GB1492953A - Leaded steel bar - Google Patents
Leaded steel barInfo
- Publication number
- GB1492953A GB1492953A GB9830/75A GB983075A GB1492953A GB 1492953 A GB1492953 A GB 1492953A GB 9830/75 A GB9830/75 A GB 9830/75A GB 983075 A GB983075 A GB 983075A GB 1492953 A GB1492953 A GB 1492953A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lead
- steel
- inclusions
- melt
- ladle
- 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
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
-
- 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
- C21C7/0006—Adding metallic additives
- C21C2007/0012—Lead
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
1492953 Free machining steel INLAND STEEL CO and ECHEVARRIA SA 10 March 1975 [14 Aug 1974] 9830/75 Heading C7A, D An as rolled free machining steel bar contains micro-inclusions of lead (invisible below x 10 magnification) in machinability increasing amounts (e.g. 0À05 to 0À7 wt. per cent) and having no substantial amount of macro-inclusions of manganese, silicon and iron in the immediate sub-surface region i.e. 5-15% of the depth to the centre of the bar. The steel may be prepared by adding lead to a steel melt in a closed ladle in the presence of an atmosphere above the melt less oxidizing than the atmosphere outside the ladle said atmosphere being provided by inert gas (e.g. argon) which is injected to stir the melt during the lead adding step and which is removed from the ladle during the lead adding step, the lead containing melt being ingot or strand cast and hot-rolled. The free machining steel may be of composition:- C 0À03-1À03 Mn 0À25-1À65 S 0À01-0À5 P 0À005-0À2 Si 0À01-1 N 2 0-0À3 Cr 0 or 0À01 to 1À7 Ni 0 or 0À01 to 3À75 Mo 0 or 0À01 to 0À5 V 0-0À25 B 0-0À003 Ti 0-0À5 Zr 0-0À25 Nb 0-0À25 Al 0 or 0À005 to 0À1 Ca 0 or 0À001 to 0À02 Te 0 to 0À15 Pb 0À05 to 0À07 Fe Balance The lead micro-inclusions may comprise tellurium and may be associated with manganese sulphide inclusions.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US49725874A | 1974-08-14 | 1974-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1492953A true GB1492953A (en) | 1977-11-23 |
Family
ID=23976097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9830/75A Expired GB1492953A (en) | 1974-08-14 | 1975-03-10 | Leaded steel bar |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5142011A (en) |
| AT (1) | ATA304875A (en) |
| BE (1) | BE824838A (en) |
| BR (1) | BR7501300A (en) |
| CA (1) | CA1045856A (en) |
| DE (1) | DE2508007A1 (en) |
| ES (1) | ES440156A2 (en) |
| FR (1) | FR2281988A2 (en) |
| GB (1) | GB1492953A (en) |
| IT (1) | IT1030150B (en) |
| LU (1) | LU71738A1 (en) |
| SE (1) | SE7509134L (en) |
| ZA (1) | ZA75241B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0027165A1 (en) * | 1979-08-29 | 1981-04-22 | Inland Steel Company | Free machining steel with bismuth |
| GB2191506A (en) * | 1986-06-10 | 1987-12-16 | Stanadyne Inc | Resulfurized and rephosphorized steel bars |
| EP1541699A1 (en) * | 2002-04-03 | 2005-06-15 | Techcom Import-Export Gmbh | Method for feeling steel |
| CN110117693A (en) * | 2019-04-09 | 2019-08-13 | 上海大学 | The tellurium adding technology method of the automatic steel containing tellurium |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735321Y2 (en) * | 1978-08-21 | 1982-08-04 | ||
| JPS55115850U (en) * | 1979-02-13 | 1980-08-15 | ||
| DE2967319D1 (en) * | 1979-06-08 | 1985-01-17 | Henrik Giflo | High-strength freely machinable steel capable of sustaining dynamic forces |
| US4265660A (en) | 1979-07-03 | 1981-05-05 | Henrik Giflo | High-strength free-cutting steel able to support dynamic stresses |
| JPS58190304A (en) * | 1982-05-01 | 1983-11-07 | 株式会社スズテック | Rice planting method and apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE757558A (en) * | 1969-10-15 | 1971-03-16 | British Steel Corp | ALLOY STEELS |
| US3671224A (en) * | 1970-08-17 | 1972-06-20 | Republic Steel Corp | Methods of producing leaded steel |
-
1975
- 1975-01-14 ZA ZA00750241A patent/ZA75241B/en unknown
- 1975-01-27 BE BE152758A patent/BE824838A/en unknown
- 1975-01-28 LU LU71738A patent/LU71738A1/xx unknown
- 1975-02-14 IT IT67392/75A patent/IT1030150B/en active
- 1975-02-25 DE DE19752508007 patent/DE2508007A1/en active Pending
- 1975-03-05 BR BR1684/75A patent/BR7501300A/en unknown
- 1975-03-10 GB GB9830/75A patent/GB1492953A/en not_active Expired
- 1975-04-01 FR FR7510127A patent/FR2281988A2/en active Granted
- 1975-04-02 CA CA223,685A patent/CA1045856A/en not_active Expired
- 1975-04-21 AT AT304875A patent/ATA304875A/en not_active Application Discontinuation
- 1975-07-02 JP JP50081028A patent/JPS5142011A/en active Pending
- 1975-08-14 SE SE7509134A patent/SE7509134L/en unknown
- 1975-09-09 ES ES440156A patent/ES440156A2/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0027165A1 (en) * | 1979-08-29 | 1981-04-22 | Inland Steel Company | Free machining steel with bismuth |
| GB2191506A (en) * | 1986-06-10 | 1987-12-16 | Stanadyne Inc | Resulfurized and rephosphorized steel bars |
| GB2191506B (en) * | 1986-06-10 | 1990-01-04 | Stanadyne Inc | Cold drawn free-machining resulfurized and rephosphorized steel bars having controlled mechanical properties and controlled machinability |
| EP1541699A1 (en) * | 2002-04-03 | 2005-06-15 | Techcom Import-Export Gmbh | Method for feeling steel |
| EP1541699A4 (en) * | 2002-04-03 | 2005-09-21 | Techcom Imp Exp Gmbh | Method for feeling steel |
| CN110117693A (en) * | 2019-04-09 | 2019-08-13 | 上海大学 | The tellurium adding technology method of the automatic steel containing tellurium |
Also Published As
| Publication number | Publication date |
|---|---|
| BR7501300A (en) | 1976-08-03 |
| ES440156A2 (en) | 1977-07-16 |
| ZA75241B (en) | 1976-01-28 |
| FR2281988B2 (en) | 1978-04-21 |
| SE7509134L (en) | 1976-02-16 |
| LU71738A1 (en) | 1975-06-24 |
| BE824838A (en) | 1975-05-15 |
| ATA304875A (en) | 1978-02-15 |
| AU7744675A (en) | 1976-07-22 |
| JPS5142011A (en) | 1976-04-09 |
| FR2281988A2 (en) | 1976-03-12 |
| CA1045856A (en) | 1979-01-09 |
| DE2508007A1 (en) | 1976-03-04 |
| IT1030150B (en) | 1979-03-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |