高速重载列车车轴用钢EA4T的低温韧度  

Low Temperature Toughness of High Speed and Over Loaded Trains Axle Steel EA4T

作　　者：邹静[1] 雷旻[2,3] 吴刚[1] 张彩红[1] 江伟[1] 

机构地区：[1]六盘水师范学院,贵州六盘水553000 [2]贵州大学材料与冶金学院,贵州贵阳550003 [3]贵州省材料结构与强度重点实验室,贵州贵阳550003

出　　处：《铸造技术》2016年第4期653-654,665,共3页Foundry Technology

基　　金：科技部《科技人员服务企业行动项目》资助项目(2009GJF20026)

摘　　要：将经过高温系列回火的EA4T钢试样加工成夏比V型缺口冲击试样,通过低温系列冲击试验对EA4T钢的低温韧度进行了研究。结果表明,EA4T钢经880℃油淬,650℃回火后的冷脆转变温度为-97.37℃至-117.59℃,且在0℃至-80℃冲击时,其A_(KV)基本高于150 J,断口韧性断裂特征明显,表明EA4T钢具有良好的抗冷脆转变能力。Preparing Charpy V type impact samples of steel EA4T tempered at a series of tempering ,the low temperature toughness of steel EA4T was researched by a series of low temperature impact test on above samples. The result show that, after 880 ℃ oil quenching and 650 ℃ tempering, the ductile-brittle transition temperature range of domestic EA4T steel is from 97.37 ℃ to 117.59 ℃. And during the impact of 0 ℃ to -80 ℃, its Arv is basically higher than 150 J with an obvious characteristic of ductile fracture, which shows that EA4T steel possesses a better capability of brittle-resistance tempering.

关 键 词：EA4T钢 冷脆转变温度 冲击韧度 

分 类 号：TG161[金属学及工艺—热处理] TG142.1[金属学及工艺—金属学]