[1]毛锦荣,陈星斌,周叶平,等.316L不锈钢电子束锁底焊接接头成形及显微组织[J].焊管,2018,41(11):17-22.[doi:10.19291/j.cnki.1001-3938.2018.11.004]
 MAO Jinrong,CHEN Xingbin,ZHOU Yeping,et al.Formation and Microstructure of Electron Beam Lock Bottom Welded Joints of 316L Stainless Steel[J].,2018,41(11):17-22.[doi:10.19291/j.cnki.1001-3938.2018.11.004]
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316L不锈钢电子束锁底焊接接头
成形及显微组织
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
41
期数:
2018年第11期
页码:
17-22
栏目:
试验与研究
出版日期:
2018-11-28

文章信息/Info

Title:
Formation and Microstructure of Electron Beam Lock Bottom
Welded Joints of 316L Stainless Steel
文章编号:
10.19291/j.cnki.1001-3938.2018.11.004
作者:
毛锦荣陈星斌周叶平冷庆虎谢腾飞
 江西省特种设备检验检测研究院,南昌 330096
Author(s):
MAO Jinrong CHEN Xingbin ZHOU Yeping LENG Qinghu XIE Tengfei
Jiangxi Special Equipment Inspection Institution, Nanchang 330096, China
关键词:
焊接316L不锈钢电子束焊接焊缝成形显微组织
Keywords:
welding316L stainless steel electron beam welding weld forming microstructures
分类号:
TG456.3
DOI:
10.19291/j.cnki.1001-3938.2018.11.004
文献标志码:
A
摘要:
针对激光焊对316L不锈钢进行锁底焊接时,焊缝出现气孔,裂纹等缺陷的问题,采用电子束焊接的方法对316L不锈钢进行锁底焊接,并对其焊接接头焊缝成形及显微组织进行了研究。研究结果表明,当焊接速度一定时,316L不锈钢随着焊接电流的增大,焊缝熔深变化不大,余高和熔宽都逐渐增大,焊缝深宽比由3.48减小至3.01;当电子束流一定时,随着焊接速度的增大,焊缝余高先增大后基本不变,熔深和熔宽都逐渐减小,焊缝深宽比由3.03增大至3.38。典型焊接接头组织主要为铁素体-奥氏体组织,且随着焊缝深度的增加,晶粒逐渐细化。焊缝边缘主要由密排的柱状枝晶、少量等轴晶组成;焊缝中心区域由细小的等轴晶、少量柱状枝晶组成;焊缝底部主要由呈片状细小的等轴晶组成。
Abstract:
For the laser welding of 316L stainless steel lock bottom, the weld seam is prone to defects such as blowholes and cracks. The 316L stainless steel is fixed by the electron beam welding method, and the formation and microstructure of the welded joint are studied. The results show that when the welding speed is constant, the weld reinforcement and weld pool width of 316L stainless steel increase gradually with the increase of welding current, and the penetration depth has little change, and the weld depth-to-width ratio decreases from 3.48 to 3.01. When the electron-beam current is certain, the reinforcement increases first and then remains at a certain level with the increasing welding speed, but the penetration and the width of the weld are decreases gradually, the weld depth-to-width ratio increases from 3.03 to 3.38. The microstructure of the typical joints mainly consists of ferrite and austenite, and the grain is refined gradually with the increase of the weld depth. The edge of weld is mainly composed of dense columnar dendrites and equiaxed grains. The central of the weld consists of fine equiaxed grains and a small amount of columnar dendrites, and the bottom of weld is mainly composed of fine equiaxed grains.

参考文献/References:

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备注/Memo

备注/Memo:

收稿日期:2018-06-20
修改稿收稿日期:2018-08-29

作者简介:毛锦荣(1990—),硕士,目前主要从事激光焊、电子束焊、检验检测等工作,发表论文10余篇。

更新日期/Last Update: 2019-01-14