Method for carrying out enhancement processing on intensity and toughness of light alloy material

A technology of strengthening treatment and light alloy, which is applied in the field of strengthening treatment of light alloy materials, which can solve the problems of limited strength and toughness of light alloys and difficulty in preparing light alloy materials.

Inactive Publication Date: 2014-01-15
CHANGZHOU RUNYUAN WARP KNITTING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned methods can improve the strength and toughness of light alloy materials, but the ability to improve the strength and toughness of light alloys by the above-mentioned methods is very limited, and it is difficult to prepare light ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 6061 aluminum alloy rods are used as samples for strengthening treatment. The weight percentages of the aluminum alloy components are Mg: 0.8-1.2%, Si: 0.4-0.8%, Cu: 0.15-0.4%, Cr: 0.15-0.35% , Mn: 0.15%, Fe: 0.7%, Zn: 0.25%, Ti: 0.15%, and the balance is Al.

[0032] Solution treatment; the aluminum alloy bar is placed in a heat treatment furnace at 450 o C at a temperature of 3 h.

[0033] Quenching treatment; put the aluminum alloy bar after solid solution treatment into 15 o C in water and then cooled to room temperature.

[0034] Aging treatment; place the quenched aluminum alloy bar in a heat treatment furnace, and heat it at 100 o C at a temperature of 30h, and then the aluminum alloy bar is naturally cooled to room temperature.

[0035] Cryogenic treatment and ultrasonic field impact treatment; place the aluminum alloy rod after aging treatment in a cryogenic box, start from room temperature, and cool down at a rate of 10 o C / min, cooling the aluminum alloy...

Embodiment 2

[0039] The 7055 aluminum alloy bar is used as the sample for strengthening treatment. The weight percentage of each component of the aluminum alloy is Zn: 8%, Mg: 2.2%, Cu: 2.2%, Zr: 0.2%, Mn≤0.05%, Fe≤ 0.1%, Si≤0.15%, Ti≤0.06%, Cr≤0.04%, and the balance is Al.

[0040] Solution treatment; the aluminum alloy bar is placed in a heat treatment furnace at 475 o C for 2 h at a temperature.

[0041] Quenching treatment; put the aluminum alloy bar after solid solution treatment into 20 o C in water and then cooled to room temperature.

[0042] Aging treatment; the quenched aluminum alloy bar is placed in a heat treatment furnace at 120 o C temperature for 24h, then the aluminum alloy rods were naturally cooled to room temperature.

[0043] Cryogenic treatment and ultrasonic field impact treatment; place the aged-treated aluminum alloy rod in a cryogenic box, start from room temperature, and cool at a rate of 1 o C / min, cooling the aluminum alloy bar to -196 o C for 24 hours ...

Embodiment 3

[0047] 6 high-silicon (Si) aluminum alloy rods were used as samples for strengthening treatment. The weight percentages of the components of the aluminum alloy were Si: 20%, Fe: 2.0%, Sr: 0.12%, and the balance was Al.

[0048] Solution treatment; the aluminum alloy bar is placed in a heat treatment furnace at 540 o C for 4 h at a temperature.

[0049] Quenching treatment; put the aluminum alloy bar after solid solution treatment into 22 o C in water and then cooled to room temperature.

[0050] Aging treatment; the quenched aluminum alloy bar is placed in a heat treatment furnace at 150 o C temperature for 12h, then the aluminum alloy rods were naturally cooled to room temperature.

[0051] Cryogenic treatment and ultrasonic field impact treatment; place the aged-treated aluminum alloy rod in a cryogenic box, start from room temperature, and cool at a rate of 5 o C / min, cooling the aluminum alloy bar to -196 o Insulation at ultra-low temperature of C for 12 hours, when...

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Abstract

The invention discloses a method for carrying out enhancement processing on intensity and toughness of a light alloy material. The method comprises solution treatment and aging treatment which are carried out on the light alloy material. The method further comprises subzero treatment carried out after aging treatment and ultrasonic field impact treatment in the subzero treatment process. The subzero treatment process comprises the steps of cooling light alloy to minus 196 DEG C from the room temperature at a cooling speed of 1 to 10 DEG C per minute and carrying out heat preservation for 12 to 30 h. The ultrasonic field impact treatment is preferably carried out in the later period of the subzero treatment and has ultrasonic field intensity of 1 to 50 Kw/m<2>, sound field frequency of 10 to 40 KHZ and ultrasonic field processing time of 60 to 200 S. The light alloy subjected to subzero treatment and ultrasonic field impact treatment is placed into an oven with a temperature of 110 to 170 DEG C, is subjected to heat preservation for 2 to 6 h, then is placed in the air and is naturally recovered to the room temperature. The method can enable the light alloy material to have compact tissues and small residual stress and enable intensity and toughness of the light alloy material to be synchronously and greatly improved.

Description

technical field [0001] The invention relates to a strengthening treatment method of a light alloy material, in particular to a strengthening treatment method of the strength and toughness of a light alloy material. Background technique [0002] Lightweight, high-strength and tough light alloy materials are widely used in machinery manufacturing fields such as aviation, aerospace, high-passenger and military industries. The preparation of light-weight, high-strength and tough light alloy materials is the goal of material workers, but from the perspective of strengthening mechanism , There is a contradiction between the strength and toughness of materials. Therefore, it is urgent to study a new material preparation and processing method to make metal materials have both high strength and high toughness. [0003] From the perspective of existing technologies, traditional heat treatment or equal channel angular extrusion (ECAP) is usually used to refine the grain of light alloy ...

Claims

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Application Information

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IPC IPC(8): C22F1/047C22F3/02
Inventor 王占洪张勋寅朱晓宏
Owner CHANGZHOU RUNYUAN WARP KNITTING MACHINERY
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