Aluminum alloy for compressor sliding member, compressor sliding member forging, and manufacturing method thereof

A technology of sliding parts and compressors, which is applied in the field of aluminum alloy, can solve the problems of uneven thickness of aluminum oxide film, decrease of hardness of aluminum oxide film, hindering the growth of aluminum oxide film, etc., and achieve excellent film strength, sufficient tensile strength, excellent Effect of Aluminum Oxide Film Treatability

Active Publication Date: 2022-07-15
RESONAC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the scroll is manufactured using the above-mentioned aluminum alloy, as the final process, aluminum oxide film treatment (alumite) is performed, but in order to ensure the mechanical properties of the aluminum alloy as the base, aluminum is added at a high concentration. Si, Cu, Mg and other metals are added, so there are problems that these added metals, especially Cu, hinder the growth of the aluminum oxide film, causing uneven thickness of the aluminum oxide film (alumite film), and lowering the hardness of the aluminum oxide film

Method used

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  • Aluminum alloy for compressor sliding member, compressor sliding member forging, and manufacturing method thereof
  • Aluminum alloy for compressor sliding member, compressor sliding member forging, and manufacturing method thereof
  • Aluminum alloy for compressor sliding member, compressor sliding member forging, and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] By continuously casting an aluminum alloy melt containing Si: 10.0 mass %, Cu: 0.9 mass %, Mg: 0.3 mass %, Mn: 0.5 mass %, and the balance consisting of Al and unavoidable impurities, obtained Cast material (cast material) with a diameter of 82 mm. The cooling rate at the time of casting was 15 degreeC / sec. After the homogenization heat treatment in which the obtained cast material was heated under the conditions of 470° C.×7 hours, it was air-cooled.

[0082] After cutting the above-mentioned cast material into a length of 30 mm, forging was performed at a material temperature of 420°C and a die temperature of 180°C. In the forging, 80% upsetting was performed in the direction parallel to the axial direction of the cast material, assuming the bottom of the scroll forged product, to obtain a forged material.

[0083] The forged material was heated at 510°C for 3 hours to perform solution treatment, and then water quenched with water at 25°C. Next, artificial aging tr...

Embodiment 2

[0085] A forged product was obtained in the same manner as in Example 1, except that the aluminum alloy melt having the alloy composition (containing inevitable impurities) shown in Table 1 was used.

Embodiment 4

[0087] A forged product was obtained in the same manner as in Example 1, except that the aluminum alloy melt having the alloy composition (containing unavoidable impurities) shown in Table 1 was used, and the solution treatment temperature was set to 540°C. .

[0088]

[0089] A forged product was obtained in the same manner as in Example 1, except that the aluminum alloy melt having the alloy composition (containing inevitable impurities) shown in Table 1 was used.

[0090]

[0091] A forged product was obtained in the same manner as in Example 1, except that the aluminum alloy melt having the alloy composition (containing unavoidable impurities) shown in Table 1 was used, and the solution treatment temperature was set to 550°C. .

[0092]

[0093] A forged product was obtained in the same manner as in Example 1, except that the aluminum alloy melt having the alloy composition (containing unavoidable impurities) shown in Table 1 was used, and the solution treatment tem...

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Abstract

An aluminum alloy for a compressor sliding member containing Si: 8.0 to 12.0 mass %, Cu: 0.6 to 1.2 mass %, Mg: 0.2 to 0.8 mass %, and Mn: 0.05 to 0.8 mass % %, and the balance contains Al and unavoidable impurities, the tensile strength at 25 ℃ is 330MPa~380Mpa; the equivalent circle diameter is 0.5μm~5μm Al-Mn-Si intermetallic compound The ratio of the area to the area of ​​the Al-Mn-Si intermetallic compound with an equivalent circle diameter of 0.5 μm or more was 90% or more; no crystals containing more than 1 mass % of Cu and with an equivalent circle diameter of more than 5 μm were present.

Description

technical field [0001] The present invention relates to a sliding member represented by a compressor (compressor) for vehicle air conditioning, and more particularly, to an aluminum alloy that can be favorably used for scrolls and electric scrolls. Background technique [0002] In recent years, the demand for improved fuel economy in the automobile industry has led to increasing demands for weight reduction and high functionality of various components used in automobiles, such as compressors for vehicle air conditioners. There are various types of compressors for vehicle air conditioners, and with the above-mentioned background, scroll type compressors are becoming popular as small compressors. For such members, instead of steel materials and cast iron materials, aluminum alloys having a high ratio of strength to weight, that is, specific strength, have been used. In particular, Al-Si, which has high strength at high temperature and is excellent in wear resistance during sl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/02C22F1/043F04C18/02F04C29/00
CPCC22C21/02C22C1/026C22F1/043F04C18/0215F04C29/00F04C18/02C22C1/02F05C2201/021B21J5/002
Inventor 丸山匠
Owner RESONAC CORPORATION
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