A kind of high temperature resistant aluminum matrix composite material and its preparation method and application

An aluminum-based composite material and composite material technology, applied in the field of high-temperature-resistant aluminum-based composite materials and their preparation, can solve problems such as softening of ordinary aluminum alloys, achieve low production costs, high-temperature wear resistance and yield strength, and no brakes noise effect

Active Publication Date: 2022-06-03
沈阳鑫作粉末冶金制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the downhill continuous braking situation, the surface temperature of the brake disc may reach 300-400°C, and ordinary aluminum alloys will soften at this temperature

Method used

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  • A kind of high temperature resistant aluminum matrix composite material and its preparation method and application
  • A kind of high temperature resistant aluminum matrix composite material and its preparation method and application
  • A kind of high temperature resistant aluminum matrix composite material and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0027] 1. A preparation method of a high temperature resistant aluminum matrix composite material.

[0028] A high temperature resistant aluminum matrix composite material is composed of the following components in mass fractions: 10% iron, 8% silicon, 1.5% nickel, and 80.5% aluminum. The preparation method of the high temperature resistant aluminum matrix composite material includes the following steps.

[0029] Step 1. Preparation of pre-alloyed raw materials by spraying method: adding iron, silicon and nickel to the aluminum melt, melting at high temperature, and spraying it into powder by gas atomization.

[0030] Step 2. Mechanical alloying: The pre-alloyed raw material obtained in Step 1 is ball-milled in a mixer for more than 72 hours.

[0031] Step 3. The powder obtained in step 2 is vacuum-hot pressed in a steel mold, and then sintered. The vacuum degree is -0.1MPa, and the pressure is 250kg / cm at 0-560℃ 2 , the pressure is 350kg / cm at 560-625℃ 2 . The sintering t...

Embodiment 2

[0039] A high temperature resistant aluminum matrix composite material is composed of the following components in mass fractions: 9% iron, 7% silicon, 1.7% nickel, and 82.3% aluminum. The preparation method of the high temperature resistant aluminum matrix composite material includes the following steps.

[0040] Step 1. Preparation of pre-alloyed raw materials by spraying method: adding iron (or iron alloy) to the aluminum melt, melting at high temperature, and spraying it into powder by gas atomization.

[0041] Step 2. Mechanical alloying: The pre-alloyed raw material obtained in Step 1 is ball-milled in a mixer for more than 72 hours.

[0042] Step 3. The powder obtained in step 2 is vacuum-hot pressed in a steel mold, and then sintered. The vacuum degree is -0.1MPa, and the pressure is 250kg / cm at 0-560℃ 2 , the pressure is 350kg / cm at 560-625℃ 2 . The sintering temperature is 660-750° C., and the sintering time is 40-60 min (constant temperature and pressure).

[0043]...

Embodiment 3

[0045] A high temperature resistant aluminum matrix composite material is composed of the following components in mass fractions: 11% iron, 9% silicon, 1.8% nickel, and 78.2% aluminum. The preparation method of the high temperature resistant aluminum matrix composite material includes the following steps.

[0046] Step 1. Preparation of pre-alloyed raw materials by spraying method: adding iron, silicon and nickel to the aluminum melt, melting at high temperature, and spraying it into powder by gas atomization.

[0047] Step 2. Mechanical alloying: The pre-alloyed raw material obtained in Step 1 is ball-milled in a mixer for more than 72 hours.

[0048] Step 3. The powder obtained in step 2 is vacuum-hot pressed in a steel mold, and then sintered. The vacuum degree is -0.1MPa, and the pressure is 250kg / cm at 0-560℃ 2 , the pressure is 350kg / cm at 560-625℃ 2 . The sintering temperature is 660-750° C., and the sintering time is 40-60 min (constant temperature and pressure).

...

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Abstract

The invention belongs to the technical field of aluminum alloy materials, and in particular relates to a high-temperature-resistant aluminum-based composite material and its preparation method and application. A high-temperature-resistant aluminum-based composite material, which is composed of the following components by mass fraction: iron 8%-12%, silicon 6%-10%, nickel 1%-2%, and the balance is aluminum. The high-temperature resistant aluminum-based The preparation method of the composite material comprises the following steps: step 1, preparing pre-alloyed raw materials by spraying method; step 2, mechanical alloying; step 3, vacuum hot pressing the powder obtained in step 2 in a steel mold, and then sintering; step 4. After demoulding, machine processing is finished. The high-temperature-resistant aluminum-based composite material provided by the invention is suitable for manufacturing automobile aluminum alloy brake discs. Compared with the existing automobile brake disc materials, the aluminum-based composite material prepared by the invention has a simple process and does not require surface micro-arc oxidation treatment. The production cost is low, and the high temperature wear resistance and yield strength can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy materials, and in particular relates to a high temperature resistant aluminum matrix composite material and a preparation method and application thereof. Background technique [0002] China is the world's largest automobile producer and consumer. In 2017, China's passenger car production was 24.81 million per year, a growth rate of 3%; at the same time, China's passenger car ownership exceeded 180 million. By 2020, the average fuel consumption of passenger cars produced will drop to 5.0 liters / 100 kilometers, and the fuel consumption of energy-saving passenger cars will drop to below 4.5 liters / 100 kilometers; the production capacity of pure electric vehicles and plug-in hybrid electric vehicles It has reached 2 million vehicles, and the cumulative production and sales volume has exceeded 5 million vehicles. General passenger car brake pads wear 3mm / 8-120,000 km, brake pads are 20mm / 8-120,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C21/02C22C1/04F16D65/12
CPCC22C21/00C22C21/02C22C1/0416F16D65/128F16D2200/003F16D2200/0086B22F2998/10B22F9/082B22F2009/041B22F3/14
Inventor 林文言
Owner 沈阳鑫作粉末冶金制品有限公司
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