Claims
- 1. A surface-diffused part comprising a ferrous-based substrate and a zone at the surface of said substrate containing 12 to 45% chromium by weight, said zone having an outer surface which is substantially smooth and is free of gross porosity, said part being made by the process of providing a ferrous-based substrate and contacting said substrate with a molten alloy bath consisting essentially of lead and chromium as a surface-diffusing element, lead being the only transfer agent in said bath, said bath containing less than 0.85% chromium by bath weight of said lead, and diffusing said chromium into said substrate.
- 2. The part of claim 1, wherein it is made in a bath containing chromium as the only surface diffusing element.
Parent Case Info
This is a division of application Ser. No. 840,368, filed Oct. 7, 1977, now U.S. Pat. No. 4,168,333.
US Referenced Citations (3)
Foreign Referenced Citations (1)
Number |
Date |
Country |
878028 |
Sep 1961 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
840368 |
Oct 1977 |
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