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AssigneesTaiho Kogyo Co., Ltd., Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
InventorsKimio Kawagoe, Soo-Myung Hon, Kenji Takenaka, Manabu Sugiura, Eiji Tokunaga
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In order to enhance the seizure resistance of a swash plate, which is the sliding part of a swash-plate type compressor, copper alloy is flame-sprayed on the swash plate. Depending upon the necessity, the following control of structure/composition: (a) a mixed structure is provided such that atomized bronze powder, which is melted during flame spraying, and an unmelted atomized structure are mixed; (b) Pb is not contained or contained slightly in the melted structure: (c) Sn, P, Al, Ag, Si, Mn, Cr, Ni, Zn, Pb and/or Bi is added to the copper; (d) hard matters are added to copper alloy; and, (e) an intermediate layer of Ni or the like is formed between the flame-sprayed layer and the substrate, is carried out.
A swash plate, which consists of an iron-based or aluminum-based material and is used in a swash-plate type compressor, is characterized in that a flame-sprayed copper-based alloy, which contains in total, by weight percentage, not less than 0.5% of one or more kind selected from a group consisting of not more than 40% of lead, not more than 30% of tin, not more than 0.5% of phosphorus, not more than 15% of aluminum, not more than 10% of silver, not more than 5% of silicon, not more than 5% of manganese, not more than 5% of chromium, not more than 20% of nickel, and not more than 30% of zinc, provided that when more than one kind is present, the total is not more than 50%,. balance essentially consisting of copper and impurities, is formed on at least a sliding surface with a shoe, and has a structure including an unmelted structure of an atomized copper alloy powder.
A method for preparing a sliding layer of a swash-plate type compressor, wherein a powder of copper alloy containing lead is sprayed on a swash plate consisting of an iron-based or aluminum-based material, characterized in that said powder is the first powder mainly composed of copper and containing less than 3% by weight of lead or being free of lead, and the second powder mainly composed of copper and containing from 3 to 40% of lead, and, further, the first powder is melted, and the second powder coarser than the first powder is not essentially melted, when a layer is formed on the swash-plate.
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