所属分类：公司动态 发布时间：2020-12-10 14:14:21 来源：http://www.lcnmb500.com 浏览量：
Delamination defect is one or more parallel cracks on the shear plane. It is essentially that there are local or integral non welded interface (layer) in hardox450 wear-resistant plate, which is basically parallel to the surface of hardox450 wear-resistant plate. It destroys the continuity of hardox450 wear-resistant plate thickness direction, and sometimes there are inclusions visible to the naked eye in the gap.
The possible causes of delamination defects are as follows: in the rolling process, the non-metallic inclusions in the steel change from spherical to elliptical due to plastic deformation, and then become flakes. Due to the weak binding force between inclusions and matrix, small stress will separate inclusions from matrix and form holes on the interface.
With the deformation going on, the holes grow and gather until delamination is formed; the low melting elements in the center of the billet are enriched, and a large amount of sulfide tends to accumulate in the center segregation zone of the steel with high sulfur content, resulting in inclusion cracks and delamination in the steel; Before rolling, there are cracks, porosity, shrinkage cavity and other original defects in the billet. In the rolling process, due to the improper deformation conditions, the internal defects can not be completely welded, resulting in delamination.
The effect of delamination on the quality of hardox450 wear-resistant plate depends on the severity of delamination. If the delamination is dispersed, the impact on the performance of hardox450 wear-resistant plate is small; if the delamination is dense, and has a certain length and obvious width, it will lead to the scrapping of hardox450 wear-resistant plate.