Analysis of the correspondence between Q390 billet crack and rolling defect
The hairline defect of Q390 hot-rolled seamless steel pipe has always been one of the important reasons affecting the first pass rate and yield index of the steel pipe.The main cause of hairline defects is related to the quality of continuous casting billets.This article analyzes the genetic correspondence and defect variation be-tween billet crack defects and rolling defects through rolling experiments,and analyzes the variation of decarburiza-tion layer from billet to finished product.
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