均匀化工艺对GH5188合金组织及力学性能的影响  

Effect of homogenization treatment on microstructure and mechanical properties of GH5188 alloy

作　　者：戚慧琳 蒋世川 郭续龙 Qi Huilin;Jiang Shichuan;Guo Xulong(Chengdu Advanced Metal Materials Industrial Technology Institute Co.,Ltd.,Chengdu Sichuan 610303,China)

机构地区：[1]成都先进金属材料产业技术研究院,四川成都610303

出　　处：《金属热处理》2023年第2期150-157,共8页Heat Treatment of Metals

摘　　要：利用JMatPro软件、金相显微镜、扫描电镜、能谱分析以及高温拉伸、高温压缩试验等方法,分析GH5188合金铸锭的溶质元素偏析规律、均匀化热处理过程的微观组织演变规律及均匀化过程对GH5188合金力学性能的影响。研究表明,GH5188合金的主要析出相为M_(6)C和M_(23)C_(6),合金中的主要正偏析元素为W和Cr,负偏析元素为Ni和Co。采取1200℃×72 h的均匀化工艺,可以有效消除原始铸态块状析出相,消除W、Cr、Ni、Co等元素偏析,达到最合适的均匀效果。均匀化热处理后,GH5188合金的力学性能得到了提升,在1180℃拉伸、压缩条件下,抗拉强度达到158 MPa,变形抗力为244.29 MPa。Law of solute element segregation and microstructure evolution during homogenization heat treatment process of GH5188 alloy ingots and the effect of homogenization process on mechanical properties of GH5188 alloy were analyzed by means of JMatPro software,metallurgical microscope,scanning electron microscopy,energy dispersive spectroscopy and high temperature tensile and compression tests.The results show that the main precipitation phases of the GH5188 alloy are M6C and M_(23)C_(6),the important positive segregation elements are W and Cr,and important negative segregation elements are Ni and Co.1200℃×72 h homogenization treatment can reduce original precipitated phases in as-cast ingots,eliminate W,Cr,Ni,Co,et al element segregation and achieve the most suitable uniformity.After homogenization heat treatment process,the mechanical properties of the GH5188 alloy are improved.Under tensile and compression conditions at 1180℃,the tensile strength reaches 158 MPa,and the deformation resistance is 244.29 MPa.

关 键 词：GH5188合金 均匀化 偏析 铸态组织 力学性能 

分 类 号：TG132.3[一般工业技术—材料科学与工程]