Method for improving a metal casting
Abstract
Abstract A METAL RING OF AN ALLOY BASED ON AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF NI, CO, FE AND TI AND HAVING INTERNAL DISCONTNUITIES, SUCH AS POROSITY, MICROFISSURES AND INTERNAL TEARS, IS IMPROVED BY APPLYING PRESSURE TO AN OUTER SURFACE OF THE CASTING SURROUNDING THE DISCONTINUITIES WHILE AT THE SAME TIME HEATING THE CASTING, AT LEAST IN ITS PORTION INCLUDING THE DISCONTINUITIES, AT A TEMPERATURE LESS THAN THAT WHICH WILL CAUSE SUBSTANTIAL DEGRATION OF THE MECHANICAL PROPERTIES OF THE METAL. THE CASTING OUTER SURFACE I COATED WITH A COATING OF SUFFICIENT THICKNESS TO BRIDGE HE SURFACE OPENINGS OF THE SURFACE-CONNECTED DISCONTINUITIES AND TO PREVENT PENETRATION OF THE PRESSURIZING FLUID INTO SUCH SURFACE DISCONTINUITIES. THE COMBINED AMOUNT OF AND TIME OF APPLICATION OF PRESSURE AND THE HEATING IS SUFFICIENT TO PRESS TOGETHER AND TO DIFFUSION BOND WALLS OF THE DISCONTINUITY.
Inventors
- 👤 K Stalker
Bibliographic Details
Claims Analysis
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| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |