CN107858562A - Engine cylinder block aluminium alloy and preparation method thereof - Google Patents
Engine cylinder block aluminium alloy and preparation method thereof Download PDFInfo
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- CN107858562A CN107858562A CN201711164515.5A CN201711164515A CN107858562A CN 107858562 A CN107858562 A CN 107858562A CN 201711164515 A CN201711164515 A CN 201711164515A CN 107858562 A CN107858562 A CN 107858562A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/05—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
Abstract
The invention discloses a kind of intensity height, the engine cylinder block aluminium alloy of good corrosion resistance, it is characterized in that each element mass percent is：Mg：3.8~4.4 wt. ﹪；Si：4.0~4.8 wt. ﹪；Cu：0.25~0.85 wt. ﹪；Mn：0.35~0.55 wt. ﹪；Cr：0.25~0.35 wt. ﹪；Zr：0.35~0.4 wt. ﹪；Ti：0.2~0.3 wt. ﹪；Sr：0.02~0.06 wt. ﹪；Ag：0.3~0.45 wt. ﹪, Fe：0.05~0.1 wt. ﹪, other impurity are single≤0.02 wt. ﹪, summation≤0.1wt. ﹪, surplus is aluminium；Its preparation method includes the steps such as alloy melting, Homogenization Treatments, heat treatment；The cylinder block intensity of aluminum alloy of preparation is high, corrosion-resistant, and heat endurance is high, suitable for the harsh working environment of engine cylinder block.
Description
Technical field
The present invention relates to a kind of aluminium alloy and production method, specifically a kind of engine cylinder block aluminium alloy and its
Preparation method, more particularly to a kind of intensity is high, engine cylinder block aluminium alloy of good corrosion resistance and preparation method thereof.
Background technology
With the high speed development of auto industry, the generation of the energy, safety and public hazards three major issues is also brought.Therefore,
In automobile production, have started to step up use ratio of the high-performance light material on vehicle.Aluminium alloy is because excellent
Mechanical property, wearability and corrosion resistance, the use on vehicle is more and more extensive, has been successfully applied to wheel, gearbox, hair
The parts such as motivation.Wherein, the engine as vehicle core component, have started to develop to high power density, lightweight direction.But
It is that because engine cylinder cover structure is complicated, cylinder body directly contacts engine cylinder-body with combustion chamber, need to bear the machine of HTHP repeatedly
The presence of tool and thermic load, in addition sulfide so that cylinder block material needs possess higher intensity, excellent under high-temperature medium
The performance such as heat-resisting and corrosion-resistant.And existing aluminium alloy is difficult to meet in high temperature environments, what intensity and corrosion resistance improved simultaneously
Demand.
Therefore, document 1：The A of Publication No. CN 105543585, a kind of entitled engine body are closed with die casting aluminium
Gold and its production method and document 2：The A of Publication No. CN 101949337, entitled high silicon rare earth aluminium alloy car engine
The patent of invention of machine cylinder body by adding a large amount of Cu, meanwhile, add a small amount of trace element to improve the mechanical property of aluminium alloy, but
It is that the above method easily causes the decay resistance of aluminium alloy drastically to decline.
Document 3：The A of Publication No. CN 103540812, a kind of entitled Aluminum alloy material for engine cylinder cover and its
Preparation method and document 4：Publication No. CN 1809647A, the patent of invention of entitled aluminum alloy for engine blocks are led to
It is the low magnesium of high silicon to cross aluminium alloy proportion design, and introduces a small amount of Fe and Cu elements, improves the mechanical property of aluminium alloy, but
It is a large amount of elementary silicons generally be present in aluminum alloy materials obtained by the above method, influence the properties of product of aluminium alloy, make product quality
It cannot be guaranteed.
Document 5：The A of Publication No. CN 104674081, entitled aluminum alloy for engine blocks material and its preparation
Method of the patent of invention of method by adding a large amount of Fe elements, there is provided a kind of high aluminum alloy materials of thermal conductivity factor, still, should
Method have ignored a large amount of presence of rich Fe phases in aluminum alloy materials, easily cause cylinder body to corrode in advance under high temperature, hyperbaric environment
With aging, it is difficult to meet life of product requirement, be unfavorable for the extension of production life cycle.
Therefore, rational element is with when micro- introducing, to improve the intensity of aluminium alloy, corrosion resistance, high temperature
Stability, and then performance and the life-span of the parts such as the aluminium alloy cylinder applied to engine, cylinder jacket are improved, turn into ability
The technical problem that field technique personnel letter need to solve.
The content of the invention
It is an object of the invention to provide a kind of intensity height, the engine cylinder block aluminium alloy of good corrosion resistance and its preparation
Method.
The present invention, which adopts the following technical scheme that, realizes its goal of the invention, a kind of engine cylinder block aluminium alloy, respectively
Element mass percent is：Mg：3.8~4.4 wt. ﹪；Si：4.0~4.8 wt. ﹪；Cu：0.25~0.85 wt. ﹪；Mn：
0.35~0.55 wt. ﹪；Cr：0.25~0.35 wt. ﹪；Zr：0.35~0.4 wt. ﹪；Ti：0.2~0.3 wt. ﹪；
Sr：0.02~0.06 wt. ﹪；Ag：0.3~0.45 wt. ﹪, Fe：0.05~0.1 wt. ﹪, other impurity are single≤and 0.02
Wt. ﹪, summation≤0.1wt. ﹪, surplus is aluminium.
A kind of preparation method of engine cylinder block aluminium alloy as described above, it comprises the following steps：
(1) smelting furnace temperature is warming up to 750~760 DEG C, meanwhile, it is passed through the inert protective gas after preheating from furnace bottom；
The present invention step (1) in, the temperature after inert protective gas preheating is 450 DEG C.
(2) aluminium block is first added into smelting furnace by proportioning, when aluminium block melts 50 ﹪, add coverture, then added by proportioning
Ag, Al-Mn intermediate alloy, Al-Si intermediate alloys, Al-Cu intermediate alloys, Al-Fe intermediate alloys, Al-Zr intermediate alloys, Al-
Sr intermediate alloys, Al-Cr intermediate alloys, treat that all fusing adds the Mg blocks coated by aluminium foil to above-mentioned intermediate alloy afterwards；
The present invention step (2) in, raw material launch when, indoor relative humidity control in 40 below ﹪.
(3) treat that furnace charge all melts, after stirring and standing 10min, be cooled to 720~740 DEG C；Then, will be by the total matter of proportioning
Measure 0.6 ﹪ C2Cl6Add in melt, extremely emerged without yellow gas in three times；
(4) claw bath surface oxidizing slag, add Al-Ti intermediate alloys, it is agitated, 15min is stood, then, it is cooled to 710~
720 DEG C, moulding by casting obtains cylinder block casting in water cooled mo(u)ld；
(5) the cylinder block casting (4) obtained to step is first warming up to 300~350 DEG C, is incubated 10~15h, then be warming up to 490~520
DEG C, 12~15h is incubated, it is then cooled to room temperature；
(6) 500~520 DEG C are heated to (5) cylinder block casting that step obtains, is incubated 6~12h, then, water quenching to room temperature；It will quench
Ingot casting after fire is put into 150~160 DEG C of stove, 6~10h of timeliness.
The present invention step (6) in, during water quenching, quenching shift time is not more than 25s.
Due to preferably realizing goal of the invention using above-mentioned technical proposal, the present invention, being matched somebody with somebody by optimized alloy element
Than and Technology for Heating Processing, improve ag(e)ing process in high temperature resistant hardening constituent separate out density, control alloy Grain Boundary Precipitates density, improve
The mechanical property of aluminium alloy, decay resistance and resistance to elevated temperatures；Increase keeps the diffusion-type of symbiosis and epibiosis to strengthen with matrix
Phase；Meanwhile the addition of rare earth element, the radial rare earth compound of good thermal stability can be formed in grain boundaries, strengthens crystal boundary,
The high-temperature behavior of alloy is improved, is advantageous to the extension of operation life of engine cylinder during use；The cylinder block aluminium of preparation
Alloy is not on the premise of proportion is increased, room temperature tensile intensity 350MPa or so, 300 DEG C of Testing Tensile Strength at Elevated Temperature 190MPa or so,
Thermal conductivity factor 260W/ (mK) left and right, intercrystalline corrosion 1~2, Peeling Corrosion N, suitable for the harsh work of engine cylinder block
Environment.
Brief description of the drawings
Fig. 1 is the cylinder block aluminium alloy edge prepared by the embodiment of the present invention 1<001>AlDirection TEM bright field images；
Fig. 2 is cylinder block TEM bright field images near aluminium alloy crystal boundary prepared by the embodiment of the present invention 1；
Fig. 3 is the cylinder block aluminium alloy edge prepared by the embodiment of the present invention 2<001>AlDirection TEM bright field images；
Fig. 4 is cylinder block TEM bright field images near aluminium alloy crystal boundary prepared by the embodiment of the present invention 2；
Fig. 5 is the cylinder block aluminium alloy edge prepared by the embodiment of the present invention 3<001>AlDirection TEM bright field images；
Fig. 6 is cylinder block TEM bright field images near aluminium alloy crystal boundary prepared by the embodiment of the present invention 3.
Embodiment
Embodiment 1：
A kind of engine cylinder block aluminium alloy, each element mass percent are：Mg：3.8~4.4 wt. ﹪；Si：4.0~
4.8 wt. ﹪；Cu：0.25~0.85 wt. ﹪；Mn：0.35~0.55 wt. ﹪；Cr：0.25~0.35 wt. ﹪；Zr：0.35
~0.4 wt. ﹪；Ti：0.2~0.3 wt. ﹪；Sr：0.02~0.06 wt. ﹪；Ag：0.3~0.45 wt. ﹪, Fe：0.05
~0.1 wt. ﹪, other impurity are single≤0.02 wt. ﹪, summation≤0.1wt. ﹪, surplus is aluminium.
Si elements are seldom added in matrix, are mainly existed in the alloy in the form of Eutectic Silicon in Al-Si Cast Alloys, and high-temperature stability is preferable；
Under the casting of the present invention and heat treatment condition, minimal amount of Cu contents, the intensity of alloy at a room temperature and a high temperature can be improved, and
And ɑ phases can distinguish copper-rich phase and Si forms two-phase eutectic, while three-phase eutectic can be collectively formed again, strengthen the high temperature of cylinder body
Performance；Appropriate Mg elements can improve alloy strength, hardness, reduce sticking to mould tendency, make the surface of die casting smooth, avoid cylinder body
There is the phenomenon damaged in the demoulding.Fe elements can form Al-Si-Fe systems partial crystallization thing with silicon and aluminium, contribute to it is dispersion-strengthened, together
When reduce sticking to mould.But if the too high levels of ferro element, then unfavorable shadow can be produced to the mechanical performance and heat conductivility of alloy
Ring.Iron content is Fe in the present invention：0.05~0.1 wt.%, i.e., it can ensure the high intensity of alloy, and can, which improves, starts
The heat dispersion of machine cylinder body, reduce the frequency of maintenance of engine；Mn elements can prevent the recrystallization of engine cylinder-body aluminium alloy
Journey, recrystallization temperature is improved, refine recrystal grain, be advantageous to the lifting of the heat dispersion of aluminium alloy, can also neutralize in addition more
Remaining iron, form (Fe, Mn) Al6；The addition of a small amount of Sr elements can substantially reduce the hydrogen content and pin hole rate of alloy, lifting
The heat dispersion of engine cylinder-body, tensile strength, hardness and plasticity of the aluminium alloy of engine cylinder-body etc. are effectively improved, extended
The service life of engine, but when content is higher, alloy plasticity can be caused to reduce, so in the present invention, preferable Sr contents are
0.03~0.06 wt. ﹪.
A kind of preparation method of engine cylinder block aluminium alloy as described above, it comprises the following steps：
(1) smelting furnace temperature is warming up to 750~760 DEG C, meanwhile, it is passed through the inert protective gas after preheating from furnace bottom；
The present invention step (1) in, the temperature after inert protective gas preheating is 450 DEG C.
(2) aluminium block is first added into smelting furnace by proportioning, when aluminium block melts 50 ﹪, add coverture, then added by proportioning
Ag, Al-Mn intermediate alloy, Al-Si intermediate alloys, Al-Cu intermediate alloys, Al-Fe intermediate alloys, Al-Zr intermediate alloys, Al-
Sr intermediate alloys, Al-Cr intermediate alloys, treat that all fusing adds the Mg blocks coated by aluminium foil to above-mentioned intermediate alloy afterwards；
The present invention step (2) in, raw material launch when, indoor relative humidity control in 40 below ﹪.
(3) treat that furnace charge all melts, after stirring and standing 10min, be cooled to 720~740 DEG C；Then, will be by the total matter of proportioning
Measure 0.6 ﹪ C2Cl6Add in melt, extremely emerged without yellow gas in three times；
(4) claw bath surface oxidizing slag, add Al-Ti intermediate alloys, it is agitated, 15min is stood, then, it is cooled to 710~
720 DEG C, moulding by casting obtains cylinder block casting in water cooled mo(u)ld；
(5) the cylinder block casting (4) obtained to step is first warming up to 300~350 DEG C, is incubated 10~15h, then be warming up to 490~520
DEG C, 12~15h is incubated, it is then cooled to room temperature；
(6) 500~520 DEG C are heated to (5) cylinder block casting that step obtains, is incubated 6~12h, then, water quenching to room temperature；It will quench
Ingot casting after fire is put into 150~160 DEG C of stove, 6~10h of timeliness.
The present invention step (6) in, during water quenching, quenching shift time is not more than 25s.
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
A kind of engine cylinder block aluminium alloy, raw material, 4.4 wt. ﹪ Mg are weighed according to following mass percent；4.8
Wt. ﹪ Si；0.45wt. ﹪ Cu；0.55 wt. ﹪ Mn；0.3 wt. ﹪ Cr；0.35 wt. ﹪ Zr；0.3
Wt. ﹪ Ti；0.06 wt. ﹪ Sr；0.3 wt. ﹪ Ag, 0.05 wt. ﹪ Fe；Other impurity are single≤and 0.02
Wt. ﹪, the wt. ﹪ of summation≤0.1, surplus is aluminium.
The preparation method of the present invention includes proportionally being equipped with above-mentioned various raw materials, and smelting furnace temperature is warming up into 750~760 DEG C
Melting is carried out, meanwhile, for anti-oxidation, the inert protective gas helium after preheating is passed through from furnace bottom, the inertia after preheating is protected
It is 450 DEG C to protect gas temperature；When feeding intake, indoor relative humidity is strict controlled in 40 below ﹪；First, aluminium is added into smelting furnace,
When aluminium block melts 50 ﹪, add coverture, coverture composition according to RJ2-1 national sector standards in YS/T 491-2005,
Then add Ag and Al-Mn intermediate alloys, Al-Si intermediate alloys, Al-Cu intermediate alloys, Al-Fe intermediate alloys, among Al-Zr
Alloy, Al-Sr intermediate alloys, Al-Cr intermediate alloys, treat the above-mentioned intermediate alloy Mg that all fusing coats afterwards plus with aluminium foil
Block, when the relatively low metal instantaneous touch of the fusing point melt higher than itself fusing point, the low melting point element that adds afterwards can rapidly,
Equably disperse reduces the generation of bubble among the melt of mixing, and aluminium alloy made from guarantee has good rigidity and prolonged
Malleability.Treat that furnace charge all melts, stir and stand 10min, then, be cooled to 737 DEG C, be incorporated as matching in three times into melt
The ﹪ of gross mass 0.6 C2Cl6, to being emerged without yellow gas, remove the H in melt2Gas, the stomata in aluminium alloy is reduced, improved
Wear-resisting, the decay resistance of aluminium alloy；Bath surface oxidizing slag is clawed afterwards, adds Al-Ti intermediate alloys, agitated and standing
15min, then, 713 DEG C are cooled to, the moulding by casting in water cooled mo(u)ld, obtain cylinder block casting.Cylinder block casting is warming up to 330 DEG C, protected
Warm 12h carries out Homogenization Treatments, then is warming up to 514 DEG C, 13h is incubated, it is then cooled to room temperature.By the cylinder after Homogenization Treatments
Body casting is warming up to 520 DEG C, is incubated 6h, then, water quenching to room temperature, wherein quenching shift time are not more than 25s；Finally, will quench
Cylinder block casting after fire is put into 155 DEG C of stove, and cylinder block aluminium alloy is made in timeliness 8h.
As seen from Figure 1, Figure 2, alloy strengthening phase size is tiny, and density is big, meanwhile, alloy crystal boundary is without bright no Precipitation
Band, be advantageous to the raising of alloy macro-mechanical property and decay resistance.
The above method can be additionally used in the manufacture of the parts such as the framework of engine, oil cylinder.
Embodiment 2：
A kind of engine cylinder block aluminium alloy, raw material, 4.2wt. ﹪ Mg are weighed according to following mass percent；4.5
Wt. ﹪ Si；0.55wt. ﹪ Cu；0.45 wt. ﹪ Mn；0.25 wt. ﹪ Cr；0.40 wt. ﹪ Zr；0.28
Wt. ﹪ Ti；0.05 wt. ﹪ Sr；0.35 wt. ﹪ Ag；0.08 wt. ﹪ Fe；Other impurity are single≤and 0.02
Wt. ﹪, the wt. ﹪ of summation≤0.1, surplus is aluminium.
The preparation method of the present invention includes proportionally being equipped with above-mentioned various raw materials, and smelting furnace temperature is warming up into 755 DEG C of progress
Melting, meanwhile, for anti-oxidation, the inert protective gas helium after preheating is passed through from furnace bottom, the inertia protection gas after preheating
Temperature is 450 DEG C；When feeding intake, indoor relative humidity is strict controlled in 40 below ﹪；First, aluminium is added into smelting furnace, treats aluminium
When block melts 50 ﹪, coverture is added, coverture composition is according to RJ2-1 national sector standards in YS/T 491-2005, then
Add Ag and Al-Mn intermediate alloys, Al-Si intermediate alloys, Al-Cu intermediate alloys, Al-Fe intermediate alloys, the conjunction of Al-Zr centres
Gold, Al-Sr intermediate alloys, Al-Cr intermediate alloys, treat the above-mentioned intermediate alloy Mg blocks that all fusing coats afterwards plus with aluminium foil；
When the relatively low metal instantaneous touch of the fusing point melt higher than itself fusing point, the low melting point element added afterwards can rapidly,
The disperse of even ground reduces the generation of bubble among the melt of mixing, and aluminium alloy made from guarantee has good rigidity and extension
Property.Treat that furnace charge all melts, stir and stand 10min, then, be cooled to 735 DEG C, it is total to be incorporated as proportioning in three times into melt
The ﹪ of quality 0.6 C2Cl6, to being emerged without yellow gas, remove the H in melt2Gas, the stomata in aluminium alloy is reduced, improve aluminium
Wear-resisting, the decay resistance of alloy；Bath surface oxidizing slag is clawed afterwards, adds Al-Ti intermediate alloys, agitated and standing
15min, then, 715 DEG C are cooled to, the moulding by casting in water cooled mo(u)ld, obtain cylinder block casting.Cylinder block casting is warming up to 320 DEG C, protected
Warm 11h carries out Homogenization Treatments, then is warming up to 495 DEG C, 13h is incubated, it is then cooled to room temperature.By the cylinder after Homogenization Treatments
Body casting is warming up to 510 DEG C, is incubated 9h, then, water quenching to room temperature, wherein quenching shift time are not more than 25s；Finally, will quench
Cylinder block casting after fire is put into 160 DEG C of stove, and cylinder block aluminium alloy is made in timeliness 8h.
From Fig. 3, Fig. 4, alloy strengthening phase size is tiny, and density is big, meanwhile, alloy crystal boundary is without bright no Precipitation
Band, be advantageous to the raising of alloy macro-mechanical property and decay resistance.
Remaining same embodiment 1.
Embodiment 3：
A kind of engine cylinder block aluminium alloy, raw material, 4.2wt. ﹪ Mg are weighed according to following mass percent；4.3
Wt. ﹪ Si；0.6wt. ﹪ Cu；0.5 wt. ﹪ Mn；0.28 wt. ﹪ Cr；0.4wt. ﹪ Zr；0.29 wt. ﹪
Ti；0.03 wt. ﹪ Sr；0.40 wt. ﹪ Ag, 0.09 wt. ﹪ Fe；Other impurity are single≤0.02 wt. ﹪,
The wt. ﹪ of summation≤0.1, surplus is aluminium.
The preparation method of the present invention includes proportionally being equipped with above-mentioned various raw materials, and smelting furnace temperature is warming up into 750 DEG C of progress
Melting, meanwhile, for anti-oxidation, the inert protective gas helium after preheating is passed through from furnace bottom, the inertia protection gas after preheating
Temperature is 450 DEG C；When feeding intake, indoor relative humidity is strict controlled in 40 below ﹪；First, aluminium is added into smelting furnace, treats aluminium
When block melts 50 ﹪, coverture is added, coverture composition is according to RJ2-1 national sector standards in YS/T 491-2005, then
Add Ag and Al-Mn intermediate alloys, Al-Si intermediate alloys, Al-Cu intermediate alloys, Al-Fe intermediate alloys, the conjunction of Al-Zr centres
Gold, Al-Sr intermediate alloys, Al-Cr intermediate alloys, treat the above-mentioned intermediate alloy Mg blocks that all fusing coats afterwards plus with aluminium foil；
When the relatively low metal instantaneous touch of the fusing point melt higher than itself fusing point, the low melting point element added afterwards can rapidly,
The disperse of even ground reduces the generation of bubble among the melt of mixing, and aluminium alloy made from guarantee has good rigidity and extension
Property.Treat that furnace charge all melts, stir and stand 10min, then, be cooled to 730 DEG C, it is total to be incorporated as proportioning in three times into melt
The ﹪ of quality 0.6 C2Cl6, to being emerged without yellow gas, remove the H in melt2Gas, the stomata in aluminium alloy is reduced, improve aluminium
Wear-resisting, the decay resistance of alloy；Bath surface oxidizing slag is clawed afterwards, adds Al-Ti intermediate alloys, agitated and standing
15min, then, 715 DEG C are cooled to, the moulding by casting in water cooled mo(u)ld, obtain cylinder block casting.Cylinder block casting is warming up to 335 DEG C, protected
Warm 14h carries out Homogenization Treatments, then is warming up to 515 DEG C, 13h is incubated, it is then cooled to room temperature.By the cylinder after Homogenization Treatments
Body casting is warming up to 510 DEG C, is incubated 10h, then, water quenching to room temperature, wherein quenching shift time are not more than 25s；Finally, will quench
Cylinder block casting after fire is put into 155 DEG C of stove, and cylinder block aluminium alloy is made in timeliness 9h.
From Fig. 5, Fig. 6, alloy strengthening phase size is tiny, and density is big, meanwhile, alloy crystal boundary is without bright no Precipitation
Band, be advantageous to the raising of alloy macro-mechanical property and decay resistance.
Remaining same embodiment 1.
Cylinder block aluminium alloy prepared by three embodiments of the present invention is through testing, detecting, and examination criteria is according to HB 5143-
96；GB/T 7998-2005；GB/T 22639-2008 are carried out, its tensile strength, Testing Tensile Strength at Elevated Temperature, heat conductivility and corrosion resistant
Corrosion can improve a lot, and the results are shown in Table 1.
Table 1：Tensile strength, thermal conductivity factor and the decay resistance index of cylinder block aluminium alloy
It is close to improve high temperature resistant hardening constituent precipitation in ag(e)ing process by optimized alloy element proportioning and Technology for Heating Processing by the present invention
Degree, alloy Grain Boundary Precipitates density is controlled, improve mechanical property, decay resistance and the resistance to elevated temperatures of aluminium alloy；Increase
The diffusion-type hardening constituent of symbiosis and epibiosis is kept with matrix；Meanwhile the addition of rare earth element, it is good that heat endurance can be formed in grain boundaries
Good radial rare earth compound, strengthen crystal boundary, improve the high-temperature behavior of alloy, engine cylinder-body makes during being advantageous to use
Use life-time dilatation；The cylinder block aluminium alloy of preparation is not on the premise of proportion is increased, room temperature tensile intensity 350MPa or so,
300 DEG C of Testing Tensile Strength at Elevated Temperature 190MPa or so, thermal conductivity factor 260W/ (mK) left and right, intercrystalline corrosion 1~2, Peeling Corrosion N,
Suitable for the harsh working environment of engine cylinder block.
Claims (5)
- A kind of 1. engine cylinder block aluminium alloy, it is characterized in that each element mass percent is：Mg：3.8~4.4 wt. ﹪； Si：4.0~4.8 wt. ﹪；Cu：0.25~0.85 wt. ﹪；Mn：0.35~0.55 wt. ﹪；Cr：0.25~0.35 Wt. ﹪；Zr：0.35~0.4 wt. ﹪；Ti：0.2~0.3 wt. ﹪；Sr：0.02~0.06 wt. ﹪；Ag：0.3~0.45 Wt. ﹪, Fe：0.05~0.1 wt. ﹪, other impurity are single≤0.02 wt. ﹪, summation≤0.1wt. ﹪, surplus is aluminium.
- A kind of 2. preparation method of engine cylinder block aluminium alloy as claimed in claim 1, it is characterized in that it includes following step Suddenly：(1) smelting furnace temperature is warming up to 750~760 DEG C, meanwhile, it is passed through the inert protective gas after preheating from furnace bottom；(2) aluminium block first added into smelting furnace by proportioning, when aluminium block melts 50 ﹪, adds coverture, then by proportioning add Ag, In Al-Mn intermediate alloys, Al-Si intermediate alloys, Al-Cu intermediate alloys, Al-Fe intermediate alloys, Al-Zr intermediate alloys, Al-Sr Between alloy, Al-Cr intermediate alloys, treat that above-mentioned intermediate alloy all adds the Mg blocks coated by aluminium foil after fusing；(3) treat that furnace charge all melts, after stirring and standing 10min, be cooled to 720~740 DEG C；Then, will be by proportioning gross mass 0.6 ﹪ C2Cl6Add in melt, extremely emerged without yellow gas in three times；(4) claw bath surface oxidizing slag, add Al-Ti intermediate alloys, it is agitated, 15min is stood, then, it is cooled to 710~ 720 DEG C, moulding by casting obtains cylinder block casting in water cooled mo(u)ld；(5) the cylinder block casting (4) obtained to step is first warming up to 300~350 DEG C, is incubated 10~15h, then be warming up to 490~520 DEG C, 12~15h is incubated, it is then cooled to room temperature；(6) 500~520 DEG C are heated to (5) cylinder block casting that step obtains, is incubated 6~12h, then, water quenching to room temperature；It will quench Ingot casting after fire is put into 150~160 DEG C of stove, 6~10h of timeliness.
- 3. the preparation method of engine cylinder block aluminium alloy according to claim 2, it is characterized in that step (1) in, it is described Temperature after inert protective gas preheating is 450 DEG C.
- 4. the preparation method of engine cylinder block aluminium alloy according to claim 2, it is characterized in that step (2) in, raw material During dispensing, indoor relative humidity is controlled in 40 below ﹪.
- 5. the preparation method of engine cylinder block aluminium alloy according to claim 2, it is characterized in that step (6) in, water quenching When, quenching shift time is not more than 25s.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619004A (en) * | 2003-11-20 | 2005-05-25 | 北京有色金属研究总院 | Aluminium alloy for semi solid state shaping and preparation method of its semi solid state blank material |
| US20080233000A1 (en) * | 2007-03-23 | 2008-09-25 | Bridgestone Corporation | Aluminum alloy in mold for tire and tire mold |
| JP2014058733A (en) * | 2012-09-19 | 2014-04-03 | Kobe Steel Ltd | Aluminum alloy sheet excellent in baking finish hardenability |
| CN106480343A (en) * | 2016-11-09 | 2017-03-08 | 中南大学 | A kind of high intensity, new A l Mg Si alloy material of seawater corrosion resistance and preparation method thereof |
| WO2017069525A1 (en) * | 2015-10-22 | 2017-04-27 | 영남대학교 산학협력단 | Method for molding aluminum and aluminum alloy powder |
-
2017
- 2017-11-21 CN CN201711164515.5A patent/CN107858562A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619004A (en) * | 2003-11-20 | 2005-05-25 | 北京有色金属研究总院 | Aluminium alloy for semi solid state shaping and preparation method of its semi solid state blank material |
| US20080233000A1 (en) * | 2007-03-23 | 2008-09-25 | Bridgestone Corporation | Aluminum alloy in mold for tire and tire mold |
| JP2014058733A (en) * | 2012-09-19 | 2014-04-03 | Kobe Steel Ltd | Aluminum alloy sheet excellent in baking finish hardenability |
| WO2017069525A1 (en) * | 2015-10-22 | 2017-04-27 | 영남대학교 산학협력단 | Method for molding aluminum and aluminum alloy powder |
| CN106480343A (en) * | 2016-11-09 | 2017-03-08 | 中南大学 | A kind of high intensity, new A l Mg Si alloy material of seawater corrosion resistance and preparation method thereof |
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