 Magnetic recording medium |
| OF THE INVENTION The magnetic recording medium of the present invention comprises, as shown in FIG.... |
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| Coated tool steel and machining tool formed therefrom |
| What is claimed is: 1. A coated tool steel comprising a tool steel substrate and at least one layer ... |
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| Surface-coated cemented carbide article or part |
| OF THE INVENTION We, the inventors, have made various efforts to obtain a surface-coated cemented ... |
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| Magnetic recording medium and method for preparing the same |
| OF THE INVENTION A magnetic recording medium comprising a non-magnetic support having provided on ... |
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| Electrophotographic imaging process |
| Accordingly, it is an object of the invention to provide an electrophotographic process which ... |
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| Shadow mask |
| This invention has been accomplished to cope with the above problems. Accordingly, an object of ... |
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| Solid state current limit circuit |
| It is an object of this invention to provide an improved current limit circuit. Another object of ... |
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| Control circuitry for a pulse-width-modulated switching power supply |
| It is an object of the present invention to provide inexpensive and improved control circuitry for P... |
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| Power transistor thermal shutdown circuit |
| I claim: 1. In a power transistor having base, emitter and collector electrodes along with a ... |
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Wear resistant compound material, method for manufacturing it and use of such compound material
| Details |
Inventors: Jachowski, Johannes; Mohs, Rudolf;
Assignee: Fried. Krupp Gesellschaft mit beschrankter Haftung (Essen, DE)
Primary Examiner: Hunt; Brooks H.
Assistant Examiner:
Attorney, Agent or Firm: Spencer & Kaye
A compound substance of great hardness and toughness, comprising a metal matrix, having embedded therein, hard material granules of a size of 0.1 to 5 mm. The metal matrix comprises 1 to 4% carbon, 0.3 to 0.6% silicon, 0.5 to 1.5% manganese, 0.8 to 2.8% vanadium, 0.5 to 1.5% chromium, 2 to 10% tungsten, about 0.01% aluminum and the remainder, iron. |
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DETAILED DESCRIPTION It is an object of the present invention to provide a wear-resistant compound substance containing a hard material in granular form embedded in a metal matrix.
It is a further object of the present invention to provide a compound substance of greater hardness and toughness, and resistance to abrasive wear, compared with prior art substances.
In view of these objects and in accordance with its purpose, the present invention provides a wear resistant compound substance and methods for its manufacture, the substance comprising a sintered or cast metal matrix including by weight, 1 to 4% carbon, 0.
3 to 0.
6% silicon, 0.
5 to 1.
5% manganese, 0.
8 to 2.
8% vanadium, 0.
5 to 1.
5% chromium, 2 to 10% tungsten, about 0.
01% aluminum, and the remainder iron, and, embedded in the metal matrix, a hard material in granular form, the hard material having a grain size of 0.
1 to 5 mm.
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