| 牌号 |
化学成分(质量分数)(%) |
|
|
|
|
| C |
Si |
Mn |
Cr |
其 他 |
|
| ML08 |
0.05～0.12 |
≤0.03 |
O.20～0.50 |
O.7～1.0 |
|
| MLlO |
0.07～O.14 |
|
|
|
|
| MLl5 |
O.12～O.19 |
≤0.07 |
|
|
|
| M120 |
0.17～0.24 |
|
|
|
|
| ML25 |
0.22～O.30 |
≤O.20 |
0.30～O.60 |
|
|
| ML30 |
O.27～O.35 |
|
|
|
|
| ML35 |
0.32～O.40 |
|
|
|
|
| ML40 |
O.37～0.45 |
|
|
|
|
| ML45 |
0.42～0.50 |
|
|
|
|
| ML2SMn |
0.22～O.30 |
≤0.25 |
0.50～O.80 |
|
|
| MIJ30Mn |
O.27～0.35 |
|
|
|
|
| ML35Mn |
O.32～0.40 O.37～O.45 |
|
|
|
|
| ML40Mn |
|
|
|
|
|
| ML45Mn |
O.42～O.50 |
|
|
|
|
| MLl5Cr |
O.12～O.18 |
≤0.30 |
0.40～O.70 |
|
|
| ML20Cr |
O.17～0.24 |
O.50～O.80 |
|
|
|
| ML40Cr |
0.37～0.44 |
O.80～1.10 |
|
|
|
| MLl5MnB |
O.14～O.20 |
1.20～1.60 |
|
BO.0005～O.0035 |
|
| MLl5MnVB |
O.12～0.18 |
V0.07～O.12 BO.0005～0.0035 |
|
|
|
| ML20MnT-B |
O.17～O.24 |
1.30～1.60 |
|
BO.0005～0.0035 TjO.04～O.10 |
|
| M100CrMo |
O.26～O.34 |
0.40～0.70 |
O.80～1.10 |
Mo0.15～0.25 |
|
| ML35CrMo |
0.32～0.40 |
O.40～O.70 |
|
|
|
| ML42CrM0 |
0.38～0.45 |
O.50～0.80 |
O.90～1.20 |
|
|
ML25ML30ML35ML40ML45ML35MnML40MnML45MnML20CrML40CrML35CrMo
| 牌号 |
抗拉强度 ób |
屈服点ós |
伸长率ó5 |
断面收缩率Ψ |
冲击韧度ak |
硬 度 |
|
|
| 热轧 |
退火 |
|
|
|
|
|
|
|
| MPa |
% |
J/cm² |
压痕直径 /mm |
布氏硬度 HBS |
压痕直径 /mm |
布氏硬度 HBS |
|
|
| ≥ |
≥ |
≤ |
≥ |
≤ |
|
|
|
|
| ML08 |
334 |
196 |
33 |
60 |
|
5.2 |
131 |
|
| MLl0 |
333 |
206 |
3l |
55 |
5.1 |
137 |
|
|
| MLl5 |
377 |
226 |
27 |
55 |
5.0 |
1,13 |
|
|
| ML20 |
412 |
245 |
25 |
55 |
4.8 |
156 |
|
|
| M125 |
451 |
275 |
23 |
50 |
4.6 |
170 |
|
|
| ML30 |
490 |
296 |
2l |
50 |
4.5 |
179 |
|
|
| M135 |
530 |
314 |
20 |
45 |
4.4 |
187 |
|
|
| ML40 |
569 |
333 |
19 |
45 |
4.1 |
217 |
4.4 |
187 |
| ML45 |
598 |
353 |
16 |
40 |
4.0 |
229 |
4.3 |
197 |
| ML25Mn |
451 |
275 |
23 |
50 |
4.6 |
170 |
|
|
| ML30Mn |
490 |
294 |
21 |
50 |
4.5 |
179 |
|
|
| ML35Mn |
530 |
314 |
20 |
45 |
4.4 |
187 |
|
|
| ML40Mn |
569 |
333 |
19 |
45 |
4.1 |
217 |
4.4 |
187 |
| ML45Mn |
598 |
353 |
16 |
40 |
4.0 |
229 |
4.3 |
197 |
| MLl5Cr |
686 |
490 |
lO |
45 |
69 |
|
4.5 |
179 |
| ML20Cr |
785 |
588 |
lO |
40 |
59 |
|
|
|
| ML4OCr |
981 |
785 |
9 |
45 |
59 |
4.2 |
207 |
|
| MLl5MnB |
1128 |
932 |
9 |
69 |
|
|
|
|
| MLl5MnVB |
1079 |
883 |
10 |
4.2 |
207 |
|
|
|
| ML20MnTiB |
1128 |
932 |
|
4.4 |
187 |
|
|
|
| M130CrMo |
932 |
785 |
12 |
50 |
78 |
|
4.0 |
229 |
| M135CrMo |
981 |
834 |
45 |
|
|
|
|
|
| ML42CrMo |
1079 |
932 |
4.1 |
217 |
|
|
|
|
冲击韧度aML25MnML30MnML20MnTiBML42CrMo
| 牌 号 |
试样热处理制度 |
| ML08、MLlO、MLl5、ML20、ML25、 ML30、ML35、ML40、ML45、ML25Mn、ML30Mn、ML35Mn、ML4OMn、ML45Mn |
加热到高于临界点30～50℃，保温30min以上，空冷 |
| MLl5Cr、ML20Cr |
一次淬火880℃，二次淬火800℃，水、油冷，回火200℃，水、空冷 |
| ML40Cr |
淬火850℃，油冷，回火520℃，水、油冷 |
| MLl5MnB |
淬火880℃，水冷，回火200℃，水、空冷 |
| MLl5MnVB |
淬火880℃，油冷，回火200℃，水、空冷 |
| ML20MnTiE |
淬火860℃，油冷，回火200℃，水、空冷 |
| ML30CrMo |
淬火880℃，水、油冷，回火540℃，水、油冷 |
| ML35CrMo |
淬火850℃，油冷，回火550℃，水、油冷 |
| ML42CrMo |
淬火850℃，油冷，回火560℃，水、油冷 |
二次淬火800℃，水、油冷，回火200℃，水、空冷ML30CrMo2100433B
ML35冷镦钢热轧盘条的开发与实践
冷镦钢(GB/T6478—1986)简介