摘要
以铬锰铜合金白口铸铁的铸态材料为对比材料,考察了热处理后的铬锰铜合金白口铸铁材料的耐磨性能,对试验材料的磨损失效机理和磨损端面与无磨损端面的金相组织进行了分析。结果表明,在相同的磨损条件下,水冷和空冷后的铬锰铜合金白口铸铁的耐磨性能分别是铸态的1.11倍和1.20倍;这是因为前两者组织中碳化物的硬度较之后者的高且碳化物分布均匀,发挥了抗磨犁作用,保护了基体,同时基体中存在的可转变为马氏体的具有良好弹塑性的残余奥氏体反过来又保护了碳化物,这样就更有效地减缓了磨损时的材料损失。这些原因可有针对性地为提高耐磨性能选择热处理制度提供参考。
The wear resistance of Cr-Mn-Cu alloy white cast iron after heat treatment was studied and compared with that of as-cast Cr-Mn-Cu alloy white cast iron, the wear failure mechanism and microstructure on the wear end surface and non-wear end surface were analyzed. The results show that under the same wear condition, the wear resistance of Cr-Mn-Cu alloy white cast iron through water cooling and air cooling are 1. 11 and 1.20 times bigger than that in as-cast condition. The hardness of carbides at water cooling and air cooling condition is larger than that in as-cast condition and the carbides is distributed more uniformly, thus play a significant role in wear resistant and protect the matrix. Meanwhile, the residual austenite in the matrix, which has good elongation and can be transformed into martensite, can protect carbide, Consequently, it reduces the wear loss more effectively. The study can provide some reference for selecting heat treatment technology to improve wear resistance property.
出处
《铸造技术》
CAS
北大核心
2007年第3期337-340,共4页
Foundry Technology
关键词
铬锰铜合金白口铸铁
热处理
干摩擦
耐磨性能
Cr-Mn-Cu alloy white cast iron
Heat treatment
Dry friction
Wear resistant
