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Manufacturing method for aluminum alloy air cylinder cover

A cylinder head and aluminum alloy technology, applied in the field of powder metallurgy, can solve the problems of reduced use efficiency, increased use difficulty, and immature technology, and achieve the effects of less pores, improved metallographic structure, and good wear resistance

Inactive Publication Date: 2017-11-10
SUZHOU NETABHAPE COMPOSITE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nanomaterials can meet the requirements that traditional materials cannot meet. At the same time, the application of nanomaterials can meet the special requirements for material performance in the field of metal processing. However, there are few disclosures about the application of nanomaterials in powder metallurgy technology in the prior art. and immature technology
At present, the main problem in the use of nanomaterials is the agglomeration of nanopowder particle materials, which leads to the particle agglomeration of powder particle materials due to the surface tension of particles during use, which leads to the addition of chemical decomposition agents for agglomeration during use. The decomposition of particles can be used normally, but this will increase the difficulty of use and chemical pollution, while reducing the use efficiency, which limits the application of this nanomaterial in powder metallurgy technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A method for preparing an aluminum alloy cylinder head, comprising the following steps: first weighing 50 parts of aluminum powder, 20 parts of copper powder, 10 parts of molybdenum disulfide, 10 parts of microwax powder, 4 parts of chromium powder, and 4 parts of silicon carbide by weight. 3 parts, 3 parts of diyttrium trioxide, 6 parts of nano-titanium carbide, 6 parts of tungsten silicide, 4 parts of additives, 3 parts of beryllium oxide, in which the additives are triolein, polyvinyl butyral, polydimethyl The base siloxane is composed according to the weight ratio of 6:1:2; then the above-mentioned materials are mixed, stirred at 40°C for 10 minutes, put into a mold, and pressed into a compact; then the compact is placed in a sintering furnace, under nitrogen Under the protection of the atmosphere, sinter at a rate of 10°C / min to 350°C for 2 hours; then at a rate of 10-20°C / min to 600°C for 2 hours; at a rate of 10°C / min to 780°C Sintering at low temperature for 2 h...

Embodiment 2

[0013] A method for preparing an aluminum alloy cylinder head, comprising the following steps: first weighing 60 parts of aluminum powder, 30 parts of copper powder, 15 parts of molybdenum disulfide, 20 parts of micro wax powder, 9 parts of chromium powder, and 9 parts of silicon carbide in parts by weight. 8 parts, 8 parts of diyttrium trioxide, 8 parts of nano-titanium carbide, 8 parts of tungsten silicide, 8 parts of additives, 5 parts of beryllium oxide, wherein the additives are triolein, polyvinyl butyral, polydimethyl The base siloxane is composed according to the weight ratio of 7:3:4; then the above-mentioned materials are mixed, stirred at 50°C for 15 minutes, put into a mold, and pressed into a compact; then the compact is placed in a sintering furnace, under nitrogen Under the protection of the atmosphere, sinter at a rate of 20 °C / min to 420 °C for 2 hours; then at a rate of 20 °C / min to 660 °C for 2 hours; at a rate of 20 °C / min to 880 °C for sintering 2 hours; f...

Embodiment 3

[0015] A method for preparing an aluminum alloy cylinder head, said method comprising the following steps: first weighing 55 parts of aluminum powder, 25 parts of copper powder, 13 parts of molybdenum disulfide, 15 parts of micro wax powder, 6 parts of chromium powder, 6 parts of silicon carbide, 6 parts of diyttrium trioxide, 7 parts of nano-titanium carbide, 7 parts of tungsten silicide, 6 parts of additives, 4 parts of beryllium oxide, wherein the additives are triolein, polyvinyl butyral, Polydimethylsiloxane is composed according to the weight ratio of 6.5:2:3; then the aforementioned materials are mixed, stirred at 45°C for 10-15 minutes, put into a mold, and pressed into a compact; then the compact is placed in a sintering In the furnace, under the protection of nitrogen atmosphere, sintering at a rate of 15 °C / min to 370 °C for 2 hours; then at a rate of 15 °C / min to 630 °C for 2 hours; at a rate of 15 °C / min to Sintering at 800°C for 2 hours; finally put the green com...

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PUM

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Abstract

The invention discloses a manufacturing method for an aluminum alloy air cylinder cover. The manufacturing method includes the following steps that raw materials are weighed according to weight parts, then the above materials are mixed, are stirred for 10 min to 15 min under the temperature of 40 DEG C to 50 DEG C and are then loaded into a die to be pressed into a blank; then the blank is put into a sintering furnace to be sintered under the nitrogen atmosphere shield; and finally, the pressed blank is sent into a steam treatment furnace, steam is led into the furnace for 60 min to 90 min under the condition that the temperature in the furnace ranges from 200 DEG C to 300 DEG C, and then the pressed blank is obtained through air cooling. The aluminum alloy air cylinder manufactured through the method is high in hardness and good in wear resistance, rare earth elements and nano particles are matched, the metallographic phase structure is improved, the tissue is compact, the microstructure is good, pores are very few, and the structure rigidity and hardness, the fatigue resistance and the tensile strength are good.

Description

technical field [0001] The invention belongs to the field of powder metallurgy and relates to a method for preparing an aluminum alloy cylinder head. technical background [0002] The engine is the heart of the car, and the cylinder head is an important part of the engine. Its structure is complex, and the camshaft runs directly in contact with it. high temperature. At the same time, it must also withstand the corrosion of dilute sulfuric acid formed by sulfur oxides in the fuel combustion products and water vapor, and the working conditions are harsh. Therefore, the requirements for the performance of aluminum alloy materials for the production of cylinder heads are particularly strict, not only requiring high high temperature strength and good toughness, but also requiring excellent wear resistance and corrosion resistance. Traditional casting methods and mechanical processing methods are complicated in process, poor in quality stability, expensive in materials, and un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C22C21/12C22C32/00C22C1/05B22F3/10B22F5/00
CPCC22C1/05C22C21/12C22C30/02C22C32/0005C22C32/0089B22F3/101B22F5/008B22F2999/00B22F2998/10B22F2201/02B22F2201/05B22F1/10B22F3/02
Inventor 刘晓东刘莉王爽邱晶黄明明
Owner SUZHOU NETABHAPE COMPOSITE MATERIALS
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