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Cr12Mo抗磨白口铸铁是Cr系抗磨白口铁中的一种,适用于薄壁及中等壁厚的零件上。本文用液淬法查明在凝固过程中,Cr在奥氏体枝晶及液体中的分布,在含Mo1.0％时生成低熔点共晶体。 在亚共品、共品、过共晶三种Cr12Mo白口铁中,碳化物形貌不同,过共晶Cr12Mo生成六角形锥状碳化物,同时具有晶体缺陷,在磨损过程中,此类碳化物易于脱落,而亚共晶Cr12Mo的碳化物呈共晶态分布于奥氏体周界上,不易脱落,经几种磨损试验证明,亚共晶(C 2.6～2.7％)Cr12Mo抗磨白口铁具有较好的抗磨性及韧性。生产实践验征亚共晶Cr12Mo抗磨白口铁比45号钢,抗磨能力提高6倍左右。
Cr12Mo anti-wear white cast iron is a Cr-based anti-wear white iron in one, suitable for thin-walled and medium wall thickness of the parts. In this paper, liquid quenching was used to determine the distribution of Cr in austenite dendrite and liquid in the solidification process. When the content of Mo was 1.0%, low melting point eutectic was formed. In Asian goods, common products, eutectic three kinds of Cr12Mo white iron, the carbide morphology is different, hypereutectic Cr12Mo hexagonal cone-shaped carbide, with crystal defects, in the wear process, such carbide Easy to fall off, while the hypoeutectic Cr12Mo carbide was eutectic distribution in the peritectic perimeter, not falling off, after several wear tests showed that hypoeutectic (C 2.6 ~ 2.7%) Cr12Mo anti-wear white iron Has good abrasion resistance and toughness. Subcrystalline eutectic Cr12Mo anti-wear white iron than 45 steel, anti-wear ability to improve about 6 times.