摘要
采用不同抛丸时间、抛丸电流的抛丸工艺对高速铁路扣件用弹条原材料(60Si2Mn热轧弹簧钢)进行抛丸,弹丸为粒径0.6~0.7 mm的S230铸钢丸,并通过X射线应力测定仪测量60Si2Mn热轧弹簧钢表面残余应力。结果表明:经不同抛丸工艺处理后,热轧弹簧钢表面残余应力均为压应力;在抛丸电流相同抛丸时间减小、抛丸时间相同抛丸电流减小两种情况下,残余应力场特征参数(最大残余应力、最大残余应力对应的深度和残余应力影响深度)和半高宽(层深相同时)均减小,抛丸效果变差;抛丸覆盖率100%、抛丸时间16 s、抛丸电流50 A时,残余应力场特征参数和半高宽最大,抛丸效果最好。
This study investigates the influence of different shot blasting processes,varying in shot blasting times and currents,on the surface residual stress of 60Si2Mn hot-rolled spring steel—a key material for high speed railway fastening system components.Employing S230 cast steel shots with a particle diameter of 0.6~0.7 mm,the research utilized an X-ray stress tester to measure the surface residual stress under diverse shot blasting conditions.The findings reveal that,following various shot blasting treatments,the surface residual stress of hot-rolled spring steel consistently manifests as compressive stress.Under scenarios where the shot blasting current remains constant while the shot blasting time decreases,or where the shot blasting time remains unchanged but the shot blasting current decreases,there is a reduction in the characteristic parameters of the residual stress field(maximum residual stress,depth corresponding to the maximum residual stress,and depth affected by the residual stress)as well as the full width at half maximum(the same layer depth).This reduction indicates a decrease in shot blasting effectiveness.The most optimal shot blasting effect is achieved with a 100%coverage rate,a shot blasting time of 16 s,and a shot blasting current of 50 A,resulting in maximized characteristic parameters of the residual stress field and full width at half maximum,signifying the most favorable shot blasting outcome.
作者
张远庆
ZHANG Yuanqing(Tieke(Tianjin)Technology Co.Ltd.,Tianjin 301700,China)
出处
《铁道建筑》
北大核心
2024年第2期47-49,共3页
Railway Engineering
关键词
高速铁路扣件
60Si2Mn热轧弹簧钢
抛丸工艺
抛丸效果
残余应力
半高宽
fastening systems for high speed railway
60Si2Mn hot-rolled spring steel
shot blasting technology
shot blasting effect
residual stress
full width at half maximum
作者简介
张远庆(1978-),男,高级工程师。E-mail:zhang_yq@foxmail.com。
