计划生育征文.doc

第卷第期长春工业大学学报
3 7 6 3 7
年月
20 1 6 1 2 Journal of Changchun University of Technology 1 6
DOI
: 5 923/j .22-1 382/ 6 .6 .03
镀锌钢板点焊焊接接头组织与性能
,
陈立伟 1 2 , 于燕 1 ∗

长春工业大学先进结构材料省部共建教育部重点实验室吉林长春
(1 . , 1 300 1 2;
河北建筑工程学院机械工程学院河北张家口
2. , 075000)
摘要:采用了合理的电阻点焊焊接参数对镀锌钢板进行焊接,研究了点焊参数对焊接接头

组织和性能的影响,分析了焊接接头的硬度分布和拉伸断口断裂机理。结果表明,焊接接头的
抗拉强度随着焊接电流和焊接时间的增加均呈先增大后减小趋势;焊缝区铁素体组织随着焊
接电流的增大现象明显,而焊缝区铁素体组织却随着焊接时间的增加而变得细密;焊接接头的
焊缝区的硬度均匀,且高出母材很多;焊接接头断口表现出明显的延性断裂特征。
关键词:镀锌钢板;电阻点焊;工艺参数;硬度;拉伸断口
中图分类号: 文献标志码: 文章编号: ( )
TG 45 3 A 1 6 74-1 3 74 201 6 06-05 3 1-04
Mi crostructure and properties of
resistance spot wel ded j oi nts of galvanized steel sheet
1 ,2 1 ∗
CHEN Liwei , YU Yan
(1 .Key Laboratory of Advanced Structural Materials,Ministry of Education,
Changchun University of Technology,Changchun 1 300 1 2,China;
of Mechanical Engineering,Hebei Institute of Architecture and Civil Engineering,Zhangjiakou 07 5000,China)
Abstract
:The galvanized steel sheet is welded with reasonable resistance spot welding parameters to
study the influence of resistance spot welding parameters on microstructure and properties of welded
j results show the following:when the welding current and welding time increases,the
welding j oint tensile strength increases and then decreases;weld zone microstructure of ferrite extends
obviously when the welding current increases;weld zone microstructure of ferrite e dense with
the increase of welding time;the hardness of weld zone distributes evenly and higher than that of the
parent material;welded j oint fracture shows obvious ductile fracture characteristics.
Key words
:galvanized sheet;resistance spot welding;process parameter;hardness;tensile fracture.
收稿日期:
20 1 6-05-2 5
基金项目:长春市科技局重大科技攻关项目
(1 4KG03 9)
作者简介:陈立伟男汉族辽宁朝阳人长春工业大学硕士研究生主要从事汽车用钢焊接性能方向研究
(1 9 90 -), , , , , ,E-mail:
通讯作者于燕女汉族吉林长春人长春工业大学教授博士主要从事汽车材料
1 1 6 9 9 6 1 474@ .com.∗: (1 9