GB882462A - Process for increasing the hardness of steel surfaces - Google Patents
Process for increasing the hardness of steel surfacesInfo
- Publication number
- GB882462A GB882462A GB1019/58A GB101958A GB882462A GB 882462 A GB882462 A GB 882462A GB 1019/58 A GB1019/58 A GB 1019/58A GB 101958 A GB101958 A GB 101958A GB 882462 A GB882462 A GB 882462A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cooling
- hardened
- rapidly
- focus
- radiation
- 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
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)
Abstract
Steel is surface hardened by extremely rapidly heating a thin surface layer to above the Ac3 point and cooling so rapidly as to produce a surface with hardness exceeding 926 kg/sq. cm. V.H.N. and containing less than 2% austenite, the structure of this surface being incapable of resolution under a metal-lurgical microscope. Heating may be by frictional contact with a rapidly revolving wheel or with a stream of high velocity particles, by radiation from a heat source located at one focus of an ellipsoidal reflecting surface, the surface to be treated being progressively exposed to heat at the other focus, or by radiation similarly focused by a parabolidal reflector and lens system. Cooling may be by the mass effect of the body of the material, which effect may be accentuated by pre-cooling the body being surface hardened or quenching, the transformation to the hardened structure being aided by mechanical or sonic vibration.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH882462X | 1957-01-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB882462A true GB882462A (en) | 1961-11-15 |
Family
ID=4544951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1019/58A Expired GB882462A (en) | 1957-01-12 | 1958-01-10 | Process for increasing the hardness of steel surfaces |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB882462A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0426903A1 (en) * | 1989-11-06 | 1991-05-15 | Maurits Jan Maria Demeyere | Procedure for the treatment of the surface of a metal receptacle and receptacle treated according to this procedure |
US5707181A (en) * | 1995-01-04 | 1998-01-13 | Dyckerhoff & Widmann Aktiengesellschaft | Method of producing an intended breaking point in a tension member for a soil anchor |
-
1958
- 1958-01-10 GB GB1019/58A patent/GB882462A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0426903A1 (en) * | 1989-11-06 | 1991-05-15 | Maurits Jan Maria Demeyere | Procedure for the treatment of the surface of a metal receptacle and receptacle treated according to this procedure |
US5707181A (en) * | 1995-01-04 | 1998-01-13 | Dyckerhoff & Widmann Aktiengesellschaft | Method of producing an intended breaking point in a tension member for a soil anchor |
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