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Wear-resistant material, locally reinforced light metal matrix composite material and preparation method

A technology of wear-resistant materials and composite materials, which is applied in the field of light metal matrix composites and light metal matrix composites, and can solve the problems of dimensional accuracy of castings, poor surface finish, difficult control of internal shrinkage pores, difficulty in disassembly and maintenance of parts, etc. problems, to achieve the effect of improving passing performance, improving vehicle safety, and high toughness

Active Publication Date: 2019-09-03
NINGBO HIGHRISE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cast iron brake hubs and brake discs have the following disadvantages; 1. The density of cast iron is high, with a density of 7.3g / cm 2 Therefore, the weight of the brake hub and brake disc is relatively heavy, and the weight of the brake hub and brake disc belongs to the unsprung weight, which is equivalent to 3 to 5 times the sprung weight, which will undoubtedly significantly increase the fuel consumption of the vehicle and reduce the Vehicle maneuverability. In addition, it is difficult to disassemble and maintain related components; 2. The thermal conductivity of cast iron is poor, and the heat generated by friction during braking is slow to dissipate, which may easily cause the brake system to fail due to excessive temperature rise.
3. Cast iron brake hubs and brake discs are generally cast with sand castings. The dimensional accuracy and surface finish of the castings are poor, and the internal shrinkage pores are not easy to control. The labor intensity of casting production is high and the environmental pollution is relatively large.

Method used

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  • Wear-resistant material, locally reinforced light metal matrix composite material and preparation method
  • Wear-resistant material, locally reinforced light metal matrix composite material and preparation method

Examples

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Embodiment 1

[0025] Embodiment 1: prepare the aluminum alloy automobile brake disk with wear-resistant layer, this automobile brake disk is made by the casting aluminum alloy of American brand A356, and its size is Φ288mm (outer diameter) * 44.6mm (thickness), its resistance The grinding layer is a circular ring with a size of Φ288mm (outer diameter)×184mm (inner diameter)×3mm (thickness). The preparation method comprises the following steps:

[0026] (1) Copper foam with a porosity of 10-60ppi and a thickness of 10mm is machined into Φ288mm (outer diameter) × 184mm (inner diameter) × 10mm (thickness) to obtain a high-temperature-resistant metal skeleton, and the high-temperature-resistant metal skeleton is placed in the preform mold;

[0027] (2) In terms of mass fraction, 10% alumina fiber, 5% aluminum silicate fiber, 40% fly ash particles, 8% silicon carbide particles and 3% carboxymethyl cellulose aqueous solution (concentration 20%) and 12% silica gel solution (concentration is 50%)...

Embodiment 2

[0030] Embodiment 2: prepare the magnesium alloy truck brake hub with wear-resistant layer, this automobile brake hub is made by the casting magnesium alloy of American designation AZ91D, and its size is Φ480mm (outer diameter) * 227mm (height), and its wear-resistant The size of the layer is Φ420mm (outer diameter)×180mm (height)×7mm (tube wall thickness). The preparation method comprises the following steps:

[0031] (1) According to the mass fraction, 40% of the high-strength steel fibers with a diameter of 0.4 to 1mm are carded and woven, laid flat in the cylindrical prefabricated mold and compacted to make a high-temperature resistant metal skeleton and juxtapose In the position near the inner wall of the preform mold, 12% aluminum silicate fibers, 41% silicon carbide particles and 5% carboxymethyl cellulose aqueous solution (concentration is 20%) and 10% silicon melt solution (concentration is 60%) and proper amount of water are uniformly mixed to make a ceramic slurry,...

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Abstract

The composition of the wear-resistant material of the present invention includes a high-temperature-resistant metal skeleton material, a ceramic fiber material and a ceramic particle material with a mass ratio of (10-60): (1-30): (10-70), and the high-temperature-resistant metal skeleton material is foam Metal or high-temperature-resistant metal fibers. This wear-resistant material has good wear resistance and high toughness. It is suitable for occasions that require high wear resistance and toughness. It can be partially compounded on the surface of the light metal alloy matrix to increase the high temperature of the light metal alloy matrix. wear resistance and high toughness; the invention partially strengthens the light metal matrix composite material, and the light metal alloy matrix that is locally strengthened by the wear-resistant material can be made into a brake hub or brake hub with light weight, good wear resistance and good thermal conductivity. The moving plate improves the safety of the vehicle; the preparation method of the locally reinforced light metal matrix composite material of the present invention combines the wear-resistant layer with the light metal alloy matrix metallurgically through the squeeze casting process to ensure that the wear resistance and comprehensive mechanical properties of the composite material meet the requirements of use .

Description

technical field [0001] The invention relates to the technical field of wear-resistant materials and locally reinforced metal-based composite materials, in particular to a wear-resistant material, a light metal-based composite material locally reinforced by the wear-resistant material, and a preparation method of the light metal-based composite material. Background technique [0002] Wear-resistant materials are an important basic material in industrial production and are closely related to modern production and life. The most common wear-resistant mechanisms in daily life are automobile brake hubs and brake discs. Brake hubs and brake discs are the key safety parts of automobiles, which act as friction brakes and require good wear resistance and comprehensive mechanical properties. In the process of driving, it is very important whether the brake hub or brake disc can brake safely and reliably. If the brake fails in an emergency, it will cause a safety accident, or even cau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D18/02B22D19/02C04B33/135C04B35/80B22F1/062
CPCC04B33/1352C04B35/80B22D18/02B22D19/02C04B2235/5232C04B2235/5224C04B2235/3826B22F1/062Y02P40/60B22C9/02C04B35/76C04B2235/5228C04B2235/5236C04B2235/5244C04B2235/5248C04B33/36C04B33/138C04B35/565C04B35/14C04B35/583C04B35/481C04B35/10C04B35/48C04B35/12C04B2235/526C04B2235/5264C04B2235/616C04B2235/602C22C1/08B22F2999/00B22F7/08B22F7/006B22F7/062C22C47/14B22F2998/10C22C49/10C22C49/14F16D69/028C22C1/0425C22C1/0416C22C1/0433C04B2235/405C04B2235/407C22C49/00C22C49/02C22C49/04
Inventor 齐霖齐丕骧
Owner NINGBO HIGHRISE NEW MATERIAL CO LTD
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