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Low-temperature high-strength and high-toughness wear-resistant aluminum and bronze alloy and preparing method thereof

A high-strength, high-toughness, aluminum bronze technology, applied in the field of wear-resistant aluminum bronze alloy and its preparation, can solve the problems of low impact toughness of mechanical properties, increased brittleness of aluminum bronze alloy, and reduced service life of parts, etc., to achieve good plastic deformation ability, The effect of improving the service life of the equipment and improving the comprehensive mechanical properties

Inactive Publication Date: 2017-07-04
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the mechanical properties of these aluminum-bronze alloys at liquid nitrogen temperature (-196°C), especially low-temperature impact toughness, are low, resulting in reduced service life of parts in low-temperature environments, or failing to meet service requirements
The reason is that the commonly used wear-resistant aluminum bronze alloy undergoes eutectoid transformation at 567°C during the forming process: β=α+γ 2 , its generated eutectoid α+γ 2 It belongs to the brittle phase of lamellar structure, which can improve the wear resistance of the material when used at room temperature, but increases the brittleness of aluminum bronze alloy and reduces the impact toughness of the alloy when used at low temperature

Method used

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  • Low-temperature high-strength and high-toughness wear-resistant aluminum and bronze alloy and preparing method thereof

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Embodiment 1

[0023] Its production process is: batching - casting - hot forging - equal channel angular extrusion - finished product

[0024] The specific process is as follows: 84.3% copper, 9.0% aluminum, 2.5% iron, 3.5% nickel, 0.5% manganese, and 0.2% titanium are made into alloy material, which is smelted by medium frequency induction melting furnace. The temperature is 1100-1200°C. The alloy material is added in one go and solvents (glass, cryolite) are added to cover and refine the molten alloy. After standing still and removing slag, it is poured into a Φ200mm ingot. After the ingot wagon is cut to size, it is forged and deformed at a temperature of 850°C. First, it is forged in one direction, with a reduction of 25-30% per pass; then the billet is turned 90°, and the same as the previous one Forging; according to this method, a total of 3 forgings are carried out, with a total reduction of 80%, and finally air-cooled to room temperature to make a copper alloy forging.

[0025] ...

Embodiment 2

[0027] Its production process is: batching - casting - hot forging - equal channel angular extrusion - finished product

[0028] The specific process is as follows: 82.8% copper, 11.0% aluminum, 3.0% iron, 2.5% nickel, 0.5% manganese, and 0.2% titanium are made into alloy material, which is smelted by medium frequency induction melting furnace. The temperature is 1100-1200°C. The alloy material is added in one go and solvents (glass, cryolite) are added to cover and refine the molten alloy. After standing still and removing slag, it is poured into a Φ200mm ingot. After the ingot wagon is cut to size, it is forged and deformed at a temperature of 800°C. First, it is forged in one direction, with a reduction of 20-25% per pass; then the billet is turned 90°, and the same as the previous one Forging; according to this method, a total of 4 forgings are carried out, with a total reduction of 85%, and finally air-cooled to room temperature to make a copper alloy forging.

[0029]...

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Abstract

The invention discloses low-temperature high-strength and high-toughness wear-resistant aluminum and bronze alloy and a preparing method thereof. The aluminum and bronze alloy comprises the following components in a percent by weight: 6.5-12.0% of aluminum, 2.0-5.5% of iron, 2.5-6.0% of nickel, 0.5-3.0% of manganese, 0.2-0.3% of titanium and the balance of bronze. The aluminum and bronze alloy is prepared by carrying out a casting and hot-forging technology and an equal-channel angular extrusion technology on metal raw materials corresponding to each component. The aluminum and bronze alloy has better impact toughness at the low temperature of -196 DEG C than at room temperature, and the comprehensive mechanical properties of the aluminum and bronze alloy are obviously improved. The aluminum and bronze alloy is particularly suitable for manufacturing wear-resistant parts used in low-temperature environments in the fields of aviation, aerospace and the like and has great meaning in reducing production cost, improving product quality and prolonging the service life of equipment.

Description

technical field [0001] The invention relates to a wear-resistant aluminum bronze alloy with high strength and high impact toughness at a low temperature of -196°C and a preparation method thereof, belonging to the technical field of metal materials and their preparation. Background technique [0002] The research on wear-resistant copper alloy materials has a long history at home and abroad, and a variety of alloy materials have come out, such as complex brass, tin bronze, aluminum bronze and other alloys. Compared with these alloys, aluminum bronze alloys can be widely used in aerospace, military, petrochemical, transportation and other fields due to their higher strength, hardness and wear resistance, as well as excellent corrosion resistance. Grind parts. For example, QA110-3-1.5 and QA110-4-4 alloys are used for gears, bushings, bearings, etc.; QA19-4-4-2 alloys are used for propellers, valves, impellers, etc.; Cu14A1-X high aluminum complex bronze is used for molds Ma...

Claims

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Application Information

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IPC IPC(8): C22C9/01C22F1/08
CPCC22C9/01C22F1/08
Inventor 刘冬梅王强松解国良
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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