GB964418A - Steel of improved microstructure and process for its manufacture - Google Patents
Steel of improved microstructure and process for its manufactureInfo
- Publication number
- GB964418A GB964418A GB29729/60A GB2972960A GB964418A GB 964418 A GB964418 A GB 964418A GB 29729/60 A GB29729/60 A GB 29729/60A GB 2972960 A GB2972960 A GB 2972960A GB 964418 A GB964418 A GB 964418A
- Authority
- GB
- United Kingdom
- Prior art keywords
- steel
- heated
- workpiece
- manufacture
- microstructure
- 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
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
A steel structure at the surface of a steel workpiece, such as each tooth of a band saw blade, is heated at such an energy density, e.g. at least 2 Kilowatts/sq. cm., from below 600 DEG C. up to a temperature between 1000 DEG C. and the solidus point or beyond for a period not longer than 0.1 second, e.g. by feeding the structure between the two turns of a high frequency induction coil heater, or by means of electric spark discharge, and immediately cooling the heated structure wholly or mainly by heat transfer to the body of the workpiece within 0.01 second from the maximum temperature down to below 600 DEG C. to form a microstructure, e.g. to a maximum depth of 0.02 inch, which is hard and corrosion resistant to acid and has a grain size below 5 microns and less than 2% austenite. The work-piece may be pre-cooled to accelerate cooling. The steel may be martensically pre-hardened and/or carburized or nitrided prior to heating.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT624559A AT235884B (en) | 1959-08-28 | 1959-08-28 | Process for hardening iron-carbon alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB964418A true GB964418A (en) | 1964-07-22 |
Family
ID=3584341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29729/60A Expired GB964418A (en) | 1959-08-28 | 1960-08-29 | Steel of improved microstructure and process for its manufacture |
Country Status (4)
| Country | Link |
|---|---|
| AT (1) | AT235884B (en) |
| BE (1) | BE610882A (en) |
| CH (1) | CH428821A (en) |
| GB (1) | GB964418A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2206816C3 (en) * | 1972-02-12 | 1981-12-10 | Früngel, Frank, Dr.-Ing., Zürich | Device for producing extremely fine-grained metallic surface structures |
-
1959
- 1959-08-28 AT AT624559A patent/AT235884B/en active
-
1960
- 1960-08-25 CH CH962160A patent/CH428821A/en unknown
- 1960-08-29 GB GB29729/60A patent/GB964418A/en not_active Expired
-
1961
- 1961-11-28 BE BE610882A patent/BE610882A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AT235884B (en) | 1964-09-25 |
| CH428821A (en) | 1967-01-31 |
| BE610882A (en) | 1962-03-16 |
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