厚板09MnNiDR钢焊接工艺试验

摘要

In this article, it briefly introduced the characteristics of domestic low alloy steel 09MnNiDR, and analyzed its weldability. According to the welding technology requirements of some low temperature spherical tank, the welding procedure qualification for 56mm 09MnNiDR steel was carried out, and the welding process parameters for low temperature spherical tank was determined through welding procedure test. The results showed that using W707DRQ electrode to conduct shielded metal arc welding, the weld indicators all meet design demands, the low temperature impact toughness at -70 ℃ exceeded the specified value, and there are major affluence.%简要介绍了国产低合金钢09MnNiDR的特点，并对其焊接性进行了分析。针对陕西西宇无损检测有限公司承接的某低温球罐的焊接技术要求，对56 mm厚板09MnNiDR钢进行了焊接工艺评定，通过焊接工艺试验确定本次低温球罐的焊接工艺参数。结果表明，用W707DRQ焊条进行焊条电弧焊，焊缝的各项指标均满足设计要求，－70℃低温冲击韧性已超过规定值，且有较大的富裕量。