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Process for preparing metal base composite material

A composite material and preparation technology, which is applied in the field of metal matrix composite preparation technology, can solve the problems of reducing the performance of composite materials

Inactive Publication Date: 2008-06-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquid method is to mix the reinforcing material into the aluminum alloy melt. Due to the high temperature, the reinforcing material will be oxidized or ablated, and serious interface reactions will occur at the same time, which reduces the performance of the composite material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Preparation of nano-alumina particle-reinforced aluminum matrix composite sheet. According to the requirements of material properties, different process parameters are selected. The L5-1 aluminum plate is 1000mm long, 200mm wide, and 2mm thick; the thickness of aluminum oxide between the two layers of aluminum plates is 0.01mm, and ethanol is used as a mixing agent to evenly coat the surface of the pretreated aluminum plate, and the aluminum plate is placed for 10 minutes after spot welding. Ethanol is volatilized; the feed speed of cold rolling is 0.4m / min, and the reduction rate is 80%. The annealing temperature is 250°C and the temperature is kept for 2h. The prepared alumina particle reinforced aluminum matrix composite plate is a plastic material with uniform structure and composition. After heat treatment, the distribution of oxygen element on one side of the aluminum plate increases significantly, and the yield strength σ 0.2 362Mpa, tensile strength...

Embodiment 2

[0017] Example 2: Preparation of nano-alumina particle-reinforced magnesium-based composite board. Process parameters are selected according to the requirements for material properties. The AZ91 magnesium plate is 500mm long, 200mm wide, and 2mm thick; the thickness of aluminum oxide between the magnesium plates is 0.1mm; the feed rate of cold rolling is 0.2m / min, and the reduction rate is 70%; aging at 150°C for 10h. A slight interfacial reaction occurred between alumina powder and magnesium, and the yield strength σ 0.2 Reach 340Mpa, tensile strength σ b It is 386Mpa, and the room temperature elongation δ is 6%.

Embodiment 3

[0018] Example 3: Preparation of silicon carbide particle-reinforced magnesium-based composite plate. Process parameters are selected according to the requirements for material properties. The AZ91 magnesium plate is 500mm long, 200mm wide, and 2mm thick. After mixing silicon carbide and ethanol, it is evenly coated and pretreated on the surface of the magnesium plate, with a thickness of 0.1mm; 60%; aging at 200°C for 12 hours after rolling. Silicon carbide and magnesium matrix are well combined. After testing, the yield strength of the composite material σ 0.2 Reach 335Mpa, tensile strength σ b It is 394Mpa, and the room temperature elongation δ is 7%.

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Abstract

The preparation process of metal base composite material includes pre-treatment of plate surface and reinforcing material, addition of the reinforcing material sandwich, cold rolling, heat treatment and other steps. The hardness, strength and toughness are ensured via controlling the proper thickness of the sandwich, cold feeding speed, reducing degree, etc.

Description

technical field [0001] The invention belongs to the field of metal-matrix composite material processing, and in particular relates to a preparation process of metal-matrix composite materials. Background technique [0002] The traditional preparation techniques of metal matrix composites include solid-state method, liquid-state method and other methods, and liquid-state method is mostly used. The liquid method is to mix the reinforcing material into the aluminum alloy melt. Due to the high temperature, the reinforcing material will be oxidized or ablated, and serious interface reactions will occur at the same time, which reduces the performance of the composite material. The solid-state method includes powder metallurgy, hot pressing, hot isostatic pressing, hot rolling, hot extrusion, hot drawing and explosive welding technology, etc. The whole process is at a relatively low temperature, and the interface reaction is not serious, but the strength of the composite material c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/04
Inventor 严彪李刚陆伟唐人剑殷俊林
Owner TONGJI UNIV