抗磨贝氏体球墨铸铁的研究与应用  

Research and application of wear-resistant milling balls of bainite ductile iron

作　　者：徐杨[1] 施焕儒[1] 简建明[1] 刘俊友[2] 

机构地区：[1]中国农业大学工学院,北京100083 [2]北京科技大学材料学院,北京100083

出　　处：《材料热处理学报》2008年第4期131-134,共4页Transactions of Materials and Heat Treatment

摘　　要：在Mn-Si球铁中加入Cu、Cr、B、Nb等合金元素,采用分级等温淬火工艺,用金属型铸造代替传统砂型铸造生产抗磨贝氏体球铁。结果表明：与传统方法生产的抗磨贝氏体球铁比较,新工艺使磨球的硬度提高3～5HRC,冲击韧度提高10%～20%,耐磨性提高20%～30%,磨球破碎率≤1%。当碳化物含量大于12%时,磨球的破碎倾向显著提高。After adding alloying elements of Cu, Cr, B and Nb into the Mn-Si spheroidal graphite iron, bainite ductile iron was produced by step quenching and a permanent molds process. As compared with milling balls made by traditional process, its hardness is increased by 3 - 5HRC, its impact toughness is increased by 10% - 20% , and its wear-resistant is improved by 20% - 30% . The crack rate of the milling balls is less than 1%. The crack rate of the milling balls increases when carbide content in the milling balls exceed 12% .

关 键 词：贝氏体球铁 分级淬火 金属型铸造 碳化物 磨球 

分 类 号：TG143.5[一般工业技术—材料科学与工程]