Heat treatment method for additive manufactured Ni-base alloy object, method for manufacturing additive manufactured Ni-base alloy object, Ni-base alloy powder for additive manufactured object, and additive manufactured Ni-base alloy object
US11458537B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2018 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Nov 11, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/25
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A heat treatment method for an additive manufactured object formed of a laminate-molded Ni-base alloy includes: a heat treatment step for carbide precipitation optimization of heating the additive manufactured object for 1 hour or longer and 100 hours or shorter at a temperature which is equal to or higher than a temperature T1 determined by Formula (1) according to amounts of component elements and is equal to or lower than 1,350° C.; and an aging treatment step of heating the additive manufactured object for 1 to 30 hours at a temperature of 800° C. to 950° C. after the heat treatment step for carbide precipitation optimization. T1 (° C.)=177×Ni (%)+176×Co (%)+172×Cr (%)+178×Mo (%)+174×W (%)+171×Al (%)+170×Ti (%)+168×Ta (%)+163×Nb (%)+307×C (%)−16259 (1)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.