摘要
利用金相检测、室温拉伸、硬度和冲击检测等方法,研究了不同热处理工艺对12Cr钢组织及性能的影响。结果表明,淬火温度对12Cr钢热处理后的晶粒度影响显著,随淬火温度的升高,12Cr钢的晶粒逐渐长大,而其冲击性能明显改善,硬度也明显提高;随回火温度的上升,12Cr钢的强度逐渐降低。当淬火温度上升到1160℃时,晶粒度粗达3级;当回火温度超过700℃时,12Cr钢的短时持久性能明显恶化;在1100℃淬火,680℃回火时,获得均匀的板条状马氏体组织,短时持久性能最佳。
Microstructure and properties of 12Cr steel after different heat treatment were investigated by using OM,tensile test,hardness and impact test at room temperature.The results show that the quenching temperature has a significant effect on the grain size of the 12Cr steel.The grain size of the 12Cr steel gradually grows with the quenching temperature increasing,while the impact property is improved and the hardness is increased significantly.The strength of the 12Cr steel is decreased gradually with tempering temperature increasing.When the quenching temperature rises to 1160℃,the grain size is up to 3 grade,when the tempering temperature exceeds 700℃,the short-term rupture property of the steel is significantly worse.When quenched at 1100℃and tempered at 680℃,the microstructure of the 12Cr steel is tempered lath martensite,and the short-term rupture property is optimal.
作者
王芬玲
刘禹炯
王天剑
裴玉冰
巩秀芳
Wang Fenling;Liu Yujiong;Wang Tianjian;Pei Yubing;Gong Xiufang(State Key Laboratory of Long-Life High Temperature Materials,Deyang Sichuan 618000,China;Dongfang Electric Corporation Dongfang Turbine Co.,Ltd.,Deyang Sichuan 618000,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第7期42-45,共4页
Heat Treatment of Metals
关键词
12Cr钢
组织
力学性能
短时持久性能
12Cr steel
microstructure
mechanical properties
short-term rupture property
