低碳钢与奥氏体不锈钢焊接工艺改进研究

Research on welding technology improvement between low carbon steel and austenitic stainless steel

针对低碳钢与奥氏体不锈钢在焊接过程中易产生裂纹、焊缝韧性较低、碳的迁移以及焊缝剥离等问题,通过对材料焊接性能的理论分析,并结合现场实践经验,提出了有效控制焊接过程中产生上述缺陷的相关措施。主要包括严格控制母材熔合比、焊接时采用过滤层、使用含镍量较高的填充材料等,并提出了一系列改进焊接工艺的建议,在实际工程中取得了良好的效果。

In consideration of the problems in the process of welding between low carbon steel and austenitic stainless steel, such as cracks, low toughness of welding seam, carbon migration and welding seam exfoliation, through theoretical analysis of material welding performance and in combination with field practical experience, the relevant countermeasures to effectively con- trol the above defects were carried out, including strict control over material blending ratio, adopting filter layer during welding process and using filling materials with high nickel content. Moreover, some suggestions to improve the welding technology were proposed, which proved that these measures have a favorable effect in practical applications.