GB887506A - Improvements in the heat treatment of metals by plasma heating - Google Patents
Improvements in the heat treatment of metals by plasma heatingInfo
- Publication number
- GB887506A GB887506A GB25649/59A GB2564959A GB887506A GB 887506 A GB887506 A GB 887506A GB 25649/59 A GB25649/59 A GB 25649/59A GB 2564959 A GB2564959 A GB 2564959A GB 887506 A GB887506 A GB 887506A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- nozzle
- plasma
- free plasma
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
887,506. Surface hardening. PLASMA FLAME CORPORATION. July 27, 1959 [Sept. 18, 1958], No. 25649/59. Class 72. [Also in Group XI] A process of surface hardening steel comprises directing a free plasma stream into contact with the steel and then quenching. As shown, a free plasma stream may be produced by passing a gas, e.g. nitrogen, from a connection 37 through a tube 38 to distributing passages 39 into a space 36. The gas then passes between an electrode 28, of frusto-conical shape, and a nozzle 32 of platinum, silver or copper. An arc is struck between the electrodes and the nozzle and the gas is converted into a free plasma, and, by varying the gas flow the position of the arc in the nozzle may be adjusted. The free plasma is directed against the steel to be heated and, since the plasma may have a temperature of about 16,500‹F. heating is very rapid. The heated piece is then quenched and a hardened surface less than <SP>3</SP>/ 32 inch thick may be produced. The apparatus may be water-cooled, the water being introduced through the electric supply cables. Specification 863,189, is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US887506XA | 1958-09-18 | 1958-09-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB887506A true GB887506A (en) | 1962-01-17 |
Family
ID=22213229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25649/59A Expired GB887506A (en) | 1958-09-18 | 1959-07-27 | Improvements in the heat treatment of metals by plasma heating |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB887506A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0324294A1 (en) * | 1987-12-30 | 1989-07-19 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for heat treating metals or metal alloys in a thermal plasma flame |
-
1959
- 1959-07-27 GB GB25649/59A patent/GB887506A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0324294A1 (en) * | 1987-12-30 | 1989-07-19 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for heat treating metals or metal alloys in a thermal plasma flame |
| US4872926A (en) * | 1987-12-30 | 1989-10-10 | American Air Liquide | Process for heat treating metals or metal alloys in a thermal plasma |
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