碳当量对高压油缸端盖球铁件组织性能的影响  

Effects of Carbon Equivalent on Microstructure and Properties of High Pressure Oil Cylinder Cover of Ductile

作　　者：孙斐[1,2,3] 庄晔[1,3] 邱永宁 孙祥广 周正寿[1,3] 胡静[1,3] 

机构地区：[1]常州大学江苏省材料表面工程技术重点实验室,江苏常州213164 [2]常州轻工技术职业学院机械工程系,江苏常州213164 [3]江苏恒立高压油缸股份有限公司,江苏常州213134

出　　处：《铸造技术》2015年第12期2927-2929,共3页Foundry Technology

基　　金：江苏省科技成果转化资助项目(BA2013078)

摘　　要：浇注了不同碳当量的高压油缸端盖球铁件,采用金相、拉伸和硬度测试方法,分析了铸件石墨形态、球化率和力学性能。研究结果表明：碳当量在4.03%～4.17%范围时,随着碳当量的升高,石墨的圆整度明显增加;当碳当量达到4.31%时,石墨出现衰退现象。碳当量为4.17%时,高压油缸端盖铸件的抗拉强度和硬度值达到峰值,分别为585 MPa和234 HB。高压油缸端盖铸件的屈服强度随着碳当量的增加呈减小趋势,碳当量从4.03%增加到4.31%时,屈服强度从480 MPa降至358 MPa。High pressure oil cylinder covers of ductile with different carbon equivalent（CE） were casted. The microstructure,hardness profile, tensile strength and yield strength were investigated. The results show that the roundness of graphite increases with the increasing of CE from 4.03% to 4.17%. Graphite turns to flag while CE is 4.31%. Tensile strength and hardness of high pressure oil cylinder cover reach the peak of 585 MPa and 234 HB while CE is 4.17%. When CE increases from 4.03% to 4.31%, the yield strength reduces from 480 MPa to 380 MPa

关 键 词：碳当量 高压油缸端盖 显微组织 抗拉强度 屈服强度 

分 类 号：TG255[金属学及工艺—铸造]