A kind of cemented carbide strengthened by heat treatment of binder phase and preparation method thereof

A technology of cemented carbide and binder phase, which is applied in the field of cemented carbide material manufacturing, can solve the problems of prolonging the production process of cemented carbide, difficulty in large-scale production, cost-effectiveness of large-scale production, and difficult dispersion of additives, so as to avoid the decrease of alloy toughness and size Effect of fineness, reinforcement effect improvement

Active Publication Date: 2017-02-15
XIAMEN TUNGSTEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also has the problem of difficult dispersion of additives, and the production process of cemented carbide is greatly extended, making it difficult to produce cost-effective cemented carbide products on a large scale

Method used

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Embodiment

[0032] A cemented carbide strengthened by heat treatment of the binder phase of the present invention and its preparation method are based on elements such as Co, Ni, Fe as the main raw materials of the cemented carbide binder phase in the present invention, and adding Cr, Mo, W, Ti, etc. Metal powder, the cemented carbide binder phase is prepared by mechanical alloying or chemical synthesis.

[0033] Carbide hard phases such as iron group elements Co, Ni, Fe and WC have good wettability and bonding strength, and have always been the main components of the cemented carbide bonding phase. The cemented carbide binder phase of the present invention may contain Co, Ni and Fe in any proportion. On this basis, Cr, Mo, W, V, Ta, Nb, Ti, Al, Mn, Cu, Si, B and other elements are added to form the binder phase of cemented carbide.

[0034] In the binder phase system composed of Co, Ni and Fe, the same additive element can play a role of solid solution strengthening and aging strengthen...

Embodiment 1

[0049] A new cemented carbide binder phase was configured with mass fractions of 36.2% Co, 24.5% Ni, 10.5% Fe, 21.0% Cr, 5.0% Mo, 1.0% Ti, 0.8% Nb, 0.8% W, and 0.2% Al ; Among them, the total mass of Co, Ni and Fe accounts for 71.2% of the binder phase. All raw materials are metal elemental powder with a particle size of 150-350 mesh. Add cemented carbide balls according to the ball-to-material ratio of 10:1, place them in a planetary ball mill tank with cemented carbide lining, add anti-oxidant media and ball mill in Ar atmosphere 40h to prepare prefabricated binder phase particles. Mix WC with an average grain size of 2.5 μm and binder phase particles according to the mass ratio of 9:1, and use traditional alcohol wet grinding method to mix according to the ball-to-material ratio of 3.5:1, and then add 2% molding agent. After drying, the cemented carbide mixture is obtained. Under the forming pressure of 150MPa, the mixed material was pressed into a cemented carbide blank,...

Embodiment 2

[0053] A new cemented carbide binder phase is configured with mass fractions of 48.5% Ni, 19.5% Fe, 2.0% Co, 19.5% Cr, 5.5% Mo, 3.5% Ti, 1.0% Nb, 0.4% Al, 0.1% Nb ; Wherein, the total mass of Co, Ni and Fe accounts for 70% of the binder phase. All raw materials are metal elemental powder with a particle size of 150-350 mesh, adding cemented carbide balls according to the ball-to-material ratio of 15:1, placing them in a planetary ball mill tank with a cemented carbide lining, adding anti-oxidant media and ball milling in an Ar atmosphere After 32 hours, prefabricated binder phase particles with an average particle size of less than 1 micron were obtained after ultrasonic dispersion. Using WC particles with an average grain size of 3.0 μm, adding 12.5wt.% of prefabricated metal binder phase, adding alloy balls at a ball-to-material ratio of 3:1, mixing for 20 hours by traditional wet grinding, adding 2% organic Forming forming agent, after drying, cemented carbide mixture is o...

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Abstract

The invention discloses a hard alloy with a binding phase intensified by virtue of heat treatment and a preparation method of the hard alloy. Such elements as Co, Ni and Fe are taken as the major raw materials of the binding phase of the hard alloy, and metal powder such as Cr, Mo, W and Ti is added, and then the binding phase of the hard alloy is prepared by use of a chemical alloying or chemical synthesis method; an intensified phase is generated in situ inside the binding phase of the hard alloy by virtue of heat treatment; the problem of uneven dispersion of the intensified phase or additives easily occurring in other hard alloy binding phase intensifying methods is effectively solved; the formation of a brittle region in the binding phase and the reduction of the toughness of the alloy are avoided. According to the hard alloy with the binding phase intensified by virtue of heat treatment, the strength of the binding phase of the hard alloy can be effectively improved under the premise of guaranteeing the toughness; meanwhile, the preparation method is easy to implement, is relatively low in cost and is convenient for large-batch production.

Description

technical field [0001] The invention relates to the technical field of hard alloy material manufacture, in particular to a cemented carbide strengthened by heat treatment of a binder phase and a preparation method thereof. Background technique [0002] Cemented carbide is mainly composed of tungsten carbide hard phase and iron, cobalt, nickel and other iron group metal binder phases. Since the 1930s, cemented carbide has been widely used in metal processing, engineering machinery, and mold manufacturing and other industrial fields. With the development of modern industry, the performance requirements for cemented carbide tools and structural parts are increasing day by day. On the basis of the traditional tungsten carbide-iron group metal alloy, the introduction of many new technologies such as carbide solid solution, coated cemented carbide, hot isostatic pressing sintering, etc., makes the cemented carbide continue to develop to meet the requirements of modern industry an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C29/00C22F1/16B22F1/00
Inventor 曾祺森吴冲浒聂洪波刘超冯炎建李文强文晓肖满斗谢海唯
Owner XIAMEN TUNGSTEN CO LTD
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