High effective heat treatment method for wheel hub founded at low pressure from high performance A356 alloy

A technology of low-pressure casting wheel hub and heat treatment method, applied in the field of metal heat treatment, can solve the problems of insufficient wheel hub strength requirements, low wheel hub yield strength, long production time, etc. Effect

Inactive Publication Date: 2007-10-10
ZHENGZHOU UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the heat treatment method of A356 alloy low-pressure cast aluminum alloy is to carry out solution treatment at high temperature, then quench and carry out artificial aging, which not only takes a long time to produce, but also has a low yield strength of the wheel hub, which is far from the strength of the wheel hub of high-end cars. Require

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The heat treatment method of the high-efficiency and high-performance A356 alloy low-pressure casting wheel hub in this embodiment is: solid solution at a temperature of 535°C for 5 hours, quenching at room temperature, low-temperature pre-aging immediately after quenching, and test at a temperature of 100°C. The samples were kept warm in batches, and the holding time was: 1 hour, and aging treatment was carried out immediately after the holding, the aging temperature was 175°C, and the aging time was 5 hours.

Embodiment 2

[0020] The heat treatment method of the high-efficiency and high-performance A356 alloy low-pressure casting wheel hub in this embodiment is: solid solution at a temperature of 540°C for 6 hours, quenching at room temperature, low-temperature pre-aging immediately after quenching, and test at a temperature of 115°C. The samples were kept warm in batches, and the holding time was 2 hours. After the heat preservation, the aging treatment was carried out immediately, the aging temperature was 180°C, and the aging time was 4 hours.

Embodiment 3

[0022] The heat treatment method of the high-efficiency and high-performance A356 alloy low-pressure casting wheel hub in this embodiment is: solid solution at a temperature of 545°C for 7 hours, quenching at room temperature, low-temperature pre-aging immediately after quenching, and sample at a temperature of 135°C Carry out heat preservation in batches, the heat preservation time is: 3 hours, carry out aging treatment immediately after heat preservation, the aging temperature is 185 ℃, and the aging time is 3 hours.

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PUM

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Abstract

This invention relates to a method for thermal treatment of high-efficiency and high-performance low-pressure die casting A356 alloy wheel. The method comprises: performing solid solution treatment at 535-545 deg.C for 5-7 h, quenching, performing low-temperature pre-aging treatment, and then performing aging treatment at 175-185 deg.C for 3-5 h immediately. The method has such advantages as shortened solid solution treatment time, shortened aging treatment time, high strength of low-pressure die casting A356 alloy wheel, shortened thermal treatment period, increased production efficiency, and improved mechanical properties of low-pressure die casting A356 alloy wheel.

Description

technical field [0001] The invention relates to a heat treatment method suitable for an A356 alloy low-pressure casting wheel hub, belonging to the field of metal heat treatment. Background technique [0002] With China's accession to the WTO, China will be the world's largest and fastest-growing auto market in the next 5-10 years. Energy, environment and safety are the three major issues of great concern to all countries in the world today. The development and application of the auto industry Accessibility is closely related to these three issues. With the increasing requirements of modern automobiles for energy saving and consumption reduction, safety and environmental protection regulations are becoming increasingly strict, and the requirements for lightweight automobiles are more urgent. Aluminum alloys are light in weight, high in strength, good in formability, moderate in price, and high in recovery rate. The advantages are of great significance to reduce the weight o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
Inventor 关绍康陈旷胡保健梁允勇
Owner ZHENGZHOU UNIV
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