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木纹状断口不仅在铬镍钢中出现,而且在铬锰硅、铬钼铝、硼、铬钼钢等亦出现,除合金结构钢外,碳素结构钢,甚至耐热不锈钢也均存在,见图1(图版48)。由此可见木纹状断口(即层状断口之一)是较为常见的缺陷。本文对木纹状断口的本质、成因以及对机械性能的影响作了初步研究。一、木纹状断口的分布规律及特征为了观察木纹状断口在钢锭中的分布规律,分别在钢锭的头、中、尾三个部位取样。大量的统计表明木纹状断口多产生在尾部偏析区内,一般可发展到中部,头部很少
Woody fractures not only appear in chrome-nickel steel, but also occur in chrome-manganese silicon, molybdenum-chromium-aluminum, boron, chromium-molybdenum steel, etc. In addition to alloy structural steel, carbon structural steel and even heat- See Figure 1 (Plate 48). This shows that the wood-like fracture (ie, one of the layered fracture) is a more common defect. In this paper, the nature of the wood-grain fracture, the origin and the impact on mechanical properties made a preliminary study. First, the distribution characteristics and characteristics of the wood-like fracture In order to observe the distribution of wood-like fracture in the ingot, respectively, in the ingot head, middle and tail three parts sampling. A large number of statistics show that wood-like fractures occur in the tail segregation area, the general can be developed to the middle of the head rarely