D型石墨铸铁玻璃模具材料组织和性能的研究  

Microstructure and Properties of the D-type Graphite Materials for Glass Mold

作　　者：曹胜利[1] 程和法[1] 黄笑梅[1] 余瑾[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《铸造技术》2010年第1期12-16,共5页Foundry Technology

基　　金：安徽省科技攻关项目(07010202031)

摘　　要：研究化学成分和冷却速度对D型石墨铸铁微观组织、硬度、抗拉强度以及抗氧化性和抗热疲劳性的影响。实验结果表明,当铸铁的碳当量为4.24%～4.26%时,通过控制Si/C比和加入少量Cu、Cr等合金化元素、适当提高冷却速度,可以获得具有D型石墨组织的铸铁,其抗拉强度可达290 MPa,与普通灰铸铁相比,D型石墨铸铁具有良好的抗氧化和抗热疲劳性。The effects of chemical composition and the cooling rate on on the microstructure, hardness, tensile strength, oxidation resistance and thermal fatigue of D-type graphite cast iron are researched in this paper. The experimental results show that when the carbon equivalent of the gray iron is in the range of 4.24% -4.26%, the D-type graphite can be obtained in the microstructure of gray by adding a small amount of Cu, Cr element and controlling Si/C ratio, or by increasing the cooling rate. The tensile strength is larger than 290 MPa, and the oxidation resistance as well as thermal fatigue resistance are improved significantly compared with the gray iron with flake graphite.

关 键 词：D型石墨铸铁 化学成分 氧化性 热疲劳性 

分 类 号：TG143.5[一般工业技术—材料科学与工程]