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 s

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

Example Embodiment

[0034] Example 1:

[0035] A 7055 aluminum alloy bar is used as a 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%, the balance is Al.

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

[0037] Aging treatment; the aluminum alloy bar after solution treatment is placed in a heat treatment furnace at 120 o Keep the temperature at C for 24 hours, then take out the aluminum alloy bar from the heat treatment furnace and let it return to room temperature naturally.

[0038] Cryogenic treatment; place the aged aluminum alloy bar in a cryogenic box, starting from room temperature, cooling rate 1 o C / min, cooling the aluminum alloy bar to -196 o C is kept at t...

Example Embodiment

[0042] Example 2:

[0043] A 6 high-silicon (Si) aluminum alloy rod was used as a sample for strengthening treatment. The weight percentage of each component of the aluminum alloy was Si: 20%, Fe: 2.0%, Sr: 0.12%, and the balance was Al.

[0044] Solution treatment; place the aluminum alloy bar in a heat treatment furnace at 540 o Keep the temperature at C for 4h, then take out the aluminum alloy bar from the heat treatment furnace and let it return to room temperature naturally.

[0045] Aging treatment; the aluminum alloy bar after solution treatment is placed in a heat treatment furnace at 150 o Keep the temperature at C for 12 hours, then take out the aluminum alloy bar from the heat treatment furnace and let it return to room temperature naturally.

[0046] Cryogenic treatment; the aluminum alloy bar after aging treatment is placed in a cryogenic box, starting from room temperature at a cooling rate of 5 o C / min, cooling the aluminum alloy bar to -196 o Keep the temperature for 12...

Example Embodiment

[0050] Example 3:

[0051] Using ZK61 magnesium alloy bar as a sample for strengthening treatment, the weight percentage of each component of the magnesium alloy 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%, the balance is Mg.

[0052] Solution treatment; Place the magnesium alloy bar in a heat treatment furnace at 400 o Keep it at a temperature of C for 3h, then take the magnesium alloy bar out of the heat treatment furnace and let it return to room temperature naturally.

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

[0054] Cryogenic treatment: place the magnesium alloy bar after aging treatment in a cryogenic box, starting from room temperature, cooling rate 1 o C / min, cooling the magne...

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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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