GB716639A - An improved process for surface hardening of metals - Google Patents
An improved process for surface hardening of metalsInfo
- Publication number
- GB716639A GB716639A GB5199/52A GB519952A GB716639A GB 716639 A GB716639 A GB 716639A GB 5199/52 A GB5199/52 A GB 5199/52A GB 519952 A GB519952 A GB 519952A GB 716639 A GB716639 A GB 716639A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heating
- work
- pieces
- cooling
- heat
- 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
- C21D1/34—Methods of heating
- C21D1/40—Direct resistance heating
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
716,639. Heat treating ferrous metals. WALTL H. M. Feb. 27, 1952 [March 9, 1951], No. 5199/52. Class 72 The outer surface of solid elongated work-pieces of steel and ferrous castings is deep hardened by heating the pieces by radiation from a resistance element and ther cooling them by cooling means, the work-pieces being moved relatively to the heat ing and cooling means solely in the direction from heating to cooling. As shown, a work-piece 1, which may be rotated is moved in the direction of the arrow A through a heating unit having resistance elements 2, 4, a pipe 7 supplying a gas, e.g. hydrogen or nitrogen, to the heating zone, and a coil 6 from which a quenching medium is directed against the heated part. The movement of the work-piece may be continuous or intermittent. There are preferably three segments in the heater each of which is fed from one phase of a three-phase supply. The heating elements may be shielded by a heat-resisting covering which may be extended to provide a preheating zone.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT716639X | 1951-03-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB716639A true GB716639A (en) | 1954-10-13 |
Family
ID=3679783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5199/52A Expired GB716639A (en) | 1951-03-09 | 1952-02-27 | An improved process for surface hardening of metals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB716639A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4040520C2 (en) * | 1989-12-29 | 2000-12-28 | Dana Corp | Method of manufacturing an induction hardened iron torque transmitting shaft |
-
1952
- 1952-02-27 GB GB5199/52A patent/GB716639A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4040520C2 (en) * | 1989-12-29 | 2000-12-28 | Dana Corp | Method of manufacturing an induction hardened iron torque transmitting shaft |
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