GB792731A - Pre-annealing treatment of titanium metal - Google Patents
Pre-annealing treatment of titanium metalInfo
- Publication number
- GB792731A GB792731A GB3012655A GB3012655A GB792731A GB 792731 A GB792731 A GB 792731A GB 3012655 A GB3012655 A GB 3012655A GB 3012655 A GB3012655 A GB 3012655A GB 792731 A GB792731 A GB 792731A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitrate
- composition
- titanium
- annealing
- diluent
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/008—Using a protective surface layer
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Before annealing titanium or titanium-base alloys at a temperature not exceeding 800 DEG C., a composition comprising an alkali metal nitrate is applied to the surface thereof, the effect of said composition being to make easier the subsequent removal of scale in a pickling solution such as one comprising nitric acid and hydrofluoric acid. The nitrate should have a melting point below the annealing temperature and is preferably sodium nitrate. To reduce its fluidity, the nitrate may be admixed with a diluent such as one or more alkali metal carbonates, e.g. sodium carbonate; a suitable composition is, by weight, nitrate 10-100 per cent, diluent 90-0 per cent. The composition may be applied (a) as a powder by sprinkling on a titanium surface which has been previously cleaned and wetted by a detergent solution, or (b) as a boiling, saturated solution. Annealing is generally performed at 650 DEG -750 DEG C. for 3 hours to 1/2 -hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3012655A GB792731A (en) | 1955-10-21 | 1955-10-21 | Pre-annealing treatment of titanium metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3012655A GB792731A (en) | 1955-10-21 | 1955-10-21 | Pre-annealing treatment of titanium metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB792731A true GB792731A (en) | 1958-04-02 |
Family
ID=10302707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3012655A Expired GB792731A (en) | 1955-10-21 | 1955-10-21 | Pre-annealing treatment of titanium metal |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB792731A (en) |
-
1955
- 1955-10-21 GB GB3012655A patent/GB792731A/en not_active Expired
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