US836754A - Process of improving the magnetic qualities of iron-silicon alloys. - Google Patents
Process of improving the magnetic qualities of iron-silicon alloys. Download PDFInfo
- Publication number
- US836754A US836754A US30314906A US1906303149A US836754A US 836754 A US836754 A US 836754A US 30314906 A US30314906 A US 30314906A US 1906303149 A US1906303149 A US 1906303149A US 836754 A US836754 A US 836754A
- Authority
- US
- United States
- Prior art keywords
- iron
- improving
- silicon alloys
- magnetic qualities
- alloy
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title description 8
- 230000008569 process Effects 0.000 title description 7
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 title description 3
- 229910000676 Si alloy Inorganic materials 0.000 title description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 229910001108 Charcoal iron Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1272—Final recrystallisation annealing
Definitions
- the alloy employed must be one low in carbon and manganese and having as its principal constituents iron, together. with from one to five per cent. of silicon or any element or elements equivalent to silicon in the same combination.
- the com 'osition and range of ingredients of such an al oy may be as follows: iron-silicon from one to five per cent., manganese up to five-tenths of one per cent., and carbon up to fifteen-hundredths of one per cent. I carry my process into effect byfirst heating said alloy to a temperature above a critical point (hereinafter defined) and then cooling said heated alloy slowly. A resulting product is obtained having greater permeabilit and a lower hysteresis quality than is exhibited by Specification of Letters Patent.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
Description
UNITED STATES PATENT OFFICE- ROBERT A. HADFIELD, OF SHEFFIELD, ENGLAND. PROCESS OF IMPROVING THE MAGNETIC QUALITIES 0F IRON-SILICON ALLOYS.
To all zuho1n it may concern:
Be it known that I, ROBERT A. HADFIELD, a subject of the King of Great Britain, residing at Parkhead, Sheffield, England, have invented a certain new, and useful Improvement in Processes for Im roving the Magnetic Qualities of Iron ilicon Alloys, of which the following is a specification.
In United States Letters Patent No.
745,829, granted to me December 1, 1903, I
have set forth a method of producing a magnetic material of high permeability and low,
The alloy employed must be one low in carbon and manganese and having as its principal constituents iron, together. with from one to five per cent. of silicon or any element or elements equivalent to silicon in the same combination. The com 'osition and range of ingredients of such an al oy may be as follows: iron-silicon from one to five per cent., manganese up to five-tenths of one per cent., and carbon up to fifteen-hundredths of one per cent. I carry my process into effect byfirst heating said alloy to a temperature above a critical point (hereinafter defined) and then cooling said heated alloy slowly. A resulting product is obtained having greater permeabilit and a lower hysteresis quality than is exhibited by Specification of Letters Patent.
Application filed February 27, 1906. Serial No. 303,149.
Patented Nov. 2'7, 1906.
the best commercial Swedish charcoal-iron. I
other point ensues at which another molecular change occurs. The term critical oint in the claims 'means the point of 'gher temperature of the two above-noted and corresponds and approximates to the 900 centigrade point in the case of pure iron, which is the lower limit of its so-called gamma state.
In practice I have satisfactorily performed my process by subjecting the said alloy to a temperature of 1,050 centigrade and then cooling it at the approximate rate of ten degrees per hour.
' I claim l. The process of increasing the permeability and reducing the hysteresis action of an alloy low in carbon and manganese and containin iron with from one to five per cent. of si icon, which consists in heating the said alloy to a temperature above its critical point and then subjecting it to cooling only.
2. The process of increasing'the permeability and reducing the hysteresis action of an alloy low in carbon and manganese and containing iron with from one to five per cent. of silicon, which consists in heating the said alloy to a tem erature' above its critical point and then Sub eoting it to slow cooling.
In testimony whereof I have affixed my signature in presence of two witnesses.
ROBERT A. HADFIELD. Witnesses G. H. HEMSOLL, E. RODGERS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30314906A US836754A (en) | 1906-02-27 | 1906-02-27 | Process of improving the magnetic qualities of iron-silicon alloys. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30314906A US836754A (en) | 1906-02-27 | 1906-02-27 | Process of improving the magnetic qualities of iron-silicon alloys. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US836754A true US836754A (en) | 1906-11-27 |
Family
ID=2905228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US30314906A Expired - Lifetime US836754A (en) | 1906-02-27 | 1906-02-27 | Process of improving the magnetic qualities of iron-silicon alloys. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US836754A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2530686A (en) * | 1941-07-24 | 1950-11-21 | Hartford Nat Bank & Trust Co | Current regulator tube |
| US7736444B1 (en) | 2006-04-19 | 2010-06-15 | Silicon Steel Technology, Inc. | Method and system for manufacturing electrical silicon steel |
-
1906
- 1906-02-27 US US30314906A patent/US836754A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2530686A (en) * | 1941-07-24 | 1950-11-21 | Hartford Nat Bank & Trust Co | Current regulator tube |
| US7736444B1 (en) | 2006-04-19 | 2010-06-15 | Silicon Steel Technology, Inc. | Method and system for manufacturing electrical silicon steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US836754A (en) | Process of improving the magnetic qualities of iron-silicon alloys. | |
| US2747989A (en) | Ferritic alloys | |
| US2527287A (en) | Hardening of austenitic chromiumnickel steels by working at subzero temperatures | |
| GB338409A (en) | Improved manufacture of iron and iron-nickel and iron-silicon alloys | |
| US2809888A (en) | Cast iron with high creep resistance and method for making same | |
| US1873155A (en) | Ferromagnetic materials | |
| US745829A (en) | Magnetic composition and method of making same. | |
| US896705A (en) | Process for hardening tantalum. | |
| US1304224A (en) | Louis fenn vogt | |
| US3135600A (en) | Alloy steels | |
| US836755A (en) | Process of improving certain magnetic qualities of a magnetic body. | |
| US1131361A (en) | Process of making granular nitrate of ammonia. | |
| US2443932A (en) | Welded steel articles and method for making same | |
| US836757A (en) | Process of improving the magnetic qualities of iron-silicon-manganese alloys. | |
| US1261742A (en) | Alloy. | |
| US1890013A (en) | Lead alloy | |
| USRE12691E (en) | Robert abbott hadfield | |
| US836762A (en) | Process of improving the magnetic qualities of iron-silicon-aluminium alloys. | |
| US1086766A (en) | Process for improving the magnetic qualities of iron-silicon-manganese-aluminium alloys. | |
| US836759A (en) | Method of making magnetic materials. | |
| US1928382A (en) | Permanent magnet | |
| US1550489A (en) | Heat-treated zirconium steel and process of making same | |
| US1122385A (en) | Process for improving the magnetic qualities of a magnetic body. | |
| US3726669A (en) | Elimination of lead embrittlement in steel | |
| US2310666A (en) | Malleable cast iron |