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Hard alloy shaft sleeve and preparation method thereof

A cemented carbide and shaft sleeve technology, applied in the field of powder metallurgy, can solve the problems of high roughness of the shaft sleeve and difficult inner hole polishing, and achieve the effects of prolonged degumming time, low cost and high efficiency

Active Publication Date: 2019-06-11
成都川硬合金材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And because the shaft sleeve is matched with the shaft, the inner hole of the shaft sleeve needs to be polished to reduce the roughness value of the inner surface of the shaft sleeve. However, the shaft sleeve prepared by existing materials and technical methods has high roughness, and the inner hole Difficult to polish

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: a kind of hard fitting shaft sleeve, it comprises the raw material of following weight part:

[0035] Tungsten carbide: 70; Nickel: 3;

[0036] Titanium carbide: 5; cobalt powder: 2;

[0037] Tantalum niobium solid solution: 1; chromium powder: 1.

[0038] Wherein, the tungsten carbide is recycled powder, and the particle size of the tungsten carbide is 0.4-0.5 μm.

[0039] The preparation method of above-mentioned cemented carbide axle sleeve, it comprises the following steps:

[0040] S1. Raw material preparation: Weigh each raw material according to the ratio of the above formula and set aside;

[0041] S2. Ball milling: First add titanium carbide and tantalum-niobium solid solution into the ball mill for ball milling. The ball-to-material ratio of the ball mill is 3:1, and the speed is 30 rpm. After 10 hours of ball milling, add tungsten carbide, nickel, cobalt powder and cadmium powder , and inject industrial alcohol and ball mill for 20-28 hours ...

Embodiment 2

[0046] Embodiment 2: a kind of cemented carbide axle sleeve, it comprises the raw material of following weight part:

[0047] Tungsten carbide: 83; Nickel: 10;

[0048] Titanium carbide: 15; cobalt powder: 5;

[0049] Tantalum niobium solid solution: 3; chromium powder: 3.

[0050] Wherein, the tungsten carbide is recycled powder, and the particle size of the tungsten carbide is 0.4-0.5 μm.

[0051] The preparation method of above-mentioned cemented carbide axle sleeve, it comprises the following steps:

[0052] S1. Raw material preparation: Weigh each raw material according to the ratio of the above formula and set aside;

[0053] S2. Ball milling: First add titanium carbide and tantalum-niobium solid solution into the ball mill for ball milling. The ball-to-material ratio of the ball mill is 10:1, and the speed is 45 rpm. After 12 hours of ball milling, add tungsten carbide, nickel, cobalt powder and cadmium powder , and inject industrial alcohol and ball mill for 28 hours...

Embodiment 3

[0057] Embodiment 3: a kind of cemented carbide sealing ring, it comprises the raw material of following weight part:

[0058] Tungsten carbide: 78; Nickel: 7;

[0059] Titanium carbide: 13; cobalt powder: 2;

[0060] Tantalum niobium solid solution: 2; Chromium powder: 1;

[0061] Chromium carbide: 0.5.

[0062] Wherein, the tungsten carbide is recycled powder, and the particle size of the tungsten carbide is 0.4-0.5 μm.

[0063] The preparation method of above-mentioned cemented carbide sealing ring, it may further comprise the steps:

[0064] S1. Raw material preparation: Weigh each raw material according to the ratio of the above formula and set aside;

[0065] S2. Ball milling: First add titanium carbide and tantalum-niobium solid solution into the ball mill for ball milling. The ball-to-material ratio of the ball mill is 5:1, and the speed is 40 rpm. After 11 hours of ball milling, add tungsten carbide, nickel, cobalt powder, and cadmium powder and chromium carbide,...

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Abstract

The invention discloses a hard alloy shaft sleeve and a preparation method thereof. The shaft sleeve is composed of the following raw materials: tungsten carbide, nickel, titanium carbide, cobalt powder, a tantalum-niobium solid solution and chromium powder; and the preparation method of the shaft sleeve comprises the steps of material preparation, ball milling, drying, forming, sintering, and post-processing. According to the hard alloy shaft sleeve and the preparation method thereof, by scientific and reasonable compatibility of various components of the tungsten carbide, the nickel, the titanium carbide, the cobalt powder, the tantalum-niobium solid solution and the chromium powder, an obtained hard alloy shaft sleeve has high hardness, high bending strength, the wear resistance and acid-alkali resistance of the hard alloy shaft sleeve are improved, and the service life is significantly prolonged; the preparation method of the hard alloy shaft sleeve is advantageous to product processing, the operation is easy, the preparation is convenient, the surface roughness of a sealing ring of the shaft sleeve is lower, and the method is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a cemented carbide shaft sleeve and a preparation method thereof. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. Cemented carbide has excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which basically remain unchanged even at a temperature of 500 ° C. It still has high hardness at 1000°C. Cemented carbide is widely used in machinery, construction and other industries. [0003] Bushing is the sleeve on the propeller shaft or stern shaft. The bearing (called "shaft receiver" by the Japanese) is a component that fixes and reduces the friction coefficient of the load during the mechanical transmission process. The bushin...

Claims

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Application Information

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IPC IPC(8): C22C29/08C22C1/05B22F3/14
Inventor 周宗发
Owner 成都川硬合金材料有限责任公司
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