药芯焊丝填充稳定性影响因素分析

Influencing factors analysis on flux cored welding wire filling stability

以JL-YJQ5011药芯焊丝为例,对药芯焊丝填充稳定性影响因素进行分析。结果表明,药粉中金红石60目通过率100%,200目通过率≤15%,锰硅合金60目通过率100%,200目通过率≤40%,还原钛铁60目通过率100%,200目通过率≤20%,锆英砂80目通过率100%时,药粉的填充稳定性最好;金红石烘干到900℃左右,还原钛铁烘干到300℃左右,锰硅合金烘干到400℃左右,锆英砂烘干到800℃左右时,药粉的流动性最好;采用4连辊模拉拔,成90°交叉布置,4道次药粉受力方向成90°,双向变形,可以改善药粉流动性,解决药粉填充稳定性问题。

Taking JL-YJQ5011 flux cored welding wire as an example,influencing factors on flux cored welding wire filling stability was analyzed.Results show that powder filling stability is best when pass rate of rutile 60 mesh is 100%,200 mesh pass rate is not more than 15%,pass rate of manganese silicon alloy 60 mesh is 100%,200 mesh pass rate is not more than 40%,pass rate of reduced titanium iron 60 mesh is 100%,200 mesh pass rate is not more than 20%,and pass rate of zircon sand 80 mesh is 100%.Powder flowability is the best when rutile is dried to 900 ℃,reduced titanium iron is dried to 300 ℃,manganese silicon alloy is dried to 400 ℃,and zircon sand is dried 800 ℃.Using four linked roller dies for drawing,arranged in 90° cross pattern,with 4 pass powder loading direction at 90° and bidirectional deformation,can improve powder flowability and solve the problem of powder filling stability.