meta property=\"og:description\" content=\"The cold rolling roll is an important large-scale component of the cold tandem rolling unit. Its manufacturing process is relatively complex and the working environment is harsh. It is subject to friction, thermal stress, impact and other stresses. 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