摘要:马氏体拥有很高的强度和硬度而且耐腐蚀性能也好，被广泛应用于我们生活之中，但是塑性韧性差，本文研究了不同的热处理工艺对马氏体不锈钢组织与性能的影响，希望通过热处理工艺使得这一缺陷得到改善，优化马氏体不锈钢热处理工艺参数，为实际生产提供理论依据。在实验中制定了多种热处理工艺，利用不同的热处理温度、热处理时间，热处理次数去获得不同组织及性能的试样。在完成热处理实验后，利用光学金相显微镜，显微硬度计等去分析试样的微观组织、硬度、力学性能。结果表明热处理温度越高，马氏体不锈钢的硬度越高；热处理时间越长，硬度越低；二次热处理后马氏体不锈钢韧性增加硬度下降。不同热处理温度下的显微组织也有很大不同，主要是回火马氏体。35950
毕业论文关键词：马氏体不锈钢；热处理工艺；热处理温度；力学性能；回火马氏体
 Study on the microstructure transformation of martensitic stainless steel during heat treatment
Abstract：Martensite has high strength and hardness and corrosion resistance good, is widely used among our lives, but poor ductility and toughness.Different Heat Treatment Process on Microstructure and Properties of martensitic stainless steel is studied in this paper. Hoping that through the heat treatment process makes this defect improved martensitic stainless steel heat treatment parameters optimized to provide a theoretical basis for the actual production.A variety of heat treatment process are developed in the experiment the use of different heat treatment temperature, treatment time, the number of heat treatment to obtain a sample of different organizations and performance..After the completion of heat treatment experiments, using an optical microscope, micro hardness tester to analyze the microstructure, hardness, mechanical properties of the sample.The results showed that the higher the heat treatment temperature, the higher the hardness of the martensitic stainless steel;the longer the heat treatment, the lower the hardness;after the second heat treatment increases the hardness and toughness martensitic stainless steel drop.Microstructure in the different heat treatment temperatures are also very different.It appears mainly tempered martensite.
Key Words：martensitic stainless steel；heat treatment；heat treatment temperature；mechanical properties；tempered martensite
目录
1 绪论    1
1.1 选题背景    1
1.2 马氏体不锈钢概况    1
1.2.1 马氏体不锈钢的定义    1
1.2.2 马氏体不锈钢的化学成分    1
1.2.3 马氏体不锈钢的分类    2
1.2.4 马氏体不锈钢的特点    3
1.2.5 马氏体不锈钢的合金化    4
1.3 国内外发展概况    5
1.3.1 国内外马氏体不锈钢发展概况    5
1.3.2 国内马氏体不锈钢的应用和发展方向    6
1.4 课题研究的目的及意义    6
2 实验材料和方案    8
2.1 实验材料    8
2.2实验方案制定    8
2.2.1 热处理制度的制定    8
2.2.2 回火温度的确定    8
2.3 实验方案的实施    9
2.3.1 热处理试验    9
2.3.2 硬度、拉伸试验    9
2.4 测试方法    10
2.4.1 微观组织形貌观察    10
2.4.2 力学性能    11
2.5 实验的主要设备    12
3 实验结果与分析    13
3.1 热处理工艺对组织的影响    13
3.1.1 回火温度对组织的影响    13 热处理过程中马氏体不锈钢的组织转变研究:http://www.751com.cn/cailiao/lunwen_34176.html