T91钢管TIG焊接接头力学性能和显微组织分析.pdf

第 40 卷第 9 期
2010 年 9 月 Electric Welding Machine Sept. 2010
T91 钢管 TIG 焊接接头力学性能与
显微组织分析
杨兴全
(四川化工职业技术学院机械工程系,四川泸州 646005)
摘要:
T91 钢管多采用 TIG 焊,焊接接头高温力学性能对 T91 钢的应用起至关重要的作用。采用不同的
高温试验工艺对 T91 钢管的 TIG 焊接头进行处理,分析 TIG 焊接头在力学性能和显微组织上的差异。
试验结果表明:高温试验前后,T91 钢管 TIG 焊接接头的力学性能变化不大,马氏体组织增大,晶间析
出了碳化物。碳化物在 T91 钢管 TIG 焊接接头保持高温力学性能稳定性中起决定性作用。
关键词:
T91 钢;TIG 焊;高温力学性能;显微组织;碳化物
中图分类号: 文献标识码: 文章编号:
TG454 A 1001-2303(2010)09-0092-03
Analysis on microstructures and mechanical behavior under high
temperature of T91 steel TIG joint
YANG Xing-quan
(Department of Mechanical Engineering,Sichuan College of Chemical Technology,Luzhou 646005,China)
Abstract:Welding T91 steel pipe is usually used TIG welding,mechanical behavior under high temperature of welded joints played
an important role. Mechanical property and microstructure of T91 steel pipe joint with TIG welding on different high-temperature test
process was result showed that T91 steel after high temperature testing the mechanical properties of TIG welded joints
changed was increased and carbide was carbide played an important role on mechanical behavior under
high temperature of joint stability.
Key words:T91 steel;TIG welding;mechanical behavior under high temperature;microstructure;carbide
0 前言元素氧化过烧;而另一方面它又对冷裂纹有组织上
的敏感性,在焊后的马氏体转变中,氢以过饱和状
随着电力工