GB1104102A - Improvements in or relating to processes and apparatus for surface-hardening hardenable steels - Google Patents
Improvements in or relating to processes and apparatus for surface-hardening hardenable steelsInfo
- Publication number
- GB1104102A GB1104102A GB3910765A GB3910765A GB1104102A GB 1104102 A GB1104102 A GB 1104102A GB 3910765 A GB3910765 A GB 3910765A GB 3910765 A GB3910765 A GB 3910765A GB 1104102 A GB1104102 A GB 1104102A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plasma
- torch
- hardened
- conform
- effected
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
Abstract
A steel workpiece is surface hardened by heating it rapidly to form an austenitic layer metastable at room temperature using a plasma torch having no constricting aperture for the plasma (see Fig., not shown), and transforming the layer by applying further energy, preferably also effected with the aid of the plasma torch, into a fine-grained martensitic structure. The torch is provided with an additional charge carrier source to prevent deionizing the plasma. The cross-section and intensity of the plasma beam are controlled by varying the current intensity of the arc, and the quantity and type of gas conveyed so that the plasma beam can conform to the surface to be hardened. For continuous surface treatments, e.g. of cutting edges of tools or slideways, the shape of the plasma beam and rate at which energy is supplied through the beam are varied during treatment to conform changing configuration of the surface to be hardened. The torch may be operated with D.C. or A.C. Prior processes are disclosed wherein surface heating is effected by electron or laser beams.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT812164A AT262357B (en) | 1964-09-23 | 1964-09-23 | Process for surface hardening of hardenable steels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1104102A true GB1104102A (en) | 1968-02-21 |
Family
ID=3602734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3910765A Expired GB1104102A (en) | 1964-09-23 | 1965-09-14 | Improvements in or relating to processes and apparatus for surface-hardening hardenable steels |
Country Status (8)
| Country | Link |
|---|---|
| AT (1) | AT262357B (en) |
| BE (1) | BE669606A (en) |
| CH (1) | CH473223A (en) |
| DE (1) | DE1458981A1 (en) |
| FR (1) | FR1446184A (en) |
| GB (1) | GB1104102A (en) |
| NL (1) | NL6512001A (en) |
| SE (1) | SE319501B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0220940A2 (en) * | 1985-10-24 | 1987-05-06 | Kawasaki Steel Corporation | Process and apparatus for improvement of iron loss of electromagnetic steel sheet or amorphous material |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATA410976A (en) * | 1976-06-04 | 1981-06-15 | Siemens Ag Oesterreich | CONVEYOR ROLL FOR CONTINUOUS |
| DE2824373A1 (en) * | 1978-06-03 | 1979-12-06 | Aeg Elotherm Gmbh | PROCESS FOR SURFACE HARDENING OF A CAST-IRON WORKPIECE OF LIMITED THERMAL CAPACITY |
-
1964
- 1964-09-23 AT AT812164A patent/AT262357B/en active
-
1965
- 1965-09-03 SE SE11511/65A patent/SE319501B/xx unknown
- 1965-09-03 FR FR30365A patent/FR1446184A/en not_active Expired
- 1965-09-06 CH CH1248965A patent/CH473223A/en not_active IP Right Cessation
- 1965-09-09 DE DE19651458981 patent/DE1458981A1/en active Pending
- 1965-09-14 GB GB3910765A patent/GB1104102A/en not_active Expired
- 1965-09-14 BE BE669606D patent/BE669606A/xx unknown
- 1965-09-15 NL NL6512001A patent/NL6512001A/xx unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0220940A2 (en) * | 1985-10-24 | 1987-05-06 | Kawasaki Steel Corporation | Process and apparatus for improvement of iron loss of electromagnetic steel sheet or amorphous material |
| EP0220940A3 (en) * | 1985-10-24 | 1987-12-16 | Kawasaki Steel Corporation | Process and apparatus for improvement of iron loss of electromagnetic steel sheet or amorphous material |
| US4772338A (en) * | 1985-10-24 | 1988-09-20 | Kawasaki Steel Corporation | Process and apparatus for improvement of iron loss of electromagnetic steel sheet or amorphous material |
Also Published As
| Publication number | Publication date |
|---|---|
| CH473223A (en) | 1969-05-31 |
| NL6512001A (en) | 1966-03-24 |
| SE319501B (en) | 1970-01-19 |
| AT262357B (en) | 1968-06-10 |
| DE1458981A1 (en) | 1969-01-09 |
| BE669606A (en) | 1965-12-31 |
| FR1446184A (en) | 1966-07-15 |
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