大型GH4169合金锻造棒组织缺陷分析  

Defect Analysis of Large GH4169 Alloy Forged Bar

作　　者：董兆伟 徐奎奎 孙立辉[1] 刘猛 王杨 董中奇 DONG Zhaowei;XU Kuikui;SUN Lihui;LIU Meng;WANG Yang;DONG Zhongqi(School of Information Technology,Hebei University of Economics and Technology,Shijiazhuang 050061,China;Avic Shangda Superalloys Co.,Ltd.,Technology Center,Qinghe 054800,China;Department of Material Engineering,Hebei Vocational and Technical University of Technology,Shijiazhuang 050000,China)

机构地区：[1]河北经贸大学信息技术学院,河北石家庄050061 [2]中航上大高温合金材料有限公司技术中心,河北清河054800 [3]河北工业职业技术大学材料工程系,河北石家庄050000

出　　处：《铸造技术》2021年第3期180-183,187,共5页Foundry Technology

基　　金：河北省重点研发计划项目资助(20311007D)。

摘　　要：采用真空感应-气氛保护-真空自耗“三联冶炼技术”制备了GH4169合金,经锻造和标准热处理后,采用扫描电镜和X射线衍射分析GH4169合金大棒材的组织缺陷,统计分析并模拟了组织缺陷的变化规律。结果表明,GH4169合金锻件晶粒度细小,含有δ相、γ′相,γ″相、MC碳化物相,从棒材的心部到边缘合金中MC碳化物相峰高有先减小后增加的趋势;棒材中心小缺陷分布密集,边缘缺陷稀疏且以大缺陷为主;靠近最外层,大缺陷分布也很密集。GH4169 alloy was prepared by vacuum induction,atmosphere protection-vacuum self-consumption"triple smelting technology".After forging and standard heat treatment,the microstructure defects of GH4169 alloy bar were analyzed by scanning electron microscope(SEM)and X-ray diffraction(XRD),and the variation law of microstructure defects was statistically analyzed and simulated.The results show that the grain size of GH4169 alloy forgings is fine,including 5-phase,γ′-phase,γ″-phase and MC carbide phase.The peak height of MC carbide phase decreases first and then increases from the core to the edge of the alloy.The distribution of small defects in the center of bar is dense,while the defects in the edge are sparse and the major defects are dominant.Near the outermost layer,the distribution of large defects is also very dense.

关 键 词：GH4169合金 晶粒细化 锻造 热处理 

分 类 号：TG316[金属学及工艺—金属压力加工] TG113