Abstract

State Standard GOST 4543–2016 stipulates for more stringent requirements of ghost line (contour) macrostructure defects for alloyed steel. State Standard GOST 4543–71 allowed the existence of the defect in extra high-quality steel not higher than 3 points according to the scales in State Standard GOST 10 243. Ghost line was not specified for hot-rolled quality and high-quality steel. While monitoring the macrostructure of such steel in the metal technology laboratory, OAO Byelorussian Steel Works, management company of Byelorussian Metallurgical Company, the ghost line (contour) defect is identified from time to time. In order to determine the causes of occurrence of this defect in high-quality hot-rolled workpieces, samples of various grades were analyzed. The studies of templates with the ghost line macrostructure defect are described, as well as the activities performed by the electric melting shop and technical department focused on the adjustments of electromagnetic stirring upon steel casting to prevent formation of the defect.

中文翻译：

---

确定鬼线（轮廓）宏观结构缺陷的形成原因

摘要

国家标准 GOST 4543-2016 对合金钢的鬼线（轮廓）宏观组织缺陷提出了更严格的要求。国标GOST 4543-71允许特优钢按照国标GOST 10 243的尺度存在不高于3点的缺陷。热轧优质钢和优质钢没有规定鬼线。白俄罗斯冶金公司管理公司OAO白钢厂金属技术实验室在监测此类钢的宏观组织时，不时发现鬼线（轮廓）缺陷。为确定优质热轧工件出现这种缺陷的原因，对不同牌号的样品进行了分析。描述了具有鬼线宏观结构缺陷的模板的研究，