Bicrystal gradient hard alloy cutter material and preparation method thereof

A cemented carbide and tool material technology, used in mechanical equipment, other manufacturing equipment/tools, turbines, etc., can solve the problems of poor surface toughness, poor surface wear resistance, etc., to prevent grain growth, short sintering time, small investment

Inactive Publication Date: 2016-09-21
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Literature (The influence of sintering in nitrogen gason the microstructure of a WC–VC–TiC–Co cemented carbide, Hashe N G, Neethling J H, Andrén H O, et al, International Journal of Refractory Metals and Hard Materials, 2008, 26(5) : 404-410.) reported that a gradient cemented carbide surface rich in cubic phase has good surface wear resistance, but poor surf

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) 3μm and 0.95μm tungsten carbide (WC), 400nm titanium carbide (TiC), 1.26μm cobalt (Co), 200nm vanadium carbide (VC), 1μm chromium carbide (Cr 3 C 2 ), polyvinylpyrrolidone (PVP) as raw materials, the surface layer is 43 fine grain 9WC-13.5TiC-6Co+0.6VC-0.4Cr 3 C 2 -2PVP mass ratio mixed, transition layer according to 41 fine grain WC-8TiC-10Co+0.6VC-0.4Cr 3 C 2 -2PVP mass ratio mixed, the core layer is 31.9 fine grain WC-5.3TiC-15Co+0.6VC-0.4Cr 3 C 2 -2PVP mass ratio mixing, adding grinding balls according to the ratio of balls to materials of 8:1, adding absolute ethanol according to the ratio of absolute ethanol to materials of 200ml:1kg, after ball milling for 24 hours, adding 36.6 coarse-grained WC to the surface layer, and adding 41 coarse-grained WC to the transition layer Crystal WC, add 47.8 coarse crystal WC to the core layer, and continue ball milling for 24 hours;

[0030] (2) Put the mixed powder anhydrous ethanol mixture into a vacuum drying oven,...

Embodiment 2

[0034] (1) 3μm and 0.95μm tungsten carbide (WC), 400nm titanium carbide (TiC), 1.26μm cobalt (Co), 200nm vanadium carbide (VC), 1μm chromium carbide (Cr 3 C 2 ), polyvinylpyrrolidone (PVP) as raw materials, the surface layer is 43.9 fine grained WC-13.5TiC-6Co+0.6VC-0.4Cr 3 C 2 -2PVP mass ratio mixed, transition layer according to 41 fine grain WC-8TiC-10Co+0.6VC-0.4Cr 3 C 2 -2PVP mass ratio mixed, the core layer is 31.9 fine grain WC-5.3TiC-15Co+0.6VC-0.4Cr 3 C 2 -2PVP mass ratio mixing, adding grinding balls according to the ratio of balls to materials of 8:1, adding absolute ethanol according to the ratio of absolute ethanol to materials of 200ml:1kg, after ball milling for 24 hours, adding 36.6 coarse-grained WC to the surface layer, and adding 41 coarse-grained WC to the transition layer Crystalline WC, add coarse crystal 47.8WC to the core layer, and continue ball milling for 24 hours;

[0035] (2) Put the mixed powder anhydrous ethanol mixture into a vacuum drying...

Embodiment 3

[0039] (1) 3μm and 0.95μm tungsten carbide (WC), 400nm titanium carbide (TiC), 1.26μm cobalt (Co), 200nm vanadium carbide (VC), 1μm chromium carbide (Cr 3 C 2 ), polyvinylpyrrolidone (PVP) as raw materials, the surface layer is 43.9 fine grained WC-13.5TiC-6Co+0.6VC-0.4Cr 3 C 2 -2PVP mass ratio mixed, transition layer according to 41 fine grain WC-8TiC-10Co+0.6VC-0.4Cr 3 C 2 -2PVP mass ratio mixed, the core layer is 31.9 fine grain WC-5.3TiC-15Co+0.6VC-0.4Cr 3 C 2 -2PVP mass ratio mixing, adding grinding balls according to the ratio of balls to materials of 8:1, adding absolute ethanol according to the ratio of absolute ethanol to materials of 200ml:1kg, after ball milling for 24 hours, adding 36.6 coarse-grained WC to the surface layer, and adding 41 coarse-grained WC to the transition layer Crystal WC, add 47.8 coarse crystal WC to the core layer, and continue ball milling for 24 hours;

[0040] (2) Put the mixed powder anhydrous ethanol mixture into a vacuum drying ov...

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PUM

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Abstract

The invention belongs to the field of manufacturing of hard alloys, in particular to a bicrystal gradient hard alloy cutter material and a preparation method thereof. The bicrystal gradient hard alloy cutter material adopts tungsten carbide, titanium carbide, cobalt, vanadium carbide, chromium carbide and polyvinylpyrrolidone as raw materials; five symmetric gradient layers are provided; each layer contains coarse-grain tungsten carbide and fine-grain tungsten carbide from surface to inside; the ratio of coarse-grain tungsten carbide to fine-grain tungsten carbide is increased; the ratio of titanium carbide is reduced; and the ratio of a binding phase is increased. The preparation method comprises the steps of: ball milling of a mixture-drying and screening-molding by pressing-vacuum hot press sintering. The preparation method is low in equipment investment, convenient for operation, high in material utilization rate and suitable for industrial production; and the prepared product has a surface for satisfying the requirements of double high (high wear resistance and high toughness), and in particular, is suitable for interrupted metal turning and milling.

Description

technical field [0001] The invention belongs to the field of hard alloy manufacturing, and in particular relates to a twin-crystal gradient hard alloy cutting tool material satisfying "double high" (high wear resistance and high toughness) and a preparation method thereof. Background technique [0002] Since in the homogeneous cemented carbide, the hardness and wear resistance of the cemented carbide play an important role, the bonding has an important impact on the strength and toughness of the alloy. Due to the different effects of the two phases that make up the cemented carbide, the homogeneous structure cemented carbide becomes a contradiction. Generally speaking, alloys with higher binder phase content and lower hard phase content have low hardness and high toughness; alloys with high hard phase content and low binder phase content have high hardness and poor toughness. The contradictory characteristics of uniform structure cemented carbide restrict the further expans...

Claims

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Application Information

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IPC IPC(8): B22F7/02B22F5/00
CPCB22F7/02B22F5/00B22F2005/001B22F2999/00
Inventor 孙加林赵军
Owner SHANDONG UNIV
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