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Method for preparing metal matrix composites by pulsed electric field assisted vacuum sheath rolling

A pulsed electric field, composite material technology, applied in the field of iron, magnesium, copper, titanium-based composite materials sintered, graphene or carbon fiber particle reinforcement phase aluminum field, can solve the wetting difficulty, reinforcement phase such as ceramic particles and metal matrix materialization Due to the large difference, the temperature and holding time are difficult to meet the sintering standards, etc., to achieve excellent comprehensive performance, improve sintering efficiency, and reduce deformation stress.

Active Publication Date: 2020-09-18
南京派拉斯曼工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its application in the preparation of metal matrix composites is rarely reported. The main reason is that the reinforcing phase, such as ceramic particles, has a large physical and chemical difference with the metal matrix, and it is difficult to wet. It requires high temperature sintering and continuous heat preservation. The temperature and holding time are difficult to reach the sintering standard

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  • Method for preparing metal matrix composites by pulsed electric field assisted vacuum sheath rolling
  • Method for preparing metal matrix composites by pulsed electric field assisted vacuum sheath rolling

Examples

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Effect test

Embodiment 1

[0047] Preparation of B based on spark plasma sintering and vacuum sheath rolling 4 The method for C particle reinforced aluminum matrix composite material, comprises the steps:

[0048] 1. Prepare the package

[0049] a. Will contain 15vol% B 4 Add aluminum-based powder of C ceramic particles (10~70μm) into a heating furnace filled with inert gas, heat to 500°C, dry and degas at high temperature for 2h, vacuum ball mill at 300rpm for 1h, and roll into 997×60×1.5mm by powder rolling powder green body;

[0050] b. Cut the 2A50 aluminum alloy plate into 1000×63×2mm plates, use 10% sulfuric acid aqueous solution to corrode and clean the surface of the metal plate and the powder to be in contact, and then perform mechanical and sandpaper polishing to completely remove the surface oxide layer and expose the fresh metal on the surface, and Ensure the surface roughness is 40~110μm, then wash with alcohol and acetone solution several times to remove surface oil, after drying, apply...

Embodiment 2

[0059] A method for preparing a carbon nanotube fiber reinforced magnesium-based composite material based on spark plasma sintering and vacuum sheath rolling, comprising the following steps:

[0060] 1. Prepare the package

[0061] a. Add Al powder containing 2wt% carbon nanotubes into a heating furnace filled with inert gas, heat to 500°C, dry and degas at high temperature for 2 hours, vacuum ball mill at 300rpm for 2 hours, and roll the powder into 997×60×1.5mm powder green body;

[0062]b. Cut the 2A50 aluminum alloy plate into 1000×63×2mm plates, use 10% sulfuric acid aqueous solution to corrode and clean the surface of the metal plate and the powder to be in contact, and then perform mechanical and sandpaper polishing to completely remove the surface oxide layer and expose the fresh metal on the surface, and Ensure the surface roughness is 40~110μm, then wash with alcohol and acetone solution several times to remove surface oil, after drying, apply water glass and glass ...

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Abstract

The invention discloses a method with a pulsed electric field assisted adopting vacuum canning rolling to prepare a metal-based composite material. The method comprises the following steps that firstly, composite powder is made into a blank is subjected to heat treatment, then the blank is overlapped with a metal-covered plate subjected to surface treatment, vacuum edge welding is carried out so that internal air can be exhausted, and a vacuum canning test piece structure is formed; and then, the canning test piece is placed into a rolling mill, on the basis of a canning rolling process, a pulse power supply is connected with electric brushes at different positions, a current is applied to the surface of a canning, and green blank plasma sintering and canning electro-plastic rolling are synchronously carried out. The current parameters, the rolling speed and the reduction rate are reasonably controlled, and thus a large-size metal-based composite sheet is obtained through multi-rollerrolling and reasonable sintering time. According to the method, the vacuum canning rolling is coupled with the pulsed electric field, the high-performance reinforced phase-containing metal-based composite sheet can be sintered and rolled in a short time period, wherein the sheet has the characteristics that the macroscopic size is large, the microscopic crystalline grains are fine, the reinforcedphases are uniformly dispersed and distributed; and the method has the characteristics of high efficiency, low consumption, being suitable for large-scale and intensive productions.

Description

technical field [0001] The invention belongs to the technical field of sheath rolling assisted by an external field, and specifically relates to a technique of sheath rolling forming of a metal matrix composite material assisted by pulse current while sintering, in particular to a technique of sheath rolling based on pulse current assistance. A method of sheathing and rolling molding of aluminum, magnesium, copper, iron, and titanium-based composite materials produced by rolling and sintering ceramics, graphene, or carbon fiber particle-reinforced phases. Background technique [0002] The rapid development of high-end equipment and manufacturing industry is inseparable from the support of high-performance materials, especially for high parameters such as light weight, strong wear, high strength and toughness, corrosion resistance, high temperature resistance, and functional / structural integration. requirements. Metal matrix composites are heterogeneous composite materials c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10C22C47/14
CPCC22C1/05C22C47/14
Inventor 张鹏焦少妮王文先寇子明高贵军
Owner 南京派拉斯曼工程技术有限公司
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