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Preparation method of a high-strength wear-resistant powder metallurgy composite material

A technology of powder metallurgy and composite materials, applied in the field of superhard materials and powder metallurgy composite materials, can solve the problems of difficulty in improving at the same time, and achieve the improvement of work efficiency and service life, the simultaneous improvement of strength and wear resistance, and the ability of bezel-setting. Enhanced effect

Inactive Publication Date: 2015-12-02
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, for the powder metallurgy impregnated diamond cutting tools used for crushing rocks, the efficiency, service life and overall strength of cutting rocks are the three major indicators to evaluate its performance. Various metal powders of 50-300 mesh are basically used at home and abroad. It is uniformly mixed with single crystal or polycrystalline diamond in a certain proportion, and it is realized by the preparation method with cutting or grinding function formed by hot pressing or pressureless impregnation method. It is usually difficult to improve these three parameters at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Hot-pressed WC-based carcass formula: first, WC powder (50%), 663 bronze powder (22%), YG6 (18%), Ni powder (5%), Mn powder (3%), Co powder (2%) ), put it into a mixing container, and perform mechanical ball milling with a three-dimensional mixer for 24 hours; weigh 0.05% carbon nanotubes in a high-temperature-resistant crucible (ultrasonic vibration in ethanol for 10 minutes, and vacuum oven at 100°C drying for 30 minutes), mixed with uniform metal powder, and stirred for 30 minutes to obtain a mixed powder; then 20% diamond was added and stirred for 30 minutes to obtain the final composite material powder. Put the powder obtained above into the mold, hot press sintering, the sintering temperature is 980°C, keep warm for 5min, and the pressure is 100kgf / cm 2 , to obtain the desired diamond impregnated cutting teeth.

Embodiment 2

[0016] Formula for pressureless impregnation of WC-based carcass: weigh 88g of 60-400 mesh cast WC powder, 12g of atomized nickel powder, and 0.05g of carbon nanotube material. Its mixing method is identical with embodiment 1. Put the powder obtained above into the mold, put 100g of copper alloy impregnated metal on it, and sinter by the pressureless impregnation method, the sintering temperature is 1170, and the temperature is kept at ℃ for 30 minutes to obtain the desired diamond impregnated cutting teeth.

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PUM

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Abstract

The invention discloses a high-strength abrasion-resistant powder metallurgy composite material and a preparation method thereof. Basic alloy blank powder is mixed evenly through a mechanical ball mill to form evenly mixed alloy powder to obtain basic alloy blank powder. The obtained basic alloy blank powder and carbon nano tubes are mixed and stirred according to the volume ratio of 200:1-20:1, and mixed powder is pasty, can flow in a vessel and is stirred by a stirrer to form even blank powder containing the nano tubes. The obtained blank powder and diamond particles are mixed and stirred according to the volume ratio of 19:1-3:2 to form an evenly mixed powder material embedded with diamond. The obtained powder material is filled in a graphite jig, and a carbon nano tube fiber strengthened diamond composite material is obtained through a hot-press sintering method or a pressureless impregnation sintering method. The carbon nano tube fiber strengthened diamond composite material is good in comprehensive performance, the blank hardness and the integral strength are obviously improved, diamond embedding capacity of blanks is enhanced, and the abrasion resistance is improved.

Description

technical field [0001] The invention relates to a powder metallurgy composite material, in particular to a high-strength wear-resistant powder metallurgy composite material which uses carbon nanotubes as reinforcement materials, powder metallurgy mixed materials as the basic matrix, and diamond as the wear-resistant phase, belonging to the category of superhard materials . Background technique [0002] At present, for the powder metallurgy impregnated diamond cutting tools used for crushing rocks, the efficiency, service life and overall strength of cutting rocks are the three major indicators to evaluate its performance. Various metal powders of 50-300 mesh are basically used at home and abroad. It is uniformly mixed with single crystal or polycrystalline diamond in a certain proportion, and it is realized by a preparation method with cutting or grinding function formed by hot pressing or pressureless impregnation method. It is usually difficult to improve these three param...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C32/00C22C1/05
Inventor 孙友宏高科李梦
Owner JILIN UNIV