我厂铸钢车间生产铁路车辆低碳钢铸件毛坯,上半年废品急剧增加(见表1),铸件判废原因主要是裂纹和气眼。对ZG25钢为主的铸件来说,产生热裂倾向又较冷裂严重得多,尤以大件摇枕、侧架裂纹为 I plant cast steel plant production of low-carbon steel castings railway vehicles rough, a sharp increase in the first half of the waste (see Table 1), the main reason for casting foundry was cracked and eye irritation. ZG25 steel-based castings, hot cracking tendency is much more serious than the cold crack, especially large bolster, side frame cracks as