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在对ZA12合金钨极氩弧焊接头HAZ不同部位 (测点 )焊接热循环曲线大量测试和计算基础上 ,借助于焊接热模拟技术 ,设计了进行焊接HAZ显微组织模拟的热循环参数 ,并在DM 10 0 0A型电阻加热式热模拟试验机上 ,实现了ZA12合金钨极氩弧焊焊接HAZ加热峰值温度θm=370℃ ,30 5℃区域 (测点 )显微组织的模拟。研究结果表明 :ZA12合金钨极氩弧焊焊接HAZ组织热模拟试样的耐磨性均高于母材 ,并均随负荷的增加其耐磨性降低。焊接HAZ组织热模拟试样的耐磨性与其组织中α相内共析体组织形态密切相关
On the basis of extensive testing and calculation of the welding thermal cycle curves of different parts (measuring points) of the HAZ of the ZA12 alloy TIG welding torch, the thermal cycling parameters for the welding HAZ microstructure simulation were designed by means of the welding thermal simulation technique In DM 10 0 0A resistance thermal simulation test machine, the ZA12 alloy TIG welding HAZ heating peak temperature θm = 370 ℃, 30 5 ℃ region (measuring point) microstructure simulation. The results show that the wear resistance of HAZ specimens welded by ZA12 alloy is higher than that of base metal, and the wear resistance decreases with the increase of load. The wear resistance of welded HAZ specimens was closely related to the α-phase eutectoid morphology of the HAZ specimens