CN104190898A - Extrusion casting method of particle reinforced magnesium matrix composites - Google Patents
Extrusion casting method of particle reinforced magnesium matrix composites Download PDFInfo
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- CN104190898A CN104190898A CN201410483409.3A CN201410483409A CN104190898A CN 104190898 A CN104190898 A CN 104190898A CN 201410483409 A CN201410483409 A CN 201410483409A CN 104190898 A CN104190898 A CN 104190898A
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Abstract
The invention relates to an extrusion casting method of particle reinforced magnesium matrix composites. The extrusion casting method includes steps of a, weighting zinc oxide and stirring deionized water; b, weighing water glass for stirring continuously; c, weighing graphite powder to stir and obtain mold release agent in reserve; d, soaking silicon carbide by industrial alcohol and washing; e, adding the deionized water for stirring and washing and then pouring out the deionized water; f, drying and baking for reserve; g, weighing AZ91D magnesium allow to completely fuse and preserving heat at the temperature of 720 DEG C; h, pressing the silicon carbide into the AZ91D magnesium melt to stir; i, opening a mold and taking out of a sample after combing the mold and casting; j, solidly dissolving and cooling by air after heat preservation. Via extrusion and thermal treatment, tensile strength of the magnesium matrix composites is 231MPa, and ductility is 3.21%.
Description
Technical field
The present invention relates to the preparation method of magnesium base composite material, be specially a kind of extrusion casting preparation method of particle reinforced magnesium base compound material.
Background technology
Along with energy shortage, lightweight, greenization manufacture etc. is more and more paid close attention to by people, and as a kind of novel light environment protection material, magnesium alloy has caused people's attention day by day.Magnesium alloy has good specific strength, specific stiffness and damping performance, is a kind of desirable structural material, and aboundresources, thus its research, application be developed rapidly.But magnesium alloy strength is low, hardness is low, corrosion-resistant, in the application of industrial circle, be subject to significant limitation.
In order to improve these limitation of magnesium alloy, scholars both domestic and external have started the research of magnesium base composite material, by adding reinforcement to improve the combination property of magnesium alloy in magnesium alloy, main reinforcement has whisker to strengthen at present, C nanometer strengthens, accurate brilliant enhancing, fiber reinforcement etc., preparation method mainly contains stirring casting, powder metallurgy etc.For example add nonmetallic materials method, because preparation technology falls behind, cause enhancing poor effect, do not reach enhancing object.
Summary of the invention
There is the poor problem of combination property in order to solve existing magnesium base composite material preparation in the present invention, a kind of extrusion casting preparation method of particle reinforced magnesium base compound material is provided.
The present invention adopts following technical scheme to realize: a kind of extrusion casting preparation method of particle reinforced magnesium base compound material, adopts following steps to realize: a, take zinc oxide 50g, measure deionized water 415ml, add in mixing hollander and stir; B, take waterglass 10g and add mixing hollander to continue to stir into sodium base zinc oxide suspension; C, take graphite powder 25g and stir that to make releasing agent standby; D, get and strengthen granulated carbon SiClx 40g and add in beaker, after then soaking with 50ml industrial alcohol, clean, after turbid liquid is toppled over, clean after again adding 50ml industrial alcohol to soak; E, after adding deionized water 100ml agitator treating in beaker, outwell deionized water, repeatedly operate five times; F, the carborundum after washing is put into after the dry baking of quartz container standby; G, take the crucible that the pre-heat abstraction surface water of 4000gAZ91D magnesium alloy vapour is put into melting furnace, wait to be warming up to 400 ℃ and pass into protective gas, the standing 3min that removes the gred after AZ91D magnesium alloy melts completely, insulation at 720 ℃; H, by the carborundum after baking with being pressed on Aluminium Foil Package in the AZ91D magnesium alloy fused mass of insulation, stir, then that the melt after stirring is standing; After i, mould and die preheating, releasing agent is sprayed in the groove of mould, treats that AZ91D magnesium alloy fused mass is down to 680 ℃ and carries out matched moulds casting, squeeze pressure is 100MPa, and sample is taken out in pressurize 20s die sinking; J, carry out 410 ℃ of solution treatment, water-cooled after insulation, 200 ℃ of aging temps, air cooling after insulation.
The formula of releasing agent and being sprayed on mould, is beneficial to the surface of refinement mg-based material sample, improves its comprehensive mechanical property, and cutting output reduces, and saves cost; Carborundum cleans by organic matter industrial alcohol, dissolve fully and remove its surperficial impurity, improve the wetability between carborundum and magnesium alloy fused mass, and then be convenient to fuse in AZ91D magnesium alloy, overcome existing magnesium base composite material preparation and had the poor problem of combination property.
Processing step of the present invention is rationally reliable, the tensile strength of as cast condition AZ91D alloy substrate is 88MPa, percentage elongation is only 1.71%, and after extruding, heat treatment, the tensile strength of magnesium base composite material is 231MPa, and percentage elongation is 3.21%, compared with the tensile strength of as cast condition AZ91D alloy, has improved 162.5%, percentage elongation has improved 87.7%, and combination property is significantly enhanced.
The specific embodiment
An extrusion casting preparation method for particle reinforced magnesium base compound material, adopts following steps to realize: a, take zinc oxide 50g, measure deionized water 415ml, add and in mixing hollander, stir 20min; B, take waterglass 10g and add mixing hollander continue to stir 10min to become sodium base zinc oxide suspension; C, take graphite powder 25g and stir 30min to make releasing agent standby; D, get and strengthen granulated carbon SiClx 40g and add in beaker, clean after then soaking 2h with 50ml industrial alcohol, after turbid liquid is toppled over, again add 50ml industrial alcohol to soak after cleaning, after standing 1h; E, after adding deionized water 100ml agitator treating 5min in beaker, outwell deionized water, repeatedly operate five times; F, that the carborundum after washing is put into quartz container is standby after 250 ℃ of dry baking 4h; G, take 4000gAZ91D magnesium alloy and at 200 ℃ of pre-heat abstraction surface water vapour, put into the crucible of melting furnace, wait to be warming up to 400 ℃ and pass into the protective gas (mist of compressed air, carbon dioxide and HFC-134a, volume fraction is respectively 75%, 24% and 1%), the standing 3min that removes the gred after AZ91D magnesium alloy melts completely, insulation at 720 ℃; H, by the carborundum after baking with being pressed on Aluminium Foil Package in the AZ91D magnesium alloy fused mass of insulation, stir 6min, then by the standing 2min of melt after stirring; After i, mould and die preheating, releasing agent is sprayed in the groove of mould, treats that AZ91D magnesium alloy fused mass is down to 680 ℃ and carries out matched moulds casting, squeeze pressure is 100MPa, and sample is taken out in pressurize 20s die sinking; J, carry out 410 ℃ of solution treatment, water-cooled after insulation 24h, 200 ℃ of aging temps, air cooling after insulation 10h.
Claims (1)
1. an extrusion casting preparation method for particle reinforced magnesium base compound material, is characterized in that: adopt following steps to realize: a, take zinc oxide 50g, measure deionized water 415ml, add in mixing hollander and stir; B, take waterglass 10g and add mixing hollander to continue to stir into sodium base zinc oxide suspension; C, take graphite powder 25g and stir that to make releasing agent standby; D, get and strengthen granulated carbon SiClx 40g and add in beaker, after then soaking with 50ml industrial alcohol, clean, after turbid liquid is toppled over, clean after again adding 50ml industrial alcohol to soak; E, after adding deionized water 100ml agitator treating in beaker, outwell deionized water, repeatedly operate five times; F, the carborundum after washing is put into after the dry baking of quartz container standby; G, take the crucible that the pre-heat abstraction surface water of 4000gAZ91D magnesium alloy vapour is put into melting furnace, wait to be warming up to 400 ℃ and pass into protective gas, the standing 3min that removes the gred after AZ91D magnesium alloy melts completely, insulation at 720 ℃; H, by the carborundum after baking with being pressed on Aluminium Foil Package in the AZ91D magnesium alloy fused mass of insulation, stir, then that the melt after stirring is standing; After i, mould and die preheating, releasing agent is sprayed in the groove of mould, treats that AZ91D magnesium alloy fused mass is down to 680 ℃ and carries out matched moulds casting, squeeze pressure is 100MPa, and sample is taken out in pressurize 20s die sinking; J, carry out 410 ℃ of solution treatment, water-cooled after insulation, 200 ℃ of aging temps, air cooling after insulation.
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| CN201410483409.3A CN104190898A (en) | 2014-09-22 | 2014-09-22 | Extrusion casting method of particle reinforced magnesium matrix composites |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104593652A (en) * | 2015-02-06 | 2015-05-06 | 中北大学 | Quasicrystal and alumina mixed particle reinforced magnesium-based composite material and manufacturing method thereof |
| CN105886092A (en) * | 2016-02-29 | 2016-08-24 | 烟台夏鑫新材料有限公司 | Graphite demolding agent for metal forging and preparation method thereof |
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| CN104593652A (en) * | 2015-02-06 | 2015-05-06 | 中北大学 | Quasicrystal and alumina mixed particle reinforced magnesium-based composite material and manufacturing method thereof |
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| CN105886092A (en) * | 2016-02-29 | 2016-08-24 | 烟台夏鑫新材料有限公司 | Graphite demolding agent for metal forging and preparation method thereof |
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Application publication date: 20141210 |