ER7车轮钢的K_Q值试验结果与分析  

K_Q Test Result and Analysis of ER7 Railway Wheel Steel

作　　者：王丽英[1] 李伟[1] 

机构地区：[1]太钢不锈钢股份有限公司技术中心,山西太原030003

出　　处：《物理测试》2010年第4期33-36,共4页Physics Examination and Testing

摘　　要：通过对ER7车轮钢断裂韧性试验的分析总结得出:ER7车轮钢的KQ值较高时,试验结果会受到试验参数设置的影响,具有不确定性,断口上也会出现明显的塑性变形带,晶粒细化、均匀,先析出铁素体均匀分布于珠光体周围是提高车轮钢KQ值的关健。Fracture toughness test of ER7 steel was analyzed . The results show that Ko factor is influenced by test parameter setting when KQ factor is bigger, and uncertainty and plastic deformation band are obviously appeared. It is important to improve KQ factor with fine, homogenous grain size and ferrite around grain boundaries of pearlitic.

关 键 词：车轮钢 KQ值 断裂韧性 

分 类 号：TG115.5[金属学及工艺—物理冶金]