GB323496A - Improvements relating to the heat-treatment of metallic products for bright annealing and analogous purposes - Google Patents
Improvements relating to the heat-treatment of metallic products for bright annealing and analogous purposesInfo
- Publication number
- GB323496A GB323496A GB1886128A GB1886128A GB323496A GB 323496 A GB323496 A GB 323496A GB 1886128 A GB1886128 A GB 1886128A GB 1886128 A GB1886128 A GB 1886128A GB 323496 A GB323496 A GB 323496A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydrogen
- goods
- supplied
- atmosphere
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
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)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
323,496. Sadler, A., (American Mond Nickel Co.). June 29, 1928. Drawings to Specification. Annealing; cementation.-In a process of reducing, or preventing the formation of, oxide coatings during the heat treatment of metallic goods in an electric or other furnace, a mixture of nitrogen or other inert gas and hydrogen is supplied to the heating part of the furnace and is of such low hydrogen content, viz., 2-15 per cent, and the volume of gas supplied is so predetermined that, during the deoxidation of the goods, the whole or practically the whole of the hydrogen is used up or taken out of the atmosphere. The goods after their progress through, or removal from, the heating chamber are thus cooled down in an atmosphere of nitrogen or one which contains a negligible amount of hydrogen. The goods may be passed intermittently through preheating, heating, and cooling chambers, the gas being supplied to the heating chamber in a continuous or intermittent stream. For hotrolled nickel sheets an atmosphere containing 2 per cent of hydrogen is used. Specification 132/11 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1886128A GB323496A (en) | 1928-06-29 | 1928-06-29 | Improvements relating to the heat-treatment of metallic products for bright annealing and analogous purposes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1886128A GB323496A (en) | 1928-06-29 | 1928-06-29 | Improvements relating to the heat-treatment of metallic products for bright annealing and analogous purposes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB323496A true GB323496A (en) | 1929-12-30 |
Family
ID=10119661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1886128A Expired GB323496A (en) | 1928-06-29 | 1928-06-29 | Improvements relating to the heat-treatment of metallic products for bright annealing and analogous purposes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB323496A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2594129A (en) * | 1948-04-10 | 1952-04-22 | Air Reduction | Method of preparing surfaces for tinning |
-
1928
- 1928-06-29 GB GB1886128A patent/GB323496A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2594129A (en) * | 1948-04-10 | 1952-04-22 | Air Reduction | Method of preparing surfaces for tinning |
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