摘要
为减少奥氏体铸铁中镍的添加量,研究了3种不同镍含量的Fe-13Mn-3.5C-3Si-3Cu-xNi高锰奥氏体球墨铸铁。铸铁经固溶处理后,奥氏体基体上的碳化物数量随镍含量的降低增多,抗拉强度、抗弯强度、伸长率以及冲击韧度均下降。镍含量为4%和8%时,铸铁表现出优异的综合力学性能,其较高的强度和塑性源于形变过程中的TWIP效应。随着镍含量从8%降为0,铸铁的摩擦系数和磨损率先增大后减小,其主要磨损机理由粘着磨损变为磨粒磨损。研究表明,为保证奥氏体球铁的综合性能,合金中需保留少量的镍元素。
In order to decrease the nickel content in austenite cast iron and reduce alloy cost, the Fe-13Mn-3.5C-3Si-3Cu-xNi （x = 8% ,4% ,0） high-Mn austenite ductile cast iron with three different nickel contents were prepared and studied. The results show that, after solution treatment, as the nickel content decreases, the carbide amount in austenite matrix increases and the tensile strength, elongation, flexural strength and impact toughness all declines. When the nickel content is 4% and 8%, the cast irons possess excellent comprehensive mechanical properties, and the high strength and plasticity results from TWIP effects in the process of deformation. As nickel content decreases from 8% to 0, the friction coefficient and the wear rate of the cast irons increase first, and then decrease, the main wear mechanism changes from adhesive wear to abrasive wear. A few content nickel in the alloy should be kept for ensuring the comprehensive properties of the ductile cast iron.
出处
《铸造技术》
CAS
北大核心
2011年第12期1669-1672,共4页
Foundry Technology
基金
福建省高校产学合作科技重大项目(2011H6012)
福建省自然科学基金(2011J01292)
关键词
高锰奥氏体球铁
镍含量
力学性能
摩擦磨损
耐腐蚀性
High-Ma austenite nodula
Nickel content
Mechanical property
Friction and wear
Corrosion resistance
