35CrMnSiA钢感应焊后热处理组织及性能分析
毕业设计说明书（论文）外文摘要
Title The structures and properties of steel 35CrMnSiA by
heat treatment after induction welding Abstract
The subject of the use of Nanjing University of Science and Technology spontaneous development of NW-400-B welding automatic welding on 35CrMnSiA steel substrate induction cladding welding of H96brass, welded 35CrMnSiA steel organization was coarse martensite and granular bainite. By the use of 890℃+500℃ quenching tempering microstructure is tempered sorbite, hardness is 40-44HRC;890 ℃+340℃ tempering quenched tempered martensite and granular bainite, hardness is 42-46HRC. By 900℃ normalizing quenched at +890 ℃+500℃ tempering organizations tempered sorbite, hardness is 40-42HRC;900℃ normalizing quenched at +890℃+340℃tempering of tempered martensite and granular bainite, hardness is 45-50HRC. Metallographic observation shows that,900℃ normalizing + tempering and quenching and tempering hardness only little change, however the former can obtain fine grain, should adopt 900℃ normalizing + tempering process.
Keywords 35CrMnSiA induction welding
heat treatment quenching and tempering
目 次
1 绪论 1
1．1 选题背景 1
1．2 35CrMnSi的热处理 3
1．3 本课题的任务及研究方法 5
2 35CrMnSiA钢的感应熔敷黄铜试验 6
2．1 试验设备 6
2．2 焊接辅助材料 7
2．3 感应熔敷焊试验 8
3 焊后热处理试验设备和热处理工艺 9
3．1 焊后热处理试验设备 9
3．2 焊后热处理工艺制定及试验 9
3．2.1 正火 9
3．2.2 淬火 10
3．2.3 回火 10
4 金相观察、分析 13
4．1 金相试样的制备 13
4．2 金相试样的观察与分析 13
4．2.1 焊后未经热处理的金相组织 13
4．2.2 890℃淬火的金相组织 14
4．2.3 890℃淬火+340℃回火的金相组织 14
4．2.4 890℃淬火+500℃回火的金相组织 15
4．2.5 900℃正火+890℃淬火的金相组织 15
4．2.6 900℃正火+890℃淬火+340℃回火的金相组织 15
4．2.7 900℃正火+890℃淬火+500℃回火的金相组织 16
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