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导致耐磨板400的分层缺陷的原因?

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:

分层缺陷是在剪切面上呈现一或多条平行的缝隙。它实质上是耐磨板内部存在有局部或整体的基本平行于耐磨板表面的未焊合界(层)面,它破坏了hardox450耐磨板厚度方向的连续性,有时缝隙中有肉眼可见的夹杂物。

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.

可能导致分层缺陷的原因有:在轧制过程中,钢中的非金属夹杂物因塑性变形由球状变为椭圆状,后变为片状,由于夹杂物与基体的结合力较弱,所以微小的应力就会使夹杂物和基体脱离,在界面上形成孔洞。

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.

导致Hardox450耐磨板的分层缺陷的原因?(图1)

随着变形的进行,孔洞长大、聚集,直至形成分层;钢坯中心区域的低熔质元素富集,硫的质量分数偏高的钢,中心偏析带内往往存在大量的硫化物聚集,使钢内产生夹杂性裂纹,形成分层;在进人轧制前钢坯内部存在有裂纹、疏松、缩孔等原始缺陷,在轧制过程中,由于变形条件不合适,内部缺陷不能完全焊合而产生分层。

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.

分层对hardox450耐磨板的质量影响取决于分层严重程度,如果分层较为弥散,对hardox450耐磨板的性能影响较小;如果分层较为密集,且有一定的长度和明显的宽度,将导致hardox450耐磨板的报废。

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.