CN102943192A - Aluminum piston manufacturing method - Google Patents
Aluminum piston manufacturing method Download PDFInfo
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- CN102943192A CN102943192A CN2012104207242A CN201210420724A CN102943192A CN 102943192 A CN102943192 A CN 102943192A CN 2012104207242 A CN2012104207242 A CN 2012104207242A CN 201210420724 A CN201210420724 A CN 201210420724A CN 102943192 A CN102943192 A CN 102943192A
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Abstract
The invention relates to an aluminum piston manufacturing method, which is characterized by comprising the following steps: (1) preparing an aluminum alloy for a piston; (2) carrying out a smelting treatment, wherein the prepared piston alloy is placed into a melting furnace to carry out melting, and the melted aluminum alloy liquid is subjected to primary refining, modification, refinement and secondary refining to provide a spare use for casting; (3) manufacturing an alumina ceramic short fiber preform; (4) preheating the alumina ceramic short fiber preform; (5) preheating a mold; (6) carrying out extrusion casting; (7) carrying out solidification piece taking; (8) carrying out a heat treatment on an aluminum piston blank; and (9) carrying out mechanical processing and a surface treatment on the aluminum piston blank to obtain the aluminum piston finished product. Compared to the aluminum piston in the prior art, the aluminum piston of the present invention has advantages of high strength and good ablation resistance.
Description
Technical field
The present invention relates to a kind of aluminium piston preparation method, this aluminium piston is mainly used in heavy-duty cargo truck, the contour reinforcement diesel engine of generating set field.
Background technology
At present, highly-intensified diesel engine is all to the development of high-power, high loading, and the aluminium piston is as the important reciprocation parts of oil engine, and its performance directly affects the Performance And Reliability of highly-intensified diesel engine.The aluminium piston is typically provided with inner-cooling oil recess in thick large part piston is cooled off, at the first ring groove location employing castingin high nickel cast iron abrasion-proof inserted ring of piston, to improve the wear resistance of first ring groove location.High reinforcing stimulus requires very high to castability with single-piece piston, do not allow to occur any casting flaw.Adopt conventional metal mold gravity casting and sand mold casting aluminium piston, be easy to produce the casting flaws such as pore, shrinkage porosite, crackle, slag inclusion, the microtexture density difference, mechanical property can not satisfy service requirements, moreover, the routine casting method, production efficiency is low, labour intensity is large.
Thus, the high piston for engine of strengthening has been done many improvement in manufacturing technology, see that the patent No. is Chinese invention patent " a kind of aluminium-based composite material for piston and preparation method thereof the " (Granted publication number: CN1257299C) of ZL02135972.5, matrix material in this patent is comprised of matrix alloy and wild phase, and the mass percent of each component is silicon 9 ~ 16% in the matrix alloy, copper 0.5 ~ 2.5, nickel 0.5 ~ 2.0, magnesium 0.2 ~ 1.5, titanium 0.2 ~ 2.0, all the other are aluminium; Wild phase is the Al that reaction in－situ generates
2O
3With the TiC particle, the products obtained therefrom strength ratio is larger.See that again the patent No. is Chinese invention patent " composite aluminium alloy for piston and production technique thereof the " (Granted publication number: CN100467644C) of ZL200710015700.8, this patent is by using old piston as the aluminium alloy major ingredient, preferential component proportion and production technique have reached cost-effective purpose.Similarly, can also be open " thermal treatment process of high-performance aluminum silicon alloy material and piston thereof " (publication number is CN101117679A) of 200710049894.3 Chinese invention patent application referring to application number.
Domestic existing piston for diesel engine adopts high nickel cast iron edge circle to strengthen in the first ring groove location usually, adopt the gravity foundry technology moulding, piston exists Heavy Weight, high nickel cast iron edge ring and aluminum substrate bonding strength low, the defectives such as the top combustion chamber Burning corrosion resistance is poor, thus cause that piston work-ing life is short, work reliability is poor.
Abroad making progress aspect the development of composite material piston, the composite material piston of Toyota Motor company development is so that Toyota Motor's overhaul mileage extends to 300,000 kilometers by 100,000 kilometers, the output rating of engine improves 5%, and the consumption of fuel oil and lubricating oil all improves.The countries such as Cummins Corp, Britain AE PLC and France, Russia, Bulgaria have all carried out the research work of composite material piston, and a large amount of uses of beginning.The external manufacturing process that adopts is that matrix material is made first at the enhancing position of piston, again by metal mold gravity casting or Extrution casting technique moulding, this technique mainly exists process period long, the shortcomings such as matrix material and body material bonding strength are high not, when adopting the Extrution casting technique moulding, can not make the limitation of the high-power engine piston of top band inner-cooling oil recess.
Summary of the invention
Technical problem to be solved by this invention be provide for the above-mentioned state of the art a kind of first ring groove location edge ring with the aluminum substrate bonding strength high and piston offend and disobey with rude remarks the good aluminium piston preparation method of ablation ability.
Another technical problem to be solved by this invention is the preparation method that a kind of good reliability, lightweight aluminium piston are provided for the above-mentioned state of the art.
The present invention solves the problems of the technologies described above the technical scheme that adopts: a kind of aluminium method for making piston is characterized in that comprising being prepared as follows processing step:
1. prepare aluminium alloys for pistons, this alloy by following component and mass percent thereof is:
2. melting is processed, piston alloy with preparation, putting into smelting furnace melts, alloy liquid carries out refining, rotten, refinement, refining treatment after the fusing, temperature of aluminum liquid is controlled to be 720 ~ 740 ℃, adopt refining agent to process, temperature of aluminum liquid is controlled to be 760 ~ 780 ℃, adopts alterant to process, and temperature of aluminum liquid is controlled to be 740 ~ 760 ℃, adopt fining agent to process, temperature of aluminum liquid is controlled to be 730 ~ 740 ℃, adopts the refining agent place to manage, after static 15 ~ 30 minutes, and temperature of aluminum liquid is controlled to be 710 ~ 720 ℃, pour into a mould;
3. alumina-ceramic staple fibre prefabricated component is made, the alumina-ceramic staple fibre is pulverized with the liquid fiber shredding unit, remove the non-fibrosis impurity such as slag ball, make first piston ring groove alumina-ceramic staple fibre prefabricated component and top combustion chamber alumina-ceramic staple fibre prefabricated component;
4. alumina-ceramic staple fibre prefabricated component preheating, the electrothermal oven that the first annular groove alumina-ceramic staple fibre prefabricated component of having prepared and top combustion chamber alumina-ceramic staple fibre prefabricated component are put into 690 ℃ ~ 710 ℃ of temperature carries out preheating;
5. mould and die preheating is preheating to 200 ℃ ~ 250 ℃ to mold cavity before the extrusion casting;
6. extrusion casting, preheated alumina-ceramic staple fibre prefabricated component is fixed on the corresponding site of mould, and prefabricated component transfer time＜30 second pour into the aluminum alloy melt of having handled well in mold cavity, the aluminum alloy melt teeming temperature is 710 ℃ ~ 720 ℃, the matched moulds pressurization;
7. solidify pickup, aluminum alloy melt is under the mechanical pressure action of 100MPa ~ 120MPa, be penetrated in the hole of the first annular groove alumina-ceramic staple fibre prefabricated component 2 and top combustion chamber alumina-ceramic staple fibre prefabricated component 3, pressurize 60S ~ 90S, after aluminum alloy melt solidifies fully, release is taken out, and can obtain the composite material piston blank of annular groove, the enhancing of combustion chamber employing ceramic fiber;
8. piston blank 1 is heat-treated, solid solution temperature is 490 ~ 500 ℃, insulation 6h, in 60 ℃ ~ 100 ℃ water, carry out quench treatment, the transfer time of piston blank from aluminium alloy quenching furnace to tank is less than 30s, the piston blank solution treatment to the holding time of ageing treatment less than 2h, aging temperature is 205 ± 5 ℃, insulation 8h, the rear air cooling of coming out of the stove;
9. piston blank spare 1 is carried out mechanical workout and surface treatment, obtain the aluminium piston finished product.
As preferably, step 2. described alterant is phosphor copper, (the perhaps microcosmic salt alterant of the model ZSABP of the blue moral high-tech industry in Sichuan company limited production), adding quality is 0.2% ~ 0.4% of aluminium alloy quality, described fining agent is al-ti-b refiner, adding quality is 0.1% ~ 0.2% of aluminium alloy quality, and described refining agent is that the model that Sichuan blue moral high-tech industry company limited produces is the JA04C aluminum refining agent, and adding quality is 0.3% ~ 0.5% of aluminium alloy quality;
As preferably, the volume fraction of alumina-ceramic staple fibre is 10% ~ 12% in the described alumina-ceramic staple fibre prefabricated component, and namely porosity is 88 ~ 90%.
Compared with prior art, the invention has the advantages that:
At first, adopt the ceramic alumina fiber reinforced aluminum matrix composites to replace traditional high nickel cast iron edge circle at the first piston ring groove position, hot strength and the thermal fatigue resistance of material have been improved, wear resistance is better than high nickel cast iron edge circle, piston loss of weight approximately 5 ~ 10%, exceed more than 5 times than high nickel cast iron edge circle with the bonding strength of piston matrix, it is very approaching that piston strengthens thermal conductivity and the piston aluminum matrix alloy at position, prevents from effectively that the first annular groove from strengthening under the effect of the stress that colds and heat succeed each other at position to cause strengthening the disengagement that the position edge encloses;
Secondly, the employing alumina-ceramic staple fibre strongthener at first piston ring groove, bowl in piston position, be prepared into the fiber preform with certain porosity, in piston extrusion casting forming technology, aluminum alloy melt under the effect of mechanical pressure to the diffusion of alumina-ceramic staple fibre prefabricated component, solidify, crystallization, local enhancement first piston ring groove position and top combustion chamber, mechanical property significantly improves;
Again, adopt the alumina-ceramic staple fibre to strengthen at position, top land combustion chamber, Effective Raise mechanical behavior under high temperature and the Burning corrosion resistance energy at this position;
Again secondly, adopt alumina-ceramic staple fibre Al
2O
3Reinforced aluminum matrix composites is compared with the conventional aluminium piston material, and linear expansivity is low, and hot strength, wear resistance and heat-resistant anti-fatigue performance are high, can strengthen the positions such as piston ring groove, bank section, top combustion chamber;
At last, by the one-time formed single-piece piston blank of Extrution casting technique, material inside organization is fine and close, and without casting flaw, mechanical property significantly improves, and process efficiency is high, low cost of manufacture.
Description of drawings
Fig. 1 is the first annular groove alumina-ceramic staple fibre preform structure schematic diagram among the embodiment 1.
Fig. 2 is top combustion chamber alumina-ceramic staple fibre preform structure schematic diagram among the embodiment 1.
Fig. 3 is the structural representation of aluminium piston after the moulding among the embodiment 1.
Embodiment
Embodiment is described in further detail the present invention below in conjunction with accompanying drawing.
Embodiment 1: aluminium piston preparation process is as follows:
1. prepare the novel piston alloying constituent, its material is comprised of following component and mass percent: Si:11.0%; Mg:0.6%; Cu:2.6%; Ni:1.8%; Fe:0.1%; Ti:0.1%; Mn:0.1%; Zn:0.1%; Cr:0.001%; Pb:0.001%; Sn:0.001%; All the other are Al;
2. with the novel piston alloy of preparing, putting into smelting furnace melts, after the fusing temperature of aluminum liquid is controlled to be 720 ℃, adopt the refining agent refining, adding quality is 0.3% of aluminium alloy, and aluminium liquid deterroration is controlled to be 760 ℃, adopts the phosphor copper alterant to process, adding quality is 0.2% of aluminium alloy quality, temperature of aluminum liquid is controlled to be 740 ℃, adopts al-ti-b refiner to process, adding quality is 0.1% of aluminium alloy quality, temperature of aluminum liquid is controlled to be 730 ℃, adopt the JA04C refining agent to process, adding quality is 0.3% of aluminium alloy quality, after static 15 minutes, and temperature of aluminum liquid is controlled to be 710 ℃, to be cast;
3. alumina-ceramic staple fibre prefabricated component is made, the alumina-ceramic staple fibre is pulverized with the liquid fiber shredding unit, remove the non-fibrosis impurity such as slag ball, make piston 1 first annular groove alumina-ceramic staple fibre prefabricated component 2 and top combustion chamber alumina-ceramic staple fibre prefabricated component 3;
4. alumina-ceramic staple fibre prefabricated component preheating, the electrothermal oven that the first annular groove alumina-ceramic staple fibre prefabricated component 2 of having prepared and top combustion chamber alumina-ceramic staple fibre prefabricated component 3 are put into 690 ℃ of temperature carries out preheating, wherein, the volume fraction of alumina-ceramic staple fibre is controlled at 10% ~ 12% in the alumina-ceramic staple fibre prefabricated component;
5. mould and die preheating is preheating to 200 ℃ to mold cavity before the extrusion casting;
6. extrusion casting is fixed on preheated alumina-ceramic staple fibre prefabricated component on the corresponding site of mould, pours into the aluminum alloy melt of having handled well 15 seconds transfer time of prefabricated component in mold cavity, and the aluminum alloy melt teeming temperature is 710 ℃, the matched moulds pressurization;
7. solidify pickup, aluminum alloy melt is under the mechanical pressure action of 100MPa, be penetrated in the hole of the first annular groove alumina-ceramic staple fibre prefabricated component 2 and top combustion chamber alumina-ceramic staple fibre prefabricated component 3, pressurize 60S, after aluminum alloy melt solidifies fully, release is taken out, and can obtain the composite material piston blank of annular groove, the enhancing of combustion chamber employing ceramic fiber;
7. piston blank is heat-treated, solid solution temperature is 495 ± 5 ℃, insulation 6h, in 60 ℃ of water, carry out quench treatment, the transfer time 15s of piston blank from aluminium alloy quenching furnace to tank, the piston blank solution treatment to the holding time of ageing treatment less than 2h, aging temperature is 205 ± 5 ℃, insulation 8h, the rear air cooling of coming out of the stove
8. piston blank spare is carried out mechanical workout and surface treatment, obtain the aluminium piston finished product.
Resulting piston in the present embodiment, concrete structure as shown in Figure 1, aluminium internal piston dense structure, without casting flaw, piston body room temperature tensile strength reaches more than the 260MPa, the first annular groove 2, top combustion chamber 3 adopt ceramic fiber to strengthen the position and detect in conjunction with good through fluorescent penetrant, and bonding strength is greater than 110MPa, and heat-resisting and wear resisting property is better than the high nickel cast iron ring-mounted piston.
Embodiment 2
1. prepare the novel piston alloying constituent, its material is comprised of following component and mass percent: Si:12.0%; Mg:0.9%; Cu:3.2%; Ni:2.3%; Fe:0.2%; Ti:0.15%; Mn:0.2%; Zn:0.2%; Cr:0.01%; Pb:0.01%; Sn:0.005%; All the other are Al;
2. with the novel piston alloy of preparing, putting into smelting furnace melts, after the fusing temperature of aluminum liquid is controlled to be 730 ℃, adopt refining agent to add the JA04C refining agent, adding quality is 0.4% of aluminium alloy, and aluminium liquid deterroration is controlled to be 770 ℃, adopts the phosphor copper alterant to process, adding quality is 0.3% of aluminium alloy quality, temperature of aluminum liquid is controlled to be 750 ℃, adopts al-ti-b refiner to process, adding quality is 0.15% of aluminium alloy quality, temperature of aluminum liquid is controlled to be 735 ℃, adopt the JA04C refining agent to process, adding quality is 0.4% of aluminium alloy quality, after static 20 minutes, and temperature of aluminum liquid is controlled to be 715 ℃, to be cast;
3. alumina-ceramic staple fibre prefabricated component is made, the alumina-ceramic staple fibre is pulverized with the liquid fiber shredding unit, remove the non-fibrosis impurity such as slag ball, make piston 1 first annular groove alumina-ceramic staple fibre prefabricated component 2 and top combustion chamber alumina-ceramic staple fibre prefabricated component 3;
4. alumina-ceramic staple fibre prefabricated component preheating, the electrothermal oven that the first annular groove alumina-ceramic staple fibre prefabricated component 2 of having prepared and top combustion chamber alumina-ceramic staple fibre prefabricated component 3 are put into 700 ℃ of temperature carries out preheating; Wherein, the volume fraction of alumina-ceramic staple fibre is controlled at 10% ~ 12% in the alumina-ceramic staple fibre prefabricated component;
5. mould and die preheating is preheating to 230 ℃ to mold cavity before the extrusion casting;
6. extrusion casting is fixed on preheated alumina-ceramic staple fibre prefabricated component on the corresponding site of mould, pours into the aluminum alloy melt of having handled well 20 seconds transfer time of prefabricated component in mold cavity, and the aluminum alloy melt teeming temperature is 715 ℃, the matched moulds pressurization;
7. solidify pickup, aluminum alloy melt is under the mechanical pressure action of 110MPa, be penetrated in the hole of the first annular groove alumina-ceramic staple fibre prefabricated component 2 and top combustion chamber alumina-ceramic staple fibre prefabricated component 3, pressurize 70S, after aluminum alloy melt solidifies fully, release is taken out, and can obtain the composite material piston blank of annular groove, the enhancing of combustion chamber employing ceramic fiber;
7. piston blank is heat-treated, solid solution temperature is 495 ± 5 ℃, insulation 6h, in 60 ℃ of water, carry out quench treatment, the transfer time 20s of piston blank from aluminium alloy quenching furnace to tank, the piston blank solution treatment to the holding time of ageing treatment less than 2h, aging temperature is 205 ± 5 ℃, insulation 8h, the rear air cooling of coming out of the stove;
8. piston blank spare is carried out mechanical workout and surface treatment, obtain the aluminium piston finished product.
Resulting aluminium internal piston dense structure in the present embodiment, without casting flaw, piston body room temperature tensile strength reaches more than the 265MPa, annular groove, combustion chamber are adopted ceramic fiber to strengthen the position and are detected in conjunction with good through fluorescent penetrant, bonding strength is greater than 115MPa, and heat-resisting and wear resisting property is better than the high nickel cast iron ring-mounted piston.
Embodiment 3:
1. prepare the novel piston alloying constituent, its material is comprised of following component and mass percent: Si:13.0%; Mg:1.2%; Cu:4.0%; Ni:2.8%; Fe:0.3%; Ti:0.2%; Mn:0.3%; Zn:0.3%; Cr:0.05%; Pb:0.05%; Sn:0.01%; All the other are Al;
2. with the novel piston alloy of preparing, putting into smelting furnace melts, after the fusing temperature of aluminum liquid is controlled to be 740 ℃, adopt refining agent to add the JA04C refining agent, adding quality is 0.5% of aluminium alloy, and aluminium liquid deterroration is controlled to be 780 ℃, adopts the phosphor copper alterant to process, adding quality is 0.4% of aluminium alloy quality, temperature of aluminum liquid is controlled to be 760 ℃, adopts al-ti-b refiner to process, adding quality is 0.2% of aluminium alloy quality, temperature of aluminum liquid is controlled to be 740 ℃, adopt the JA04C refining agent to process, adding quality is 0.5% of aluminium alloy quality, after static 20 minutes, and temperature of aluminum liquid is controlled to be 720 ℃, to be cast;
3. alumina-ceramic staple fibre prefabricated component is made, the alumina-ceramic staple fibre is pulverized with the liquid fiber shredding unit, remove the non-fibrosis impurity such as slag ball, make piston 1 first annular groove alumina-ceramic staple fibre prefabricated component 2 and top combustion chamber alumina-ceramic staple fibre prefabricated component 3;
4. alumina-ceramic staple fibre prefabricated component preheating, the electrothermal oven that the first annular groove alumina-ceramic staple fibre prefabricated component 2 of having prepared and top combustion chamber alumina-ceramic staple fibre prefabricated component 3 are put into 710 ℃ of temperature carries out preheating; Wherein, the volume fraction of alumina-ceramic staple fibre is controlled at 10% ~ 12% in the alumina-ceramic staple fibre prefabricated component;
5. mould and die preheating is preheating to 250 ℃ to mold cavity before the extrusion casting;
6. extrusion casting is fixed on preheated alumina-ceramic staple fibre prefabricated component on the corresponding site of mould, pours into the aluminum alloy melt of having handled well 20 seconds transfer time of prefabricated component in mold cavity, and the aluminum alloy melt teeming temperature is 720 ℃, the matched moulds pressurization;
7. solidify pickup, aluminum alloy melt is under the mechanical pressure action of 120MPa, be penetrated in the hole of the first annular groove alumina-ceramic staple fibre prefabricated component 2 and top combustion chamber alumina-ceramic staple fibre prefabricated component 3, pressurize 90S, after aluminum alloy melt solidifies fully, release is taken out, and can obtain the composite material piston blank of annular groove, the enhancing of combustion chamber employing ceramic fiber;
7. piston blank is heat-treated, solid solution temperature is 495 ± 5 ℃, insulation 6h, in 60 ℃ of water, carry out quench treatment, the transfer time 30s of piston blank from aluminium alloy quenching furnace to tank, the piston blank solution treatment to the holding time of ageing treatment less than 2h, aging temperature is 205 ± 5 ℃, insulation 8h, the rear air cooling of coming out of the stove;
8. piston blank spare is carried out mechanical workout and surface treatment, obtain the aluminium piston finished product.
Resulting aluminium internal piston dense structure in the present embodiment, without casting flaw, piston body room temperature tensile strength reaches more than the 260MPa, annular groove, combustion chamber are adopted ceramic fiber to strengthen the position and are detected in conjunction with good through fluorescent penetrant, bonding strength is greater than 105MPa, and heat-resisting and wear resisting property is better than the high nickel cast iron ring-mounted piston.
Claims (7)
1. an aluminium piston preparation method is characterized in that comprising the steps:
1. prepare aluminium alloys for pistons, this alloy by following component and mass percent thereof is:
Si 11.0%~13.0%；
Mg 0.6%~1.2%；
Cu 2.6%~4.0%；
Ni 1.8%~2.8%；
Fe 0.1%~0.3%；
Ti 0.1%~0.2%；
Mn 0.01%~0.3%；
Zn 0.01%~0.3%；
Cr 0.001%~0.05%；
Pb 0.001%~0.05%；
Sn 0.001%~0.01%；
All the other are Al;
2. melting is processed, and with the piston alloy of preparation, puts into smelting furnace and melts, and after the fusing aluminum alloy melt is carried out initial refining, rotten, refinement, secondary refining and processes, and is to be cast;
3. alumina-ceramic staple fibre prefabricated component is made, alumina-ceramic staple fibre prefabricated component comprises the first annular groove alumina-ceramic staple fibre prefabricated component and top combustion chamber alumina-ceramic staple fibre prefabricated component, the alumina-ceramic staple fibre is pulverized with the liquid fiber shredding unit, remove non-fibrosis impurity, make first piston ring groove alumina-ceramic staple fibre prefabricated component and top combustion chamber alumina-ceramic staple fibre prefabricated component;
4. alumina-ceramic staple fibre prefabricated component preheating, the electrothermal oven of the alumina-ceramic staple fibre prefabricated component that has prepared being put into 690 ℃ ~ 710 ℃ of temperature carries out preheating;
5. mould and die preheating is preheating to 200 ℃ ~ 250 ℃ to mold cavity before the extrusion casting;
6. extrusion casting is fixed on preheated alumina-ceramic staple fibre prefabricated component on the corresponding site of mould, pours into the aluminum alloy melt of having handled well in mold cavity, and the aluminum alloy melt teeming temperature is 710 ℃ ~ 720 ℃, the matched moulds pressurization;
7. solidify pickup, aluminum alloy melt is under the mechanical pressure action of 100MPa ~ 120MPa, be penetrated in the hole of the first annular groove alumina-ceramic staple fibre prefabricated component and top combustion chamber alumina-ceramic staple fibre prefabricated component, pressurize 60S ~ 90S, after aluminum alloy melt solidifies fully, release is taken out, and namely gets aluminum piston blank;
8. aluminum piston blank is heat-treated;
9. aluminum piston blank spare is carried out mechanical workout and surface treatment, obtain the aluminium piston finished product.
2. aluminium piston preparation method according to claim 1, it is characterized in that step 2. melting process as follows: the aluminum alloy melt temperature is controlled to be 720 ~ 740 ℃, adopts refining agent to carry out initial refining and process; Temperature of aluminum liquid is controlled to be 760 ~ 780 ℃, adopts the alterant processing of going bad; The aluminum alloy melt temperature is controlled to be 740 ~ 760 ℃, adopts fining agent to carry out thinning processing; The aluminum alloy melt temperature is controlled to be 730 ~ 740 ℃, adopts the refining agent place to carry out secondary refining and process, after static 15 ~ 30 minutes, and the aluminum alloy melt temperature is controlled to be 710 ~ 720 ℃, to be cast.
3. aluminium piston preparation method according to claim 2 is characterized in that described alterant is phosphor copper, and the alterant addition is 0.2 ~ 0.4% of aluminium alloy quality.
4. aluminium piston preparation method according to claim 2 is characterized in that described fining agent is al-ti-b refiner, and the fining agent addition is 0.1 ~ 0.2% of aluminium alloy quality.
5. aluminium piston preparation method according to claim 2 is characterized in that described refining agent is that the model that Sichuan blue moral high-tech industry company limited produces is the JA04C aluminum refining agent, and the refining agent addition is 0.3 ~ 0.5% of aluminium alloy quality.
6. aluminium piston preparation method according to claim 1 is characterized in that the volume fraction of alumina-ceramic staple fibre in the described alumina-ceramic staple fibre prefabricated component is 10% ~ 12%.
7. aluminium piston preparation method according to claim 1,8. middle heat-treat condition is as follows to it is characterized in that step: solid solution temperature is 490 ~ 500 ℃, insulation 5.5-6.5h, in 60 ℃ ~ 100 ℃ water, carry out quench treatment, the transfer time of piston blank from aluminium alloy quenching furnace to tank is less than 30s, the piston blank solution treatment to the holding time of ageing treatment less than 2h, aging temperature is 200 ~ 210 ℃, insulation 7.5-8.5h, the rear air cooling of coming out of the stove.
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| CN114807687A (en) * | 2022-04-11 | 2022-07-29 | 潍柴动力股份有限公司 | Aluminum alloy micro powder, insert ring containing aluminum alloy micro powder and piston containing insert ring |
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| CN112648104B (en) * | 2020-12-07 | 2022-07-19 | 中国兵器科学研究院宁波分院 | Whisker reinforced aluminum alloy piston and preparation method thereof |
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| CN111408913A (en) * | 2020-03-12 | 2020-07-14 | 中国兵器科学研究院宁波分院 | Remelting strengthening preparation method for throat part of aluminum piston |
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