点环激光超窄间隙焊与电弧焊高强钢厚板组织性能对比研究
Comparative Study on Microstructure and Properties of High Strength Steel Thick Plate by Adjustable Dot-ring Laser Ultra-narrow Gap Welding and Arc Welding
陈锦涛 1胡祺 1兰玲 2徐沛至 2聂璞林 1李铸国 1孙军浩1
作者信息
- 1. 上海交通大学 上海市激光制造与材料改性重点实验室, 上海 200240
- 2. 中国船舶集团有限公司第十一研究所,上海 200032
- 折叠
摘要
为消除激光超窄间隙焊易产生的侧壁熔合缺陷,开发了点环激光填丝焊工艺,利用中心点激光对焊丝加热,利用环激光对窄间隙坡口加热,完成 30 mm厚 10CrNi3MoV低合金高强钢的焊接,并与传统电弧焊接头开展组织和性能对比分析.结果表明,激光超窄间隙填丝焊接头焊缝区由针状铁素体﹑粒状贝氏体与少量的马氏体组成,电弧焊接头由针状铁素体和粒状贝氏体组成.激光焊的快速冷却特点使其焊缝组织较弧焊更加细小.激光焊接头热影响区由较多的铁素体和粒状贝氏体组织和较少的M-A组元组成,有利于接头性能的提高.激光超窄间隙填丝焊接头抗拉强度与电弧焊接头近似相当,但激光超窄间隙填丝焊接头具有更好的冲击韧性.
Abstract
In order to eliminate sidewall fusion defects commonly associated with laser ultra-narrow gap welding,a dot-ring laser filling welding process was developed.The welding wire was heated using a central spot laser,while the narrow gap bevel was heated using a ring laser.Welding was successfully performed on a 30 mm thick 10CrNi3MoV high strength steel,and a comparative analysis of the microstructure and properties with a traditional arc-welded joint was conducted.The results indicate that the weld zone of the laser ultra-narrow gap filling welded joint consists of acicular ferrite,granular bainite and a small amount of martensite,while the arc-welded joint is composed of acicular ferrite and granular bainite.The rapid cooling characteristic of laser welding results in a finer microstructure compared to arc welding.The heat-affected zone of the laser-welded joint is characterized by a higher proportion of ferrite and granular bainite,and a lower proportion of M-A constituents,contributing to improved joint performance.The tensile strength of the laser ultra-narrow gap filling welded joint is approximately equivalent to that of the arc-welded joint,but the former exhibits superior impact toughness.
关键词
激光超窄间隙焊/电弧焊/低合金高强钢/厚板Key words
laser ultra-narrow gap welding/arc welding/low-alloy high-strength steel/thick plate引用本文复制引用
基金项目
中船集团-上海交通大学海洋装备前瞻创新联合基金(22A010405)
宜宾市科技计划(2022GY002)
出版年
2024
NETL
NSTL
万方数据