United States Patent
US Patent 4227945: Method for preventing decarburization of steel…
US 4227945 · granted 1980-10-14
Abstract
A method for preventing decarburization of a steel material comprising applying a mixture of SiC powder and metallic Al powder on the steel material, further applying an oxidation inhibitor thereon, and heating thus coated steel material, so as to give 30 to 500 g/m.sup.2 SiC on the steel material. The present method is particularly useful for preventing the lowering in strength of steel materials due to the surfacial decarburization.
| Patent Number | 4227945 |
|---|---|
| Title | Method for preventing decarburization of steel materials |
| Filed | 1979-02-06 |
| Granted | 1980-10-14 |
| Inventor(s) | Kitayama; Minoru, Odashima; Hisao |
| Assignee | Nippon Steel Corporation |
| Number of Claims | 7 |
Abstract
A method for preventing decarburization of a steel material comprising applying a mixture of SiC powder and metallic Al powder on the steel material, further applying an oxidation inhibitor thereon, and heating thus coated steel material, so as to give 30 to 500 g/m.sup.2 SiC on the steel material. The present method is particularly useful for preventing the lowering in strength of steel materials due to the surfacial decarburization.
Claim 1
A method for preventing decarburization of a steel material comprising applying a mixture consisting essentially of 10 to 500 parts by weight of metallic aluminum powderper 100 parts by weight of silicon carbide in an amount to give 10 to 1,000 g/m.sup.2 silicon carbide on the steel material, further applying a solid coating type oxidation inhibitor thereon, and heating the thus coated steel material at a temperaturerange wherein carburization would normally occur.
Claims
7 totalA method for preventing decarburization of a steel material comprising applying a mixture consisting essentially of 10 to 500 parts by weight of metallic aluminum powderper 100 parts by weight of silicon carbide in an amount to give 10 to 1,000 g/m.sup.2 silicon carbide on the steel material, further applying a solid coating type oxidation inhibitor thereon, and heating the thus coated steel material at a temperaturerange wherein carburization would normally occur.