The Purchase Of Surfacing Wear-Resistant Plate Need To Pay Attention To Several Points

size

The first look at the size of the whole board is composite specifications, the general product board will clearly and accurately mark the whole board number, the whole board size and welding specifications. Second, see whether the weld size is uniform, the weld width is uneven, and the error of more than 5mm is generally unqualified products, except for the last weld of the welding gun. In addition, welding specifications must meet the requirements, otherwise it is unqualified products.

Thickness and flatness

Different specifications of surfacing wear-resistant plate have different thickness standards, measure the middle of the weld, measure the average value of the five values. The average thickness tolerance of 0 to 0.7mm is perfect, and the thickness tolerance of >1mm is generally unqualified products.

Surface forming

There are more details to pay attention to in surface molding, the first observation is whether there is a pit (diameter greater than 4mm, depth greater than 2mm of the indentation is defined as the pit), whether the pit is repaired generally repair marks a single pit repair area is best in 20mm*20mm. The second is to look at the surface of the weld, pay attention to whether there are pores (holes in the wear-resistant layer that are not filled with molten metal due to bad gas leakage). The welding pass molding is not good (caused by low current or welding wire), broken arc and other problems. The third is to observe the combination of substrate and wear-resistant layer. A large area of wear-resistant plate falls off, a large area of pores at the joint of the wear-resistant layer and the substrate, causing cracks in the substrate after welding, welding leakage and other problems are generally unqualified products.

Hardness and chemical composition

Through the naked eye observation and calipers and other tools we can roughly judge the good and bad wear plate. Hardness and chemical composition need professional instruments to detect. The chemical composition of surfacing wear-resistant plates varies according to different uses and specifications, as well as the research and development capabilities and production processes of each company. The hardness of conventional wear plate (HRC) shall not be less than 55.