Chromized heat-resistant alloy members and a process for the production thereof
US5882439A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 11, 1996 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Sep 11, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12854
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
To provide heat-resistant alloy members that maintain the resistance to corrosion at high temperature of the chromized layer formed on Ni- or Co-base heat-resistant alloys and which yet are improved in various mechanical properties. The improved Ni- or Co-base heat-resistant alloy member having a chromized layer that is characterized by having a chromium concentration of 25-80% and a thickness of 10-100 .mu.m. This member is produced by controlling both the vapor pressure of a chromium halide being used in chromization and the temperature therefor in such a way that the chromized layer being formed is adjusted to have a chromium concentration and a thickness within the ranges specified above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.