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Step aging heat treatment process for aluminum alloy wheel of vehicle

An aging heat treatment, aluminum alloy technology, applied in the field of auto parts manufacturing, can solve the problems of unconsidered aluminum alloy wheel surface treatment procedures, poor product mechanical properties, high energy consumption and cost, and achieves lower production costs, improve product performance, reduce The effect of energy use

Inactive Publication Date: 2010-10-27
JIANGSU HONGDE SPECIAL PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only has high energy consumption and high cost, but also does not consider the surface treatment procedure of the aluminum alloy wheel after machining, because the strength of the product will increase and the toughness will decrease due to paint spraying and baking during the surface treatment process of the aluminum alloy wheel. The heat treatment process not only consumes high energy and costs, but also has poor mechanical properties of the product

Method used

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  • Step aging heat treatment process for aluminum alloy wheel of vehicle
  • Step aging heat treatment process for aluminum alloy wheel of vehicle
  • Step aging heat treatment process for aluminum alloy wheel of vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 532-1775 aluminum alloy wheels: the heat treatment process is: feeding → solid melting furnace → solid melting treatment: heating up to 540°C, solid melting heating time 40 minutes, solid melting holding time 210 minutes, circulating wind speed 12m 3 More than / second, → out of the solid melting furnace → quenching: quenching transfer time 15 seconds, quenching water temperature 55 ℃, quenching time 3 minutes; → enter the aging furnace → primary aging treatment: heat up to 130 ℃, primary aging heating time 25 minutes, primary aging Holding time for 50 minutes → out of the aging furnace → machining → re-aging treatment, i.e. spray paint baking → powder baking, baking temperature 195 ° C, baking time 30 minutes → primer and varnish baking, baking temperature 175 ℃, baking time: 35 minutes → take out of the oven and air cool.

Embodiment

[0012] 853-1995 aluminum alloy wheels: the heat treatment process is: feeding → solid melting furnace → solid melting treatment: heating up to 545 ° C, heating time 45 minutes, solid melting holding time 240 minutes, circulating wind speed 12m 3 More than / second, → out of the solid melting furnace → quenching: quenching transfer time 20 seconds, quenching water temperature: 65 ℃, quenching time 3.5 minutes; → enter the aging furnace → primary aging treatment: heat up to 135 ℃, primary aging heating time 30 minutes, primary aging Aging holding time is 60 minutes→out of aging furnace→machining→re-aging treatment, i.e. painting and baking→powder baking, baking temperature 200℃, baking time 35 minutes→primer and varnish baking, baking temperature : 180°C, baking time: 35 minutes → out of the oven and air-cooled.

[0013] From the comparison of the mechanical properties of Table 1 and Table 2, it can be seen that the mechanical properties of the A356.2 aluminum alloy wheel proces...

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Abstract

The invention provides a step aging heat treatment process for an aluminum alloy wheel of a vehicle. The process is characterized in that the heat treatment process is divided into three working procedures, namely a solid solution procedure, a primary aging procedure and a secondary aging procedure namely paint spraying baking. The process adopts the technical scheme that the solid solution temperature is 540 DEG C plus or minus 5 DEG C, and the solid solution time ranges from 250 minutes to 290 minutes; the primary aging temperature is 130 DEG C plus or minus 5 DEG C, and the aging time ranges from 60 minutes to 90 minutes; and the paint spraying baking temperature in the secondary aging ranges from 170 DEG C to 200 DEG C, and the paint spraying baking time ranges from 60 minutes to 80 minutes. The method combines the original paint spraying baking process of the aluminum alloy wheel with the heat treatment secondary aging process, without increasing the production cost; by adopting the step of increasing the toughness of the aluminum alloy wheel firstly in the stages of solid solution and primary aging and the step of enhancing the strength of the aluminum alloy wheel in the stage of secondary aging, the invention avoids the defects of the original heat treatment process that the strength and the toughness of the product meet requirements in the procedures of solid solution and primary aging, and the working procedure of paint spraying baking increases the strength of the product and reduces the toughness thereof; and therefore, the invention saves energy, and meanwhile enables the comprehensive mechanical property of the product to be much more excellent.

Description

Technical field: [0001] The invention relates to a staged aging heat treatment process for automobile aluminum alloy wheels, belonging to the field of automobile parts manufacturing Background technique: [0002] Automobile aluminum alloy wheels are important safety components in vehicle driving, requiring high strength, rotational bending performance, excellent impact toughness and good fatigue resistance, so there are high requirements for the properties of the materials produced. At present, A356 aluminum alloy material is the main material for manufacturing aluminum wheels of automobiles. Generally, A356 alloy materials need to be melted, refined and added with elements such as magnesium, strontium, titanium, etc. to be modified and refined, and then heat treated to achieve the strength and toughness of aluminum wheels. Require. At present, my country's aluminum wheel industry has reached a relatively high level in terms of metamorphism and refinement, but the heat trea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04
Inventor 胡因行李萍管建国李光宇崔兰妹
Owner JIANGSU HONGDE SPECIAL PARTS CO LTD