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A kind of high-strength corrosion-resistant magnesium alloy composite material for automobile wheel hub and preparation method thereof

A technology for composite materials and automobile hubs, applied in the field of magnesium alloys, can solve the problems of low strength and poor corrosion resistance of magnesium alloys, and achieve the effects of improving mechanical properties, improving bonding strength, and enhancing bonding strength

Active Publication Date: 2018-04-13
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low strength and poor corrosion resistance of existing commercial magnesium alloys, the invention provides a high-strength corrosion-resistant magnesium alloy composite material for automobile hubs

Method used

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  • A kind of high-strength corrosion-resistant magnesium alloy composite material for automobile wheel hub and preparation method thereof
  • A kind of high-strength corrosion-resistant magnesium alloy composite material for automobile wheel hub and preparation method thereof
  • A kind of high-strength corrosion-resistant magnesium alloy composite material for automobile wheel hub and preparation method thereof

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preparation example Construction

[0037] A kind of preparation method of the high-strength corrosion-resistant magnesium alloy composite material that is used for automobile hub among the present invention, concrete implementation of this preparation method has the following steps:

[0038] The first step: melting of TaC / Mg-Zn-Al-Y magnesium alloy composite material

[0039] High-purity raw materials Mg (99.95%), Zn (99.9%), Al (99.9%), and Y (99.9%) were ultrasonically cleaned in acetone and absolute ethanol for 15 minutes, dried in cold air, and weighed according to weight percentage. Ratio, the alloy element content is Zn1~5%, Al4~12%, Y6~15%, the rest is Mg, preferably Zn2~4%, Al6~10%, Y8~14%, the rest is Mg, and the raw materials are placed in vacuum In an induction heating furnace, evacuate to 1×10 -4 Pa, heat the alloy melt and keep it warm for 5 minutes, then add 10-30wt.% TaC particles, preferably 15-25wt.%, to the alloy melt, the TaC particle size is between 40 ± 5nm, magnetically stir for 10 minute...

Embodiment 1

[0050] The first step: melting of TaC / Mg-Zn-Al-Y magnesium alloy composite material

[0051] High-purity raw materials Mg (99.95%), Zn (99.9%), Al (99.9%), and Y (99.9%) were ultrasonically cleaned in acetone and absolute ethanol for 15 minutes, dried in cold air, and weighed according to weight percentage. Ratio, the raw materials were placed in a vacuum induction heating furnace, and the vacuum was evacuated to 1×10 -4 Pa, heat the alloy melt and keep it warm for 5 minutes, then add TaC particles into the alloy melt, the size of TaC particles is between 40±5nm, magnetically stir for 10 minutes and then cool to obtain TaC / Mg-Zn-Al-Y magnesium alloy composite Material; the ratio of alloying elements and TaC particles to the total mass of the material is: Zn2%, Al6%, Y8%, TaC particles 15%, and the rest is Mg;

[0052] Step 2: Surface Pretreatment

[0053] Mechanically polish the surface of the TaC / Mg-Zn-Al-Y magnesium alloy composite material prepared in the first step, and ...

Embodiment 2

[0071] The first step: melting of TaC / Mg-Zn-Al-Y magnesium alloy composite material

[0072] High-purity raw materials Mg (99.95%), Zn (99.9%), Al (99.9%), and Y (99.9%) were ultrasonically cleaned in acetone and absolute ethanol for 15 minutes, dried in cold air, and weighed according to weight percentage. Ratio, the raw materials were placed in a vacuum induction heating furnace, and the vacuum was evacuated to 1×10 -4 Pa, heat the alloy melt and keep it warm for 5 minutes, then add TaC particles into the alloy melt, the size of TaC particles is between 40±5nm, magnetically stir for 10 minutes and then cool to obtain TaC / Mg-Zn-Al-Y magnesium alloy composite Material;

[0073] The ratio of alloying elements and TaC particles to the total mass of the material is: Zn3%, Al8%, Y10%, TaC particles 18%, and the rest is Mg;

[0074] Step 2: Surface Pretreatment

[0075] Mechanically polish the surface of the TaC / Mg-Zn-Al-Y magnesium alloy composite material prepared in the first...

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Abstract

The invention discloses a high-strength corrosion-resistant magnesium alloy composite material for an automobile hub, and a preparation method thereof. From composition, the composite material comprises a matrix and a surface coating of the matrix, wherein the matrix is a magnesium alloy, and comprises the following components in percentage by weight: 1-5% of Zn, 4-12% of Al, 6-15% of Y, 10-30% of TaC particles and the balance Mg. The surface coating is a ZrO2 coating formed in a manner of ion implantation deposition. The material achieves the effects of precipitation strengthening and aging hardening through the synergistic effect of the alloy elements Zn, Al and Y as well as the TaC particles, intermetallic compounds Mg-Zn-(Y) and Mg-Al-(Y) in the matrix, and the discrete TaC particles generate pinning for dislocations in a deformation process, so that the mechanical property of the magnesium alloy composite material is improved; and meanwhile, the ZrO2 coating prepared by virtue of the ion implantation deposition has a gradient structure, so that the bonding strength between the coating and the matrix, and the corrosion resistance of the matrix are remarkably improved.

Description

technical field [0001] The invention belongs to the field of magnesium alloys, and in particular relates to a preparation method of a novel high-performance magnesium alloy for automobile lightweighting. Background technique [0002] Under the premise of ensuring the strength and safety performance of the whole vehicle, the lightweight of automobiles should reduce unnecessary weight as much as possible, thereby reducing fuel consumption and improving handling. Using new high-performance magnesium alloys to replace traditional automotive metal materials is the most direct and effective way to achieve lightweight automobiles s method. Automobile hub is an important part of auto parts, which is very important to the handling and safety of the vehicle. Commonly used hub materials include steel and aluminum alloy. In recent years, the research on magnesium alloys in the field of automobile lightweight has been deepened, and the development of new magnesium alloy wheels has becom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C23/02C22C23/00C22C32/00C23C14/48C23C14/08C23C14/58B60B27/00
CPCB60B27/00B60B2360/10C22C23/00C22C23/02C22C23/06C22C32/0052C23C14/083C23C14/48C23C14/5806
Inventor 郑洋臧立彬陈勇
Owner HEBEI UNIV OF TECH
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