GB686790A - Blast-refined steel with low carbon content and method for producing same - Google Patents
Blast-refined steel with low carbon content and method for producing sameInfo
- Publication number
- GB686790A GB686790A GB12353/50A GB1235350A GB686790A GB 686790 A GB686790 A GB 686790A GB 12353/50 A GB12353/50 A GB 12353/50A GB 1235350 A GB1235350 A GB 1235350A GB 686790 A GB686790 A GB 686790A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphorus
- per cent
- nitrogen
- reducing agent
- carbon
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract 4
- 229910000831 Steel Inorganic materials 0.000 title abstract 4
- 229910052799 carbon Inorganic materials 0.000 title abstract 4
- 239000010959 steel Substances 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 title 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract 7
- 229910052698 phosphorus Inorganic materials 0.000 abstract 7
- 239000011574 phosphorus Substances 0.000 abstract 7
- 229910052757 nitrogen Inorganic materials 0.000 abstract 5
- 239000003638 chemical reducing agent Substances 0.000 abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 2
- 238000007664 blowing Methods 0.000 abstract 2
- 239000000155 melt Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 229910052760 oxygen Inorganic materials 0.000 abstract 2
- 239000001301 oxygen Substances 0.000 abstract 2
- 238000007670 refining Methods 0.000 abstract 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 1
- 229910000676 Si alloy Inorganic materials 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 239000004571 lime Substances 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
Abstract
In a method of refining steel having a carbon content below 0.015 per cent, an oxygen-containing gas free from carbon is blown on to or through the melt in the presence of a reducing agent having a higher affinity for oxygen than has iron, at least one of the elements nitrogen or phosphorus being present in the melt or added during the blowing. The reducing agent may be silicon or a silicon alloy in amount which, during refining, does not exceed 0.5 per cent, or phosphorus in the presence of lime. The amount of phosphorus should be such that the carbon is reduced to 0.04 per cent before the phosphorus has fallen below 1.5 per cent. Ferrophosphorus may be added. The finished steel may have 0.006-0.150 per cent phosphorus, or 0.010-0.030 per cent nitrogen and if both nitrogen and phosphorus are present the sum of the phosphorus content plus 10 times the nitrogen content may be between 0.15 and 0.30 per cent. The reducing agent may be added in portions during the blowing and the final part of the blow may be nitrogen alone. Steels made by the process are stated to give good impact values at low temperatures, e.g. 14-15 kilogram-meters at minus 60 DEG C in the normalized, strained and aged condition.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE686790X | 1950-04-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB686790A true GB686790A (en) | 1953-01-28 |
Family
ID=20315072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12353/50A Expired GB686790A (en) | 1950-04-05 | 1950-05-17 | Blast-refined steel with low carbon content and method for producing same |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB686790A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6565676B2 (en) * | 1998-02-06 | 2003-05-20 | Akira Makita | Material for a stretched mask for color picture tube |
-
1950
- 1950-05-17 GB GB12353/50A patent/GB686790A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6565676B2 (en) * | 1998-02-06 | 2003-05-20 | Akira Makita | Material for a stretched mask for color picture tube |
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