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Highly corrosion-resistant members and processes for production thereof

A technology with high corrosion resistance and manufacturing method, applied in bearing components, rotating parts resistant to centrifugal force, ion implantation plating, etc., can solve problems such as intolerance to long-term use, and achieve excellent corrosion resistance.

Inactive Publication Date: 2009-11-11
JTEKT CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, if the existing covering member is used for the constituent parts of the water pump, there is a concern that it will not withstand long-term use.

Method used

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  • Highly corrosion-resistant members and processes for production thereof
  • Highly corrosion-resistant members and processes for production thereof
  • Highly corrosion-resistant members and processes for production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] In the present embodiment, a titanium film (intermediate layer) and a DLC film are formed on the outer peripheral surface of the base material in the following order to produce Figure 4 The pump shaft 10 is shown.

[0064] In addition, a PIG type plasma CVD apparatus (APIG-1060D, hereinafter abbreviated as "PIG") manufactured by Shinko Seiki Co., Ltd. was used for the formation of the titanium film and the DLC film. The PIG device has a plasma source consisting of a hot cathode filament and an anode. The source gas introduced into the device is decomposed and dissociated by the plasma generated in the plasma source, and a film is formed on the surface of the substrate (hot cathode PIG plasma CVD method). In addition, since the sputtering cathode connected to the DC power supply is arranged in this PIG device, the film formation can also be performed by the DC sputtering method. The surface temperature of the substrate is measured by a thermocouple arranged near the sub...

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Abstract

A highly corrosion-resistant member which comprises a stainless steel substrate, an inner layer covering at least part of the surface of the substrate, and an amorphous carbon film covering at least part of the surface of the inner layer and which is produced by forming the inner layer and the amorphous carbon film at least at a surface temperature of the substrate of as low as 450 DEG C or below; and a highly corrosion-resistant member which comprises a stainless steel substrate whose surface is nitrided and an amorphous carbon film covering at least part of the surface of the substrate and which is produced by conducting the nitriding and the formation of the amorphous carbon film at least at a surface temperature of the substrate of as low as 450 DEG C or below. In the step of producing the above corrosion-resistant members, the surface of the stainless steel substrate is not exposed to high temperature (> 450 DEG C), so that the members exhibit corrosion resistance equivalent to that of original stainless steel.

Description

technical field [0001] The present invention relates to a highly corrosion-resistant member exhibiting high corrosion resistance even when used in an environment where corrosion is likely to occur, and a method for producing the same. Background technique [0002] Amorphous carbon (diamond-like carbon: DLC) having an amorphous structure has excellent mechanical properties such as wear resistance and solid lubricity, and also has corrosion resistance, insulation, visible light / infrared light transmittance, oxygen barrier properties, and the like. Therefore, an amorphous carbon film is often used as a protective film by covering the surface of the substrate. For example, Patent Document 1 discloses a water-lubricated bearing that slides using water as a lubricating fluid. The water-lubricated bearing includes a rotating-side member fixed to the rotating side, and a fixed-side member fixed to the fixed side so as to slide against the rotating-side member. According to Example...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/26C23C8/38C23C8/50C23C14/14C23C28/00C23C28/04F16C33/24
CPCC23C28/00C23C28/322C23C16/26C23C28/347C23C8/26C23C8/80F16C33/12C23C14/024C23C14/0605C23C28/04F16C33/16F16C2206/04C23C28/044C23C28/046C23C28/343C23C16/0272F16C33/14F16C33/122F16C2223/14F16C2223/60Y10T428/12625Y10T428/31678
Inventor 齐藤利幸铃木雅裕桥富弘幸
Owner JTEKT CORP
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