GB635964A - Improvements in heat treatment baths - Google Patents
Improvements in heat treatment bathsInfo
- Publication number
- GB635964A GB635964A GB7724/45A GB772445A GB635964A GB 635964 A GB635964 A GB 635964A GB 7724/45 A GB7724/45 A GB 7724/45A GB 772445 A GB772445 A GB 772445A GB 635964 A GB635964 A GB 635964A
- Authority
- GB
- United Kingdom
- Prior art keywords
- baths
- bath
- metals
- materials
- heat treatment
- 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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/607—Molten salts
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)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Metals and alloys are heat treated by introducing them into a series of two or more fused salt baths in succession, the baths being maintained at temperatures of 1,700 DEG F-500 DEG F and being composed of mixtures of materials having no oxygen molecules therein and which are harmonious throughout the two or more baths to the extent that material carried over by the metals or into a succeeding bath will not introduce any materials not already present in each succeeding bath or cause any qualitative change in the composition of the said bath. In one case the series consists of three baths, the first being operated at 1,350 DEG -1,700 DEG F, the second at 500-700 DEG F and the third at 700-1,100 DEG F. The first bath consists of 39-50 per cent by weight of potassium chloride, 40-60 of sodium chloride and 1-10 of sodium fluoride and the second and third baths are of the composition set out in Specification 636,027.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US635964XA | 1944-05-18 | 1944-05-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB635964A true GB635964A (en) | 1950-04-19 |
Family
ID=22050245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7724/45A Expired GB635964A (en) | 1944-05-18 | 1945-03-27 | Improvements in heat treatment baths |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB635964A (en) |
-
1945
- 1945-03-27 GB GB7724/45A patent/GB635964A/en not_active Expired
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