{"id":13665,"date":"2019-09-05T03:33:02","date_gmt":"2019-09-05T03:33:02","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=13665"},"modified":"2020-05-07T01:17:01","modified_gmt":"2020-05-07T01:17:01","slug":"characteristics-and-differences-of-quenching-crack-and-forging-crack","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/characteristics-and-differences-of-quenching-crack-and-forging-crack\/","title":{"rendered":"\u0110\u1eb6C \u0110I\u1ec2M V\u00c0 KH\u00c1C BI\u1ec6T C\u1ee6A CRACK QUENCHING V\u00c0 FORGING CRACK"},"content":{"rendered":"
\n

V\u1ebft n\u1ee9t d\u1eadp t\u1eaft l\u00e0 m\u1ed9t khuy\u1ebft t\u1eadt d\u1eadp t\u1eaft ph\u1ed5 bi\u1ebfn, do nhi\u1ec1u y\u1ebfu t\u1ed1 g\u00e2y ra. B\u1edfi v\u00ec c\u00e1c khuy\u1ebft t\u1eadt c\u1ee7a qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t b\u1eaft \u0111\u1ea7u t\u1eeb thi\u1ebft k\u1ebf s\u1ea3n ph\u1ea9m, c\u00f4ng vi\u1ec7c ng\u0103n ng\u1eeba c\u00e1c v\u1ebft n\u1ee9t n\u00ean b\u1eaft \u0111\u1ea7u t\u1eeb thi\u1ebft k\u1ebf s\u1ea3n ph\u1ea9m. Ph\u1ea3i l\u1ef1a ch\u1ecdn \u0111\u00fang v\u1eadt li\u1ec7u v\u00e0 thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u h\u1ee3p l\u00fd, \u0111\u01b0a ra c\u00e1c y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt nhi\u1ec7t luy\u1ec7n ph\u00f9 h\u1ee3p, b\u1ed1 tr\u00ed \u0111\u00fang tuy\u1ebfn c\u00f4ng ngh\u1ec7, ch\u1ecdn nhi\u1ec7t \u0111\u1ed9 gia nhi\u1ec7t h\u1ee3p l\u00fd, th\u1eddi gian gi\u1eef nhi\u1ec7t, m\u00f4i ch\u1ea5t gia nhi\u1ec7t, m\u00f4i ch\u1ea5t l\u00e0m ngu\u1ed9i, ph\u01b0\u01a1ng ph\u00e1p l\u00e0m ngu\u1ed9i v\u00e0 ch\u1ebf \u0111\u1ed9 v\u1eadn h\u00e0nh, v.v.<\/p>\n\n\n\n

Kh\u00eda c\u1ea1nh v\u1eadt ch\u1ea5t<\/h2>\n\n\n\n

1. Carbon l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn xu h\u01b0\u1edbng d\u1eadp t\u1eaft. V\u1edbi s\u1ef1 gia t\u0103ng c\u1ee7a h\u00e0m l\u01b0\u1ee3ng carbon, \u0111i\u1ec3m MS gi\u1ea3m v\u00e0 xu h\u01b0\u1edbng d\u1eadp t\u1eaft t\u0103ng l\u00ean. V\u00ec v\u1eady, trong \u0111i\u1ec1u ki\u1ec7n th\u1ecfa m\u00e3n c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 b\u1ea3n nh\u01b0 \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 b\u1ec1n, h\u00e0m l\u01b0\u1ee3ng cacbon th\u1ea5p h\u01a1n n\u00ean \u0111\u01b0\u1ee3c ch\u1ecdn c\u00e0ng xa c\u00e0ng t\u1ed1t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng n\u00f3 kh\u00f4ng d\u1ec5 b\u1ecb d\u1eadp t\u1eaft.<\/p>\n\n\n\n

2. \u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u00e1c nguy\u00ean t\u1ed1 h\u1ee3p kim \u0111\u1ebfn xu h\u01b0\u1edbng d\u1eadp t\u1eaft ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c ph\u1ea3n \u00e1nh trong \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 c\u1ee9ng, \u0111i\u1ec3m MS, xu h\u01b0\u1edbng t\u0103ng tr\u01b0\u1edfng k\u00edch th\u01b0\u1edbc h\u1ea1t v\u00e0 qu\u00e1 tr\u00ecnh kh\u1eed cacbon. C\u00e1c nguy\u00ean t\u1ed1 h\u1ee3p kim \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn xu h\u01b0\u1edbng d\u1eadp t\u1eaft b\u1eb1ng c\u00e1ch \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 c\u1ee9ng. N\u00f3i chung, \u0111\u1ed9 c\u1ee9ng t\u0103ng l\u00ean v\u00e0 kh\u1ea3 n\u0103ng n\u1ee9t t\u0103ng, nh\u01b0ng khi \u0111\u1ed9 c\u1ee9ng t\u0103ng l\u00ean, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u00f4i tr\u01b0\u1eddng d\u1eadp t\u1eaft c\u00f3 kh\u1ea3 n\u0103ng l\u00e0m ngu\u1ed9i y\u1ebfu \u0111\u1ec3 gi\u1ea3m bi\u1ebfn d\u1ea1ng d\u1eadp t\u1eaft nh\u1eb1m ng\u0103n ch\u1eb7n s\u1ef1 bi\u1ebfn d\u1ea1ng v\u00e0 n\u1ee9t c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn ph\u1ee9c t\u1ea1p. Do \u0111\u00f3, \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn ph\u1ee9c t\u1ea1p, \u0111\u1ec3 tr\u00e1nh l\u00e0m ngu\u1ed9i c\u00e1c v\u1ebft n\u1ee9t, ph\u01b0\u01a1ng \u00e1n t\u1ed1t h\u01a1n l\u00e0 ch\u1ecdn th\u00e9p c\u00f3 \u0111\u1ed9 c\u1ee9ng t\u1ed1t v\u00e0 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ti\u1ec7n l\u00e0m ngu\u1ed9i c\u00f3 kh\u1ea3 n\u0103ng l\u00e0m ngu\u1ed9i y\u1ebfu.<\/p>\n\n\n\n

N\u00f3i chung, MS c\u00e0ng th\u1ea5p, xu h\u01b0\u1edbng d\u1eadp t\u1eaft c\u00e0ng l\u1edbn. Khi \u0111i\u1ec3m MS cao, mactenxit h\u00ecnh th\u00e0nh do bi\u1ebfn \u0111\u1ed5i c\u00f3 th\u1ec3 t\u1ef1 t\u00f4i luy\u1ec7n ngay l\u1eadp t\u1ee9c, do \u0111\u00f3 lo\u1ea1i b\u1ecf m\u1ed9t ph\u1ea7n \u1ee9ng su\u1ea5t bi\u1ebfn \u0111\u1ed5i v\u00e0 tr\u00e1nh x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng d\u1eadp t\u1eaft. Do \u0111\u00f3, khi x\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng cacbon, n\u00ean ch\u1ecdn m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf c\u00e1c nguy\u00ean t\u1ed1 h\u1ee3p kim, ho\u1eb7c ch\u1ecdn c\u00e1c lo\u1ea1i th\u00e9p c\u00f3 ch\u1ee9a c\u00e1c nguy\u00ean t\u1ed1 \u00edt \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111i\u1ec3m MS.<\/p>\n\n\n\n

3. \u0110\u1ed9 nh\u1ea1y qu\u00e1 nhi\u1ec7t c\u1ea7n \u0111\u01b0\u1ee3c xem x\u00e9t khi ch\u1ecdn th\u00e9p. Th\u00e9p nh\u1ea1y c\u1ea3m qu\u00e1 nhi\u1ec7t d\u1ec5 b\u1ecb n\u1ee9t, v\u00ec v\u1eady c\u1ea7n ch\u00fa \u00fd \u0111\u1ebfn vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u.<\/p>\n\n\n\n

Thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn<\/h2>\n\n\n\n

1. K\u00edch th\u01b0\u1edbc m\u1eb7t c\u1eaft \u0111\u1ed3ng nh\u1ea5t.<\/p>\n\n\n\n

C\u00e1c v\u1ebft n\u1ee9t x\u1ea3y ra \u1edf c\u00e1c b\u1ed9 ph\u1eadn c\u00f3 k\u00edch th\u01b0\u1edbc ti\u1ebft di\u1ec7n thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 do \u1ee9ng su\u1ea5t b\u00ean trong trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t. Do \u0111\u00f3, c\u1ea7n tr\u00e1nh s\u1ef1 thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t c\u1ee7a k\u00edch th\u01b0\u1edbc m\u1eb7t c\u1eaft trong thi\u1ebft k\u1ebf. \u0110\u1ed9 d\u00e0y c\u1ee7a t\u01b0\u1eddng ph\u1ea3i \u0111\u1ed3ng \u0111\u1ec1u. N\u1ebfu c\u1ea7n, c\u00e1c l\u1ed7 h\u1edf c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o ra \u1edf c\u00e1c b\u1ed9 ph\u1eadn c\u00f3 t\u01b0\u1eddng d\u00e0y kh\u00f4ng li\u00ean quan tr\u1ef1c ti\u1ebfp \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng. C\u00e1c l\u1ed7 ph\u1ea3i \u0111\u01b0\u1ee3c l\u00e0m th\u00f4ng qua c\u00e0ng nhi\u1ec1u c\u00e0ng t\u1ed1t. \u0110\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn c\u00f3 \u0111\u1ed9 d\u00e0y kh\u00e1c nhau, c\u00f3 th\u1ec3 ti\u1ebfn h\u00e0nh thi\u1ebft k\u1ebf ri\u00eang bi\u1ec7t, sau \u0111\u00f3 l\u1eafp r\u00e1p sau khi x\u1eed l\u00fd nhi\u1ec7t.<\/p>\n\n\n\n

2. Chuy\u1ec3n ti\u1ebfp g\u00f3c tr\u00f2n.<\/p>\n\n\n\n

Khi c\u00e1c chi ti\u1ebft c\u00f3 c\u1ea1nh, g\u00f3c s\u1eafc, r\u00e3nh v\u00e0 l\u1ed7 ngang, c\u00e1c chi ti\u1ebft n\u00e0y d\u1ec5 b\u1ecb t\u1eadp trung \u1ee9ng su\u1ea5t, d\u1eabn \u0111\u1ebfn d\u1eadp t\u1eaft c\u00e1c chi ti\u1ebft. V\u00ec l\u00fd do n\u00e0y, c\u00e1c b\u1ed9 ph\u1eadn n\u00ean \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf c\u00e0ng xa c\u00e0ng t\u1ed1t \u0111\u1ec3 tr\u00e1nh s\u1ef1 t\u1eadp trung \u1ee9ng su\u1ea5t, v\u00e0 \u0111\u01b0\u1ee3c x\u1eed l\u00fd th\u00e0nh c\u00e1c g\u00f3c bo tr\u00f2n \u1edf c\u00e1c g\u00f3c v\u00e0 b\u1eadc nh\u1ecdn.<\/p>\n\n\n\n

3. S\u1ef1 kh\u00e1c bi\u1ec7t c\u1ee7a t\u1ed1c \u0111\u1ed9 l\u00e0m m\u00e1t do y\u1ebfu t\u1ed1 h\u00ecnh d\u1ea1ng g\u00e2y ra.<\/p>\n\n\n\n

T\u1ed1c \u0111\u1ed9 l\u00e0m m\u00e1t c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn trong qu\u00e1 tr\u00ecnh l\u00e0m ngu\u1ed9i thay \u0111\u1ed5i theo h\u00ecnh d\u1ea1ng c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn. Ngay c\u1ea3 \u1edf c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c nhau c\u1ee7a c\u00f9ng m\u1ed9t b\u1ed9 ph\u1eadn, t\u1ed1c \u0111\u1ed9 l\u00e0m m\u00e1t c\u0169ng kh\u00e1c nhau do c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c nhau. Do \u0111\u00f3, n\u00ean tr\u00e1nh s\u1ef1 ch\u00eanh l\u1ec7ch l\u00e0m m\u00e1t qu\u00e1 m\u1ee9c \u0111\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c v\u1ebft n\u1ee9t d\u1eadp t\u1eaft.<\/p>\n\n\n\n

\u0110i\u1ec1u ki\u1ec7n k\u1ef9 thu\u1eadt \u0111\u1ec3 x\u1eed l\u00fd nhi\u1ec7t<\/h2>\n\n\n\n

1. S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p l\u00e0m ngu\u1ed9i c\u1ee5c b\u1ed9 ho\u1eb7c l\u00e0m c\u1ee9ng b\u1ec1 m\u1eb7t c\u00e0ng nhi\u1ec1u c\u00e0ng t\u1ed1t.<\/p>\n\n\n\n

2. \u0110i\u1ec1u ch\u1ec9nh h\u1ee3p l\u00fd \u0111\u1ed9 c\u1ee9ng c\u1ee5c b\u1ed9 c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c l\u00e0m ngu\u1ed9i theo y\u00eau c\u1ea7u v\u1ec1 \u0111i\u1ec1u ki\u1ec7n b\u1ea3o d\u01b0\u1ee1ng c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn. Khi y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 c\u1ee9ng d\u1eadp t\u1eaft c\u1ee5c b\u1ed9 th\u1ea5p, c\u1ed1 g\u1eafng kh\u00f4ng \u00e9p \u0111\u1ed9 c\u1ee9ng t\u1ed5ng th\u1ec3 gi\u1ed1ng nhau.<\/p>\n\n\n\n

3. Ch\u00fa \u00fd \u0111\u1ebfn \u1ea3nh h\u01b0\u1edfng ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a th\u00e9p.<\/p>\n\n\n\n

4. Tr\u00e1nh \u1ee7 \u1edf ki\u1ec3u \u1ee7 \u0111\u1ea7u ti\u00ean c\u1ee7a v\u00f9ng gi\u00f2n.<\/p>\n\n\n\n

5. S\u1eafp x\u1ebfp h\u1ee3p l\u00fd l\u1ed9 tr\u00ecnh quy tr\u00ecnh v\u00e0 c\u00e1c th\u00f4ng s\u1ed1 quy tr\u00ecnh: Sau khi x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c v\u1eadt li\u1ec7u, c\u1ea5u tr\u00fac v\u00e0 \u0111i\u1ec1u ki\u1ec7n k\u1ef9 thu\u1eadt c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn th\u00e9p, c\u00e1c k\u1ef9 thu\u1eadt vi\u00ean nhi\u1ec7t luy\u1ec7n s\u1ebd ti\u1ebfn h\u00e0nh ph\u00e2n t\u00edch quy tr\u00ecnh \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh l\u1ed9 tr\u00ecnh quy tr\u00ecnh h\u1ee3p l\u00fd, ngh\u0129a l\u00e0 b\u1ed1 tr\u00ed ch\u00ednh x\u00e1c v\u1ecb tr\u00ed c\u1ee7a chu\u1ea9n b\u1ecb x\u1eed l\u00fd nhi\u1ec7t, x\u1eed l\u00fd l\u1ea1nh v\u00e0 x\u1eed l\u00fd n\u00f3ng v\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c th\u00f4ng s\u1ed1 gia nhi\u1ec7t.<\/p>\n\n\n\n

Quenching Crack<\/h2>\n\n\n\n

\u1ede 1.500X, v\u1ebft n\u1ee9t c\u00f3 h\u00ecnh r\u0103ng c\u01b0a, v\u1ebft n\u1ee9t \u1edf \u0111\u1ea7u r\u1ed9ng v\u00e0 c\u00e1c \u0111\u01b0\u1eddng \u0111\u1ee9t g\u00e3y \u1edf cu\u1ed1i nh\u1ecf v\u00e0 kh\u00f4ng c\u00f3.<\/strong><\/p>\n\n\n\n

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

2. Ph\u00e2n t\u00edch vi th\u1ec3: t\u1ea1p ch\u1ea5t luy\u1ec7n kim b\u1ea5t th\u01b0\u1eddng, h\u00ecnh th\u00e1i v\u1ebft n\u1ee9t l\u00e0 ngo\u1eb1n ngo\u00e8o k\u00e9o d\u00e0i; Sau khi \u0103n m\u00f2n b\u1eb1ng r\u01b0\u1ee3u axit nitric 4%, kh\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng kh\u1eed cacbon, h\u00ecnh th\u00e1i hi\u1ec3n vi nh\u01b0 h\u00ecnh sau:<\/strong><\/p>\n\n\n\n

\"hi\u1ec7n<\/figure>\n\n\n\n

1 M\u1eabu #<\/strong><\/strong><\/p>\n\n\n\n

Kh\u00f4ng t\u00ecm th\u1ea5y t\u1ea1p ch\u1ea5t luy\u1ec7n kim b\u1ea5t th\u01b0\u1eddng v\u00e0 kh\u1eed cacbon trong c\u00e1c v\u1ebft n\u1ee9t. C\u00e1c v\u1ebft n\u1ee9t k\u00e9o d\u00e0i theo h\u00ecnh d\u1ea1ng ngo\u1eb1n ngo\u00e8o v\u00e0 c\u00f3 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m \u0111i\u1ec3n h\u00ecnh c\u1ee7a vi\u1ec7c d\u1eadp t\u1eaft c\u00e1c v\u1ebft n\u1ee9t.<\/strong><\/strong><\/p>\n\n\n\n

\"d\u1eadp<\/figure>\n\n\n\n

2 m\u1eabu #<\/strong><\/strong><\/p>\n\n\n\n

K\u1ebft lu\u1eadn ph\u00e2n t\u00edch:<\/strong><\/strong><\/p>\n\n\n\n

1. Th\u00e0nh ph\u1ea7n c\u1ee7a m\u1eabu \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u c\u1ee7a ti\u00eau chu\u1ea9n v\u00e0 t\u01b0\u01a1ng \u1ee9ng v\u1edbi s\u1ed1 hi\u1ec7u l\u00f2 ban \u0111\u1ea7u.<\/strong><\/strong><\/p>\n\n\n\n

2. Theo ph\u00e2n t\u00edch b\u1eb1ng k\u00ednh hi\u1ec3n vi, kh\u00f4ng t\u00ecm th\u1ea5y t\u1ea1p ch\u1ea5t luy\u1ec7n kim b\u1ea5t th\u01b0\u1eddng v\u00e0 kh\u1eed cacbon t\u1ea1i c\u00e1c v\u1ebft n\u1ee9t c\u1ee7a m\u1eabu. C\u00e1c v\u1ebft n\u1ee9t k\u00e9o d\u00e0i theo h\u00ecnh d\u1ea1ng ngo\u1eb1n ngo\u00e8o v\u00e0 c\u00f3 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m \u0111i\u1ec3n h\u00ecnh c\u1ee7a vi\u1ec7c d\u1eadp t\u1eaft c\u00e1c v\u1ebft n\u1ee9t.<\/strong><\/p>\n\n\n\n

<\/p>\n\n\n\n

R\u00e8n c\u00e1c v\u1ebft n\u1ee9t<\/strong><\/strong><\/h2>\n\n\n\n

1. V\u1ebft n\u1ee9t do nguy\u00ean nh\u00e2n v\u1eadt li\u1ec7u \u0111i\u1ec3n h\u00ecnh, c\u00f3 c\u1ea1nh oxit.<\/strong><\/strong><\/p>\n\n\n\n

  • Quan s\u00e1t b\u1eb1ng k\u00ednh hi\u1ec3n vi<\/strong><\/strong><\/li><\/ul>\n\n\n\n
    \"Quan<\/figure>\n\n\n\n
    • Quan s\u00e1t b\u1eb1ng k\u00ednh hi\u1ec3n vi<\/strong><\/strong><\/li><\/ul>\n\n\n\n
      \"<\/figure>\n\n\n\n

      L\u1edbp s\u00e1ng tr\u1eafng b\u1ec1 m\u1eb7t n\u00ean l\u00e0 l\u1edbp t\u00f4i ngu\u1ed9i th\u1ee9 c\u1ea5p, v\u00e0 l\u1edbp \u0111en s\u00e2u b\u00ean d\u01b0\u1edbi l\u1edbp l\u00e0m ngu\u1ed9i th\u1ee9 c\u1ea5p ph\u1ea3i l\u00e0 l\u1edbp t\u00f4i nhi\u1ec7t \u0111\u1ed9 cao.<\/strong><\/strong><\/p>\n\n\n\n

      K\u1ebft lu\u1eadn r\u1eb1ng c\u00e1c v\u1ebft n\u1ee9t c\u00f3 kh\u1eed cacbon c\u1ea7n \u0111\u01b0\u1ee3c ph\u00e2n bi\u1ec7t v\u1edbi c\u00e1c v\u1ebft n\u1ee9t nguy\u00ean li\u1ec7u. N\u00f3i chung, c\u00e1c v\u1ebft n\u1ee9t r\u00e8n c\u00f3 \u0111\u1ed9 s\u00e2u kh\u1eed cacbon l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng \u0111\u1ed9 s\u00e2u kh\u1eed cacbon tr\u00ean b\u1ec1 m\u1eb7t l\u00e0 v\u1ebft n\u1ee9t nguy\u00ean li\u1ec7u v\u00e0 c\u00e1c v\u1ebft n\u1ee9t r\u00e8n c\u00f3 \u0111\u1ed9 s\u00e2u kh\u1eed cacbon nh\u1ecf h\u01a1n \u0111\u1ed9 s\u00e2u kh\u1eed cacbon tr\u00ean b\u1ec1 m\u1eb7t.<\/strong><\/p>\n\n\n\n

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

      Quenching crack is a common quenching defect, which is caused by many factors. Because the defects of heat treatment begin with product design, the work of preventing cracks should start with product design. It is necessary to select materials correctly and design structures rationally, put forward appropriate technical requirements for heat treatment, properly arrange technological…<\/p>","protected":false},"author":2,"featured_media":19444,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79],"tags":[],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/09\/1.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/13665"}],"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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/comments?post=13665"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/13665\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media\/19444"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=13665"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=13665"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=13665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}