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Composite new material brake drum

A new material and brake drum technology, applied in the direction of brake drums, manufacturing tools, friction linings, etc., can solve the problems of easy cracks in the braking surface materials, reduce the tendency of thermal failure, improve braking efficiency, and improve The effect of binding strength

Active Publication Date: 2022-04-08
山西汤荣机械制造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the braking surface material is prone to cracking

Method used

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  • Composite new material brake drum
  • Composite new material brake drum
  • Composite new material brake drum

Examples

Experimental program
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Effect test

preparation example Construction

[0049] The present invention provides a method for preparing the graded wear-resistant gray iron material described above, comprising the steps of continuously cast iron water to obtain a gradient wear-resistant gray iron material. In the present invention, the continuous casting is preferably a centrifugal casting process; the present invention is not particularly limited for the conditions of the centrifugal casting process, and it is possible to prepare a gradient wear-resistant gray iron material. In the present invention, the continuous casting includes a first stage casting, a second stage casting, a third stage casting, and a fourth stage cast, the first stage cast iron chemical composition and the bonding layer The chemical composition is the same; the iron hydrophilic composition of the second stage cast is the same as the chemical composition of the proximal bonding layer; the iron hydrothermal chemical composition of the third stage cast is the same as the chemical comp...

Embodiment 1

[0071] The centrifugal casting process is used, and the iron water is continuously cast, and the gradient wear-resistant gray iron material is obtained; the continuous casting includes the first stage casting, the second stage casting, the third stage castings and the fourth stage casting; the casting process is continuous during the casting process Pouring iron water is added to graphite, silicon, manganese, chromium and sulfur, enabling the first phase of casting, second stage casting, third stage casting, and chemical composition of iron water in the fourth stage casting, the bonding layer in Table 1, respectively. The chemical composition of the bonding layer, the central layer, and the brake surface layer is the same; the thickness of the outer high strength steel, the bonding layer, the near-bonding layer, the center layer, and the brake surface layer are 1 to 3 mm, 0.3 to 2 mm, 0.7 to 3 mm, respectively. And 1 ~ 5mm.

[0072] Table 1 Chemical composition of each layer of gr...

Embodiment 2

[0075] The high-strength steel plate is rotated to obtain flange;

[0076] With a centrifugal casting process, high-strength steel water is poured. When the temperature of the high-strength steel is reduced to the iron water solid phase line temperature (0 / -150 ° C), the iron water is continuously poured, resulting in a composite new material brake surface; the continuous casting includes The first stage casting, the second stage casting, the third stage castings and the fourth stage casting; the pouring process is added to the continuous cast iron water, such as the first stage cast, second The chemical composition of iron water during stage casting, third stage casting and fourth stage casting is the same as the bonding layer, the near-bonding layer, the central layer, and the brake surface layer in Table 1, and the outer high strength steel, bonding layer The thickness of the bonding layer, the central layer, and the brake surface layer is 6 to 20 mm, 1 to 3 mm, 0.3 to 2 mm, ...

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Abstract

The invention provides a new composite material brake drum and relates to the technical field of brake drums. The inner layer of the braking surface in the composite new material brake drum provided by the invention is a gradual wear-resistant gray iron material, which includes a bonding layer, a near bonding layer, a central layer and a braking surface layer stacked in sequence ; The content of C in the bonding layer, the near bonding layer, the central layer and the braking surface layer increases sequentially. In the gradual wear-resistant gray iron material provided by the present invention, the content of C, Si, Mn, Cr and S is in a gradual transition from the bonding layer to the braking surface layer, and the gradual wear-resistant gray iron material is in the process of heating and cooling The expansion and contraction rate can be gradually changed with the outer steel of the brake drum, which ensures the uniformity of the temperature field of the brake surface material of the brake drum during the temperature change process, improves the thermal fatigue resistance of the material, and delays braking. The occurrence of cracks on the surface can meet the requirements for the friction performance of the braking surface at the same time.

Description

Technical field [0001] The present invention relates to the field of braking drum technology, and more particularly to a gradient wear-resistant gray iron material and a preparation method thereof, a composite new material brake drum and a preparation method thereof. Background technique [0002] The brake drum is a part of the drum brake system. When the brake is braked, the piston applies a pressure to the two-to-half-month brake shoe, so that it is tightening the drum chamber wall, thereby generating friction to stop the rotation of the wheel. The heavy-duty project dump truck is generally used in the mountains, mining and construction sites, not only the road conditions, but the overload is serious, and is the most harsh model of commercial vehicles. The brake drum of the heavy-duty project dump truck has recently been gray iron, creep iron or bimetallic composite brake drums, and the early failure issues such as cracking or deformation of the brake surface are easily used. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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