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A kind of cemented carbide sealing ring and preparation method thereof

A cemented carbide and sealing ring technology applied in the field of powder metallurgy to achieve low density, moderate cost, and small product deformation

Active Publication Date: 2020-11-24
SICHUAN CHUANWU CEMENTED CARBIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the cemented carbide sealing ring is a powder metallurgy seal made of carbide powder with high hardness and refractory metal as the main component, pressed into a ring with cobalt, nickel, and molybdenum as the binder, and sintered in a vacuum furnace or a hydrogen reduction furnace. ring, and the surface roughness Ra of the end face of the cemented carbide sealing ring is required to be 0.2 μm, which is difficult to meet this requirement with the existing processing methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: a cemented carbide sealing ring, which includes the following raw materials in parts by weight:

[0038] Tungsten carbide: 70; Nickel: 3;

[0039] Titanium carbide: 5; Cobalt powder: 2;

[0040] Tantalum-niobium solid solution: 1; Chromium powder: 1;

[0041] Chromium carbide: 0.3.

[0042] Wherein, the tungsten carbide is regenerated powder, the particle size of the tungsten carbide is 0.4-0.5 μm, and the nickel is produced by the carbonyl method.

[0043] The preparation method of the above-mentioned cemented carbide sealing ring, it comprises the following steps:

[0044] S1. Material preparation: Weigh each raw material according to the above formula ratio, and reserve;

[0045] S2. Ball milling: firstly add titanium carbide and tantalum-niobium solid solution into a ball mill for ball milling. The ball-to-material ratio of the ball mill is 3:1, the rotational speed is 30 rpm, and after ball milling for 10 hours, tungsten carbide, nickel, cobalt po...

Embodiment 2

[0051] Embodiment 2: a cemented carbide sealing ring, which includes the following raw materials in parts by weight:

[0052] Tungsten carbide: 83; Nickel: 10;

[0053] Titanium carbide: 15; Cobalt powder: 5;

[0054] Tantalum-niobium solid solution: 3; Chromium powder: 3;

[0055] Chromium carbide: 0.8.

[0056] Wherein, the tungsten carbide is regenerated powder, the particle size of the tungsten carbide is 0.4-0.5 μm, and the nickel is produced by the carbonyl method.

[0057] The preparation method of the above-mentioned cemented carbide sealing ring, it comprises the following steps:

[0058] S1. Material preparation: Weigh each raw material according to the above formula ratio, and reserve;

[0059] S2. Ball milling: firstly add titanium carbide and tantalum-niobium solid solution into a ball mill for ball milling. The ball-to-material ratio of the ball mill is 10:1, the rotational speed is 45 rpm, and after 12 hours of ball milling, tungsten carbide, nickel, cobalt ...

Embodiment 3

[0065] Embodiment 3: a cemented carbide sealing ring, which includes the following raw materials in parts by weight:

[0066] Tungsten carbide: 78; Nickel: 7;

[0067] Titanium carbide: 13; Cobalt powder: 2;

[0068] Tantalum-niobium solid solution: 2; Chromium powder: 1;

[0069] Chromium carbide: 0.5.

[0070] Wherein, the tungsten carbide is regenerated powder, the particle size of the tungsten carbide is 0.4-0.5 μm, and the nickel is produced by the carbonyl method.

[0071] The preparation method of the above-mentioned cemented carbide sealing ring, it comprises the following steps:

[0072] S1. Material preparation: Weigh each raw material according to the above formula ratio, and reserve;

[0073] S2. Ball milling: firstly add titanium carbide and tantalum-niobium solid solution into a ball mill for ball milling. The ball-to-material ratio of the ball mill is 5:1, the rotational speed is 40 rpm, and after 11 hours of ball milling, tungsten carbide, nickel, cobalt po...

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PUM

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Abstract

The invention discloses a hard alloy seal ring. The hard alloy seal ring comprises following raw materials of tungsten carbide, nickel, titanium carbide, cobalt powder, a tantalum niobium solid solution, chromium powder and chromium carbide. A preparing method of the seal ring comprises the steps of preparing, ball milling, drying, forming, sintering and aftertreatment. Through scientific and reasonable compatibility of tungsten carbide, nickel, titanium carbide, cobalt powder, the tantalum niobium solid solution, chromium powder and chromium carbide, the obtained hard alloy seal ring has theadvantages of being low in density, high in hardness, high in anti-bending strength, capable of improving the wear resistance and acid and alkaline resistance and capable of obviously prolonging the service life; and according to the preparing method of the hard alloy seal ring, the product machining is facilitated, operation is easy, preparing is convenient, the seal ring surface roughness is lower, and the method is suitable for industrial mass production

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a cemented carbide sealing ring and a preparation method thereof. Background technique [0002] Cemented carbide is an alloy material made of hard compound of refractory metal and bonding metal through powder metallurgy process. 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 remain basically unchanged even at a temperature of 500 °C. It still has high hardness at 1000℃. Carbide is widely used in machinery, construction, and mechanical seal industries. [0003] The traditional cemented carbide sealing ring mainly uses WC as the hard phase and metal Co or Ni as the binder, which is obtained by powder metallurgy process. With the rapid development of my country's petrochemical industry and the impro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/08B22F3/10B22F5/10C22C1/05
Inventor 周保华
Owner SICHUAN CHUANWU CEMENTED CARBIDE