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    • 9. 发明专利
    • Iron casting and method for manufacturing the same
    • 铁铸件及其制造方法
    • JP2013227598A
    • 2013-11-07
    • JP2012098564
    • 2012-04-24
    • Kogi Corp虹技株式会社
    • FUJIO KAZUKINISHIKAWA SUSUMU
    • C22C37/06B22D27/04B22D27/20C21D5/00
    • PROBLEM TO BE SOLVED: To provide an iron casting that is an alloyed cast iron free of W, Ni, Co, Nb and the like, hardly causes a quenching crack, shows a prescribed high hardness and is excellent in wear resistance due to the presence of a large amount of martensite structure and a small amount of retained austenite, without performing tempering for a plurality of times, and is suitable for a thick iron casting, and a method for manufacturing the same.SOLUTION: An iron casting has a composition comprising, by wt.%, 1.0-2.5% C, 0.2-1.5% Si, 0.2-1.5% Mn, 5.0-9.0% Cr, 0.8-2.5% Mo, 0.1-0.7% V and the balance being Fe, has a structure wherein martensite phase occupies ≥80% of a base and metal carbides are dispersed, and has a hardness of ≥74 Hs.
    • 要解决的问题:为了提供不含W,Ni,Co,Nb等的合金铸铁的铁铸件,几乎不引起淬火裂纹,显示出规定的高硬度,并且由于存在而具有优异的耐磨性 大量的马氏体组织和少量的残余奥氏体,而不进行多次回火,适用于厚铁铸件及其制造方法。一种铁铸件,其组成包括: ,重量%,1.0-2.5%C,0.2-1.5%Si,0.2-1.5%Mn,5.0-9.0%Cr,0.8-2.5%Mo,0.1-0.7%V,余量为Fe,具有结构 其中马氏体相占据基底的80%以上,金属碳化物分散,硬度≥74Hs。