Unlock instant, AI-driven research and patent intelligence for your innovation.

Hard alloy suitable for cutting high-temperature alloy and preparation method of hard alloy

A cemented carbide and superalloy technology, which is applied in the field of cemented carbide and its preparation, can solve the problems of unsuitable superalloy cutting, poor toughness matching, poor adhesion resistance, etc., and achieves good matching, The effect of improving the overall performance and resistance to thermal shock and thermoplastic deformation

Inactive Publication Date: 2018-05-29
株洲锐利诚切削工具有限公司
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional cemented carbides are not suitable for cutting high-temperature alloys due to poor matching between high-temperature hardness and good toughness, especially poor adhesion resistance, resulting in poor cutting performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The weight percentage of Co powder is 9.0%, TaC powder is 2.0%, VC+Cr3C2 is 1.2%, and the balance is 02 type WC powder. The Fischer particle size is 0.20μm and the Hcp value is 50~55KA / m. Total 100%; anhydrous alcohol is used as the ball milling medium, the liquid-to-solid ratio is 450ml / Kg, the mass ratio of ball material is 6:1, the ball milling time is 144 hours, the mixture is made by spray drying, and after compression molding, it is placed in pressure for sintering Sintering is carried out at 1430°C in the furnace. PS21 (size 6.5×5.25×20mm) sample strip is used as the standard product for testing the cemented carbide prepared by the method of this embodiment. The average WC grain size is 0.2μm, the bending strength is 4000MPa, and the hardness is Hv 30 1980.

Embodiment 2

[0018] When mixing, choose Co powder with a weight percentage of 9.0%, TaC powder with 3.0%, 1.0% VC+Cr3C2, and a balance of 02-type WC powder, with a Fisher particle size of 0.25μm and a Hcp value of 48-52KA / m; Anhydrous alcohol is used as the ball milling medium, the liquid-solid ratio is 440ml / Kg, the ball-to-battery ratio is 6:1, and the ball milling time is 144 hours. The mixture is prepared by spray drying. After compression molding, it is placed in a pressure sintering furnace at 1430℃ Sintering. PS21 (size 6.5×5.25×20mm) sample strip is used as the standard product for testing the cemented carbide prepared by the method of this embodiment. The average WC grain size is 0.25μm, the bending strength is 4200MPa, and the hardness is Hv 30 1890.

Embodiment 3

[0020] The weight percentage of Co powder is 9.5%, TaC powder is 3.0%, VC+Cr3C2 is 1.0, and the balance is 02 type WC powder. Its Fisher particle size is 0.28μm and Hcp value is 47~51KA / m; Anhydrous alcohol is used as the ball milling medium, the liquid-to-solid ratio is 420ml / Kg, the ball-to-battery ratio is 6:1, and the ball milling time is 135 hours. The mixture is prepared by spray drying. After compression molding, it is placed in a pressure sintering furnace at 1420℃. sintering. Take PS21 (size 6.5×5.25×20mm) sample strip as the standard product for testing the cemented carbide prepared by the method of this embodiment. The average WC grain size is 0.28μm, the bending strength is 4000MPa, and the hardness is Hv 30 1830.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
crystal sizeaaaaaaaaaa
flexural strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a hard alloy suitable for cutting a high-temperature alloy and a preparation method of the hard alloy. The hard alloy suitable for cutting the high-temperature alloy comprisesthe following components by weight percent: 8.0-12.0% of Co powder, 2.0-4.0% of TaC powder, 1.0-1.5% of VC and Cr3C2, and the balance of WC powder, wherein the Fisher particle size of the WC powder is0.2-0.4 [mu]m, the total is 100%. The hard alloy realizes the excellent matching of the high-temperature hardness and toughness, and the comprehensive performance and the capabilities of thermal shock resistance and thermoplastic deformation resistance of the hard alloy are improved.

Description

Technical field [0001] The invention relates to a hard alloy suitable for cutting high-temperature alloys and a preparation method thereof. Background technique [0002] At present, superalloys have excellent high temperature strength, thermal stability and thermal fatigue resistance. Therefore, they are widely used in aerospace, shipbuilding, nuclear industry, power stations and other industries, such as modern gas turbine engine combustion chambers, turbine guide vanes and working blades , Turbine discs and turbine rotor structural parts, aero-engine discs, ring parts and other high-temperature rotating parts, etc. [0003] One of the most difficult-to-machine materials for high-temperature alloys. If the workability of 45# steel is 100%, the relative workability of high-temperature alloys is only 5%-20%. Its cutting characteristics are: ①The cutting force is large, and it is ordinary steel 2~4 Times. ②The cutting temperature is high, up to 1000℃. The thermal conductivity of h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05C22C1/10
CPCC22C29/08C22C1/051C22C29/067
Inventor 周悫昱
Owner 株洲锐利诚切削工具有限公司