不锈钢固溶渗氮技术.doc

常州机电职业技术学院 毕业设计（论文） 作 者： 学 号： 系 部： 模具技术系 专 业： 材料成型与控制 题 目： 不锈钢的固溶渗氮技术 导者： 评阅者： 年 月   目录 1 绪论························································6 1.1 不锈钢材料简介··············································6 1.1.1 不锈钢的分类···············································7 1.1.2 不锈钢的主要作用···········································8 1.2 不锈钢热处理特点············································8 1.2.1 奥氏体不锈钢···············································9 1.2.2 铁素体不锈钢···············································10 1.2.3 马氏体不锈钢···············································10 1.2.4 沉淀硬化型不锈钢···········································11 1.3 论文的目的和意义···············································12 2 奥氏体不锈钢固溶渗氮········································12 2.1 试验材料及方法·············································12 2.2 试验结果与分析·············································14 2.3 显微硬度···················································16 2.4 氮浓度分布·················································16 2.5 X射线分析··················································18 2.6 极化曲线···················································19 2.7 试验结论···················································19 3 渗氮温度对奥氏体不锈钢性能的影响····························20 3.1 试验材料及方法·············································20 3.2 试样表征···················································21 3.3 结果与讨论·················································21 4 不锈钢固溶渗氮··············································24 4.1 固溶渗氮工艺原理···········································24 4.2 心部和表面层显微组织的关系·································25 4.3 最佳合金成分确定···········································26 4.4 工业固溶渗氮···············································27 5 渗氮温度对3Cr13不锈钢表面渗氮层组织和性能的影响············27 5.1 试样制备与试验方法···