JPS552759A - Manufacture of ultra-low-carbon stainless steel - Google Patents
Manufacture of ultra-low-carbon stainless steelInfo
- Publication number
- JPS552759A JPS552759A JP7543278A JP7543278A JPS552759A JP S552759 A JPS552759 A JP S552759A JP 7543278 A JP7543278 A JP 7543278A JP 7543278 A JP7543278 A JP 7543278A JP S552759 A JPS552759 A JP S552759A
- Authority
- JP
- Japan
- Prior art keywords
- inert gas
- low
- stainless steel
- runs
- molten
- 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.)
- Pending
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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/068—Decarburising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
PURPOSE:To stably manufacture the ultra-low-carbon stainless steel, by feeding the inert gas against the molten low carbon steel obtained in the vacuum refining furnace under the condition of the reduced pressure and the existence of the slag, and by feeding oxygen or inert gas through the immersed runs. CONSTITUTION:The molten stainless steel, being roughly refined by decarburization so as to include about 0.3% C, is poured into the ladle 1 which is then placed within the vacuum vessel 4. The inside of the vessel 4 is evacuated, and the inert gas is introduced through the porous plug 3 for stirring the molten steel; at the same time, the pure oxygen is introduced through the runs 5 so as to blow the oxygen against the upper zone of the molten steel to be refined; hereby, the carbon content is reduced to 0.01-0.02% C. Next, while the reduced pressure is being kept as it is, and the existence of the slag 6 at least 2.5kg per ton of molten steel is permitted, the inert gas is introduced through the porous plug 3; at the same time, the runs 5 is immersed into the molten steel, and the oxygen or inert gas is blown through the runs 5. According to this method, the ultra-low-carbon stainless steel with the carbon content reduced to about C<0.005% can be manufactured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7543278A JPS552759A (en) | 1978-06-23 | 1978-06-23 | Manufacture of ultra-low-carbon stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7543278A JPS552759A (en) | 1978-06-23 | 1978-06-23 | Manufacture of ultra-low-carbon stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS552759A true JPS552759A (en) | 1980-01-10 |
Family
ID=13576046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7543278A Pending JPS552759A (en) | 1978-06-23 | 1978-06-23 | Manufacture of ultra-low-carbon stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS552759A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61119612A (en) * | 1984-11-14 | 1986-06-06 | Sumitomo Metal Ind Ltd | Method for simultaneously removing copper and tin from molten iron |
| JPH03281718A (en) * | 1990-03-29 | 1991-12-12 | Nippon Steel Corp | Manufacturing method of ultra-low carbon steel |
-
1978
- 1978-06-23 JP JP7543278A patent/JPS552759A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61119612A (en) * | 1984-11-14 | 1986-06-06 | Sumitomo Metal Ind Ltd | Method for simultaneously removing copper and tin from molten iron |
| JPH0448843B2 (en) * | 1984-11-14 | 1992-08-07 | Sumitomo Metal Ind | |
| JPH03281718A (en) * | 1990-03-29 | 1991-12-12 | Nippon Steel Corp | Manufacturing method of ultra-low carbon steel |
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