Method of the plasma jet remelting of a surface layer of a flat metal work having parallel side edges and apparatus for carrying out the method
US4884625A · kind A · utility
Inventors
- Boris E. Paton
- Jury V. Latash
- Gennady Fedorovich Torkhov
- Nikolai V. Reida
- Alfred Iosifovich Bukalo
- Vladimir K. Kedrin
- Gary A. Melnik
- Igor S. Pryanishnikov
- Konstantin S. Tolstopyatov
- Lev R. Tager
- Mikhail M. Kljuev
- Jury I. Modelkin
- Boris P. Sokolkin
- Alexei K. Andrianov
- Valentin V. Topilin
- by Tatyana V. Topilina, administrator
- Sergei Grigorievich Guschin
- by Alevtina V. Guschina, administrator
- by Ljudmila S. Korobkova, administrator
- by Tatyana S. Kuznetsova, administrator
Key dates
| Filing date | Aug 22, 1984 |
| Grant date | Dec 5, 1989 |
| Priority date | — |
| Expiry date | Aug 22, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B9/226
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The method consists in that a flat work in an initial position is oriented horizontally between cooled mold beams. Plasma torches are arranged in line across the parallel side edges so that the anode spots of the extreme torches are confined by said edges of the work. By supplying a plasma forming gas and electric current to the plasma torches the work is heated with the formation of a metal pool which extends across the work from edge to edge. By relatively moving the work and the plasma torches in a horizontal plane and along the edges of the work movement of the metal pool over the surface thereof is effected and thereby a remelted layer as thick as the pool is deep, is obtained. The apparatus for carrying out the method comprises a sealed chamber containing a mold having two beams arranged in a horizontal plane and being parallel to one another. Installed in the chamber are plasma torches mounted on shafts and connected through supply lines with the sources of plasma forming gas, electric current and cooling water. Each of the shafts is journalled in a sealing bush installed in the wall of the sealed chamber so that the axis of the shaft is parallel to the beams. Each shaft is …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.