GB801463A - Process for annealing steel in a vacuum - Google Patents
Process for annealing steel in a vacuumInfo
- Publication number
- GB801463A GB801463A GB22895/55A GB2289555A GB801463A GB 801463 A GB801463 A GB 801463A GB 22895/55 A GB22895/55 A GB 22895/55A GB 2289555 A GB2289555 A GB 2289555A GB 801463 A GB801463 A GB 801463A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- steels
- vacuum
- annealed
- annealing
- 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
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
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)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
Steels containing more than 0.25 per cent carbon and which are susceptable to surface decarburization are annealed in a vacuum in which the pressure is maintained at not more than 0.1 mm. of mercury. The steels may be pickled before annealing in vacuum but in the case of steels which are sensitive to pickling, e.g. NiCr stainless steels, this operation may be performed after annealing, or such steels may be annealed at low temperature, e.g. 650 DEG C., pickled, and then vacuum annealed. If the steels show surface decarburization before annealing they may be heated in a carburizing atmosphere during or after the vacuum anneal. Stainless steels having analyses 0.25-1.5 per cent C, 10-30 per cent Cr, up to 5.0 per cent Ni, up to 5 per cent Si, up to 5 per cent Mn, Mo, W, V, Co, Al individually or in combination, and up to 2 per cent of each of Ti, Nb, N, and Cu, the balance being iron and unavoidable impurities, may be treated by the process.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT801463X | 1954-08-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB801463A true GB801463A (en) | 1958-09-17 |
Family
ID=3681156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22895/55A Expired GB801463A (en) | 1954-08-11 | 1955-08-09 | Process for annealing steel in a vacuum |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB801463A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1608366B1 (en) * | 1966-09-21 | 1971-05-06 | Sandvikens Jernverks Ab | USE OF A STEEL TO MANUFACTURE CORROSION-RESISTANT DIGER CUTTING TOOLS WITH HIGH EDGE HARDNESS LIKE RAZOR BLADES |
| DE1558649B2 (en) * | 1966-09-22 | 1971-07-15 | Sandvikens Jernverks Ab | USE OF CORROSION-RESISTANT STEEL TO MAKE RAZOR BLADES |
| DE1553806B1 (en) * | 1966-01-04 | 1971-12-09 | Sandvikens Jernverks Ab | USE OF A STEEL FOR RAZOR BLADES AND THEIR PRODUCTION |
| USRE29881E (en) * | 1971-06-23 | 1979-01-16 | C. I. Hayes Inc. | Method of vacuum carburizing |
-
1955
- 1955-08-09 GB GB22895/55A patent/GB801463A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1553806B1 (en) * | 1966-01-04 | 1971-12-09 | Sandvikens Jernverks Ab | USE OF A STEEL FOR RAZOR BLADES AND THEIR PRODUCTION |
| DE1608366B1 (en) * | 1966-09-21 | 1971-05-06 | Sandvikens Jernverks Ab | USE OF A STEEL TO MANUFACTURE CORROSION-RESISTANT DIGER CUTTING TOOLS WITH HIGH EDGE HARDNESS LIKE RAZOR BLADES |
| DE1558649B2 (en) * | 1966-09-22 | 1971-07-15 | Sandvikens Jernverks Ab | USE OF CORROSION-RESISTANT STEEL TO MAKE RAZOR BLADES |
| USRE29881E (en) * | 1971-06-23 | 1979-01-16 | C. I. Hayes Inc. | Method of vacuum carburizing |
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