热处理参数对GH2150A合金微观组织和力学性能的影响  

Effects of Heat Treatment Parameters on Microstructure and Mechanical Properties of GH2150A Alloy

作　　者：朱卫华 杨涛 孙小平[2] 郑念庆[2] 赵小花[2] 王凯旋[2] 刘向宏[2] ZHU Weihua;YANG Tao;SUN Xiaoping;ZHENG Nianqing;ZHAO Xiaohua;WANG Kaixuan;LIU Xianghong(Naval Armament department,Xi'an 710021,China;Western Superconducting Technologies Co.,Ltd.,Xi'an 710018,China)

机构地区：[1]海军装备部,陕西西安710021 [2]西部超导材料科技股份有限公司,陕西省航空材料工程实验室,陕西西安710018

出　　处：《热加工工艺》2022年第12期97-101,共5页Hot Working Technology

基　　金：陕西省重点研发计划工业领域项目(2021GY-020)。

摘　　要：为了提升GH2150A合金的组织均匀性和力学性能,对GH2150A合金进行了不同固溶热处理,研究了不同固溶热处理参数对GH2150A合金组织和力学性能的影响。结果表明,随着固溶温度的升高,合金的晶粒组织、晶界碳化物的尺寸依次增大。固溶温度为1020、1040℃时,GH2150A合金的晶粒组织和晶界碳化物的组织均匀、尺寸细小,且合金的强度较高。合金的拉伸性能呈现逐渐降低的趋势。经1020~1040℃固溶热处理后,合金的晶粒组织细小均匀、晶界碳化物的尺寸细小,且合金的具有良好的拉伸性能;与1060~1100℃热处理后的合金性能相比,抗拉强度提升约20~50 MPa,屈服强度提升约35~50 MPa。合金经1060~1100℃热处理后,固溶温度的升高引起合金的晶粒尺寸及晶界碳化物尺寸增大,晶界处粗大的碳化物促使合金发生沿晶断裂,导致合金的强度降低。In order to improve the structure uniformity and mechanical properties of GH2150A alloy, different solution heat treatments were performed on the alloy, and the effects of different solution heat treatment parameters on the microstructure and mechanical properties of the alloy were studied. The results show that with the increase of the solution temperature, the grain structure of the alloy and the size of the grain boundary carbides increase in turn, and the tensile properties decreases gradually. When the solution temperature are 1020-1040℃, the grain structure and grain boundary carbide of alloy are uniform and small, induced the alloy has high tensile properties. Compared with the properties after heat treatment at 1060-1100℃, the tensile strength and yield strength of the alloy are increased by about 20-50 MPa and 35-50MPa, respectively. After heat treatment at 1060-1100 ℃, the increase of the solution temperature causes the grain size of the alloy and the size of the grain boundary carbide to increase. The coarse carbide at the grain boundary promotes the intergranular fracture of the alloy, which leads to the decrease of the strength of the alloy.

关 键 词：高温合金 固溶处理 微观组织 碳化物 力学性能 

分 类 号：TG166.7[金属学及工艺—热处理]