35冷轧钢在应力作用下的磁学特征  

Magnetic Characteristics of Stressed 35 Cold Rolled Steel Component

作　　者：任尚坤[1] 任吉林[1] 宋凯[1] 杨雅玲[1] 

机构地区：[1]南昌航空大学无损检测技术教育部重点实验室,江西南昌330063

出　　处：《机械工程材料》2008年第3期16-18,共3页Materials For Mechanical Engineering

基　　金：航空科学基金资助项目(06ZF56009)

摘　　要：测量了35冷轧钢经不同的拉应力作用后,在40 kA.m-1外磁场作用下,端点表面剩余磁感应强度和矫顽力随拉应力的变化关系。结果表明:当外作用拉应力小于材料的屈服强度时,不同拉应力产生的残余应力对端点表面剩余磁感应强度和矫顽力的影响很小;当拉应力接近屈服强度或大于屈服强度时,端点表面剩余磁感应强度和矫顽力将急剧增加发生跃变。可以利用端点表面剩余磁感应强度和矫顽力在屈服点附近发生突变的性质对材料的受力状态和疲劳损伤状况进行探测,能够对负载是否已超出材料屈服强度进行有效判断。The relationships of residual magnetization of end surface and coercive force with different stresses of 35 cold rolled steel ferromagnetic items were measured,ia a maximum field of 40 kA·m-1.When the stress is smaller than the yield point of the material,residual magnetization of end surface and coercive force of material produced by different residual stresses almost remaine constant.However,when stress is greater than yield point of the material,the residual magnetization of end surface and coercive forc...

关 键 词：无损检测 应力集中 磁学特征 铁磁试样 

分 类 号：TG335.12[金属学及工艺—金属压力加工]