Preparation method of hard alloy for manufacturing automobile tyre studs

A technology of cemented carbide and automobile tires, which is applied in the field of cemented carbide preparation, can solve problems such as lack of anti-skid studs, and achieve the effects of prolonging service life, improving strength, and good wear synchronization

Inactive Publication Date: 2013-04-03
浙江东钨实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the automobile tire studs made of cemented carbide on the market cannot meet the above requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: a kind of preparation method that is used to manufacture the cemented carbide of automobile tire stud, comprises:

[0016] (1) Ingredients: including the following ingredients: 86.5wt%WC, 10wt%Co, 1wt%Ni and 1.5wt%TiC;

[0017] The above average Fischer particle size of WC is 2um, that of Co is 1.5um, and that of TiC is 1.5um.

[0018] (2) Wet milling: 240-280ml of alcohol with a concentration of 92-94mol / L is added to each kilogram of ingredients as the ball milling medium; the wet milling step is milled by a ball mill, and the ball milling parameters are: ball mill speed 33-36rpm, filling factor 0.5, the solid-to-liquid ratio is 3:1, the grinding time is 30-40 hours, and the ball-to-material ratio is 3.5:1.

[0019] (3) Stirring: the above-mentioned wet-milled ingredients are passed through a 220-mesh wet sieve to remove impurities, and then stirred until they are uniform. Stirring makes the ingredients after wet grinding evenly mixed, and then makes t...

Embodiment 2

[0025] Embodiment 2: a kind of preparation method that is used to manufacture the cemented carbide of automobile tire stud, comprises:

[0026] (1) Ingredients: including the following ingredients: 88wt%WC, 9.5wt%Co, 1.5wt%Ni and 1wt%TiC;

[0027] The above average Fischer particle size of WC is 2um, that of Co is 1.5um, and that of TiC is 1.5um.

[0028] (2) Wet milling: 240-280ml of alcohol with a concentration of 92-94mol / L is added to each kilogram of ingredients as the ball milling medium; the wet milling step is milled by a ball mill, and the ball milling parameters are: ball mill speed 33-36rpm, filling factor 0.5, the solid-to-liquid ratio is 3:1, the grinding time is 30-40 hours, and the ball-to-material ratio is 3.5:1.

[0029] (3) Stirring: Stir the above wet-milled ingredients until they are uniform.

[0030] (4) Drying: After the stirred ingredients are atomized through the nozzle, they are dried through a drying tower filled with nitrogen to realize solid-liqui...

Embodiment 3

[0035] Embodiment 3: a kind of preparation method that is used to manufacture the cemented carbide of automobile tire stud, comprises:

[0036] (1) Ingredients: including the following ingredients: 87wt%WC, 10.5wt%Co, 0.5wt%Ni and 2wt%TiC;

[0037] The above average Fischer particle size of WC is 2um, that of Co is 1.5um, and that of TiC is 1.5um.

[0038] (2) Wet milling: 240-280ml of alcohol with a concentration of 92-94mol / L is added to each kilogram of ingredients as the ball milling medium; the wet milling step is milled by a ball mill, and the ball milling parameters are: ball mill speed 33-36rpm, filling factor 0.5, the solid-to-liquid ratio is 3:1, the grinding time is 30-40 hours, and the ball-to-material ratio is 3.5:1.

[0039] (3) Stirring: Stir the above wet-milled ingredients until they are uniform.

[0040] (4) Drying: After the stirred ingredients are atomized through the nozzle, they are dried through a drying tower filled with nitrogen to realize solid-liquid...

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Abstract

The invention relates to a preparation method of hard alloy for manufacturing automobile tyre studs. The preparation method comprises the steps of ingredient preparing, wet grinding, drying, pressing, sintering and passivating so as to prepare the hard alloy. The prepared hard alloy comprises the following ingredients in percentage by weight: 86.5%-88% of WC, 9.5%-10.5% of Co, 0.5%-1.5% of Ni and 1%-2% of TiC. The hardness (HRA) of the hard alloy prepared by the method disclosed by the invention is 88.5-89.5, the strength of the hard alloy is more than or equal to 2400N/mm<2>, the density of the hard alloy is 13.6-13.9 g/cm<3>, and the RS value of the hard alloy is 80mm-100mm. The stud manufactured by the hard alloy prepared by the method disclosed by the invention is high in strength, good in impact toughness, high in wear resistance and good in abrasion synchronicity with an automobile tyre, and can ensure the friction between the automobile tyre and the ground and prolong the service life of the automobile tyre.

Description

technical field [0001] The invention relates to a preparation method of cemented carbide used for manufacturing automobile tire studs. Background technique [0002] In some Nordic countries, there is an ice and snow season for more than half a year, which brings great difficulties to people's travel. Ordinary car tires cannot walk on such roads, so it is very important to develop a car anti-skid tire that can walk on ice and snow roads. Cemented carbide is the most suitable material for making automobile anti-skid studs due to its high wear resistance and impact toughness. Due to the particularity of the material requirements of the automobile cleats: First, the wear of the cleats and the rubber of the car must be synchronized. If the cleats wear too fast, their original function will be lost. If the wear is too slow, the whole cleats will be worn out from the tire Second, the material of the anti-skid studs must have high impact toughness, so that the anti-skid studs will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C29/08
Inventor 吴立志张敬利蔡久都黄云刚
Owner 浙江东钨实业有限公司
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