摘要
采用不同的模拟焊后热处理制度对承压容器用12Cr2Mo1钢和14Cr1Mo钢进行热处理,采用力学性能测试、微观分析等方法对热处理后材料的力学性能和显微组织进行分析。结果表明:随着模拟焊后热处理保温时间的延长,材料的强度明显下降,塑性和韧性提高,晶粒度变化不明显;随着模拟焊后热处理保温时间的延长,材料显微组织中的碳化物析出量增加,且碳化物聚集、长大,导致固溶强化、位错强化和弥散强化作用减弱,最终导致材料的强度下降。
Different simulated post weld heat treatment regimes were used to heat treat 12Cr2Mo1 steel and 14Cr1Mo steel for pressure vessels.The mechanical properties and microstructure of the materials after heat treatment were analyzed using methods such as mechanical property testing and microscopic analysis.The results show that with the extension of simulated post weld heat treatment insulation time,the strength of the material significantly decreased,plasticity and toughness improved,and the change in grain size was not significant.With the extension of the simulated post weld heat treatment insulation time,the amount of carbide precipitation in the microstructure of the material increased,and the carbide aggregated and grew,resulting in weakened solid solution strengthening,dislocation strengthening,and dispersion strengthening effects,ultimately led to a decrease in the strength of the material.
作者
李金梅
张建晓
俄馨
刘丽梅
史伟
蒋春宏
LI Jinmei;ZHANG Jianxiao;E Xin;LIU Limei;SHI Wei;JIANG Chunhong(Lanzhou LS Test Technology Co.,Ltd.,Lanzhou 730314,China)
出处
《理化检验(物理分册)》
2025年第6期6-9,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
承压容器用钢
CR-MO钢
模拟焊后热处理
显微组织
力学性能
steel for pressure vessel
Cr-Mo steel
simulated post weld heat treatment
microstructure
mechanical property
