连杆用36MnVS4钢的胀断性能  

Fracture Splitting Properties of Steel 36MnVS4 for Connecting Rod

作　　者：师周龙[1,2] 邵成伟[2,3] 惠卫军[2] 张英建[2] 徐乐[2] 项金钟[1] 

机构地区：[1]云南大学物理科学技术学院,云南昆明650091 [2]钢铁研究总院先进钢铁材料技术国家工程研究中心,北京100081 [3]昆明理工大学,云南昆明650093

出　　处：《钢铁研究学报》2014年第4期42-45,共4页Journal of Iron and Steel Research

基　　金：国家863计划资助项目(2013AA031605)

摘　　要：对国内新开发的的胀断连杆用非调质钢36MnVS4性能进行了研究,结果表明,材料的显微组织为极细的铁素体+珠光体混合组织,钒等微合金化元素的加入使得晶粒更加细化;胀断结果显示,材料断口为典型的脆性解理断裂,胀断变形量很小,达到或超过传统C70S6胀断效果;碳含量的降低引起组织变化,改善了切削加工性能;材料的强度增加,屈强比也显著提高,对连杆的轻量化设计和可靠性有显著的意义,可以用于胀断连杆。The properties of the new development microalloyed steel 36MnVS4 for connecting rod were investigated. Results indicate that the developed steel has a fine grain ferrite pearlite mixed structure and the grain more refined with V element. The fracture surface was brittle cleavage fracture of simulated fracture splitting specimen. The distortion is smaller than that of conventional high carbon steel C70S6. Moreover, with lower carbon content, the development steel not only has higher yield strength ratio, but also has good cutting performance. It is significant to the lightweight design and reliability of the connecting rod, which suggests that the development steel can per form fracture splitting.

关 键 词：胀断 连杆 非调质钢36MnVS4 脆性断裂 显微组织 

分 类 号：TG142.1[一般工业技术—材料科学与工程]