Method of producing a structural member
US5599408A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 1994 |
| Grant date | Feb 4, 1997 |
| Priority date | — |
| Expiry date | May 4, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
.epsilon. phase precipitates in the matrix having a composition of 0.07% or less carbon, 1 or less silicon, 1% or less manganese, 2.5 to 5% copper, 3 to 5.5% nickel, 14 to 17.5% chromium, 0.5% or less molybdenum, 0.15 to 0.45% niobium, by weight, and the balance composed substantially of iron, and comprising 6 to 30 vol % austenitic phase and the balance composed substantially of martensitic phase. In a method of producing a structural member in which first solution treatment is performed at 1010.degree. to 1050.degree. C. on a stainless steel having a composition described above and first aging treatment is performed at a temperature not lower than 520.degree. C. and not higher than 630.degree. C., second solution treatment is performed at 730.degree. to 840.degree. C., and then second aging treatment is performed at a temperature not lower than 520.degree. C. and not higher than 630.degree. C. or a structural member of any shape is fabricated by means of welding work before the second solution treatment. Also, a structural member is produced by performing first solution treatment at 1010.degree. to 1050.degree. C. on a stainless steel having a composition described above, perform…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.