Mold for casting and method for manufacture thereof
US7497243B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2003 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Oct 28, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D17/2209
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A mold for casting primarily of SMC420, wherein a cavity forming portion comprising maraging steel, which has the toughness and the resistance to heat shock superior to those of SMC420, is provided in a vertical wall heading for a cavity surface from a molten metal inlet and a portion nearest to the molten metal inlet in the cavity surface, which are portions suffering relatively large heat shock in the contact with a molten metal. Also provided is a method for providing the cavity forming portion, which comprises filling a concave portion of the mold with a molten metal prepared by melting a welding rod by arc welding, in other words, carrying out an overlaying welding, and then cooling and solidifying the molten metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.