GB508541A - A process for regulating and maintaining the activity of melt baths adapted for the heat treatment of light metals and alloys thereof - Google Patents
A process for regulating and maintaining the activity of melt baths adapted for the heat treatment of light metals and alloys thereofInfo
- Publication number
- GB508541A GB508541A GB3600937A GB3600937A GB508541A GB 508541 A GB508541 A GB 508541A GB 3600937 A GB3600937 A GB 3600937A GB 3600937 A GB3600937 A GB 3600937A GB 508541 A GB508541 A GB 508541A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali
- alloys
- nitrate
- light metals
- regulating
- 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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
- B23K11/004—Welding of a small piece to a great or broad piece
- B23K11/0046—Welding of a small piece to a great or broad piece the extremity of a small piece being welded to a base, e.g. cooling studs or fins to tubes or plates
- B23K11/0053—Stud welding, i.e. resistive
-
- 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
- C21D1/44—Methods of heating in heat-treatment baths
- C21D1/46—Salt baths
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Physics & Mathematics (AREA)
- Luminescent Compositions (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Anti-Oxidant Or Stabilizer Compositions (AREA)
- Chemical Treatment Of Metals (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
508,541. Heat treating light metals and their alloys. DEUTSCHE GOLDUND SILBER-SCHEIDEANSTALT VORM. ROESSLER. Dec. 29, 1937, Nos. 36009 and 36010. Convention dates, Dec. 31, 1936 and Feb. 9, 1937. [Class 72] In a process for regulating and maintaining the activity of alkali nitrate and/or alkalinitrate containing melt baths for the heattreatment of light metals and their alloys, the formation or accumulation of disturbing quantitites of alkaline compounds is counteracted by the periodic or gradual addition of acid salts, acid-yielding compounds or other alkali-fixing compounds in quantities sufficient to render the alkaline compounds formed non-detrimental. Examples of such additions are alkali or ammonium metaphosphates, acid phosphates, pyrophosphates, neutral ammonium salts such as the chloride or nitrate or alkali bichromates which must be mixed with other bath constituents, e.g. alkali nitrate, the mixture preferably containing at least 5 parts by weight of other salts, e.g. alkali nitrate, for every 1 part by weight of bichromate. The addition of the salt mixture is effected at temperatures which are not considerably, preferably not more than 100‹ C., above the melting point of the bath.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201360X | 1936-12-31 | ||
| DED74553D DE752422C (en) | 1936-12-31 | 1937-02-10 | Process for the treatment of light metals in nitrates or nitrate-nitrite mixtures and fused baths containing bichromate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB508541A true GB508541A (en) | 1939-06-29 |
Family
ID=25749987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3600937A Expired GB508541A (en) | 1936-12-31 | 1937-12-29 | A process for regulating and maintaining the activity of melt baths adapted for the heat treatment of light metals and alloys thereof |
Country Status (5)
| Country | Link |
|---|---|
| AT (1) | AT160307B (en) |
| CH (1) | CH201360A (en) |
| DE (1) | DE752422C (en) |
| FR (1) | FR831403A (en) |
| GB (1) | GB508541A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT129294B (en) * | 1929-12-11 | 1933-07-25 | Ig Farbenindustrie Ag | Process for protecting magnesium and magnesium alloys against attack by heating baths made from molten salt. |
| US1840562A (en) * | 1931-02-20 | 1932-01-12 | Aluminum Co Of America | Method of heat-treating aluminum and articles thereby |
-
1937
- 1937-02-10 DE DED74553D patent/DE752422C/en not_active Expired
- 1937-12-20 CH CH201360D patent/CH201360A/en unknown
- 1937-12-21 AT AT160307D patent/AT160307B/en active
- 1937-12-28 FR FR831403D patent/FR831403A/en not_active Expired
- 1937-12-29 GB GB3600937A patent/GB508541A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT160307B (en) | 1941-04-10 |
| CH201360A (en) | 1938-11-30 |
| FR831403A (en) | 1938-09-02 |
| DE752422C (en) | 1952-11-04 |
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