S355钢焊接接头的组织与力学性能

详细信息

MICROSTRUCTURES AND MECHANICAL PROPERTIES OF THE WELDED JOINTS OF S355 STEEL

摘要: 通过拉伸、冲击和金相检验等试验方法对S355钢半自动气体保护焊焊接接头的力学性能与显微组织进行了研究。结果表明：采用JM-56焊丝对S355钢进行焊接时,接头具有较好的抗剪强度和低温冲击韧性;焊缝组织主要为先共析铁素体、针状铁素体、少量珠光体和粒状贝氏体。熔合区、过热区主要为先共析铁素体及较多的珠光体和一定量的粒状贝氏体。
- 转向架构架 /
- S355钢 /
- 焊接接头 /
- 显微组织 /
- 力学性能
Abstract: Mechanical properties and microstructures of S355 steel welded joints which were gotten from Ar+CO2 gas shielded arc welding were studied via tensile,impact and metallographic test etc..The results showed that the joints of S355 steel welded with wire JM-56 had fine shear strength and mechanical properties.Microstructure in the welded seam mainly contains pro-eutectoid ferrite,acicular ferrite and a little pearlite as well as granular bainite．The fusion area and overheated zong of heat-affected zone mainly contains pro-eutectoid ferrite,some pearlite and definite quantity granular bainite.
- bogie frame /
- S355 steel /
- welded joint /
- microstructure /
- mechanical property

[1]	东涛,刘嘉禾. 我国低合金钢及微合金钢的发展、问题和方向[J]. 钢铁,2000,35(11) :71-75．
[2]	臧传宝.热变形工艺对S355 钢板相变行为的影响[J]. 物理测试,2005,23(3): 38-40．
[3]	王爱云,李玉奇. S355J2G3钢板低温中击韧度不合格原因分析[J]. 理化检验-物理分册,2001,37(1): 35-36．
[4]	王克鲁. S355 电站风塔用钢板控轧控冷工艺研究[D]. 北京:北京科技大学,2000．
[5]	张鑫鑫.对高速列车转向架焊接构架选材的探讨[J]. 机车车辆工艺,1994,1：96-97．