The wear-resistant plate has high wear resistance and good impact performance. It can be cut, bent, welded, etc., and can be connected to other structures by welding, plug welding, bolting, etc., which saves time in the maintenance on-site process It is widely used in metallurgy, coal, cement, electricity, glass, mining, building materials, bricks and tiles and other industries. Compared with other materials, it has a high cost performance and has been favored by more and more industries and manufacturers. .

　　Cutting cThe relationship between the hardness of the wear plate and its mechanical properties

　　Because hardness and tensile strength have a certain conversion relationship, and some other mechanical properties are related to tensile strength, hardness and other mechanical properties also have a certain relationship.

Practice has proved that the relationship between Brinell hardness (HB) and tensile strength (σb) is σb≈1/3HB, and the relationship between bending fatigue limit (σ-1) and tensile strength (σb) is σ-3 ≈1/2σb, so there is the following approximate relationship between σ-1 and HB:

　　Σ-1≈1/6HB

　　Carbon steel σ-1=12 HRC+122

　　 high-strength alloy steel σ-1=8.7(1+1.35ψ)HRC (ψ is area reduction)

　　 means that there is a roughly linear law between fatigue limit and static strength.

In some materials, the approximate relationship between the more specific bending fatigue limit and the tensile strength of some materials is also given, for example, for carbon steel, σ-1=0.35σb+12.2; for gray cast iron, σ-1=0.25σb +2; σ-1=(0.25~0.4)σb for aluminum; σ-1=(0.3~0.4)σb for single-phase brass. Combining these relationships or the conversion data of HB and σb given by "Relationship between ferrous metal hardness and tensile strength" and "Relationship between non-ferrous metal hardness and tensile strength", it is not difficult to get the conversion between σ-1 and HB. The data, that is, the bending fatigue limit (σ-1) is derived from the Brinell hardness (HB).

　　From the fatigue limit of bending (σ-1), the relationship between fatigue limit and hardness under other stresses can also be derived, and the conversion has the following formula:

　　 Compressive fatigue resistance σ-1P =0.85σ-1 (steel)

　　Σ-1P =0.65σ-1 (cast steel)

　　 torsional fatigue τ-1 =0.8σ-1 (cast iron)

There is also evidence that for general carbon steel, the fatigue strength when the hardness is HRC 40~45, but on the premise of complete quenching and tempering, this is also the upper limit of the application of the relationship between σ-1 and HRC. . If the hardness increases again, the fatigue limit decreases.

　　 In addition, hardness has a certain relationship with wear resistance or abrasion resistance, machinability, etc. Under normal circumstances, if other conditions are the same, the higher the hardness value, the better the wear resistance (or abrasion resistance), such as measuring tools, cutting tools and grinding balls. The level of hardness can show the quality of machinability. For example, many materials (especially steel materials), when their hardness value is in the range of 179~230 HB, their machinability, too high or too low will make the machinability worse.ack:

　　 Cutting cracks are similar to hydrogen-induced cracks during welding. If the edges of the wear-resistant steel plate are cut, they will appear within 48 hours to several weeks after cutting. Therefore, cutting cracks are delayed cracks. The greater the price and hardness of the wear-resistant steel plate, the larger the cutting cracks will appear.

　　Cutting crack prevention measures:

　　 Preheating cutting: An effective way to prevent the price of wear-resistant steel plate from cutting cracks is to preheat before cutting. Before flame cutting, the price of wear-resistant steel plate is usually preheated. The preheating temperature mainly depends on the price and quality level and thickness of the wear-resistant steel plate. The preheating method can be carried out by flame burner and electronic heating pad. You can use a heating furnace to heat. In order to determine the preheating effect of the wear-resistant steel plate price, the required temperature should be tested at the heating point.