超低碳贝氏体WDB62 0钢是可焊性优良的高强度钢 ,通过对这类钢选用几种常用的可焊性试验方法进行的焊接接头性能试验和评定得出 ,WDB62 0钢的碳当量较低 ,焊接裂纹敏感性组分Pcm <0 2 0 % ,因此具有良好的可焊性 ,可采用不预热方式焊接 ,焊后可不采取后热措施 ,属于低焊接冷裂纹敏感性钢。针对水电站施工的多雨、潮湿的环境 ,提出了对焊材及焊接工艺的要求 Ultra-low-carbon bainite WDB62 0 steel is a high-strength steel with excellent weldability. Through the performance test and evaluation of the welded joints made of several commonly used weldability test methods for this type of steel, it is concluded that the carbon of WDB62 0 steel Low equivalent weight, Pcm <0 2 0% of the weld crack sensitive component, so it has good solderability, can be welded without preheating, post-weld without post-heating measures, and is a low-weld cold crack sensitive steel. In view of the rainy and humid environment of the hydropower station construction, the requirements for the welding consumables and the welding process are put forward