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长期时效对铸造ZG1Cr11Ni2WMoV马氏体耐热钢组织的影响
Effect of Long-time Aging on Microstructure of ZG1Cr11Ni2WMoV Martensitic Heat Resistant Casting-steel
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- DOI:
- 作者:
- 逯红果 殷凤仕 马中钢 王雷 李化坤 王光华 李道乾
LU Hongguo;YIN Fengshi;MA Zhonggang;WANG Lei;LI Huakun;WANG Guanghua;LI Daoqian
- 作者单位:
- 山东理工大学机械工程学院 山东瑞泰新材料科技有限公司
School of Mechanical Engineering,Shandong University of Technology,Zibo255049,China;Shandong Ruitai NewMaterial Technology Co.,Ltd.,Yiyuan256100,China
- 关键词:
- 长期时效 纳米析出相 马氏体耐热钢 LAVES相
long-time aging nano-sized precipitate martensitic heat resistant steel laves phase
- 摘要:
- 采用扫描电镜、透射电镜和金相显微镜研究了580℃长期时效对ZG1Cr11Ni2WMoV马氏体耐热钢显微组织的影响。研究结果表明:在1 050℃×1 h空冷淬火+580℃×2 h空冷回火后,存在纳米尺寸的M6C型碳化物弥散分布在回火马氏体板条上;580℃长期时效处理1 000 h,原奥氏体晶界和马氏体板条界上析出M23C6型碳化物,δ-铁素体中析出M23C6型碳化物和Laves相。The effects of long-time aging at 580℃on the microstructure of ZG1 Cr11 Ni2 WMoV martensitic heat resistant casting-steel were studied by SEM equipped with energy dispersive spectrum analysis,TEM and optical microscope.The results show that after 1 050℃for 1 h air cooling quenching and 580℃for 2 h air cooling and tempering,the nano-sized M6 C carbides are dispersedly distributed on the tempered martensite laths.During long-term aging treatment at 580℃for1 000 hrs,the M23 C6 carbides was precipitated from the grain boundary of austenite and martensite,while the M23 C6 carbides and laves phases are precipitated fromδ-ferrite.