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Powder metallurgy flange and preparation method thereof

A powder metallurgy and flange technology, applied in the field of powder metallurgy flanges and preparation, can solve the problems of loose alloy structure, low tensile strength, lower production costs, etc., and achieve the effect of uniform structure and high air tightness

Inactive Publication Date: 2013-04-03
NINGBO QUNXING POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the flanges are produced by casting process, only a small part of the flanges are processed by machining, and the machining procedures are complicated
[0003] The cast flange has the following defects in processing and use. The tensile strength of the cast iron alloy is lower than that of steel. The internal structure of the alloy is loose and the airtightness is not high. On the other hand, there are sand holes and pores in the cast flange, which cannot be used under high pressure, otherwise there will be leakage
[0004] The use of steel to produce flanges requires multiple processes to complete, and a large amount of waste is generated, and the production efficiency is low, which is not conducive to reducing production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] Described preparation method is:

[0023] The ingredients include 0.5-1.5% copper, 0.3-0.5% chromium, 0.3-0.5% silicon, 0.5-0.8% graphite, 0.3-0.8% manganese, 0.8-1.0% hard Zinc fatty acid, 0.5-1.0% ferrophosphorus powder, and the balance is iron; and select or process each of the above components into powder, the best choice is that the particle size of each powder is not more than 100 microns; the calculated above each powder Mix in a mixer for 30-60 minutes;

[0024] Pressing, pressing the mixed powder under a pressure of 550-600MPa for 10-30 seconds to make a compact;

[0025] Sintering, sintering the compact at 1100-1150°C, then cooling down to 130-150°C;

[0026] Tempering, the above-mentioned cooled billet is heated to 180-200°C in the tempering furnace, and it is kept warm for 1-3 hours before processing;

[0027] Refining, refining the tempered blank according to the required size, and then performing post-processing to obtain the finished product.

[0028]...

Embodiment 1

[0031] A powder metallurgy flange, its composition includes by weight percentage, 0.5% copper, 0.3% chromium, 0.3% silicon, 0.5% graphite, 0.3% manganese, 0.8% zinc stearate, 0.5% The ferrophosphorus powder, the balance is iron; wherein the content of phosphorus in the ferrophosphorus powder is 5% by weight.

[0032] Described preparation method is:

[0033] Ingredients, selected by weight percentage, include 0.5% copper, 0.3% chromium, 0.3% silicon, 0.5% graphite, 0.3% manganese, 0.8% zinc stearate, 0.5% ferrophosphorus powder, and The amount is iron; wherein the content of phosphorus in the iron phosphorus powder is 5% by weight; and select or process the above-mentioned components into powder, in the present embodiment, it is powdery by purchasing materials; the best choice is each powder The particle size is not more than 100 microns; mix the calculated above-mentioned powders in a mixer for 30 minutes;

[0034] Pressing, pressing the mixed powder under a pressure of 550...

Embodiment 2

[0039] A powder metallurgy flange, its composition includes by weight percentage, 1.5% copper, 0.5% chromium, 0.5% silicon, 0.8% graphite, 0.8% manganese, 1.0% zinc stearate, 1.0% The ferrophosphorus powder, the balance is iron; wherein the content of phosphorus in the ferrophosphorus powder is 5% by weight.

[0040] Described preparation method is:

[0041] The ingredients include 1.5% copper, 0.5% chromium, 0.5% silicon, 0.8% graphite, 0.8% manganese, 1.0% zinc stearate, 1.0% ferrophosphorus powder, and 1.0% zinc stearate. The amount is iron; wherein the content of phosphorus in the iron phosphorus powder is 5% by weight; and select or process the above-mentioned components into powder, in the present embodiment, it is powdery by purchasing materials; the best choice is each powder The particle size of the powder does not exceed 100 microns; mix the calculated above-mentioned powders in a mixer for 60 minutes;

[0042] Pressing, pressing the mixed powder under a pressure o...

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PUM

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Abstract

The invention relates to a powder metallurgy flange and a preparation method thereof. The powder metallurgy flange comprises the following components in percentage by weight: 0.5-1.5% of copper, 0.3-0.5% of chromium, 0.3-0.5% of silicon, 0.5-0.8% of graphite, 0.3-0.8% of manganese, 0.8-1.0% of zinc stearate, 0.5-1.0% of ferrophosphorus powder, and the balance of iron. According to different needs, the components of the material are adjusted, so that the produced flange has high tensile strength, high gas tightness and a uniform organization structure, and can be extensively adaptive to various environments.

Description

technical field [0001] The invention belongs to the field of powder metallurgy, in particular to a powder metallurgy flange and a preparation method. Background technique [0002] At present, most of the flanges are produced by casting process, and only a small part of the flanges are produced by machining, and the machining procedures are complicated. [0003] The cast flange has the following defects in processing and use. The tensile strength of the cast iron alloy is lower than that of steel. The internal structure of the alloy is loose and the airtightness is not high. On the other hand, there are sand holes and pores in the cast flange, which cannot be used under high pressure, otherwise there will be leakage. [0004] The use of steel to produce flanges requires multiple processes to complete, and a large amount of waste is generated, and the production efficiency is low, which is not conducive to reducing production costs. Contents of the invention [0005] The p...

Claims

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Application Information

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IPC IPC(8): C22C38/20B22F3/16B22F5/00
Inventor 潘成群
Owner NINGBO QUNXING POWDER METALLURGY
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