{"id":1605,"date":"2019-05-22T02:47:32","date_gmt":"2019-05-22T02:47:32","guid":{"rendered":"http:\/\/www.meetyoucarbide.com\/single-post-what-is-the-difference-between-forging-and-rolling\/"},"modified":"2020-05-04T13:12:08","modified_gmt":"2020-05-04T13:12:08","slug":"what-is-the-difference-between-forging-and-rolling","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/su-khac-biet-giua-ren-va-lan-la-gi\/","title":{"rendered":"S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa r\u00e8n v\u00e0 c\u00e1n l\u00e0 g\u00ec?"},"content":{"rendered":"
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C\u00e1n l\u00e0 g\u00ec?<\/h2>\n
C\u00e1n l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd trong \u0111\u00f3 ph\u00f4i kim lo\u1ea1i \u0111i qua khe h\u1edf (h\u00ecnh d\u1ea1ng kh\u00e1c nhau) c\u1ee7a m\u1ed9t c\u1eb7p cu\u1ed9n quay, v\u00e0 ti\u1ebft di\u1ec7n v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c gi\u1ea3m v\u00e0 chi\u1ec1u d\u00e0i \u0111\u01b0\u1ee3c t\u0103ng l\u00ean do l\u1ef1c n\u00e9n c\u1ee7a cu\u1ed9n. \u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p s\u1ea3n xu\u1ea5t ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ec3 s\u1ea3n xu\u1ea5t th\u00e9p, v\u00e0 ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t. H\u1ed3 s\u01a1, t\u1ea5m, \u1ed1ng.<\/div>\n

\"\"<\/p>\n

\u01afu \u0111i\u1ec3m c\u1ee7a c\u00e1n<\/h2>\n
C\u1ea5u tr\u00fac \u0111\u00fac c\u1ee7a th\u1ecfi c\u00f3 th\u1ec3 b\u1ecb ph\u00e1 h\u1ee7y b\u1edfi n\u00f3. B\u00ean c\u1ea1nh \u0111\u00f3, h\u1ea1t c\u1ee7a th\u00e9p c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tinh ch\u1ebf, v\u00e0 c\u00e1c khuy\u1ebft t\u1eadt c\u1ee7a c\u1ea5u tr\u00fac vi m\u00f4 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf. do \u0111\u00f3 k\u1ebft c\u1ea5u th\u00e9p \u0111\u01b0\u1ee3c n\u00e9n ch\u1eb7t v\u00e0 c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n. S\u1ef1 c\u1ea3i ti\u1ebfn n\u00e0y ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c ph\u1ea3n \u00e1nh theo h\u01b0\u1edbng c\u00e1n, do \u0111\u00f3 th\u00e9p kh\u00f4ng c\u00f2n \u0111\u1eb3ng h\u01b0\u1edbng \u0111\u1ebfn m\u1ed9t m\u1ee9c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh, bong b\u00f3ng, v\u1ebft n\u1ee9t. S\u1ef1 l\u1ecfng l\u1ebbo h\u00ecnh th\u00e0nh trong qu\u00e1 tr\u00ecnh \u0111\u00fac c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c h\u00e0n d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u00e1p su\u1ea5t cao.<\/div>\n
Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a c\u00e1n<\/div>\n
1. Sau khi c\u00e1n, c\u00e1c v\u00f9i kh\u00f4ng kim lo\u1ea1i (ch\u1ee7 y\u1ebfu l\u00e0 sunfua v\u00e0 oxit, c\u0169ng nh\u01b0 silicat) b\u00ean trong th\u00e9p \u0111\u01b0\u1ee3c \u00e9p th\u00e0nh t\u1ea5m m\u1ecfng, g\u00e2y ra s\u1ef1 ph\u00e2n t\u00e1ch (b\u00e1nh sandwich). S\u1ef1 ph\u00e2n t\u00e1ch l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 c\u00e1c \u0111\u1eb7c t\u00ednh k\u00e9o c\u1ee7a th\u00e9p theo h\u01b0\u1edbng \u0111\u1ed9 d\u00e0y, v\u00e0 c\u00f3 th\u1ec3 x\u1ea3y ra s\u1ef1 x\u00e9 r\u00e1ch interlaminar khi m\u1ed1i h\u00e0n b\u1ecb co l\u1ea1i. Bi\u1ebfn d\u1ea1ng c\u1ee5c b\u1ed9 g\u00e2y ra b\u1edfi s\u1ef1 co ng\u00f3t c\u1ee7a m\u1ed1i h\u00e0n th\u01b0\u1eddng \u0111\u1ea1t \u0111\u1ebfn nhi\u1ec1u l\u1ea7n bi\u1ebfn d\u1ea1ng \u0111i\u1ec3m n\u0103ng su\u1ea5t v\u00e0 l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi bi\u1ebfn d\u1ea1ng g\u00e2y ra b\u1edfi t\u1ea3i.<\/div>\n
2. \u1ee8ng su\u1ea5t d\u01b0 do l\u00e0m m\u00e1t kh\u00f4ng \u0111\u1ec1u. \u1ee8ng su\u1ea5t d\u01b0 l\u00e0 \u1ee9ng su\u1ea5t c\u00e2n b\u1eb1ng t\u1ef1 pha b\u00ean trong m\u00e0 kh\u00f4ng c\u1ea7n ngo\u1ea1i l\u1ef1c. Th\u00e9p c\u00e1n n\u00f3ng c\u1ee7a c\u00e1c ph\u1ea7n kh\u00e1c nhau c\u00f3 \u1ee9ng su\u1ea5t d\u01b0 nh\u01b0 v\u1eady. K\u00edch th\u01b0\u1edbc ti\u1ebft di\u1ec7n c\u1ee7a th\u00e9p n\u00f3i chung c\u00e0ng l\u1edbn th\u00ec \u1ee9ng su\u1ea5t d\u01b0 c\u00e0ng l\u1edbn. M\u1eb7c d\u00f9 \u1ee9ng su\u1ea5t d\u01b0 l\u00e0 t\u1ef1 c\u00e2n b\u1eb1ng pha, nh\u01b0ng n\u00f3 v\u1eabn c\u00f3 m\u1ed9t s\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c th\u00e0nh vi\u00ean th\u00e9p d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng b\u00ean ngo\u00e0i. Ch\u1eb3ng h\u1ea1n nh\u01b0 bi\u1ebfn d\u1ea1ng, \u1ed5n \u0111\u1ecbnh, m\u1ec7t m\u1ecfi v\u00e0 c\u00e1c kh\u00eda c\u1ea1nh kh\u00e1c c\u00f3 th\u1ec3 c\u00f3 t\u00e1c d\u1ee5ng ph\u1ee5.<\/div>\n
3. S\u1ea3n ph\u1ea9m th\u00e9p c\u00e1n n\u00f3ng kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t t\u1ed1t v\u1ec1 \u0111\u1ed9 d\u00e0y v\u00e0 chi\u1ec1u r\u1ed9ng m\u1eb7t. Ch\u00fang t\u00f4i \u0111\u00e3 quen thu\u1ed9c v\u1edbi s\u1ef1 gi\u00e3n n\u1edf nhi\u1ec7t v\u00e0 co l\u1ea1i. V\u00ec c\u00e1n n\u00f3ng \u0111\u01b0\u1ee3c b\u1eaft \u0111\u1ea7u ngay t\u1eeb \u0111\u1ea7u ngay c\u1ea3 khi chi\u1ec1u d\u00e0i v\u00e0 \u0111\u1ed9 d\u00e0y \u0111\u1ea1t ti\u00eau chu\u1ea9n, s\u1ebd c\u00f3 m\u1ed9t s\u1ef1 kh\u00e1c bi\u1ec7t ti\u00eau c\u1ef1c nh\u1ea5t \u0111\u1ecbnh sau khi l\u00e0m m\u00e1t. Chi\u1ec1u r\u1ed9ng c\u1ee7a ch\u00eanh l\u1ec7ch \u00e2m c\u00e0ng r\u1ed9ng th\u00ec \u0111\u1ed9 d\u00e0y c\u00e0ng d\u00e0y. Do \u0111\u00f3, \u0111\u1ed1i v\u1edbi th\u00e9p l\u1edbn, chi\u1ec1u r\u1ed9ng, chi\u1ec1u d\u00e0y, chi\u1ec1u d\u00e0i, g\u00f3c v\u00e0 c\u1ea1nh c\u1ee7a th\u00e9p kh\u00f4ng th\u1ec3 qu\u00e1 ch\u00ednh x\u00e1c.<\/div>\n

R\u00e8n l\u00e0 g\u00ec?<\/h2>\n
\u0110\u00e2y l\u00e0 m\u1ed9t trong hai th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a r\u00e8n (r\u00e8n v\u00e0 d\u1eadp) b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u00e1y r\u00e8n \u0111\u1ec3 t\u1ea1o \u00e1p l\u1ef1c l\u00ean ph\u00f4i kim lo\u1ea1i l\u00e0m bi\u1ebfn d\u1ea1ng d\u1ebbo \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c m\u1ed9t v\u1eadt r\u00e8n c\u00f3 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc nh\u1ea5t \u0111\u1ecbnh, h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc nh\u1ea5t \u0111\u1ecbnh. Th\u00f4ng qua vi\u1ec7c r\u00e8n c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf c\u00e1c khuy\u1ebft t\u1eadt nh\u01b0 s\u1ef1 l\u1ecfng l\u1ebbo do \u0111\u00fac kim lo\u1ea1i g\u00e2y ra trong qu\u00e1 tr\u00ecnh luy\u1ec7n kim, t\u1ed1i \u01b0u h\u00f3a c\u1ea5u tr\u00fac vi m\u00f4, \u0111\u1ed3ng th\u1eddi, c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a v\u1eadt r\u00e8n th\u01b0\u1eddng t\u1ed1t h\u01a1n so v\u1edbi c\u00e1c v\u1eadt li\u1ec7u t\u01b0\u01a1ng t\u1ef1 do b\u1ea3o qu\u1ea3n d\u00f2ng ch\u1ea3y kim lo\u1ea1i ho\u00e0n ch\u1ec9nh. \u0110\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn quan tr\u1ecdng c\u1ee7a m\u00e1y m\u00f3c c\u00f3 li\u00ean quan v\u1edbi t\u1ea3i tr\u1ecdng cao v\u00e0 \u0111i\u1ec1u ki\u1ec7n l\u00e0m vi\u1ec7c kh\u1eafc nghi\u1ec7t, v\u1eadt r\u00e8n th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ngo\u1ea1i tr\u1eeb c\u00e1c t\u1ea5m cu\u1ed9n, h\u1ed3 s\u01a1 ho\u1eb7c c\u00e1c b\u1ed9 ph\u1eadn h\u00e0n c\u00f3 s\u1eb5n.<\/div>\n
C\u00e1c t\u00ednh n\u0103ng c\u1ee7a r\u00e8n:<\/div>\n
So v\u1edbi v\u1eadt \u0111\u00fac, r\u00e8n kim lo\u1ea1i c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n c\u1ea5u tr\u00fac vi m\u00f4 v\u00e0 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a ch\u00fang sau khi r\u00e8n. Sau khi bi\u1ebfn d\u1ea1ng h\u00ecnh th\u00e0nh c\u1ea5u tr\u00fac \u0111\u00fac n\u00f3ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p r\u00e8n, c\u00e1c s\u1ee3i nh\u00e1nh v\u00e0 h\u1ea1t c\u1ed9t th\u00f4 ban \u0111\u1ea7u tr\u1edf th\u00e0nh c\u1ea5u tr\u00fac k\u1ebft tinh l\u1ea1i v\u1edbi c\u00e1c h\u1ea1t m\u1ecbn v\u00e0 k\u00edch th\u01b0\u1edbc \u0111\u1ed3ng nh\u1ea5t do s\u1ef1 bi\u1ebfn d\u1ea1ng v\u00e0 k\u1ebft tinh l\u1ea1i c\u1ee7a kim lo\u1ea1i, do \u0111\u00f3 s\u1ef1 ph\u00e2n t\u00e1ch ban \u0111\u1ea7u trong kim lo\u1ea1i ph\u00f4i th\u00e9p, Vi\u1ec7c n\u00e9n v\u00e0 h\u00e0n c\u00e1c v\u00f9i l\u1ecfng, kh\u00ed kh\u1ed5ng v\u00e0 x\u1ec9 l\u00e0m cho c\u1ea5u tr\u00fac nh\u1ecf g\u1ecdn h\u01a1n v\u00e0 c\u1ea3i thi\u1ec7n t\u00ednh d\u1ebbo v\u00e0 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a kim lo\u1ea1i.<\/div>\n
C\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a v\u1eadt \u0111\u00fac th\u1ea5p h\u01a1n so v\u1edbi v\u1eadt li\u1ec7u r\u00e8n c\u1ee7a c\u00f9ng m\u1ed9t v\u1eadt li\u1ec7u. Ngo\u00e0i ra, qu\u00e1 tr\u00ecnh r\u00e8n c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh li\u00ean t\u1ee5c c\u1ee7a c\u1ea5u tr\u00fac s\u1ee3i kim lo\u1ea1i, do \u0111\u00f3 c\u1ea5u tr\u00fac s\u1ee3i c\u1ee7a m\u1ea3nh r\u00e8n ph\u00f9 h\u1ee3p v\u1edbi h\u00ecnh d\u1ea1ng c\u1ee7a m\u1ea3nh r\u00e8n, v\u00e0 d\u00f2ng ch\u1ea3y kim lo\u1ea1i ho\u00e0n ch\u1ec9nh, c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc t\u1ed1t v\u00e0 tu\u1ed5i th\u1ecd d\u00e0i c\u1ee7a b\u1ed9 ph\u1eadn b\u1eb1ng c\u00e1ch r\u00e8n ch\u1ebft ch\u00ednh x\u00e1c v\u00e0 \u0111\u00f9n l\u1ea1nh. R\u00e8n \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1edfi c\u00e1c qu\u00e1 tr\u00ecnh nh\u01b0 \u0111\u00f9n \u1ea5m l\u00e0 kh\u00f4ng th\u1ec3 so s\u00e1nh v\u1edbi v\u1eadt \u0111\u00fac.<\/div>\n

So s\u00e1nh ph\u00f4i r\u00e8n v\u00e0 ph\u00f4i c\u00e1n:<\/h2>\n
a. S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc h\u01b0\u1edbng tr\u1ee5c v\u00e0 h\u01b0\u1edbng t\u00e2m c\u1ee7a v\u1eadt r\u00e8n nh\u1ecf h\u01a1n so v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn c\u00e1n. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0, \u0111\u1eb3ng h\u01b0\u1edbng c\u1ee7a c\u00e1c v\u1eadt r\u00e8n cao h\u01a1n nhi\u1ec1u so v\u1edbi \u0111\u1eb3ng h\u01b0\u1edbng c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn cu\u1ed9n, v\u00ec v\u1eady tu\u1ed5i th\u1ecd c\u1ee7a c\u00e1c v\u1eadt r\u00e8n cao h\u01a1n nhi\u1ec1u so v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn c\u00e1n. Ph\u1ea7n c\u00e1n. H\u00ecnh d\u01b0\u1edbi \u0111\u00e2y cho th\u1ea5y s\u01a1 \u0111\u1ed3 kim lo\u1ea1i v\u1ec1 h\u00ecnh th\u00e1i c\u1ee7a cacbua eutectic theo c\u00e1c h\u01b0\u1edbng kh\u00e1c nhau c\u1ee7a t\u1ea5m cu\u1ed9n Cr12MoV.<\/div>\n
b. T\u1eeb m\u1ee9c \u0111\u1ed9 bi\u1ebfn d\u1ea1ng, m\u1ee9c \u0111\u1ed9 bi\u1ebfn d\u1ea1ng c\u1ee7a r\u00e8n l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi m\u1ee9c \u0111\u1ed9 bi\u1ebfn d\u1ea1ng c\u1ee7a mi\u1ebfng c\u00e1n, ngh\u0129a l\u00e0, hi\u1ec7u qu\u1ea3 ph\u00e1 v\u1ee1 cacbua eutectic b\u1eb1ng c\u00e1ch r\u00e8n t\u1ed1t h\u01a1n hi\u1ec7u \u1ee9ng nghi\u1ec1n c\u1ee7a c\u00e1n.<\/div>\n
c. V\u1ec1 chi ph\u00ed gia c\u00f4ng, chi ph\u00ed r\u00e8n cao h\u01a1n nhi\u1ec1u so v\u1edbi chi ph\u00ed c\u00e1n. \u0110\u1ed1i v\u1edbi m\u1ed9t s\u1ed1 b\u1ed9 ph\u1eadn ch\u00ednh, ph\u00f4i ph\u1ea3i ch\u1ecbu t\u1ea3i tr\u1ecdng l\u1edbn ho\u1eb7c t\u00e1c \u0111\u1ed9ng, ph\u00f4i c\u00f3 h\u00ecnh d\u1ea1ng ph\u1ee9c t\u1ea1p ho\u1eb7c y\u00eau c\u1ea7u r\u1ea5t nghi\u00eam ng\u1eb7t, c\u1ea7n ph\u1ea3i s\u1eed d\u1ee5ng Quy tr\u00ecnh gi\u1ea3 m\u1ea1o \u0111\u1ec3 x\u1eed l\u00fd.<\/div>\n
d. Vi\u1ec7c r\u00e8n c\u00f3 m\u1ed9t d\u00f2ng kim lo\u1ea1i ho\u00e0n ch\u1ec9nh. Sau khi c\u00e1n, c\u01a1 h\u1ecdc ph\u00e1 h\u1ee7y t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u00f2ng kim lo\u1ea1i, gi\u00fap r\u00fat ng\u1eafn \u0111\u00e1ng k\u1ec3 tu\u1ed5i th\u1ecd c\u1ee7a ph\u00f4i. H\u00ecnh d\u01b0\u1edbi \u0111\u00e2y cho th\u1ea5y c\u00e1c d\u00f2ng ch\u1ea3y kim lo\u1ea1i \u0111\u1ec3 \u0111\u00fac, gia c\u00f4ng v\u00e0 r\u00e8n ph\u00f4i.<\/div>\n<\/div>\n<\/div>\n

<\/p>","protected":false},"excerpt":{"rendered":"

What is rolling? Rolling is a processing method in which the metal blank passes through the gap (various shapes) of a pair of rotating rolls, and the material cross section is reduced and the length is increased by the compression of the rolls. It is the most common production method for producing steel, and is…<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[79],"tags":[],"class_list":["post-1605","post","type-post","status-publish","format-standard","hentry","category-materials-weekly"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/1605","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/comments?post=1605"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/1605\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=1605"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=1605"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=1605"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}