non-preheat相关论文
A new type of non-preheated hardfacing electrode was developed using H08A as the core and the coat contents including fe......
研究了T91钢薄壁管的焊接工艺,通过理论分析和模丰以工况试验说明,对于T91钢薄壁管的焊接,采用GTAW方法,不进行焊前预热,焊后时效处理,焊......