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1绪言分层是存在于钢材中的一种常见缺陷,也是一种不允许存在而实际上又存在的缺陷。分层随产生原因的不同,其表现的部位形态也不同,概括起来有两种形式: 第一种为开口型分层。这种分层在钢板断口上宏观就可发现;在微观视场中如一个裂口,即属开口型分层。这种分层缺陷,通常在钢厂和制造厂里基本上都能被查检出来。在本文中不作赘述。第二种系封闭型分层。这种分层缺陷在钢材的断口看不到;在制造厂中,如果不进行逐张钢板100%超声波探伤,也难以表现。它是一种处于钢板内部的封闭性分层。这种分层缺陷从冶炼钢厂带到制造厂;最后被加工制造成产品出厂。
1 INTRODUCTION Stratification is a common defect that exists in steel and is a defect that does not actually exist but actually exists. Stratification with the different causes, the performance of the site shape is also different, summed up in two forms: The first is open-type stratification. This stratification can be found macroscopically on the fracture surface of the steel plate. As a crack in the microscopic field of view, it is an open-type delamination. This layering defect, which is usually found in steel mills and manufacturing plants, is basically checked. This article will not repeat them. The second type of closed-type stratification. Such delamination defects can not be seen in the fracture of the steel; in the manufacturing plant, it is hard to show without 100% ultrasonic flaw detection. It is a closed stratification inside the steel plate. This delamination defect from the smelting steel plant to the manufacturer; finally processed into products manufactured.