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浙江大学材料系金属材料工程教研室和浙江金华农机修造厂自1972年开始对球墨铸铁曲轴进行两阶段加热快速正火热处理的研究,通过实验室系统试验的探索和工厂生产实践的应用,确定了一个适合190、195球铁曲轴的热处理工艺规范,即在 750~760℃保温 60分钟后,再随炉升温到900—920℃,不保温立即出炉正火,然后再经600℃~620℃保温60分钟的回火。
Materials Department of Zhejiang University Department of Materials Engineering and Zhejiang Jinhua Agricultural Machinery Factory since 1972 on the ductile iron crankshaft two-stage heating rapid normalization heat treatment through the laboratory system testing and factory production practice application to determine a Suitable for 190,195 ductile iron crankshaft heat treatment process specifications, that is, at 750 ~ 760 ℃ for 60 minutes, and then with the furnace temperature to 900-920 ℃, immediately heated without firing normalizing, and then by 600 ℃ ~ 620 ℃ insulation 60 Tempering in minutes.