Mechanism investigation and strategies for reducing residual stress at open ends of the roll-formed part  

作　　者：XU Dongkai SHI Lei XIAO Hua 

机构地区：[1]Research Institute,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China [2]State Key Laboratory of Development and Application Technology of Automotive Steels(Baosteel),Shanghai 201999,China

出　　处：《Baosteel Technical Research》2023年第3期25-31,共7页宝钢技术研究（英文版）

摘　　要：Increasing geometrical accuracy at open ends of the roll-formed part is difficult due to the release of residual stress after end cutting.In this work,a typical rail with a high requirement of geometry accuracy was selected to realize the behaviors of residual stress release.First,residual stress distribution after roll forming is discussed in detail by finite element analysis with ABAQUS.In addition,two different approaches are proposed to check their capabilities in reducing the residual stress level.The results indicate that both additional rolling passes and multiple bending processes are beneficial to reducing uniform residual stress.

关 键 词：roll forming ultra-high-strength steel residual stress 

分 类 号：U466[机械工程—车辆工程] TG306[交通运输工程—载运工具运用工程]