Wear-resistant composite steel plate cladding layer with cracks is qualified?


Release time:

2022-06-15

Cracks on the surface of wear-resistant composite steel plate are normal, and the absence of cracks is not in line with technical requirements. However, most people want the surface cracks of the cladding layer to be large in number, small in shape, irregular in distribution, and the depth of cracks is limited to the cladding layer. Cracks are allowed on the surface of the wear-resistant steel plate, but they shall not penetrate deep into the mother plate. Its main purpose is to ensure the wear resistance of the composite steel plate surfacing layer and the safety of actual use. Unreasonable surfacing process may lead to the formation of continuous, penetrating large cracks on the surface of the composite steel plate. Such large cracks may penetrate deep into the mother plate and cause great harm. The general thickness of the mother plate of the cladding composite steel plate is 10 mm, and the actual toughness zone metal is reduced by about 20 ~ 30% after cladding. If the surface cracks continue to extend downward across the molten layer, the strength of the mother plate will be reduced, and the more serious will lead to the fracture of the composite steel plate. According to relevant research, the more cracks in the cladding layer, the smaller and wider the distribution, the more complete the welding stress release, the smaller the deformation of the mother plate after welding, the safer to use. In addition, if there is no crack or few cracks on the surface of the wear-resistant composite steel plate, it is regarded as a substandard product, because the surface hardness and abrasion resistance of the surfacing layer do not meet the technical requirements.

Cracks on the surface of wear-resistant composite steel plate are normal, and the absence of cracks is not in line with technical requirements. However, most people want the surface cracks of the cladding layer to be large in number, small in shape, irregular in distribution, and the depth of cracks is limited to the cladding layer. Cracks are allowed on the surface of the wear-resistant steel plate, but they shall not penetrate deep into the mother plate. Its main purpose is to ensure the wear resistance of the composite steel plate surfacing layer and the safety of actual use.
  
Unreasonable surfacing process may lead to the formation of continuous, penetrating large cracks on the surface of the composite steel plate. Such large cracks may penetrate deep into the mother plate and cause great harm. The general thickness of the mother plate of the cladding composite steel plate is 10 mm, and the actual toughness zone metal is reduced by about 20 ~ 30% after cladding. If the surface cracks continue to extend downward across the molten layer, the strength of the mother plate will be reduced, and the more serious will lead to the fracture of the composite steel plate.
  
According to relevant research, the more cracks in the cladding layer, the smaller and wider the distribution, the more complete the welding stress release, the smaller the deformation of the mother plate after welding, the safer to use. In addition, if there is no crack or few cracks on the surface of the wear-resistant composite steel plate, it is regarded as a substandard product, because the surface hardness and abrasion resistance of the surfacing layer do not meet the technical requirements.

 

 

Key words:

Cracking, Surfacing, Steel Sheet, Wear Resistant


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