精品文档---下载后可任意编辑·················2··············3··············43
1 初步选材··············43
2 确定材料··············53
3 20Cr2Ni4A 的化学成分、相变点及合金元素作用·····64 确定加工路线4
1 初步确定加工路线············84
2 每个步骤的作用·············95 热处理工艺方法选择5
1 预备热处理工艺【4】的选择········105
2 渗碳工艺【5】的选择···········115
3 最终热处理【6】的选择··········126 制定热处理工艺的制度6
1 正火工艺的制定············126
2 高温回火工艺的制定6
3 渗碳工艺的制定··············176
4 高温回火工艺的制定·············216
5 淬火工艺的制定···············216
6 低温回火工艺的制定·············257 热处理设备选择 7
1 箱式电阻炉的选择··············27 7
2 井式渗碳炉的选择··············28 7
3 热处理冷却设备的选择············298 工装设计8
1 热处理夹具的选择··············30 8
2 热处理辅具·················319 检验设备及方法选择 9
1 外观····················35 9
2 硬度····················35 9
3 金相检查··················36 9
4 渗层深度··················3710 热处理缺陷分析10
1 正火缺陷分析················3810
2 回火缺陷分析········
