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Nano hard alloy material containing spherical face-centered cubic structure cobalt powder and preparation process thereof

A technology of cubic structure and hard alloy, which is applied in the field of hard alloy materials containing spherical face-centered cubic cobalt powder and its preparation, can solve the problems of lack of performance, small gaps, and difficult formation of cobalt pools, etc., to make up for brittleness, The effect of small pores and inhibition of grain growth

Active Publication Date: 2012-10-31
重庆金锐新材料技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fcc structure cobalt powder has good wettability in the liquid phase, can completely cover the surface of WC grains, has small gaps, and is not easy to form a cobalt pool. On the contrary, the hcp structure cobalt powder does not have such properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Weigh 180g of 350nm tungsten carbide-titanium carbide-vanadium carbide-tantalum carbide-chromium carbide solid solution powder, and then weigh 1.5wt% of the total mass of the above drugs as the surfactant cetyltrimethylammonium bromide Mix with cerium oxide, use alcohol as the ball milling medium, and WC-Co cemented carbide balls as the grinding body, perform high-speed ball milling (ball-to-material ratio: 1:6), ball milling speed 500 rpm, ball milling time 12 hours;

[0023] (2) Weigh 120g of Co powder (250nm) and 700g of WC powder (200nm) respectively, and add them to the ball mill completed by pre-milling the solid solution (according to the ball-to-material ratio of 1:4 and 0.5~0.6L / Kg alcohol content into the alloy Balls and an appropriate amount of alcohol, and paraffin wax with a raw material weight ratio of 2%), then vacuumize the ball mill tank and fill it with nitrogen, then seal it and continue high-speed ball milling, and the ball milling time is 84 hour...

Embodiment 2

[0028] (1) Weigh 150g of 300nm tungsten carbide-titanium carbide-vanadium carbide-tantalum carbide-chromium carbide solid solution powder, and then weigh 2.0wt% of the total mass of the above drugs as the surfactant hexadecyltrimethylammonium bromide Mix with cerium oxide, use alcohol as the ball milling medium, and WC-Co cemented carbide balls as the grinding body, perform high-speed ball milling (ball-to-material ratio: 1:6), ball milling speed 500 rpm, ball milling time 12 hours;

[0029] (2) Weigh 140g of Co powder (200nm) and 710g of WC powder (200nm) respectively, and add them to the ball mill completed by pre-milling the solid solution (according to the ball-material ratio of 1:4 and 0.5~0.6L / Kg alcohol content into the alloy Balls and appropriate amount of alcohol, and paraffin wax with a raw material weight ratio of 2%), then vacuumize the ball mill tank and fill it with nitrogen, then seal it and continue high-speed ball milling, the ball milling time is 96 hours;

...

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Abstract

The invention provides a nano hard alloy material containing spherical face-centered cubic structure cobalt powder and a preparation process thereof and belongs to the technical field of hard alloy preparation. The method comprises the steps of using 12-14 wt.% of the spherical face-centered cubic structure cobalt powder with the average grain diameter in a range of 200-300nm, 65-70 wt.% of tungsten carbide with the average grain diameter in a range of 200-300nm, 16-23 wt.% of tungsten carbide-titanium carbide-vanadium carbide-tantalum carbide-chromium carbide solid solution powder with the average grain diameter in a range of 300-400nm and a proper amount of an active and surface dispersing agent, and combining with airtight inert gases to protect high-speed ball milling, spray drying and overpressure sintering, so that sintering bodies are compact to the maximum extent, grain growth is restrained, the high-temperature performance of an alloy is optimized, and finally the high-hardness high-strength hard alloy material is obtained. The process is optimal in technology, easy to operate and applicable to industrial production.

Description

technical field [0001] The invention belongs to the technical field of hard alloy preparation, in particular to a hard alloy material containing spherical face-centered cubic cobalt powder and a preparation method. Background technique [0002] Cemented carbide has high hardness, strength, wear resistance and corrosion resistance, known as "industrial teeth", used to manufacture cutting tools, knives, drilling tools and wear-resistant parts, widely used in military industry, aerospace , machining, metallurgy, oil drilling, ore tools, electronic communications, construction and other fields. The rapid development of China's cemented carbide industry has attracted the attention of the world. Fierce market competition promotes the development of advanced manufacturing technology led by machinery manufacturing technology at an unprecedented speed and breadth. High productivity and high quality are the two major pursuits of advanced manufacturing technology. Target. However, th...

Claims

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Application Information

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IPC IPC(8): C22C29/08C22C1/05
Inventor 邓莹张艳华邓玲姜中涛陈慧彭玲玲涂铭旌
Owner 重庆金锐新材料技术研究院有限公司
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