热处理对X80钢弯管力学性能和组织的影响  

Effect of heat treatment on microstructure and mechanical properties of X80 steel bent pipe

作　　者：赵金兰[1,2] 刘腾跃 王长安[1,2] 刘迎来[1,2] 王高峰[1,2] 吴金辉[1,2] 

机构地区：[1]中国石油集团石油管工程技术研究院,陕西西安710077 [2]北京隆盛泰科石油管科技有限公司,北京100101 [3]中国石油技术开发公司管道分公司,北京100000

出　　处：《金属热处理》2017年第6期127-129,共3页Heat Treatment of Metals

摘　　要：对X80钢弯管进行1100℃淬火+560℃回火处理,对比分析了热处理前后弯管的组织和力学性能。结果表明:经1100℃淬火+560℃回火处理后,试验X80钢弯管母材及焊接接头的冲击吸收能量和剪切断面率均得到较大提高;强度及硬度下降,伸长率增加;热处理后,组织略增大,晶粒度由12级下降到7.5级。A X80 steel bent pipe was quenched at 1100 ℃ and tempered at 560 ℃,and microstructure and mechanical properties of the pipe before and after heat treatment were compared. The results show that after quenched at 1100 ℃ and tempered at 560 ℃,the impact absorbed energy and shear section rate of matrix and welded joint of the pipe improve greatly,and strength and hardness decrease and elongation increase. The microstructure becomes coarser slightly,and the crystalline size of it changes from 12 grade to 7. 5 grade after heat treatment.

关 键 词：热处理 X80弯管 力学性能 组织 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG161[金属学及工艺—金属材料]