理化检验：物理分册2011，Vol.47Issue(11)：678-681,689,5.
S275低合金钢焊接接头的组织与力学性能
Microstructure and Mechanical Properties of Welding Joints ofS275 Low Alloy Steel
史绍贤 1陈丽园 2许鸿吉 3谢明3
作者信息
- 1. 北京中铁工设计院,北京100070
- 2. 唐山轨道客车有限责任公司,唐山063035
- 3. 大连交通大学材料科学与工程学院,大连116028
- 折叠
摘要
Abstract
By means of tensile and impact test, hardness testing and metallographic examination, mierostructure and mechanical properties of MAG welding joints of S275 low alloy steel were studied. The results showed that, using JM- 56 to S275 low alloy steel wire welding, the welded joints had good shearing strength; open 45° bevel, stretching away from the weld location was far off the base material, the tensile strength of welded joints met with the teehnical requirements. Intragranular microstructure of weld was tiny intensive acicular ferrite and few pearlite and local widmanstatten structure. Microstructure of fusion area and overheated zone was massive pro-eutectoid ferrite precipitated along grain boundary and ferrite banding growed to intragranular and small amounts of pearlite. Mierostructure of normalized zone and base metal was tiny ferrite and pearlite. Finally, the conclusion was obtained that S275 low alloy steel was feasible for the bogie weIding framework.关键词
S275低合金钢/焊接接头/力学性能/显微组织Key words
S275 low alloy steel/welded joint/mechanical property/microstructure分类
矿业与冶金引用本文复制引用
史绍贤,陈丽园,许鸿吉,谢明..S275低合金钢焊接接头的组织与力学性能[J].理化检验：物理分册,2011,47(11):678-681,689,5.
