Method for making a slide member
US7704337B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2005 |
| Grant date | Apr 27, 2010 |
| Priority date | — |
| Expiry date | Aug 28, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4927
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A sliding surface 4A of a shoe 4 undergoes laser radiation in a shape of a large number of parallel lines to form a large number of swollen portions 6 and concave portions 7 in adjacent positions thereof. The swollen portions 6 and the inner side thereof become direct-hardened portions 11 with a high hardness and the concave portions 7 and the inner side thereof become double-hardened portions 12, which are lower in hardness than the swollen portions 6. After the laser hardening, the sliding surface 4A undergoes lapping up to a position of an imaginary line 15 to delete the relief and form a flat and smooth plane. Thereafter the sliding surface 4A undergoes buffing so that portions with a low hardness are chipped off more than portions with a high hardness to form a large number of minute irregularities on the sliding surface 4A.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.