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四、稀土镁球墨铸铁零件的热处理目前我厂稀土镁球墨铸铁零件,除凸轮轴采用等温淬火外,其余零件全部采用正火热处理工艺。
Fourth, the heat treatment of rare earth magnesium nodular cast iron parts At present, I plant rare earth magnesium nodular cast iron parts, except camshaft isothermal quenching, the rest of the parts are all normalizing heat treatment process.