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Method for molding hard alloy functionally gradient materials

A technology of functionally graded materials and molding methods, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as difficulty in meeting

Active Publication Date: 2015-09-02
SEED TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a single material with uniform properties is often difficult to meet the above-mentioned fields with multiple application requirements.

Method used

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  • Method for molding hard alloy functionally gradient materials
  • Method for molding hard alloy functionally gradient materials
  • Method for molding hard alloy functionally gradient materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Preparation of WC-Co cemented carbide functionally graded composites

[0061] Weigh 95% WC granules and 5% Co powder to obtain the first alloy raw material; meanwhile, polyethylene, paraffin, polyethylene glycol and stearic acid are formulated to obtain additives for the surface layer mixture, the volume of which is 100%. The content ratios are: 18%, 57%, 23% and 2% respectively; then the above-mentioned additives and the first alloy raw material are mixed according to the volume ratio of 44:56 and mixed by ball milling to obtain a Fibonacci particle size of 0.5-1.2 μm. Surface mix.

[0062]Weigh WC particles with a mass percentage of 83.7% to 94.7%, 0.3% TaC particles and the remainder of Co powder to obtain the second alloy raw material; meanwhile, prepare polyethylene, paraffin wax, polyethylene glycol and stearic acid to obtain Additives for the intermediate layer mixture, the volume percentage ratios are respectively: 18-20%, 55-57%, 22-23% and 2-3%; Volume ratio...

Embodiment 2

[0089] Preparation of WC-Co cemented carbide functionally graded composites

[0090] Weigh the WC granules and 6% Co powder with a mass percentage content of 94% to obtain the first alloy raw material; simultaneously prepare polyethylene, paraffin, polyethylene glycol and stearic acid to obtain an additive for the surface layer mixture, and its volume is 100%. The content ratios are: 18%, 57%, 23% and 2% respectively; then the above-mentioned additives and the first alloy raw material are mixed according to the volume ratio of 43.5:56.5 and mixed by ball milling to obtain a Fibonacci particle size of 0.5-1.2 μm. Surface mix.

[0091] Weigh WC particles with a mass percentage of 86.2% to 92.2%, 0.3% TaC particles and the remainder of Co powder to obtain the second alloy raw material; meanwhile, prepare polyethylene, paraffin wax, polyethylene glycol and stearic acid to obtain Additives for the intermediate layer mixture, the volume percentage ratios are respectively: 18-20%, 5...

Embodiment 3

[0107] Preparation of WC-Co cemented carbide functionally graded composites

[0108] Weigh WC granule and 4% Co powder with a mass percentage content of 96% to obtain the first alloy raw material; meanwhile, polyethylene, paraffin, polyethylene glycol and stearic acid are formulated to obtain an additive for the surface layer mixture, and its volume is 100%. The content ratios are: 18%, 57%, 23% and 2% respectively; then the above-mentioned additives and the first alloy raw material are mixed according to the volume ratio of 44.5:55.5 through ball milling to obtain a Fibonacci particle size of 0.5-1.2 μm. Surface mix.

[0109] Weigh WC particles with a mass percentage of 83.7% to 94.7%, 0.3% TaC particles and the remainder of Co powder to obtain the second alloy raw material; meanwhile, prepare polyethylene, paraffin wax, polyethylene glycol and stearic acid to obtain Additives for the intermediate layer mixture, the volume percentage ratios are respectively: 18-20%, 55-57%, ...

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Abstract

The invention discloses a method for molding hard alloy functionally gradient materials. The method includes mixing additives with alloy materials to obtain mixtures; carrying out compound pressure molding on the obtained mixtures in compound die groups to obtain blanks; sintering the blanks to obtain the hard alloy functionally gradient materials. The compound die groups comprise outer-layer dies with high expansion coefficients, intermediate transition-layer die groups and inner-layer dies with low expansion coefficients. The method has the advantages that the large and multi-component hard alloy functionally gradient composite materials which are of complicated contour structures and are free of obvious interfaces can be manufactured by the aid of the method; the sintered molded functionally gradient materials are provided with gradient grain structures along the thickness directions of the sintered molded functionally gradient materials, the gradient grain structures are provided with the different components, have different grain sizes and are free of obvious interfaces, and accordingly the molded hard alloy materials are excellent in comprehensive mechanical performance with high hardness, abrasion resistance, strength and toughness.

Description

technical field [0001] The invention relates to the technical field of functionally graded materials, and more specifically, relates to a forming method of hard alloy functionally graded materials. Background technique [0002] Composite materials are materials with new properties composed of two or more materials with different properties through physical or chemical methods on the macroscopic (microscopic) level. Various materials learn from each other in terms of performance and produce synergistic effects, so that the comprehensive performance of the composite material is better than that of the original constituent materials to meet various requirements. [0003] Among many composite materials, functionally gradient materials are a special kind of composite materials. Different from ordinary composite materials, it uses two (or more) materials with different properties, and continuously changes the two (or more) materials. The composition and structure of a variety of)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B22F1/10
CPCC22C1/05C22C29/08B22F2207/01B22F2999/00B22F2998/10C22C1/051B22F1/10B22F3/1007B22F2201/20B22F1/103B22F3/225B22F3/12B22F3/15B22F3/20B22F7/08B22F2003/208
Inventor 徐跃华袁源王玉鹏
Owner SEED TECH CORP LTD
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