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A powder metallurgy moving ring and its preparation method

A technology of powder metallurgy and moving ring, applied in the field of powder metallurgy materials, can solve problems such as difficulty, product quality defects, easy looseness, etc., and achieve the effect of preventing alloy voids, avoiding product performance, and good wear resistance

Active Publication Date: 2022-05-17
宁波新宇硬质合金密封有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, it is prepared by adding powder material into the mold, then pressing and sintering, but due to the inner bump on the inner wall of the moving ring and the tapered surface on the inner bump, it is difficult to form Larger, easy to loose, resulting in product quality defects

Method used

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  • A powder metallurgy moving ring and its preparation method
  • A powder metallurgy moving ring and its preparation method
  • A powder metallurgy moving ring and its preparation method

Examples

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Embodiment 1

[0036] This embodiment discloses a powder metallurgy moving ring. The composition of the powder metallurgy material of the powder metallurgy moving ring is: 0.4% cobalt powder, 7.3% nickel powder, and tungsten carbide powder as the balance.

[0037] This embodiment also discloses a method for preparing the above-mentioned powder metallurgy moving ring, which includes the following steps:

[0038] Step 1. Powder mixing: Mix the following powders evenly. The powder components are: 0.4% cobalt powder, 7.3% nickel powder, and the balance is tungsten carbide powder, wherein the total carbon content in tungsten carbide powder is 6.0%.

[0039] Step 2, ball milling: using ethanol with a purity of more than 99% as the medium for wet milling, and ball milling for 48 hours, so that the particle size of the mixture is uniform and the particle size reaches 2 μm;

[0040] Step 3. Drying: Dry the ball-milled mixture at a low temperature of 50°C, and dry it for later use;

[0041] Step 4. A...

Embodiment 2

[0054] This embodiment discloses a powder metallurgy moving ring. The powder metallurgy material composition of the powder metallurgy moving ring is: 0.46% cobalt powder, 8.2% nickel powder, and tungsten carbide powder as the balance.

[0055] This embodiment also discloses a method for preparing the above-mentioned powder metallurgy moving ring, which includes the following steps:

[0056] Step 1. Powder mixing: Mix the following powders evenly. The powder components are: 0.46% cobalt powder, 8.2% nickel powder, and the balance is tungsten carbide powder; the total carbon content in the tungsten carbide powder is 5.95%.

[0057] Step 2, ball milling: using ethanol with a purity of more than 99% as the medium for wet milling, and ball milling for 48 hours, so that the particle size of the mixture is uniform and the particle size reaches 3 μm;

[0058] Step 3. Drying: Dry the ball-milled mixture at a low temperature of 60°C, and dry it for later use;

[0059] Step 4. Add moldi...

Embodiment 3

[0072] This embodiment discloses a powder metallurgy moving ring. The composition of the powder metallurgy material of the powder metallurgy moving ring is: 0.6% cobalt powder, 8.0% nickel powder, and tungsten carbide powder as the balance.

[0073] This embodiment also discloses a method for preparing a powder metallurgy moving ring, which includes the following steps:

[0074] Step 1. Powder mixing: Mix the following powders evenly. The powder components are: 0.5% cobalt powder, 8.0% nickel powder, and the balance is tungsten carbide powder, wherein the total carbon content in tungsten carbide powder is 5.92%.

[0075] Step 2, ball milling: using ethanol with a purity of more than 99% as the medium for wet milling, and ball milling for 48 hours, so that the particle size of the mixture is uniform, and the particle size reaches 2.5 μm;

[0076] Step 3. Drying: Dry the ball-milled mixture at a low temperature of 50-60°C, and dry it for later use;

[0077] Step 4. Add molding ...

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Abstract

The application discloses a powder metallurgy moving ring. The powder metallurgy material composition of the powder metallurgy moving ring is 0.4-0.6% of cobalt powder, 7.3%-8.5% of nickel powder, and the balance is tungsten carbide powder. The powder metallurgy moving ring provided by the application has good hot red hardness, no obvious change in performance under high temperature conditions, and good wear resistance. This application also discloses a method for preparing powder metallurgy moving rings, including mixing materials, ball milling, drying, adding molding agents, compression molding, sintering and other processes. By increasing the amount of molding agents in the mixed materials after ball milling, the A good molding effect is achieved, and the molding performance is improved, and the molding agent is removed by adopting multi-stage temperature control in the subsequent vacuum sintering process, which not only ensures the molding performance, but also removes the molding agent to avoid It affects the product properties after sintering.

Description

technical field [0001] The present application relates to the technical field of powder metallurgy materials, in particular to a powder metallurgy moving ring and a preparation method thereof. Background technique [0002] Powder metallurgy is a process technology for producing metal powder or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, forming and sintering to manufacture metal materials, composite materials and various types of products. Such as figure 1 As shown, it is an existing mechanical seal dynamic ring, which includes a ring body 81 and six inner bumps 82 integrally arranged on the inner peripheral wall of the ring and evenly distributed along the circumferential direction. Both upper and lower sides of the inner bumps 82 are provided There is a tapered surface 83 . In the prior art, it is prepared by adding powder material into the mold, then pressing and sintering, but due to the inner bump on the inner wall of the mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F5/10B22F9/04B22F1/12B22F3/02B22F3/10C22C29/08
Inventor 曲凡波刘宁嵘
Owner 宁波新宇硬质合金密封有限公司
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