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

Active Publication Date: 2021-10-08
山西汤荣机械制造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the braking surface

Method used

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  • Novel composite material brake drum
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  • Novel composite material brake drum

Examples

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preparation example Construction

[0049] The present invention provides a method for preparing a gradual wear-resistant gray iron material described in the above technical solution, comprising the following steps: continuously pouring molten iron to obtain a gradual wear-resistant gray iron material. In the present invention, the continuous casting preferably adopts a centrifugal casting process; the present invention has no special limitation on the conditions of the centrifugal casting process, as long as the gradual wear-resistant gray iron material can be produced. In the present invention, the continuous pouring includes the first-stage pouring, the second-stage pouring, the third-stage pouring and the fourth-stage pouring in sequence, the chemical composition of the molten iron poured in the first stage and the bonding layer The chemical composition is the same; the chemical composition of the molten iron poured in the second stage is the same as that of the near bonding layer; the chemical composition of...

Embodiment 1

[0071] The centrifugal pouring process is used to continuously pour molten iron to obtain a gradual wear-resistant gray iron material; the continuous pouring includes the first stage pouring, the second stage pouring, the third stage pouring and the fourth stage pouring; Graphite, silicon, manganese, chromium and sulfur are added to the poured molten iron, so that the chemical composition of the molten iron in the first stage pouring, the second stage pouring, the third stage pouring and the fourth stage pouring process is respectively the same as the bonding layer, The chemical composition of the near bonding layer, central layer and braking surface layer is the same; the thickness of outer high strength steel, bonding layer, near bonding layer, central layer and braking surface layer are 1~3mm, 0.3~2mm, 0.7~3mm respectively And 1 ~ 5mm.

[0072] Table 1 Chemical composition of each layer of gradual wear-resistant gray iron material

[0073]

Embodiment 2

[0075] Spin the high-strength steel plate to get the flange;

[0076] The centrifugal casting process is used to cast high-strength molten steel. When the temperature of the high-strength molten steel drops below the solidus temperature of the molten iron (0 / -150°C), the molten iron is continuously poured to obtain a composite new material braking surface; the continuous pouring includes: The first stage of pouring, the second stage of pouring, the third stage of pouring and the fourth stage of pouring; in the pouring process, graphite, silicon, manganese, chromium and sulfur are added to the molten iron poured continuously, so that the first stage of pouring, the second The chemical composition of molten iron in the stage pouring, third stage pouring and fourth stage pouring process is the same as the chemical composition of the binding layer, near bonding layer, center layer and braking surface layer in Table 1; the outer high-strength steel, bonding layer The thicknesses of...

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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.

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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Application Information

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IPC IPC(8): C22C37/10F16D65/10F16D69/02F16D69/04B22D19/08B22D19/16B23K9/173B23K26/21C22C37/06
CPCC22C37/10C22C37/06B22D19/08B22D19/16F16D65/10F16D69/02F16D69/0416B23K9/173B23K26/21F16D2250/0007
Inventor 曹全青靳宏斌王晓妍任亚东郭昊昕
Owner 山西汤荣机械制造股份有限公司
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