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一、前言 20冷拔无缝钢管,是我省重要的钢铁产品之一。多年来在钢管生产中,反映出部分管坯质量不稳定,表现为毛管外废率和总外折率高,相应的金属消耗也高,同时钢管使用的可靠性也不十分稳定。针对20钢坯(管)的质量问题,联合试验组先后对三批共58炉20钢坯(管)的生产工艺流程及产品质量进行了试验研究。本文主要就20管坯、毛管的缺陷作初步探讨。二、试验内容在20钢管的生产过程中,管坯的质量问题首先集中表现在热轧毛管的外折缺陷上。为此,在各项常规检验基础上,我们着重对
I. INTRODUCTION 20 Cold drawn seamless steel pipe is one of the important steel products in our province. Over the years in the steel production, reflecting the unstable quality of some of the tube, the performance of the tube and the total rate of the outer wrap rate, the corresponding metal consumption is high, while the reliability of the use of steel is not very stable. In view of the quality problems of 20 billet (pipe), the joint test group successively carried out experimental research on the production process and product quality of 58 billet of 58 billet (tube) of three batches. This paper mainly on the 20 billet, capillary defects for a preliminary discussion. Second, the test content In the 20 steel pipe production process, the quality of the first focus on the quality of the hot-rolled capillary tube over the defect. For this reason, we emphasize on the basis of various routine tests