shot blasting machine, the better the wear resistance? Do you think so?

shot blasting machine (shot blasting machine) , casting equipment that uses high-speed shots thrown by shot blasting machine to clean or strengthen the surface of castings. The shot blasting machine can simultaneously carry out sand drop, core removal and cleaning of castings.

steel shot is a kind of commonly used metal workpiece processing material in shot blasting cleaning. The steel shot has tight organization and uniform particle size. Treating the surface of metal workpiece with steel shot can increase the surface pressure of metal workpiece and improve the fatigue resistance of workpiece. The use of steel shot to treat the surface of metal workpieces has the characteristics of fast cleaning speed. The steel shot has appropriate hardness and good elasticity. The internal corner and the workpiece with complex shape can be evenly and quickly cleaned, shortening the surface treatment time and improving work efficiency. It is a good surface treatment material. So, is the higher the hardness of the steel shot, the better the wear resistance? Today, Hanchang small braid with you to understand the relationship between the hardness and wear resistance of steel shot.

The research and production practice of Hanchang show that the hardness of steel shot composition is equivalent and the wear resistance is very different, which is related to the matrix tissue.

1. When the hardness of the steel shot is similar, the wear resistance of the heat-treated steel shot is higher than that of the steel shot without heat treatment.

2. When the steel shot with different composition content reaches similar hardness after heat treatment, its wear resistance is different.

3. The relationship line between hardness and wear resistance of steel shot is expressed by coordinates. For heat-treated steel shot, if the relationship line is extrapolated to intersect the ordinate. This indicates that the hardness and wear resistance of the heat-treated steel shot cannot be expressed in a simple proportional relationship.

Therefore, the adhesive wear test of the steel shot on the medium carbon drill nickel molybdenum steel under different microstructure states found that there is no linear relationship between hardness and wear resistance.

results show that it is not always appropriate for steel shot to judge wear resistance only from hardness.

the surface hardness of the steel shot after wear, it is found that there is a good linear relationship between wear and surface hardness, such as in different heat treatment conditions, two straight lines can explain the relationship between product hardness and wear resistance better than one.

In the state of quenched martensite and low temperature tempered martensite, the wear resistance of steel shot is obviously improved with the increase of hardness. After annealing and tempering above 300°C, the hardness increases with little change in wear resistance.

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