高强度长持久时间GH738棒材试制研究  

Experimental Study of GH738 Barwith High Strength and Long Lasting Time

作　　者：代礼斌[1] 李济林[1] 万红[1] 王金太[1] 莫燕[1] 王明波[1] 李永友[1] 

机构地区：[1]重庆材料研究院有限公司国家仪表功能材料工程技术研究中心,重庆400707

出　　处：《材料导报（纳米与新材料专辑）》2015年第1期400-402,共3页

基　　金：重庆市新产品创新青年科技人才培养计划(cstc2013kjrc-qnrc50005);科技发展基金资助项目(SINOMACH 12科172号)

摘　　要：采用真空感应熔炼+电渣重熔+锻造生产GH738合金圆棒,对圆棒进行热处理试验确定出最佳的热处理工艺:1040℃×4h、水冷,845℃×4h、空冷,760℃×16h、空冷。该工艺处理后的合金棒材性能达到要求,其室温拉伸性能为:抗拉强度Rm=1370 MPa,屈服强度Rp0.2=1030 MPa,伸长率A4D=18.5%,断面收缩率Z=20.5%;高温(815℃)拉伸性能为:Rm=740MPa,Rp0.2=725MPa,A=30.5%,Z=56%;高温(732℃,517MPa)持久:τ=148h,A=19.5%,Z=16%。GH738 alloy rods were produced by vacuum induction melting （VIM）, electroslag remelting （ESR） and forging. The best heat treatment condition was determined by studying the heat treatment of round bars. The optimal heat treatment is 1040 ℃×4 h, water cooling, 845 ℃×4 h, air cooling, 760 ℃ ×16 h, air cooling. Alloy rods perfor-manced achieve the trial production with the heat treatment, as their room-temperature performance is Rm = 1370 MPa,Rp0. 2 = 1030 MPa, A4D = 18. 5 Y00, Z= 20. 5 %/00, high-temperature performance at 815 ℃ is Rm = 740 MPa, Rp0. 2 =725 MPa,A= 30. 5%, Z= 56%, high-temperature lasting at 732 ℃, 517 MPa is 148 hours, A = 19. 5%, Z=16%.

关 键 词：固溶处理 GH738 显微组织 力学性能 高温性能 

分 类 号：TB31[一般工业技术—材料科学与工程] TG141[金属学及工艺—金属材料]