热处理对GH625合金热挤压管材组织及力学性能的影响  

Effect of Heat Treatment on Microstructure and Mechanical Properties of GH625 Alloy Hot Extruded Pipe

作　　者：方旭东[1,2] 韩德培[1] 李阳[2] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]山西太钢不锈钢股份有限公司技术中心,山西太原030003

出　　处：《热加工工艺》2013年第8期204-206,210,共4页Hot Working Technology

摘　　要：采用光学显微镜观察、扫描电镜观察、硬度分析和力学性能检验等方法,研究了热处理对GH625高温合金热挤压管材组织及力学性能的影响。结果表明,随热处理温度的升高,晶粒逐渐长大,碳化物逐渐溶解;热处理温度在1120℃以上时,晶粒开始快速长大,碳化物几乎完全溶解;在970～1120℃,随温度的升高,合金的强度和硬度缓慢降低,塑性缓慢提高;在1120～1180℃,继续升高温度,合金的硬度、强度快速降低,伸长率快速升高。The effects of heat treatment on microstructure and mechanical properties of GH625 alloy hot extruded pipe after heat treatment were studied by OM, SEM, hardness analysis and mechanical performance test. The results show that, with the increase of the heat treatment temperature, the grains gradually grow and the carbides gradually dissolve; when the heat treatment temperature is above 1120 ℃, the grains begin to grow rapidly, and the carbides almost dissolve completely; when and the temperature at the range of 970-1120 ℃, with the temperature increasing, the strength and hardness of the alloy decreases slowly, and the plasticity increases slowly; when the temperature increasing at the range of 1120-1180 ℃, the strength and hardness of the alloy decreases rapidly, and the plasticity increases rapidly.

关 键 词：GH625合金 热处理 碳化物 晶粒尺寸 力学性能 

分 类 号：TG166.7[金属学及工艺—热处理]