- Quality
- Control In Screw Quality
Various quality inspection procedures such as product appearance, size, elements, performance, harmful substance detection, impact test, forging flow line, hardness, torque, tensile force, metallography, hydrogen embrittlement test, coating, salt spray test, etc.
- 心部硬度
- 热处理后，螺钉的芯部硬度应在270 HV 5和425 HV 5之间
- 表面硬度
- 热处理后，螺钉的表面硬度应至少为560 HV 0.3
- 扭力
-
| 螺纹直径 | 最小断裂扭矩（Nm） |
| M2.9 | 1.5 |
| M3.5 | 2.8 |
| M3.9 | 3.4 |
| M4.2 | 4.5 |
| M4.2 | 6.5 |
| M5.5 | 10 |
| M6.3 | 14 |
- 渗碳深度
-
| 螺纹直径 | 最小值 | 最大值 |
| M2.9 to M3.5 | 0.05mm | 0.18mm |
| M3.9 to M5.5 | 0.10mm | 0.23mm |
| M6.3 | 0.15mm | 0.28mm |
晓军产品画册(2023)
