摘要:
为了解决高锰钢备件使用寿命短、更换频繁和高铬铸铁及普通合金铸钢备件韧性低、脆性大和使用中易破断的难题,以廉价硅、锰为主要合金元素,并加入少量铬元素,同时用硼和氮改善铸钢淬透性,用钙、钛、钇基稀土和镁细化和净化凝固组织,开发了一种不含镍钼等昂贵合金元素,仅含0.25~0.60%C,1.0~1.5%Mn,0.4~1.2%Si,0.5~1.6%Cr,0.003~0.008%B,0.005~0.035%N,0.02~0.08%Ca,0.05~0.15%Ti,0.02~0.10%Y和0.02~0.10%Mg的廉价高强度耐磨马氏体钢,其抗拉强度大于1500Mpa,延伸率大于5%,冲击韧性大于120J/cm...
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