GB748594A - Improvements in and relating to steel - Google Patents
Improvements in and relating to steelInfo
- Publication number
- GB748594A GB748594A GB601152A GB601152A GB748594A GB 748594 A GB748594 A GB 748594A GB 601152 A GB601152 A GB 601152A GB 601152 A GB601152 A GB 601152A GB 748594 A GB748594 A GB 748594A
- Authority
- GB
- United Kingdom
- Prior art keywords
- steel
- under
- mercury
- days
- stand
- 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
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Steel of an ultimate tensile strength of 80 tons per square inch after heat treatment is obtained in a batch process by subjecting the steel to a vacuum treatment while in the molten state. The vacuum treatment may be applied during manufacture of the steel before or after the addition of alloying elements and under such conditions that contamination of the metal before casting is prevented. Steel ingots may be remelted under a low pressure, e.g. 5-10 cms. of mercury, of hydrogen, held under a vacuum of 0,0.5 m.m. of mercury for 1 hour after which the pressure may be slowly raised and the metal cast. The finished steel may be rolled into bars and heat treated, e.g. for En 31 steel as follows: quench from 850 DEG C. into oil at 50-60 DEG C., allow to stand for two days, immerse in solid carbon monoxide for 15 minutes, allow to stand for two days, temper at 250 DEG C. for 1 hour and cool in air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB601152A GB748594A (en) | 1952-03-07 | 1952-03-07 | Improvements in and relating to steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB601152A GB748594A (en) | 1952-03-07 | 1952-03-07 | Improvements in and relating to steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB748594A true GB748594A (en) | 1956-05-09 |
Family
ID=9806803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB601152A Expired GB748594A (en) | 1952-03-07 | 1952-03-07 | Improvements in and relating to steel |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB748594A (en) |
-
1952
- 1952-03-07 GB GB601152A patent/GB748594A/en not_active Expired
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