氟化物对药芯焊丝熔敷金属扩散氢含量和焊接电弧稳定性的影响  

Effect of Fluorides on Diffusible Hydrogen Content of Weld Metals and Weld Arc Stability in Flux Cored Wire

作　　者：武丹[1] 裘荣鹏[2] 

机构地区：[1]沈阳工学院,辽宁沈阳113122 [2]辽宁广播电视大学,辽宁沈阳110034

出　　处：《热加工工艺》2016年第9期35-38,共4页Hot Working Technology

基　　金：辽宁开放大学应用型专项研究项目(2015YYYJ-2)

摘　　要：以TiO_2为主的氧化钛型药芯焊丝为基础,分别向药芯成分中加入CaF_2、Na_3AlF_6、K_2SiF_6、MnF_3和MgF_3等氟化物,通过对焊接过程中飞溅率的计算和电压波动情况的测定,研究了不同氟化物对电弧稳定性的影响;通过对熔敷金属扩散氢含量的测定研究了不同氟化物对其影响规律,并对熔敷金属显微硬度和组织进行了测量和观察。结果表明:氟化物中原子的电离势越大,焊接时越不容易电离,电弧燃烧越不稳定;所有加入的氟化物都会降低熔敷金属的扩散氢含量,但影响程度不同,焊后熔渣的碱度越大,熔敷金属扩散氢含量越低。Taking titanium oxide type flux cored wire TiO_2 as basis, barious fluorides such as CaF_2, Na_3AlF_6, K_2SiF_6,MnF_3 and MgF_3, were added to the flux composition. The effects of fluorides on the arc stability were examined by spattering ratios calculation and arc voltage signals measurement in the processing of welding. The effects of fluorides on the diffusible hydrogen contents in the weld metals were researched, and the weld metal hardness and microstructure were also examined.The results show that the weld arc becomes instability with the higher ionization potential of fluorides, and all the fluorides can reduce the hydrogen contents, but there are differences in the levels of reduction among the wires. The diffusible hydrogen contents in the weld metals reduce with the greater slag basicity.

关 键 词：氟化物 电弧稳定性 扩散氢含量 电离势 熔渣碱度 

分 类 号：TG422-3[金属学及工艺—焊接]