GB527725A - Improvements in and relating to the surface hardening of metal articles - Google Patents
Improvements in and relating to the surface hardening of metal articlesInfo
- Publication number
- GB527725A GB527725A GB11274/39A GB1127439A GB527725A GB 527725 A GB527725 A GB 527725A GB 11274/39 A GB11274/39 A GB 11274/39A GB 1127439 A GB1127439 A GB 1127439A GB 527725 A GB527725 A GB 527725A
- Authority
- GB
- United Kingdom
- Prior art keywords
- surface hardening
- april
- heat
- sodium
- nozzle
- 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
- C21D1/08—Surface hardening with flames
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)
- Other Surface Treatments For Metallic Materials (AREA)
- Ceramic Products (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
527,725. Surface hardening metal articles. NATIONAL CYLINDER GAS CO. April 13, 1939, No. 11274. Convention date, April 16, 1938. [Class 72] In the surface hardening of a metal article 10 by progressively advancing a sheet-like flame produced by an elongated nozzle 30 of an oxyacetlylene torch 25 to heat successive portions of the surface to the critical temperature and then chilling such portions immediately by a stream of water directed thereon from a nozzle 32 fitted into a supply pipe the heating and melting of the boundary edges of the surface is prevented by the application of a coating of heat resisting material 20 to the marginal surfaces at an angle to the surface treated. The heat resistant material may comprise an alkaline metal silicate used alone or as a binder, plumbago or other fire-resisting substances such as fireclay, alundum cement, silicon carbide, magnesite, asbestos, silica and porcelain powders such as sillimanite, made into a paste solution or suspension with binders such as sodium or sodium aluminium silicate, dextrine, glue, glucose or isinglass. In the drawing, the shaded portion only is covered with the material 20.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US527725XA | 1938-04-16 | 1938-04-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB527725A true GB527725A (en) | 1940-10-15 |
Family
ID=21979790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11274/39A Expired GB527725A (en) | 1938-04-16 | 1939-04-13 | Improvements in and relating to the surface hardening of metal articles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB527725A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2464351A (en) * | 1943-05-26 | 1949-03-15 | Linde Air Prod Co | Method of successively cutting and differentially hardening a toothed member |
| CN106222366A (en) * | 2016-08-26 | 2016-12-14 | 常熟中德重机有限公司 | A kind of process of surface treatment of high rigidity hoist roller |
-
1939
- 1939-04-13 GB GB11274/39A patent/GB527725A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2464351A (en) * | 1943-05-26 | 1949-03-15 | Linde Air Prod Co | Method of successively cutting and differentially hardening a toothed member |
| CN106222366A (en) * | 2016-08-26 | 2016-12-14 | 常熟中德重机有限公司 | A kind of process of surface treatment of high rigidity hoist roller |
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