Invar合金焊接技术研究现状及展望  

Research Status and Prospect of Invar Alloy Welding Technology

作　　者：刘红兵 宣扬 杨瑾 LIU Hongbing;XUAN Yang;YANG Jin(Materials Engineering College of Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《航空制造技术》2020年第9期83-88,102,共7页Aeronautical Manufacturing Technology

基　　金：上海工程技术大学人才行动计划资助项目(2018RC452018);浙江省重点研发计划资助项目(2019C01114);国家自然科学基金(51805315)。

摘　　要：Invar合金因其极低的热膨胀系数而广泛应用于大型飞机复合模具制造及LNG船等领域,拥有广阔的应用前景。Invar合金焊接后焊缝质量以及焊缝与母材热膨胀系数匹配性是Invar合金能否得以广泛应用的关键。主要介绍了Invar合金应用最广泛的传统焊接方法MIG和TIG,以及新型焊接方法激光焊、激光电弧复合焊和搅拌摩擦焊,较为全面地总结了Invar合金的焊接技术研究现状,并提出新的高质量、高效率焊接方法—K–TIG焊。Invar alloy is widely used in the manufacture of large-scale aircraft composite molds and LNG ships due to its extremely low coefficient of thermal expansion.It has broad application prospects.The key to the wide application of Invar alloy are the quality of the weld and the matching of the thermal expansion coefficient between the weld and the base metal.This article mainly introduces the most widely used traditional welding methods of Invar alloy,MIG and TIG,and the new welding methods including laser welding,laser arc hybrid welding and friction stir welding.Meanwhile,this paper summarizes the welding status of Invar alloy,and proposes a new high-quality,high-efficiency welding method:K–TIG welding.

关 键 词：Invar合金 低膨胀合金 模具制造 焊接工艺 匙孔TIG焊 

分 类 号：TG44[金属学及工艺—焊接]