硅固溶强化球墨铸铁的生产工艺及应用

Production Technology and Application of Silicon Solid Solution Strengthened Nodular Iron

从化学成分选择、熔炼工艺、球化处理及孕育处理工艺等方面详细介绍了硅固溶强化铁素体球墨铸铁的生产工艺,通过在标准试棒上进行试验,得到了符合技术要求的球墨铸铁材料,将该工艺应用到轴承盖铸件上进行了两批次的生产,其铸件本体的金相组织和力学性能符合QT600-10的技术要求。最后指出:通过将碳当量控制在4.4%~4.6%,采用合理的球化和孕育处理工艺,可以生产出满足标准要求的硅固溶强化铁素体基体的QT600-10牌号的试样和轴承盖,且轴承盖铸件本体硬度均匀;与传统工艺相比,硅固溶强化工艺生产的轴承盖铸件各项力学性能均有所提高。

The production process of silicon solid solution reinforced ferritic nodular iron was introduced in detail from the aspects of chemical composition selection,smelting process,nodularization treatment and inoculation treatment process.Nodular iron material that met the technical requirements was obtained by conducting tests on standard test bars.The process was applied to the bearing cap castings for two batches.And the metallographic structure and mechanical properties met the technical requirements of QT600-10.Finally,it was pointed out that by controlling the carbon equivalent at 4.4%~4.6%,and adopting a reasonable nodularization and inoculation treatment process,it was possible to produce QT600-10 grade samples and bearings that met the requirements of the standard.The hardness of the bearing cap casting body was uniform.Compared with the traditional process,the mechanical properties of the bearing cap casting produced by the silicon solid solution strengthening process were improved.