超低碳20-10型不锈钢带极电渣堆焊工艺的优化

Process Optimization of Strip Electrode Electroslag Surfacing Using Ultra-low Carbon Cr20Ni10 Stainless Steel

介绍了带极电渣堆焊的原理。分析了各种工艺因素对超低碳２０－１０型不锈钢带极电渣堆焊焊缝成形和母材稀释率的影响。研究结果表明，焊接电流、电压、堆焊速度、带极伸出长度、焊剂层厚度、磁场控制参数、搭边量及母材试板倾角等工艺因素对焊缝成形和母材稀释率均有影响。随着焊接电流的增大、电压的升高、堆焊速度的减小、磁场的减弱以及母材试板倾角的减小，母材稀释率逐渐减小。试验结果还表明，合适的带极伸出长度、焊剂层厚度和搭边量，是保证焊缝成形和堆焊层质量的必要条件。针对各种工艺因素的影响，提出了最佳堆焊工艺规范参数。

In this article, the principle of strip electrode electroslag surfacing is introduced. Several process factors that influence weld shaping and dilution of strip electrode electroslag surfacing using ultra-low carbon Cr20Ni10 stainless steel are analysed. Research results indicate that the following process factors influence weld shaping and dilution:the welding current, voltage, surfacing speed, protroding length of strip electrode, flux thickness, control parameters of magnetic field, lap width and slope angle of plate. The dilution will decrease if the welding current and voltage increase or the surfacing speed, excitating current and slope angle of plate decrease. The experiment results also indicate that a suitable protroding length of strip electrode, flux thickness and lap width are necessary for perfect weld shaping and quality. At last the best process parameters are recommended.