Fe_3Al基合金的堆焊工艺试验研究

Investigation on Overlaying Welding Process of Fe_3Al-based Alloy

采用钨极氩弧焊(GTAW)方法在1Cr18Ni9不锈钢基体上进行Fe3Al合金堆焊性试验,结果表明:在焊接电流为80A,焊接电压为13～15V,预热温度为150℃,焊接速度为1.5mm/s,单道焊,焊后空冷条件下,可以在不锈钢基体上得到高硬度且韧性较好的堆焊层,且焊缝成形良好,表面无延迟裂纹出现。

An overlaying welding property experiment with stainless steel as base metal was conducted by using GTAW process, the welding flux is homemade Fe3Al alloy. The results show that high hardness and moderate toughness can be attained with such welding conditions as welding current of 80A, voltage of 13～15V, velocity of (1.5)mm/s, preheating temperature of 150℃, singly layer welded, air cooling after welding,and the weld is well fabricated and no delayed cracking is found on its surface.