Titanium carbide-tungsten carbide composite hard alloy

A technology of tungsten carbide alloy and titanium carbide alloy, which is applied in the field of cemented carbide, can solve the problems of small grain length, poor wettability of binder phase, and restricted development, and achieve low cost, poor wettability, and reduced The effect of preparation costs

Active Publication Date: 2015-02-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, although TiC cemented carbide has the advantages of high hardness, high melting point, low density, thermal stability, and small grain length tendency during sintering, it is limited by the poor wettability of the binder phase. its development

Method used

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  • Titanium carbide-tungsten carbide composite hard alloy
  • Titanium carbide-tungsten carbide composite hard alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] First, pre-screened TiC powder with a uniform particle size of about 1-3 μm and WC powder with a particle size of about 5-8 μm are prepared according to the mass fraction of 1:9, and the binder Fe 3 Al and Mo are prepared according to 5.5% and 1% of the cemented carbide mass fraction, among which Fe 3 The composition of Al alloy is (accounting for Fe 3 Al alloy (mass percentage): Al17%; Cr1.3%; Nb2.0%; Zr0.3%; B0.2%; Ce0.2%; Fe79%. And add additive stearic acid ingredients with a total mass fraction of 1%, mix and grind in a ball mill for 48 hours; vacuum-dry the mixed and ground raw materials to remove agglomerates, and then granulate to prepare a mixture After passing the appraisal, at 1000kg / cm 2 Precise pressing under high pressure to make high-precision compacts; place the prepared high-precision compacts in a vacuum sintering furnace, and press the compacts at a vacuum degree of 5×10 -4 In an atmosphere of MPa, it is heated to 1400°C for sintering for 1 hour, f...

Embodiment 2

[0036] Firstly, the pre-screened TiC powder with a uniform particle size of about 1-3 μm and the WC powder with a particle size of about 5-8 μm are mixed according to the mass fraction of 3:7, and the binder Fe 3 Al and Mo are prepared according to 9.3% and 0.7% of the cemented carbide mass fraction, of which Fe 3 The composition of Al alloy is (accounting for Fe 3 Al alloy (mass percentage): Al19.2%; Cr1.6%; Nb2.4%; Zr0.5%; B0.1%; Ce0.5%; Fe75.7%. And add 0.5% of the total mass fraction of the additive stearic acid ingredients, mix and grind in a ball mill for 48 hours; the mixed and ground raw materials are vacuum-dried and sieved to remove agglomerates, and then granulated to be made into a mixture After passing the appraisal, at 1000kg / cm 2 Precise pressing under high pressure to make high-precision compacts; place the prepared high-precision compacts in a vacuum sintering furnace, and press the compacts at a vacuum degree of 5×10 -4 In an atmosphere of MPa, it is heate...

Embodiment 3

[0038]First, the TiC powder with a uniform particle size of about 1-3 μm and the WC powder with a particle size of about 5-8 μm, which have been screened in advance, are mixed according to the mass fraction of 1:1, and the binder Fe 3 Al and Mo are prepared according to the cemented carbide mass fraction of 15% and 0.5%, among which Fe 3 The composition of Al alloy is (accounting for Fe 3 Al alloy (mass percentage): Al20%; Cr1.9%; Nb2.1%; Zr0.4%; B0.3%; Ce0.3%; Fe75%. And add 0.8% of the total mass fraction of the additive stearic acid ingredients, mix and grind in a ball mill for 48 hours; sieve the mixed and ground raw materials to remove agglomerates after vacuum drying, and then granulate, to be made into a mixture After passing the appraisal, at 1000kg / cm 2 Precise pressing under high pressure to make high-precision compacts; place the prepared high-precision compacts in a vacuum sintering furnace, and press the compacts at a vacuum degree of 5×10 -4 In an atmosphere o...

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Abstract

The invention discloses a titanium carbide-tungsten carbide composite hard-phase hard alloy. The hard alloy contains a hard-phase titanium carbide-tungsten carbide alloy mixture, an Fe3Al alloy used as a binding phase and Mo, wherein the tungsten carbide alloy accounts for 50-90% by mass percentage of the hard alloy, and is 5-8 microns in granularity; the titanium carbide accounts for 10-50% by mass percentage of the hard alloy, and is 1-3 microns in granularity; the Fe3Al accounts for 5.5-15% by mass percentage of the hard alloy; and the metal Mo accounts for 0.5-1% by mass percentage of the hard alloy. According to the titanium carbide-tungsten carbide composite hard-phase hard alloy disclosed by the invention, the binding phase and the hard phase have an excellent wetting performance, and the prepared hard alloy can provide a structural part which is high in strength, high in density, excellent in corrosion resistance, wearing resistance and other comprehensive performances, and can be mechanically processed, heat-treated and welded; and furthermore, the hard alloy can reduce the preparation cost of like hard alloys.

Description

technical field [0001] The invention belongs to the field of cemented carbide and relates to a composite hard phase cemented carbide. Background technique [0002] Wear is one of the causes of material failure. According to relevant statistics, more than 70% of equipment damage and material failure are caused by wear, and the direct and indirect losses caused by wear all over the world reach hundreds of billions of yuan every year. Therefore, structural components with good comprehensive properties such as high strength, high density, corrosion resistance, and wear resistance have become an urgent need. [0003] Among the four types of wear-resistant materials such as heat-treated steel, austenitic steel, high-chromium iron steel and cemented carbide, cemented carbide has the best wear resistance, especially WC-Co cemented carbide with high wear resistance. Abrasiveness and good toughness have been widely used in cutting tools, wear-resistant parts, mining and road constru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/06C22C38/32
Inventor 薛烽周健巨佳白晶孙扬善
Owner SOUTHEAST UNIV
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