US1728909A - Method of making tools from hard-metal alloys produced by sintering - Google Patents
Method of making tools from hard-metal alloys produced by sintering Download PDFInfo
- Publication number
- US1728909A US1728909A US124547A US12454726A US1728909A US 1728909 A US1728909 A US 1728909A US 124547 A US124547 A US 124547A US 12454726 A US12454726 A US 12454726A US 1728909 A US1728909 A US 1728909A
- Authority
- US
- United States
- Prior art keywords
- sintering
- tools
- metal alloys
- degrees
- hard
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S76/00—Metal tools and implements, making
- Y10S76/11—Tungsten and tungsten carbide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/27—Cutters, for shaping comprising tool of specific chemical composition
Definitions
- This invention relates to tools consisting of hard metal alloys produced by sintering and has for its object to simplify and improve the manufacture of such tools.
- the invention provides the following method.
- the preliminarily sintered bodies are thereupon brought into a shape corresponding as much as possible to the desired final shape of said tools by work- 'ing them with reducing tools such as files, emery stones or the like. It is possible to carry out this treatment without any considerable difliculties since the bodies possess only a low strength in the said preliminarily sintered condition.
- the bodies In succession to this treatment, the bodies have imparted to them the highest possible hardness by sintering at higher temperatures. This sintering ata i h temperature likewise governs itself by t e contents of softer additional metals. It lies as a rule between 1300 and 1600 degrees C.
- the method of making tools from hard metal alloys which consists in forming solid bodies from a mixture of very hard metal carbide powders having a melting point above 2000 C. and soft metal powders by the application of pressure, sintering these solid bodies at a temperature from 700 to 1100 degrees C., bringing them into a shape approximating the desired final shape of said tools by working them with reducing tools, and thereupon subjecting them to a sintering at a temperature higher than 1100 degrees C.
- the method of making tools from hard metal alloys which consists in forming solid bodies from a mixture of very hard metal carbide powders having a melting point above 2000 C. and soft metal powders by the applieation of pressure, sintering these solid bodies at a temperature from 700 to 1100 degrees 0., bringing them into a shape approximating the desired final shape of said tools by working them with reducin tools, sintering them at a temperature hi er than 1100 degrees (1, and thereupon suluecting them to a finishing treatment for smoothing them.
- the method of making tools from hard metal alloys which consists in forming solid bodies from a mixture of very hard metal carbide powders having a melting point above 2000 C. and soft metal powders by the application of pressure, sintering these solid bodies at a temperature of about 900 degrees C., bringing them into a shape approximating the desired final shape of said tools by workingfhem with reducing tools and thereupon su jecting them to a sintering at a temperature higher than 1100 degrees C.
- the method of making tools from hard metal alloys which consists in forming solid bodies from a mixture of tungsten carbide powder and powders of one or more metals of the iron group, by the application of pressure, sintermg these solid bodies at a temperature from 700 to 1100 degrees (3., bringing them into a shape approxlmating the desired final shape of sald tools Ly working them with reducing tools, and thereupon subje'cting them to a sinterin at a temperature higher than 1100 degrees
- the foregoin specification si ned at Berlin, Germany, t 's second day 0 July, 1926.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Description
Patented Sept. 17, 1929 UNHTEB STATES PATENT @FFHQE KARL SCI-IROTER, OF BERLIN-LICHTENBERG, GERMANY, ASSIGTIOR, BY MESNE AS- SIGNMENTS, TO GENERAL ELECTRIC COMPANY, OF SCHENECTADY, NEW YORK, A.
CORPORATION OF NEW YORK METHOD OF MAKING TOOLS FROM HARD-METAL ALLOYS PRODUCED BY SINTERING No Drawing. Application filed July 23, 1926, Serial No. 124,547, and in Germany'December 12, 1925.
, This invention relates to tools consisting of hard metal alloys produced by sintering and has for its object to simplify and improve the manufacture of such tools.
As a matter of fact, in most cases one does not succeed in bringing such tools into the desired final shape by pressing and sintering alone. Reducing operations, such as filing, grinding, or the like, are usually necessary,
this being difficult owing to the hardness of the tools and entailing besides a wear of the working tools whereby the costs of manufacture are very much increased.
In order to obtain the final shape of the tool more easily, the invention provides the following method.
At first, there are made by the application of pressure from a mixture of hard metal carbide powders having a melting point above 2000 (3., such as tungsten carbide, and softer powders, such as cobalt, nickel or iron, solid bodies of a shape corresponding approximately to the desired final shape of said tools. These solid bodies are then submitted to a preliminary sintering at a tem erature of about 7 00 to 1100 degrees C. whic depends on the contents of softer additional metal owders. With an addition of 5 per cent of co alt to a tungsten monocarbide, it has for instance proved to be advantageous to maintain the temperature at about 900 degrees C. during the preliminary sintering. The preliminarily sintered bodies are thereupon brought into a shape corresponding as much as possible to the desired final shape of said tools by work- 'ing them with reducing tools such as files, emery stones or the like. It is possible to carry out this treatment without any considerable difliculties since the bodies possess only a low strength in the said preliminarily sintered condition. In succession to this treatment, the bodies have imparted to them the highest possible hardness by sintering at higher temperatures. This sintering ata i h temperature likewise governs itself by t e contents of softer additional metals. It lies as a rule between 1300 and 1600 degrees C.,
preferably at about 1400 degrees C. In case it is not possible to give the bodies the desired final shape already by the treatment carried out between the two heating stages, there is still executed after the sintering at high temperature a finishing treatment designed to remove from thebodies any small projections, burrs or the like still existing on them.
Claims:
1. The method of making tools from hard metal alloys which consists in forming solid bodies from a mixture of very hard metal carbide powders having a melting point above 2000 C. and soft metal powders by the application of pressure, sintering these solid bodies at a temperature from 700 to 1100 degrees C., bringing them into a shape approximating the desired final shape of said tools by working them with reducing tools, and thereupon subjecting them to a sintering at a temperature higher than 1100 degrees C.
2. The method of making tools from hard metal alloys which consists in forming solid bodies from a mixture of very hard metal carbide powders having a melting point above 2000 C. and soft metal powders by the applieation of pressure, sintering these solid bodies at a temperature from 700 to 1100 degrees 0., bringing them into a shape approximating the desired final shape of said tools by working them with reducin tools, sintering them at a temperature hi er than 1100 degrees (1, and thereupon suluecting them to a finishing treatment for smoothing them.
3. The method of making tools from hard metal alloys which consists in forming solid bodies from a mixture of very hard metal carbide powders having a melting point above 2000 C. and soft metal powders by the application of pressure, sintering these solid bodies at a temperature of about 900 degrees C., bringing them into a shape approximating the desired final shape of said tools by workingfhem with reducing tools and thereupon su jecting them to a sintering at a temperature higher than 1100 degrees C.
4. The method of making tools from hard metal alloys which consists in forming, solid bodies from a mixture of tungsten carbide powder and softer metal powders by the application of pressure, sintering these sohd bodies at a temperature from 700 to 1100 degrees 0., bringing them into a shape approximating the desired final shape of said tools by working them with reducing tools, and thereupon subjecting them to a slntering at a temperature hlgher than 1100 degrees C.
5. The method of making tools .from hard metal alloys which consists in forming solid bodies from a mixture of tungsten carbide powder and cobalt powder by the application of pressure, sintering these solid bodies at a. temperature of 900 degrees 0., bringing'them into a shape approximating the desired final shape of said tools by working them with reducing tools, and thereupon subjecting them to a sintering at a temperature higher than 1100 degrees C. I
6. The method of making tools from hard metal alloys which consists in forming solid bodies from a mixture of tungsten carbide powder and powders of one or more metals of the iron group, by the application of pressure, sintermg these solid bodies at a temperature from 700 to 1100 degrees (3., bringing them into a shape approxlmating the desired final shape of sald tools Ly working them with reducing tools, and thereupon subje'cting them to a sinterin at a temperature higher than 1100 degrees The foregoin specification si ned at Berlin, Germany, t 's second day 0 July, 1926.
KARL SCHRGTER.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1728909X | 1925-12-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1728909A true US1728909A (en) | 1929-09-17 |
Family
ID=7740903
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US124547A Expired - Lifetime US1728909A (en) | 1925-12-12 | 1926-07-23 | Method of making tools from hard-metal alloys produced by sintering |
Country Status (1)
Country | Link |
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US (1) | US1728909A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2736086A (en) * | 1956-02-28 | Corrosion-resistant cemented titanium | ||
US2753621A (en) * | 1953-02-11 | 1956-07-10 | Firth Sterling Inc | Sintered carbide compositions and method of making the same |
US2755184A (en) * | 1952-05-06 | 1956-07-17 | Thompson Prod Inc | Method of making ni3al |
US2789073A (en) * | 1953-08-24 | 1957-04-16 | Melvin F Kesting | Method of heat treatment of carbide tips for tools to increase their working life |
US2789901A (en) * | 1952-05-27 | 1957-04-23 | Gen Motors Corp | Method of making high density sintered parts |
US2798474A (en) * | 1951-09-18 | 1957-07-09 | Deutsche Edelstahlwerke Ag | Hard-metal containing mixtures and processes of applying them to supporting bodies and supporting bodies so treated |
US6238148B1 (en) * | 1996-08-08 | 2001-05-29 | Mitsubishi Materials Corporation | Cemented carbide cutting tool |
US20050025657A1 (en) * | 2003-07-25 | 2005-02-03 | Sandvik Ab | Method of making a fine grained cemented carbide |
-
1926
- 1926-07-23 US US124547A patent/US1728909A/en not_active Expired - Lifetime
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2736086A (en) * | 1956-02-28 | Corrosion-resistant cemented titanium | ||
US2798474A (en) * | 1951-09-18 | 1957-07-09 | Deutsche Edelstahlwerke Ag | Hard-metal containing mixtures and processes of applying them to supporting bodies and supporting bodies so treated |
US2755184A (en) * | 1952-05-06 | 1956-07-17 | Thompson Prod Inc | Method of making ni3al |
US2789901A (en) * | 1952-05-27 | 1957-04-23 | Gen Motors Corp | Method of making high density sintered parts |
US2753621A (en) * | 1953-02-11 | 1956-07-10 | Firth Sterling Inc | Sintered carbide compositions and method of making the same |
US2789073A (en) * | 1953-08-24 | 1957-04-16 | Melvin F Kesting | Method of heat treatment of carbide tips for tools to increase their working life |
US6238148B1 (en) * | 1996-08-08 | 2001-05-29 | Mitsubishi Materials Corporation | Cemented carbide cutting tool |
US20050025657A1 (en) * | 2003-07-25 | 2005-02-03 | Sandvik Ab | Method of making a fine grained cemented carbide |
US20060029511A1 (en) * | 2003-07-25 | 2006-02-09 | Sandvik Ab | Method of making a fine grained cemented carbide |
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