LY12铝合金A-TIG焊活性剂研制  

Development of active fluxes for LY12 aluminum alloy A-TIG welding

作　　者：孔兆财[1] 夏桂海 林三宝[2] 季相儒 

机构地区：[1]首都航天机械公司,北京100071 [2]哈尔滨工业大学先进焊接与连接国家重点实验室,黑龙江哈尔滨150001

出　　处：《机械制造文摘（焊接分册）》2017年第2期6-10,共5页Welding Digest of Machinery Manufacturing

基　　金：国家科技支撑计划项目(2015BAF01B00)

摘　　要：针对LY12铝合金,利用正交试验法研制A-TIG焊接的活性剂,选用NaCl,NaF,CaF_2混合物作为活性剂。实验发现,当三者质量之比为1:1:2时焊缝深宽比最大。焊接过程中电弧在未涂敷的铝板上主要为扇形,当电弧过渡到涂敷活性剂一侧时,由扇形变为钟罩形,电弧收缩,热量集中,熔深增大,此外由于焊接过程中活性剂存在,电弧左右快速摆动,增加了熔宽。In this paper, active flux for LY12 aluminum alloys was developed. The active fluxes are the mix-tures of NaCl,NaF and CaF2. When they were mixed in proportion of 1 ; 1 ;2, the depth- to-width ratio of the welded joint is the highest. The arc shape turns from fan-shaped to bell shaped when it burns on the fluxes coa-ted place. The arc constrict and the welding energy are concentrated, so that the penetration depth increases. The arc works on the active flux and swings to increase the weld width.

关 键 词：铝合金 A-TIG焊 活性剂 

分 类 号：TG444.74[金属学及工艺—焊接]