固溶时效对Inconel718合金组织和力学性能的影响  

Influences of Solid Solution and Aging Processes on Microstructure and Mechanical Properties of Inconel718 Alloy

作　　者：刘永飞[1] 刘宏亮[1] 赵献益 张益[1] 

机构地区：[1]宝鸡石油机械有限责任公司,宝鸡721002 [2]中国石油天然气第六建设公司,桂林541004

出　　处：《机械工程材料》2016年第3期49-51,54,共4页Materials For Mechanical Engineering

摘　　要：对Inconel718合金进行了（9201 060℃）×1.5h＋（650850）℃×（610）h的固溶时效处理,研究了固溶温度和时效温度、时间对合金组织和力学性能的影响,并获得了较理想的固溶时效工艺。结果表明：时效处理后,合金的硬度较固溶态的明显提高;随固溶温度升高,奥氏体晶粒长大,δ相逐渐溶解,较适宜的固溶温度为1 000～1 020℃;随时效时间延长,合金中析出相的弥散强化效果更佳,屈强比提高显著;在1 000～1 020℃固溶＋750℃×10h时效处理后,合金的力学性能最佳,抗拉强度超过1 200 MPa,室温冲击吸收功超过120J,硬度超过310HV10。Solid solution treatment from 920 ℃ to 1 060 ℃ for 1.5hand aging treatment from 650 ℃ to850 ℃ for 6-10 h were carried out on Inconel718 alloy,the effects of solid solution temperature,aging temperature and aging time on microstructure and mechanical properties of the alloy were studied.At last,a appropriate heat treatment process was obtained.The results show that,comparing with solid solution,the hardness of the alloy was obviously improved after aging treatment.With the increase of solid solution temperature,austenite grain grew andδphase dissolved gradually.The suitable solid solution temperature was 1 000-1 020 ℃.With the increase of aging time,dispersion strengthening of precipitated phases in the alloy was better,and yield ratio increase signally.After solid solution treatment at 1 000-1 020℃and aging treatment at 750℃for 10 h,the mechanical properties of the alloy was optimum,tensile strength,impact absorption energy at room temperature and hardness was more than 1 200 MPa,120 Jand 310HV10,respectively.

关 键 词：INCONEL718合金 时效处理 力学性能 显微组织 

分 类 号：TG156.92[金属学及工艺—热处理]