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通过对铸渣机铜渣模工作状态分析,确定其主要失效形式是热疲劳损伤和破坏,由此选择退火铁素体球墨铸铁QT400-15作为铜渣模材质;通过合理设计化学成分范围,并采用两种铸造工艺方案进行对比试验。经加强治炼、球化、孕育和热处理工艺控制,研制了稀土镁球墨铸铁铜渣模,已在某有色金属冶炼厂装机使用,可消除早期开裂现象,减少停机时间,提高生产效率,使用寿命提高50%以上。
Through analyzing the working condition of copper slag mold of slag casting machine, the main failure mode is determined by thermal fatigue damage and destruction, so the selected annealed ferritic ductile iron QT400-15 is used as the copper slag mold material. By reasonably designing the chemical composition range and Using two casting process comparison test. By strengthening the refining, balling, gestation and heat treatment process control, developed a rare earth magnesium cast iron ductile iron mold, has been installed in a non-ferrous metal smelter installed to eliminate early cracking phenomenon, reduce downtime and improve production efficiency and service life Increase by 50% or more.