在内燃机车制造厂,将许多灰铸铁及高强度球铁的支架另件改为蠕虫状石墨铁件,并进行了蠕铁焊接性能的研究,设计和掌握了这种铸铁件缺陷焊补的工艺。正如对蠕铁焊接性能进行研究所表明的那样,蠕铁较球铁在焊缝周围区域中形成淬火组织的倾向较小,并且有较好的焊接性 In the locomotive manufacturing plant, many gray cast iron and high-strength ductile iron parts were replaced by worm-shaped graphite iron parts, and the performance of vermicular iron welding research, design and master of this cast iron defects welding repair process . As the study of vermicular iron welding performance shows, the tendency of vermicular iron to form quenched tissue in the area around the weld is less than that of ductile iron, and has better weldability