电弧增材制造GH4169合金均匀化热处理组织特征、力学性能和蠕变性能研究  

Study of Microstructure,Mechanical Properties,and Creep Properties of GH4169 Alloy After Homogenization Heat Treatment Using Arc Additive Manufacturing

作　　者：司福贵 孙德志 徐亚坤 徐英翠[1] 程浩杰 刘志勇 夏长庚 王孟志 刘安辉 SI Fugui;SUN Dezhi;XU Yakun;XU Yingcui;CHENG Haojie;LIU Zhiyong;XIA Changgeng;WANG Mengzhi;LIU Anhui(China National Heavy Duty Truck Group Company,Automobile Research Institute,Ji'nan 250101,China;China National Heavy Duty Truck Group Company,Ji'nan 250101,China)

机构地区：[1]中国重型汽车集团有限公司汽车研究总院,山东济南250101 [2]中国重型汽车集团有限公司,山东济南250101

出　　处：《电焊机》2024年第2期30-36,共7页Electric Welding Machine

摘　　要：为深入探究电弧增材制造GH4169合金热处理组织特征,针对不同热处理工艺对GH4169合金组织及相的影响开展研究,以确定最佳的均匀化热处理工艺。采用电弧熔丝增材制造技术成形GH4169合金试块,研究不同均匀化热处理温度下试样微观组织和力学性能的变化。结果显示,随着均匀化温度的提升,Laves相逐渐溶解至完全溶解,试样组织逐渐变得均匀。当均匀化温度升至1 100℃时,Laves相完全溶解,试样水平方向和垂直方向均为等轴晶,组织各向异性消除。经过1 100℃均匀化处理再进行固溶+双时效处理,材料强度明显提升,相比沉积态增加50%,且材料的蠕变性能远高于锻件标准。研究表明,通过控制均匀化热处理温度和后续的热处理工艺,能有效提升电弧增材制造GH4169合金的力学性能和蠕变性能。对于优化电弧增材制造GH4169合金的工艺参数,提高其综合性能具有重要意义。In order to investigate the microstructure characteristics of arc additive manufacturing GH4169 alloy during heat treatment,the study was conducted on the effects of different heat treatment processes on the microstructure and phases of GH4169 alloy,in order to determine the optimal homogenization heat treatment process.The effect of different homogenization heat treatment temperature on the microstructure and mechanical properties of the specimen was studied by using arc fuse additive manufacturing technology.The results show that with the increase of homogenization temperature,the Laves phase gradually dissolves to complete dissolution and the sample structure gradually became uniform.When the homogenization temperature is 1100℃,the Laves phase is completely dissolved,the sample organization of the horizontal and vertical directions are equiaxed crystals,and eliminating organizational anisotropy.After homogenization treated at 1100℃and solid solution+double aging heat treatment,the strength of the material was significantly improved,increased by 50%compared to the deposited state,and creep performance of the material is much higher than the forging standard.Studies have shown that the mechanical properties and creep properties of GH4169 alloy can be effectively improved by controlling the homogenization heat treatment temperature and subsequent heat treatment process.It is of great significance to optimize the process parameters of arc additive manufacturing GH4169 alloy and improve its comprehensive performance.

关 键 词：电弧熔丝增材制造 GH4169高温合金 均匀化热处理 微观组织 力学性能 

分 类 号：TG166.7[金属学及工艺—热处理]