摘要
通过化学成分分析以及宏观、微观组织观测和硬度检验等试验方法对高铬铸铁衬板在热处理过程中产生的裂纹进行了分析,结果表明热处理过程中的组织应力和热应力在变截面处集中是裂纹形成的直接原因。通过热处理工艺试验发现适当降低淬火温度并提高回火工艺可确保基体硬度并有效预防裂纹的产生。
The cracks of high chromium cast iron lining plate during heat treatment have been analyzed by means of chemical composition analysis,macrostructure,microstructure observation and hardness test. The results show that the concentration of microstructure stress and thermal stress on the variable cross section during the heat treatment process is the direct cause of crack formation. Through the heat treatment test,it is found that properly reducing the quenching temperature and increasing the tempering process can ensure the hardness of the matrix and effectively prevent cracks.
作者
李洁
张广威
孔玉婷
郎庆斌
殷立涛
Li Jie;Zhang Guangwei;Kong Yuting;Lang Qingbin;Yin Litao
出处
《大型铸锻件》
2019年第6期39-41,共3页
Heavy Casting and Forging
关键词
高铬铸铁衬板
裂纹
热处理应力
回火工艺
high chromium cast iron lining plate
crack
heat treatment stress
tempering process
