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铸态高强度高韧性QT600-10球墨铸铁控制技术
Control Technology of Cast High Strength and Toughness QT600-10 Ductile Iron Casting
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- DOI:
- 作者:
- 程建龙
CHENG Jianlong
- 作者单位:
- 安徽神剑科技股份有限公司
Anhui Shenjian Technology Co., Ltd., Hefei 230022,China
- 关键词:
- 铸态高强度高韧性 铸态QT600-10 合金化 硅固溶强化
as-cast high strength and toughness QT600-10as-cast qt600-10 alloying silicon solid solution enhancement
- 摘要:
- 以铸态QT600-10材质生产技术为例,简要介绍了铸态高强度高韧性球墨铸铁件控制要点:根据铸件壁厚条件,碳(C)控制在3.6%~3.8%、硅(Si)2.5%~2.8%、锰(Mn)<0.3%,采用微合金化时,控制铜(Cu)0.20%~0.50%、锡(Sn)0.02~0.05%。熔炼时采用C高Si低,CE适中,Mn、S、P低,采用低稀土Si-Mg6-8RE1-5球化剂,采用常规75SiFe孕育剂或长效孕育剂,通过控制基体组织比例,达到高强度高韧性铸态QT600-10的要求。The production techniques of as-cast QT600-10 is discussed. The main points of as-cast ductile iron castings with high strength and toughness are briefly recommended. According to the wall thickness of castings,the main chemical constituents are as follows,C 3.6%~3.8%, Si 2.5%~2.8%、Mn<0.3%, the microalloying elements copper and tin are Cu0.20%~0.50% and Sn 0.02%~0.05%. The melt contains high carbon and low silicon, the carbon equivalent is moderate.Spheroidizing treatment with low RE Si-Mg6-8 RE1-5, Inoculation treatment with conventional 75 SiFe inoculant or long-acting inoculant. By controlling the ratio of ferrite to pearlite in matrix structure, high strength and toughness of as-cast QT600-10 can be obtained.