Superfine YG type hard alloy containing light-heavy rare earth and preparation method thereof

A cemented carbide, light and heavy rare earth technology, applied in the field of ultra-fine cemented carbide preparation, to achieve the effect of easy implementation, saving investment and energy consumption, and improving hardness

Inactive Publication Date: 2012-02-29
CHONGQING UNIV OF ARTS & SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patents related to cryogenic technology at home and abroad are mainly concentrated in the preparation process of steel and tr...

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  • Superfine YG type hard alloy containing light-heavy rare earth and preparation method thereof

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Embodiment 1

[0017] The ultra-fine YG type hard alloy containing light and heavy rare earth composite additives is characterized in that the components of the hard alloy are: WC hard phase, Co binding phase and composite rare earth additives. The mass of WC hard phase accounts for 91% of cemented carbide, the mass of Co binder phase accounts for 8% of cemented carbide, the mass of light rare earth La, Ce, Nd accounts for 0.6% of cemented carbide, and the mass of heavy rare earth Dy, Y The mass accounts for 0.4% of the cemented carbide.

[0018] A method for preparing ultra-fine YG-type cemented carbide containing light and heavy rare earth composite additives, the method steps are: after weighing various powder raw materials according to weight percentage, put the prepared powder raw materials into a high-energy ball mill for grinding, and the ball-to-material ratio is 10:1, using alcohol as the ball milling medium, adding paraffin, ball milling for 72 hours, drying and granulating into a ...

Embodiment 2

[0020] The ultra-fine YG type hard alloy containing light and heavy rare earth composite additives is characterized in that the components of the hard alloy are: WC hard phase, Co binding phase, grain growth inhibitor, and composite rare earth additive. The quality of the WC hard phase accounts for 90% of the cemented carbide, the quality of the Co binder phase accounts for 8% of the cemented carbide, and the grain growth inhibitors VC and Cr 3 C 2 The quality of TaC accounts for 1% of the cemented carbide, and the light rare earth La 2 o 3 , CeO 2 、Nd 2 o 3 The mass accounts for 0.6% of cemented carbide, heavy rare earth Y 2 o 3 The mass accounts for 0.4% of the cemented carbide.

[0021] A method for preparing ultra-fine YG-type cemented carbide containing light and heavy rare earth composite additives, the method steps are: after weighing various powder raw materials according to weight percentage, put the prepared powder raw materials into a high-energy ball mill fo...

Embodiment 3

[0023] The ultra-fine YG type hard alloy containing light and heavy rare earth composite additives is characterized in that the components of the hard alloy are: WC hard phase, Co binding phase, grain growth inhibitor, and composite rare earth additive. The mass of the WC hard phase accounts for 88% of the cemented carbide, the mass of the Co binder phase accounts for 10% of the cemented carbide, and the grain growth inhibitors VC and Cr 3 C 2 , The quality of TaC accounts for 1% of the cemented carbide, light rare earth CeO 2 、Nd 2 o 3 、Sm 2 o 3 The mass accounts for 0.6% of the cemented carbide, the heavy rare earth Dy 2 o 3 , Y 2 o 3 The mass accounts for 0.4% of the cemented carbide.

[0024] A method for preparing ultra-fine YG-type cemented carbide containing light and heavy rare earth composite additives, the method steps are: after weighing various powder raw materials according to weight percentage, put the prepared powder raw materials into a high-energy bal...

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Abstract

The invention provides a superfine YG type hard alloy containing light-heavy rare earth compound additives and a preparation method thereof. The hard alloy comprises components by weight percentage as follows: 83 percent to 95 percent of wolfram carbide (WC) hard phases, 6 percent to 15 percent of carbonic oxide (Co) bonding phases, and 0.3 percent to 1.5 percent of grain growth inhibitors, and when only rare earth is added, the weight percentage of the compound additives is 0.6 to 1 percent. Raw material powder with the components is ball-ground, dried and granulated, and a superfine mixture is obtained; and after being subjected to pressure forming, vacuum sintering or vacuum Ar-introducing sintering, the superfine mixture is subjected to subzero treatment for 2 hours at a temperature of 196 DEG C, and then the superfine hard alloy is obtained. The method of adding the rare earth additives when the mixed powder is wet-ground is simple and easy to apply. By adopting the light-heavy rare earth compound additives, the control of the production cost is facilitated and the production technology is optimized. The superfine YG type hard alloy containing the light-heavy rare earth compound additives has high hardness, high strength, good red hardness and the like, and is easily applied in the production.

Description

technical field [0001] The invention belongs to the technical field of ultrafine hard alloy preparation, in particular to ultrafine WC-Co hard alloy containing light and heavy rare earth and its preparation method. Background technique [0002] Tungsten-cobalt (YG) cemented carbide is currently the most commonly used matrix material for cemented carbide cutting tools at home and abroad. Ultra-fine YG-type cemented carbide has excellent physical and mechanical properties and good cutting performance, high hardness, strength and toughness, and good thermal shock resistance. The hardness and strength of ultra-fine YG cemented carbide are much higher than that of general YG cemented carbide with the same cobalt content. The hardness is generally 90-93HRA, and the bending strength is 2000-3500MPa. Therefore, ultra-fine-grained cemented carbide is suitable for the manufacture of small overall complex cemented carbide tools, which can greatly increase the cutting speed. [0003] ...

Claims

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Application Information

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IPC IPC(8): C22C29/08C22C1/05
Inventor 李力陈慧姜中涛陈巧旺邓莹涂铭旌
Owner CHONGQING UNIV OF ARTS & SCI
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