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在工程安装,机械零部件的维修、装配的各项工作中,经常碰到铸铁和碳钢的焊接问题。由于铸铁和碳钢的材质不同,在化学成份、机械性能、可焊性等各种性能上差别很大。焊接规范难以控制,加上铸铁强度低,塑性差,在焊接过程中由于受热不均匀和热胀冷缩与碳钢不同,焊接的残余应力所致,在焊接过程中易产生热裂纹和焊后冷裂纹,给焊接工作造成了困
In engineering installation, mechanical parts maintenance, assembly of the work, often encounter cast iron and carbon steel welding problems. Due to the different materials of cast iron and carbon steel, chemical composition, mechanical properties, weldability and other properties vary widely. Welding specifications difficult to control, coupled with low strength cast iron, poor plasticity, in the welding process due to uneven heating and shrinkage and carbon steel with different carbon steel, welding residual stress due to the welding process easy to produce hot cracks and welding Cold crack, causing the work of welding difficulties