Novel composite material brake drum

A new material, brake drum technology, applied in the direction of brake drum, manufacturing tools, laser welding equipment, etc., can solve the problem of cracking of brake surface materials, reduce the tendency of thermal failure, improve the life of internal lubricant, The effect of improving bond strength
CN113481426AActive Publication Date: 2021-10-08山西汤荣机械制造股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
山西汤荣机械制造股份有限公司
Publication Date
2021-10-08

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Abstract

The invention provides a composite new material brake drum, and relates to the technical field of brake drums. An inner layer of a brake surface in the novel composite material brake drum is made of a gradually-changed wear-resistant gray iron material, and the gradually-changed wear-resistant gray iron material comprises a bonding layer, a near-bonding layer, a center layer and a brake surface layer which are stacked in sequence; and the content of C in the bonding layer, the near-bonding layer, the central layer and the braking surface layer is sequentially increased. In the gradually-changed wear-resistant gray iron material provided by the invention, the contents of C, Si, Mn, Cr and S are in gradual transition from the bonding layer to the braking surface layer, and the expansion and shrinkage rate of the gradually-changed wear-resistant gray iron material in the heating and cooling process can be in gradual transition with that of outer layer steel of the brake drum, so that the uniformity of a section temperature field of the brake surface material of the brake drum in the temperature change process is ensured, the thermal fatigue resistance of the material is improved, generation of cracks on the brake surface is delayed, and meanwhile, the requirement on the friction performance of the brake surface is met.
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Description

technical field

[0001] The invention relates to the technical field of brake drums, in particular to a gradual wear-resistant gray iron material and its preparation method and application, a new composite material brake drum and its preparation method. Background technique

[0002] The brake drum is a part of the drum brake system. When braking, the piston exerts pressure on the two pairs of half-moon brake shoes, making them stick to the inner wall of the drum, thereby generating friction to stop the rotation of the wheel. Heavy-duty engineering dump trucks are generally used in mountainous areas, mining areas and construction sites. Not only are the road conditions poor, but they are also seriously overloaded. They are the worst type of commercial vehicles. Whether the brake drums of heavy-duty engineering dump trucks are gray iron, vermicular iron or bimetallic composite brake drums, they are prone to early failure problems such as cracking or deformation of the braking s...

Claims

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