Method of determining components of a welding material having been overlaid onto a cast iron base metal
US5622573A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1995 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Mar 28, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K35/3086
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A welding material for hard-facing which is to be hardened by a supercooling treatment after overlaying onto a cast iron base metal has a basic component composition which meets, in an overlaid condition, both a first condition and a second condition. The first condition is that a nickel (Ni) equivalent and a chromium (Cr) equivalent fall within that region to be defined in Schaeffler's structure diagram in which a difference in hardness before and after the supercooling treatment is a predetermined value or above. The second condition is that a starting temperature of martensitic transformation is a predetermined temperature or below. The components of the welding material are determined by defining in Schaeffler's structure diagram a region in which a difference in hardness before and after the supercooling treatment becomes a predetermined value or above, obtaining a target composition in which the Ni equivalent and the Cr equivalent fall within the region and in which the starting temperature of martensitic transformation is a predetermined temperature or below, and determining the composition of basic components such that the target composition is attained in an overlaid condi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.