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Treatment method for improving alloy material strength, toughness, and anti-fatigue life

A technology of alloy material and processing method, which is applied in the processing field of improving the strength, toughness and fatigue life of alloy materials, and achieves the effect of high strength, toughness and fatigue resistance life.

Inactive Publication Date: 2014-01-22
CHANGZHOU RUNYUAN WARP KNITTING ENG TECH RES CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The preparation of alloy materials with high strength, high impact toughness and high fatigue life is the pursuit goal of materials scholars, but from the perspective of strengthening mechanism, there is a contradiction between the strength and toughness of alloy materials.

Method used

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  • Treatment method for improving alloy material strength, toughness, and anti-fatigue life
  • Treatment method for improving alloy material strength, toughness, and anti-fatigue life
  • Treatment method for improving alloy material strength, toughness, and anti-fatigue life

Examples

Experimental program
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Effect test

Embodiment 1

[0035] 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.

[0036] Solution treatment; the aluminum alloy bar is placed in a heat treatment furnace at 475 o C for 2 hours, then take the aluminum alloy rod out of the heat treatment furnace and allow it to return to room temperature naturally.

[0037] Aging treatment; place the aluminum alloy bar after solid solution treatment in a heat treatment furnace, at 120 o C at a temperature of 24h, and then the aluminum alloy rod is taken out of the heat treatment furnace and allowed to return to room temperature naturally.

[0038] Cryogenic treatment; place the aging-treated aluminum alloy rods 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 2

[0043] 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.

[0044] Solution treatment; the aluminum alloy bar is placed in a heat treatment furnace at 540 o C at a temperature of 4 h, and then the aluminum alloy rod is taken out of the heat treatment furnace, and allowed to return to room temperature naturally.

[0045] Aging treatment; place the aluminum alloy bar after solid solution treatment in a heat treatment furnace at 150 o C for 12 hours, then take the aluminum alloy rod out of the heat treatment furnace and allow it to return to room temperature naturally.

[0046] Cryogenic treatment; place the aging-treated aluminum alloy rods 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 C for 12 hours at ultra-low temperature, and then the alu...

Embodiment 3

[0051] Use ZK61 magnesium alloy rods as samples for strengthening treatment. The weight percentage of the magnesium alloy components is Al≤0.05%, Zn: 5.0~6.0%, Mn≤0.1%, Zr: 0.3~0.9%, Si≤0.05 %, Fe≤0.05%, Cu≤0.05%, Ni≤0.005%, others: 0.31%, and the balance is Mg.

[0052] Solution treatment; the magnesium alloy bar is placed in a heat treatment furnace at 400 o C at a temperature of 3 h, and then the magnesium alloy rod is taken out from the heat treatment furnace, and allowed to return to room temperature naturally.

[0053] Aging treatment; the magnesium alloy bar after solid solution treatment is placed in a heat treatment furnace, at 100 o C for 12 hours, and then the magnesium alloy rod was taken out of the heat treatment furnace to allow it to return to room temperature naturally.

[0054] Cryogenic treatment: place the aging-treated magnesium alloy rods in a cryogenic box, start from room temperature, and cool at a rate of 1 o C / min, cooling the magnesium alloy bar to...

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Abstract

The invention discloses a treatment method for improving alloy material strength, toughness, and anti-fatigue life. The method comprises solid solution and aging treatments. The method also comprises cryogenic cooling, tempering, and laser impact treatments. The cryogenic cooling treatment comprises the steps that: from room temperature, the alloy is cooled to -196 DEG C with a cooling speed of 1-10 DEG C / min, and the temperature is maintained for 10-40h. According to the tempering treatment, the alloy is heated to 100-150 DEG C, and the temperature is maintained for 2-3h. Laser impact parameters comprise laser impact spot diameter of 1-10mm, pulse energy of 1-10J, laser wavelength of 900-1200nm, repetition rate of 0.1-1HZ, pulse width of 15-40ns, and output laser pulse energy fluctuation no higher than + / -5%. The alloy material is preferably aluminum, magnesium, and titanium alloy. With the method, alloy material tissue can be compact, residue stress is low, and refined grains exist. With the method, yield strength, tensile strength, impact toughness, and anti-fatigue life of the alloy material can be greatly and simultaneously improved.

Description

technical field [0001] The invention relates to a strengthening treatment method for alloy materials, in particular to a treatment method for improving the strength, toughness and fatigue life of alloy materials. Background technique [0002] The preparation of alloy materials with high strength, high impact toughness and high fatigue life is the pursuit goal of materials scholars, but from the perspective of strengthening mechanism, there is a contradiction between the strength and toughness of alloy materials. With the adjustment of the national industrial structure and the development of the national economy, aviation, aerospace, high-tech and military industries have achieved considerable development, and higher and more urgent requirements have been put forward for lightweight, high-strength and tough alloy materials. Therefore, it is urgent to study a new alloy. The material processing method enables the alloy material to have high fatigue life characteristics while ob...

Claims

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Application Information

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IPC IPC(8): C21D1/78C21D6/04C21D10/00
Inventor 王占洪张勋寅朱晓宏
Owner CHANGZHOU RUNYUAN WARP KNITTING ENG TECH RES CENT
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