硼对Cr20白口铸铁组织和性能的影响  

Effect of boron on structures and properties of high chromium white cast iron

作　　者：曹海叶[1] 辛啟斌[1] 王琳琳[1] 穆晶[1] 龙海明[2] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004 [2]鞍山钢铁公司冷轧厂,鞍山114021

出　　处：《材料与冶金学报》2010年第1期57-61,共5页Journal of Materials and Metallurgy

基　　金：辽宁省镁资源保护办2009年资助项目

摘　　要：从减少Mo,Ni等贵重金属含量、降低生产成本和提高耐磨性的角度出发,对KmTBCr20Mo进行以硼替代部分Mo,Ni的试验,研究硼对Cr20白口铸铁组织及性能的影响.试验结果表明：硼显著提高了试样的铸态硬度,对热处理态硬度影响不大;硼的质量分数在0.1%~0.7%间变化时,随着硼含量的增加,试样的组织由亚共晶态向过共晶态过渡,试样的冲击韧性下降,耐磨性在硼的质量分数为0.32%时相对较好.From the view of decreasing the contents of Mo,Ni and other precious metal elements,reducing production costs and increasing wear-resistance,an experiment study for adding boron to substitute partial Mo and Ni in KmTBCr20Mo has been conducted and the effect of boron on 20-chromium white cast iron were investigated.The results showed that the addition of boron increased the hardness of cast samples,but no marked effect has been found in the samples after heat treatment.In the boron content range of 0.1 to 0.7（mass,%）,the microstructure of the samples may transit from the hypoeutectic to hypereutectic state,and the impact toughness decreased as the boron content increased.Wear resistance was satisfactory when boron content was 0.32%.

关 键 词：Cr20白口铸铁 硼 力学性能 耐磨性 

分 类 号：TG143.9[一般工业技术—材料科学与工程]