Preparation method for (WC/high-speed steel) steel-bonded cemented carbide and lamination material

A technology of steel-bonded hard alloy and high-speed steel, which is applied in the direction of metal material coating technology, coating, decorative art, etc., can solve the problems of backward equipment, uneven distribution of WC particles, etc., and achieve easy machining and promotion Use, efficient effect

Inactive Publication Date: 2014-06-25
吴庆华 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At that time, the equipment for adding WC particles to molten steel was still very backward (outer ring method)
WC particles cannot be injected into molten steel at high speed, so it will cause uneven distribution of WC particles in the steel, which is the fatal weakness of the outer ring method

Method used

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  • Preparation method for (WC/high-speed steel) steel-bonded cemented carbide and lamination material
  • Preparation method for (WC/high-speed steel) steel-bonded cemented carbide and lamination material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare a piece of 20kg, WC20% (mass) / M 2 High-speed steel 80% (mass) high-speed solid-phase particle spray-deposited steel-bonded carbide. The M 2 The high-speed steel alloy liquid has a total injection time of 10 minutes, a melting point of 1480°C, solid phase particles of 4 kg of WC powder, and an average particle size of 1.5 μm. Using 1MPa pressure, high-purity N 2 Gas is a particle accelerating gas, and its preparation method and steps are as follows:

[0028] 1.1 Selection of raw materials

[0029] m 2 16kg of high-speed steel ingot (broken material), 4kg of pure WC powder (purity > 99.9% by mass), high-purity N 2 Gas 4 bottles.

[0030] 1.2 Modulation of high-speed solid-phase particle flow

[0031]According to the deposition rate (1.6kg / min) and alloy composition WC20% (mass) + steel (balance), it can be known that the supply rate of high-speed solid phase particle WC powder is 400g / min. A low-speed and infinitely variable speed motor is used. See attac...

Embodiment 2

[0045] Prepare a piece of 450X450mm 2 Double-layer composite armor plate, the composition of superhard composite layer alloy on the surface is WC30% (mass); M 2 High speed steel 70% (mass); thickness 5mm; density 9.63g / cm 3 , the substrate is 45 ordinary carbon steel plate (450X450X10)mm 3. , see attached figure 1 Middle 11. Its preparation method and steps are as follows:

[0046] 2.1 Selection of raw materials

[0047] Super hard layer volume V 1 =(45X45X0.5)cm 3 =1012cm 3

[0048] Super hard layer weight W 0 =1012cm 3 X9.63g / cm 3 =9764.3g

[0049] WC powder weight W 1 =9746.3X30%=2923.9g;

[0050] m 2 High speed steel weight W 2 =9746.3X70%=6822.4g

[0051] The average particle size of WC powder is 1.5μm; the purity is 99.9%

[0052] 2.1.2 Molten steel injection speed and process parameters

[0053] The melting amount of molten steel is 6.83kg, and the actual melting is 7kg. The spraying deposition rate of molten steel is controlled at 0.7kg / min, the spr...

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Abstract

The invention belongs to the technical field of injection deposition of(WC/high-speed steel) steel-bonded cemented carbide and preparation of lamination materials, and provides a new method for preparing (WC/high-speed steel) steel-bonded cemented carbide by employing high-speed solid-phase particles such as WC, TiC or VC to performing injection deposition on a high-speed molten steel flow, and a new steel type for superhard cutter steel and hot work die steel. The invention provides a new technology for preparing armoring and special composite wear-resistant parts formed by compounding two layers or multiple layers of WC superhard high-speed steel and plain carbon steel or stainless steel. The invention provides a technical means for performing high-energy rapid quenching on molten steel, and under all kinds of technological states, the prepared (WC/high-speed steel) steel-bonded cemented carbide possesses the mechanical properties comprehensively better than those of conventional high-speed steel. A new special research means is provided for researching and developing new materials and revealing new phenomenon in material science. The technical scheme enables our country injection deposition technology to be improved to a world leading level, and have wide popularization meaning and application value.

Description

technical field [0001] The invention belongs to the technical field of preparation of (WC / high-speed steel) superhard alloys, and in particular provides a method of using WC particles and N 2 Or the special metallurgical technology of spraying deposition of high-speed steel alloy liquid flow by Ar high-speed multi-phase gas flow. Provides a brand new cooling rate (10 4.5 -10 6 °C / s), excellent high-temperature instantaneous multiphase mixing means, high-energy rapid droplet particle impact forming, and rapid quenching of alloys, etc., combined with excellent special metallurgical conditions, the technology of the present invention can not only prepare WC particle reinforced ( WC / high-speed steel) steel-bonded hard alloy composite materials, or directly prepare (WC / high-speed steel) steel-bonded hard alloy parts with special appearance and size requirements. At the same time, double-layer and multi-layer composite (armor) materials or components of (WC / high-speed steel) and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/12B44B5/02C23C4/123
Inventor 吴庆华吴庆文金昕吴成义关丽红郭志猛张丽英
Owner 吴庆华
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