Whisker plasticizing tungsten carbide-cobalt base hard alloy material and its preparation process

A cobalt-based cemented carbide and preparation process technology, applied in the field of cemented carbide materials, can solve the problems of limiting the potential performance of the matrix material, the adhesion of the processed metal, and the limitation of the use temperature, achieving excellent physical and mechanical properties, and improving toughness. , the effect of excellent hardness and compressive strength

Inactive Publication Date: 2007-08-01
INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for cutting tool cemented carbide materials, the use temperature is limited due to the existence of metal phases (such as Co), which is not only easy to oxidize, soften and fail, but also easy to adhere to the metal to be processed, which limits the potential performance of the matrix material. full play

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: Preparation of powder metallurgy compression molding vacuum sintered product:

[0038] 1. Ingredients: The chemical composition of the material (in terms of mass percentage) is 99.9% of tungsten carbide-cobalt cemented carbide powder and 0.1% of titanium carbide whisker. First calculate the tungsten carbide-cobalt cemented carbide powder and titanium carbide according to the conventional alloy batching method The addition of whiskers, and then the two are mixed to obtain ingredients;

[0039] 2. Grinding: Add the prepared ingredients to ethanol and mix them, put them into a ball mill and grind them for 0.5 hours to get a uniform mixture;

[0040] 3. Billet making: According to the conventional powder metallurgy process, the mixture is pressed into a regular shape to obtain a blank;

[0041] 4. Sintering: Heating the finished product blank to a temperature of 1300°C in a vacuum, keeping it warm for 1 hour, and cooling with the furnace to obtain a finished ...

Embodiment 2

[0042] Embodiment 2: Preparation of powder metallurgy compression molding vacuum sintered product:

[0043] 1. Ingredients: The chemical composition of the material (by mass percentage) is 8 3 tungsten carbide-cobalt cemented carbide powders and 17 titanium carbide whiskers. The addition amount of whisker, then mix the two, obtain batching;

[0044] 2. Grinding: Mix the prepared ingredients with ethanol, put them into a ball mill and grind for 15 hours to get a uniform mixture;

[0045] 3. Billet making: According to the conventional powder metallurgy process, the mixture is pressed into a regular shape to obtain a blank;

[0046] 4. Sintering: Heating the finished product blank to a temperature of 1650°C in a vacuum, keeping it warm for 4 hours, and cooling with the furnace to obtain a finished product.

Embodiment 3

[0047] Example 3: Preparation of powder metallurgy injection molding vacuum sintered product

[0048] 1. Ingredients: The chemical composition of the material (by mass percentage) is 80% of tungsten carbide-cobalt cemented carbide powder and 20% of titanium carbide whisker. First, calculate the tungsten carbide-cobalt cemented carbide powder and titanium carbide crystal Adding amount of mustard, and then mix the two to obtain ingredients;

[0049] 2. Grinding: Mix the prepared ingredients with ethanol, put them into a ball mill and grind for 20 hours to get a uniform mixture;

[0050] 3. Blank making: according to the injection molding process, put the mixture into the injection machine, and then inject it into the mold to form a blank;

[0051] 4. Sintering: heat the finished product blank to 1700°C in vacuum, keep it warm for 10 hours, and cool it with the furnace to get the finished product.

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Abstract

The invention discloses a crystal whisker toughened tungsten carbide cobalt-base hard alloy material and the preparing method. It takes powder metallurgy technology, employs tungsten carbide- cobalt as base material, adds titanium carbide crystal whisker and prepares toughened tungsten carbide cobalt-base hard alloy material through a certain process. It is characterized in that: (1) employs powder metallurgy technology and prepares out product with different shapes. (2) the rigidity is high, compression strength and toughness are good, the titanium carbide crystal whisker increases toughness on basis of guranteeing strength of said alloy, and it aslo can be used to replace cobalt and as adhesive phase, to improve material performance. (3) the process is simplea nd cost is low. The hard alloy material can be used in mechanics, metallurgy, mine, first-order instrument and military, and uesd to prepare kinds of blade and drilling button, and new knife tool material.

Description

technical field [0001] The invention relates to hard alloy materials, in particular to a whisker-toughened tungsten carbide-cobalt-based hard alloy material and a preparation process thereof. Background technique [0002] Tungsten carbide-cobalt (WC-Co)-based cemented carbide has special corrosion resistance, high hardness, excellent fracture toughness and compressive strength, known as modern industrial teeth, in machinery, metallurgy, mining, precision instruments, military and other industries occupy an extremely important position. With the in-depth research on WC-Co cemented carbide, its physical properties have been greatly improved, and its application fields have also expanded from ordinary cutting tools, molds, wear-resistant parts, wear-resistant coatings to satellite drills for integrated circuit boards, and aerospace materials. High-temperature alloy processing, indexable inserts and rock drilling buttons, etc. However, for cutting tool cemented carbide materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/04B22F3/10B22F9/04
Inventor 陆德平陆磊陈志宝曾卫军谢仕芳胡学军
Owner INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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