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针对热轧钢板产品常出现的旁弯、翘曲等板形质量问题,通过盲孔法测量钢板矫直前以及粗矫直、精矫直后的残余应力分布来分析矫直工艺对钢板残余应力分布的影响,以便改善热轧钢板产品的质量。实测结果表明:矫直前钢板宽度方向残余应力很不均匀,并且在钢板边部存在残余压应力使钢板出现边浪等板形不良的情况;经过粗矫直后应力值分布不均减小;在精矫直后应力值进一步减小并且分布趋于均匀。而同一矫直工序中钢板长度方向不同位置残余应力分布也不同,其中钢卷中部的残余应力值为最小。
Aiming at the quality problems of side-bending and warping of hot-rolled steel products, the residual stress distribution before and after rough straightening and straightening is measured by blind hole method to analyze the effect of straightening process on the residual stress distribution In order to improve the quality of hot rolled steel products. The measured results show that the residual stress in the width direction of the steel sheet before straightening is very uneven, and the residual compressive stress exists in the edge of the steel sheet to make the steel plate appear bad shape such as edge wave. The uneven distribution of stress value after rough straightening reduces. After straightening the stress value is further reduced and the distribution tends to be uniform. In the same straightening process, the distribution of residual stress in different positions along the length of the steel plate is also different, and the residual stress in the middle part of the coil is the smallest.