| 钢材:d ≤ 16mm;t ≤ 8mm |
淬火+回火(+QT) |
800~950 |
≥550 |
≥12 |
≥30 |
HRC ① ≥58 |
| 钢材:16mm ≤ d ≤ 40mm;8mm ≤ t ≤ 20mm |
淬火+回火(+QT) |
750~900 |
≥490 |
≥14 |
≥35 |
HRC ① ≥58 |
| 钢材:40mm ≤ d ≤ 100mm;20mm ≤ t ≤ 60mm |
淬火+回火(+QT) |
700~850 |
≥420 |
≥15 |
≥40 |
HRC ① ≥58 |
| 钢材:d ≤ 16mm;t ≤ 16mm |
正火(+N) |
≥680 |
≥370 |
≥11 |
|
|
| 钢材:16mm ≤ d ≤ 100mm;16mm ≤ t ≤ 100mm |
正火(+N) |
≥640 |
≥330 |
≥12 |
|
|
| 钢材:100mm ≤ d ≤ 250mm;100mm ≤ t ≤ 250mm |
正火(+N) |
≥620 |
≥300 |
≥12 |
|
|
| 钢材: |
处理到具有一定剪切性(+S) |
|
|
|
|
② ≤255 |
| 钢材: |
软化退火(+A) |
|
|
|
|
≤229 |