球墨铸铁QT800-6正火处理工艺研究  

Study on Normalizing Technology for Nodular Cast Iron QT800-6

作　　者：张扬扬[1] 孙有平[1] 周学浩[1] 付静[1] 申其芳[1] 

机构地区：[1]广西科技大学机械工程学院,广西柳州545006

出　　处：《铸造技术》2017年第1期65-67,共3页Foundry Technology

基　　金：广西制造系统与先进制造技术重点实验室开放基金资助项目(13-051-09S10)

摘　　要：利用光学显微镜、硬度试验机、拉伸试验机以及箱式电阻炉设备,研究了不同正火处理工艺对球墨铸铁QT800-6力学性能的影响。结果表明:正火工艺处理后,球铁基体组织中的铁素体向珠光体转变后组织为少量铁素体基体+珠光体+球状石墨。大多数的铁素体转变为珠光体,珠光体数量在基体组织中大大增加,正火温度860℃保温1 h风冷获得的球墨铸铁具有良好的综合力学性能。The effect of different normalizing process on the mechanical properties of nodular cast iron QT800-6 was studied by means of optical microscope, hardness tester, tensile testing machine, box-type resistance furnace. The results show that, after normalizing treatment, the ferrite in matrix microstructure transforms into pearlite and its microstructure is a small amount of ferrite ＋ pearlite ＋ nodular graphite. A mount of ferrite transforms into peatlite to result in the peatlite in the matrix increasing. The nodular cast iron QT800-6 with good comprehensive mechanical properties can be obtained after normalizing at 860 ℃ for 1 h, wind cooling.

关 键 词：球墨铸铁 正火 显微组织 力学性能 

分 类 号：TG164.2[金属学及工艺—热处理]