焊后热处理对T122钢焊接接头组织及硬度的影响
Effect of Heat Treatment on Microstructure and Hardness of T122 Steel Welding Joint
摘 要
通过模拟现场热处理工艺,研究了T122钢焊接接头在不同回火温度下的硬度及显微组织.结果表明:随回火温度提高,其焊缝硬度降低,740~760 ℃回火后焊缝硬度可满足使用要求,回火后焊接热影响区未出现明显的软化现象;原焊缝组织为马氏体和少量δ铁素体的混合组织,740~760 ℃回火可得到板条特征明显的回火马氏体;回火温度对母材的硬度和组织影响不大.
热处理
硬度
显微组织
焊接接头
T122 steel
heat treatment
hardness
microstructure
welding joint
Abstract
The hardness and microstructure of T122 weld joint at different tempering temperaturs has been studied.The hardness of weld joint reduced with the increase of tempering temperature and could satisfy the requirement when tempered at 740-760 ℃,no apparent softening phenomenon appeared in the HAZ after tempering.Microstructure analysis showed that the weld joint was composed of martensite and small quantity of δ ferrite.Temper martensite with apparent lath character could be got by tempering at 740-760 ℃.The tempering temperature had little effect on the hardness and microstructure of base metal.
中图分类号 TG142.73
所属栏目
基金项目
收稿日期 2007/6/26
修改稿日期 2007/9/27
网络出版日期
作者单位点击查看
备注田旭海(1971-),男,河北石家庄人,工程师.
引用该论文: TIAN Xu-hai,QI Xiang-qian. Effect of Heat Treatment on Microstructure and Hardness of T122 Steel Welding Joint[J]. Materials for mechancial engineering, 2008, 32(5): 20～22
田旭海,齐向前. 焊后热处理对T122钢焊接接头组织及硬度的影响[J]. 机械工程材料, 2008, 32(5): 20～22
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参考文献
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【2】王萍,李宜男.超超临界锅炉用新材料及对焊接接头的要求[J].焊接,2006(7):36-39.
【3】O oro J.Weld metal microstructure analysis of 9-12%Cr steels[J].Pressure Vessels and Piping,2006,83:540-545.
【4】张路,刘正品.回火对国产P91钢组织和性能的影响[J].铸造技术,2003,24(6):531-539.
【5】曹金荣,刘正东.T122耐热钢平衡相转变的热力学计算和分析[J].特殊钢,2005,26(6):16-19.
【6】Spigarelli S,Quadrini E.Analysis of the creep behaviour of modified P91(9Cr-1Mo-V-Nb-N) welds[J].Materials and Design,2002,23:547-552.
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