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Thermal treatment process for alloy automobile hub casting

A technology for automobile wheel hubs and castings, applied in the field of heat treatment, can solve the problems of poor heat dissipation performance, large steel wheel mass, and large inertial resistance, and achieve the effects of improving surface and internal quality, improving mechanical properties, and eliminating casting stress.

Inactive Publication Date: 2016-03-09
CHANGSHU HONGQIAO CAST STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A car wheel is a cylindrical metal part in a car tire that is centered on the shaft to support the tire. The car wheel is an important part of auto parts. The wheels on the market can be divided into steel wheels and alloy wheels according to their materials. Steel wheels Large mass, large inertial resistance, poor heat dissipation, and very easy to rust. Alloy wheels have better performance than steel wheels. Alloy wheels are generally made by casting process, but the surface and internal quality of castings are poor. In order to improve the quality of aluminum alloy automobile wheels The surface and internal quality of castings, as well as improving their mechanical properties, require heat treatment of castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A heat treatment process for alloy automobile wheel hub castings. The alloy automobile wheel hub castings are formed by pouring aluminum-magnesium alloy liquid. The components of the aluminum-magnesium alloy liquid and the mass ratio of each component are: 2% magnesium, 2% silicon %, iron 0.8%, nickel 1.2%, chromium 0.5%, copper 0.5%, titanium 1.5%, zinc 0.4%, aluminum 91.1%;

[0015] The heat treatment of the alloy automobile wheel hub casting includes normalizing pretreatment and quenching and tempering treatment, which includes the following steps:

[0016] a. Put the alloy automobile wheel hub casting into the heating furnace, raise the temperature to 630°C, and keep it warm for 1.5 hours; continue to heat up to 730°C, keep it warm for 3 hours, and cool it to below 300°C with the furnace;

[0017] b. Then, do quenching and tempering treatment on the alloy automobile wheel casting after being released from the furnace, put it into the heating furnace again, raise the...

Embodiment 2

[0021] A heat treatment process for alloy automobile wheel castings. The alloy automobile wheel castings are formed by pouring aluminum-magnesium alloy liquid. The components of the aluminum-magnesium alloy liquid and the mass ratio of each component are: magnesium 4%, silicon 2.5% %, iron 0.6%, nickel 1%, chromium 0.3%, copper 0.3%, titanium 1%, zinc 0.2%, aluminum 90.1%;

[0022] The heat treatment of the alloy automobile wheel hub casting includes normalizing pretreatment and quenching and tempering treatment, which includes the following steps:

[0023] a. Put the alloy automobile wheel hub casting into the heating furnace, raise the temperature to 650°C, keep it warm for 1 hour; continue to raise the temperature to 750°C, keep it warm for 2 hours, and cool it to below 300°C with the furnace;

[0024] b. Then, do quenching and tempering treatment on the alloy automobile wheel casting after being released from the furnace, put it into the heating furnace again, raise the te...

Embodiment 3

[0028] A heat treatment process for alloy automobile wheel castings. The alloy automobile wheel castings are formed by pouring aluminum-magnesium alloy liquid. The components of the aluminum-magnesium alloy liquid and the mass ratio of each component are: magnesium 6%, silicon 0.5% %, iron 0.5%, nickel 0.8%, chromium 0.2%, copper 0.1%, titanium 0.9%, zinc 0.1%, aluminum 90.9%;

[0029] The heat treatment of the alloy automobile wheel hub casting includes normalizing pretreatment and quenching and tempering treatment, which includes the following steps:

[0030] a. Put the alloy automobile wheel hub casting into the heating furnace, raise the temperature to 670°C, keep it warm for 1 hour; continue to raise the temperature to 770°C, keep it warm for 2 hours, and cool it to below 300°C with the furnace;

[0031] b. Then, quench and temper the alloy automobile wheel casting after being released from the furnace, put it into the heating furnace again, raise the temperature to 820°C...

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Abstract

The invention discloses a thermal treatment process for an alloy automobile hub casting which is cast by adopting an aluminum-magnesium alloy liquid, wherein the aluminum-magnesium alloy liquid is prepared from the following components in proportion by mass: 2%-6% of magnesium, 0.5%-2.5% of silicon, 0.5%-0.8% of iron, 0.8%-1.2% of nickel, 0.2%-0.5% of chromium, 0.1%-0.5% of copper, 0.9%-1.5% of titanium, 0.1%-0.4% of zinc and the balance of aluminum. Thermal treatment for the alloy automobile hub casting comprises normalizing pretreatment and tempering treatment. In this way, the process is simple and easy to control; the automobile hub casting is cast by an aluminum-magnesium alloy with a reasonable formula; the casting is subjected to the normalizing pretreatment and the tempering treatment, so that casting stress is eliminated, thereby improving surface and inherent quality of the casting, and improving mechanical performance of the casting.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a heat treatment process for alloy automobile wheel hub castings. Background technique [0002] A car wheel is a cylindrical metal part in a car tire that is centered on the shaft to support the tire. The car wheel is an important part of auto parts. The wheels on the market can be divided into steel wheels and alloy wheels according to their materials. Steel wheels Large mass, large inertial resistance, poor heat dissipation, and very easy to rust. Alloy wheels have better performance than steel wheels. Alloy wheels are generally made by casting process, but the surface and internal quality of castings are poor. In order to improve the quality of aluminum alloy automobile wheels The surface and internal quality of castings, as well as improving their mechanical properties, require heat treatment of castings. Contents of the invention [0003] The technical problem main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C21/02C22F1/047C22F1/043C22F1/05
CPCC22C21/08C22C21/02C22F1/043C22F1/047C22F1/05
Inventor 陈学忠
Owner CHANGSHU HONGQIAO CAST STEEL CO LTD
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