Method for coating sliding surface of high-temperature member, high-temperature member and electrode for electro-discharge surface treatment
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United States of America Patent
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Nov 17, 2015
Grant Date -
Feb 16, 2006
app pub date -
Oct 29, 2004
filing date -
Sep 24, 2002
priority date (Note) -
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Abstract
A sliding surface of a high-temperature portion is subjected to an electro-discharge surface treatment with one or both of a high-temperature hard material (4) and a material having a lubricating property at a high temperature (6). The high-temperature hard material (4) is any or a mixture of cBN, TiC, TiN, TiAlN, TiB2, WC, Cr3C2, SiC, ZrC, VC, B4C, Si3N4, ZrO2, and Al2O3. The material having the lubricating property at the high temperature (6) contains chromium and/or chromium oxide (Cr2O3) and/or hexaboron nitride (hBN). An electrode formed by compression molding of the high-temperature hard material, and the high-temperature lubricating material containing at least one of Cr and hBN and having the lubricating property at the high temperature is used as the electrode for the electro-discharge surface treatment.
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