T8钢热处理工艺及组织性能研究.doc

T8钢热处理工艺及组织性能研究
摘要:本次实验主要研究热处理工艺对T8钢力学性能的影响。通过制定不同热处理工艺方案,分别研究球化退火以及不同的回火温度对T8钢力学性能的影响。实验中采用180℃、200℃和240℃回火温度作为实验中的变量,观察热处理后T8钢显微组织结构和晶粒的粗细程度。另外为了解球化退火对T8钢力学性能的影响,试验中加入球化退火的热处理,以探究退火条件下对钢力学性能的提升程度。结果表明:淬火工艺钢的显微组织含有饱和碳的马氏体和奥氏体,因马氏体较多,所以钢硬度较高;低温回火后,其组织结构主要含有细小的回火马氏体,晶粒较细,提高了钢的韧性。
关键字:T8钢,热处理,力学性能,显微组织
T8 steel heat treatment process anizational performance research
Abstract:This experiment studied the microstructures and properties of T8 steel through different heat treatment process. By setting different process of heat treatment scheme, studied on the effect of the different tempering temperatures on the mechanical properties of T8 steel. Experiments with 180 ℃, 200 ℃ and 240 ℃ tempering temperature as variables in the experiment, observation of T8 steel microstructure structure and the degree of thickness of grain after heat treatment. In order to understand the influence of the annealing on the mechanical properties of T8 steel, the heat treatment of the ball is added in order to explore the improvement of the mechanical properties of the steel under the condition of annealing. Results show that The microstructure of the quenched steel contains a lot of martensite and austenite, which is more and more high, so the hardness of the steel is higher. By low temperature tempering, the microstructure of the structure mainly includes fine tempered martensite, fine grain size, and the toughness of the steel.
Keywords: T8 steel, heat treatment, mechanical properties, microstructure
目录
1前言 1
研究的目的和意义 1
国内外研究进展 1
研究内容 3
本章小结 4
2 实验过程 5
热处理工艺制定 5
热处理工艺基础 5
热处理工艺过程 6
T8钢热处理工艺过程 7
试样制备和显微组织观察 8
材料力学性能测定 9
硬度测定实验 9
材料冲击韧性的测定 11
材料拉伸试验 14
本章小结 15
3 实验结果与分析 17
显微组织观察与分析 17
硬度测定结果分析 23
实验数据 23
数据分析 23
材料冲击韧性分析 24
24
数据分析 24
材料拉伸实验结果与分析 25
本章小结 29
4 结论 31
参考文献 32
致谢 33
1前言
研究的目的和意义
钢,可以说是现代物质社会的基础。中华人民共和国国家标准 GB/T13304-91《钢分类》描述: