| 摘要: |
| 采用汉诺威电弧质量分析仪、高速摄像机和激光粒度仪等研究了不锈钢药芯焊丝中铁粉/长石比对不锈钢药芯焊丝电弧稳定性、焊接烟尘平均颗粒尺寸、烟尘中Cr(Ⅵ)含量及其生成率.结果表明,短路过渡生成的焊接烟尘平均颗粒尺寸比粒状过渡小,烟尘中Cr(Ⅵ)/总Cr(n/N)的比值大;在同一焊接参数下,当药芯中铁粉/长石比例在1.8时,短路过渡时间最短为1033μs,焊接电弧稳定、焊接烟尘颗粒平均尺寸为1154 nm, Cr(Ⅵ)的含量及Cr(Ⅵ)/总Cr(n/N)的比最小,分别为1555.8 mg/kg和24%. |
| 关键词: 六价铬 电弧稳定性 焊接烟尘尺寸 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51275008);北京市自然科学基金资助项目(2152008) |
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| Investigation on influence of iron/feld spar in flux cored wire for stainless steel on hexavalent chromium in welding fume |
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BAI Jiantao1, LI Zhuoxin1, LI Yang2, WOLFGANG Tillmann3
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1.School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;2.The FILARC Welding(Jiangsu)Co., Ltd., Changzhou 312245, China;3.Institute of Materials Engineering, Dortmund University of Technology, Dortmund 24427, Germany
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| Abstract: |
| The influence of iron powder/feldspar on the arc stability, average particle size, Cr (Ⅵ) content and Cr(Ⅵ)/total Cr(n/N)were investigated by hanover arc analyzer, high-speed cameras and laser particle sizer. The experimental results showed that average particle size of welding fume inshort circuit transfer is smaller than the granular transfer;The proportion of Cr(Ⅵ)/total Cr(n/N) is low in welding fume of short circuit transition.Under the same welding parameters, welding fumes average particle size is up to 1154 nm, Cr (Ⅵ) and Cr (Ⅵ)/total Cr are 24% and 1555.8 mg/kg respectively when iron powder/feldspar is around 1.8, under which the shortest short transition time is 1033μs. |
| Key words: Cr(Ⅵ) arc stability size of welding fume |
