BFe10-1-1合金K-TIG焊接接头的组织和性能
Microstructure and Properties of BFe10-1-1 Alloy Plates by K-TIG Welding
马照伟 1刘甲 1崔永杰 1董闯闯 1张亚龙 1郁炎 1胡伟民1
作者信息
- 1. 中国船舶集团有限公司第七二五研究所,河南 洛阳 471039
- 折叠
摘要
采用Keyhole TIG(K-TIG)焊接工艺开展了 10 mm厚BFe10-1-1 铜合金板的焊接试验.结果表明:采用K-TIG焊实现了单面焊双面成型,焊缝成型美观,接头焊缝截面无气孔、未熔合、裂纹等缺陷;焊缝区主要为枝晶状α组织,由熔合线向焊缝中心生长延伸;母材区和热影响区的组织是孪晶状的α相,且热影响区距离焊缝越近,其晶粒尺寸越大.焊缝区的硬度值较高,从焊缝到母材的硬度值先降低再增加,近熔合线的焊缝区和打底焊缝上部区域出现轻微软化.接头平均抗拉强度为 346.5 MPa,断裂位置为母材;在α=180°、d=4 t条件下进行侧弯测试,未发现裂纹.
Abstract
The welding test of 10 mm thick BFe10-1-1 copper alloy plate was carried out by using Keyhole TIG(K-TIG)process.The results show that the single-side welding and double-side forming was realized,and the weld forming is beautiful.The weld section is free of porosity,lack of fusion,cracks and other defects.The microstructure of the weld zone is mainly dendritic α,which grows and extends from the fusion line to the weld center.The structure of base metal zone and heat affected zone is twin α phase.The closer to the weld,the larger the grain size of the heat affected zone.The hardness value of the weld zone is relatively high.The hardness value from the weld to the base metal decreases first and then increases.Slight softening occurs in the weld zone near the fusion line and the upper area of the backing weld.The average tensile strength of the joint is 346.5 MPa,and the fracture location is the base metal.The bending test was carried out under the test conditions of α=180°and d=4 t,and no cracks are found.
关键词
BFe10-1-1合金/K-TIG焊/微观组织/力学性能/硬度Key words
BFe10-1-1 alloy/K-TIG welding/microstructure/mechanical properties/hardness引用本文复制引用
基金项目
国家重点研发计划(2021YFB3700700)
出版年
2024
NETL
NSTL
万方数据