CN104789839A - Lightweight high-toughness aluminum alloy - Google Patents

Lightweight high-toughness aluminum alloy Download PDF

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Publication number
CN104789839A
CN104789839A CN201410191464.5A CN201410191464A CN104789839A CN 104789839 A CN104789839 A CN 104789839A CN 201410191464 A CN201410191464 A CN 201410191464A CN 104789839 A CN104789839 A CN 104789839A
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aluminum alloy
temperature
ingot casting
holding furnace
lightweight
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CN104789839B (en
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周良正
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Zheng Mu Aluminum Science And Technology Ltd Of Tianzhang City
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Zheng Mu Aluminum Science And Technology Ltd Of Tianzhang City
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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
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent
    • 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
    • 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
    • C22F1/053—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 zinc as the next major constituent

Abstract

The invention discloses a lightweight high-toughness aluminum alloy. The lightweight high-toughness aluminum alloy comprises the following components by weight: 0.05% of Si, 0.08 to 0.15% of Fe, 2.0 to 2.2% of Cu, 0.05% of Mn, 2.3 to 2.8% of Mg, 0.01% of Cr, 7.2 to 7.8% of Zn, 0.06 to 0.08% of Ti and 0.15% of Zr, with the balance being Al. According to the invention, through increase of the content of zinc in the composition of the aluminum alloy, strength and hardness of the aluminum alloy are effectively improved; through increase of the content of titanium in the aluminum alloy, crystal grains are refined, brittleness is inhibited, and the disadvantage of poor toughness of conventional aluminum alloys is overcome; through improvement of melting and heat treatment technology, overall performance of the aluminum alloy is effectively enhanced, and the aluminum alloy can meet requirements of modern technological development for high-load, lightweight and good toughness of aluminum alloy materials; and the aluminum alloy has the characteristics of light weight, good toughness and fast travel distance of hit balls when applied to a baseball bat.

Description

A kind of lightweight tenacity aluminum alloy
Technical field
The present invention relates to metal material field, particularly relate to a kind of lightweight tenacity aluminum alloy.
Background technology
Baseball and softball are a kind ofly played ball as the very strong ball game project of principal feature, communality, antagonism with ear of maize, bat many employings metal ball bar.Along with the development of sports, increasing people likes enjoying the enjoyment that this kind of motion brings.The quality of bat directly decides the quality of motion, the impact of ball when measured bat of matter not only needs certain hardness and intensity to bear strenuous exercise, also should have good toughness, reduce ball in moving process and, to the surging force of human body, reduce the injury in moving process, human body caused.
Aluminium alloy is the general name of the alloy taking aluminium as base, and main alloy element comprises copper, silicon, magnesium, zinc, manganese, and minor element contains nickel, iron, titanium, lithium, and the principal element content in alloy, proportioning and foreign matter content alloy end properties have a significant impact.At present, lightweight tenacity aluminum alloy material is applied to building, military and industrial circle in a large number, the lightweight tenacity aluminum alloy strength of materials that civilian and military enterprise produces is low, hardness is low, poor toughness, can not meet the requirement of modern development in science and technology to lightweight tenacity aluminum alloy material high-load, lighting, good toughness.The bat made of existing lightweight tenacity aluminum alloy material often intensity and hardness lower, violent square stance ball can not be born to the surging force of rod, in addition, the bat toughness that existing lightweight tenacity aluminum alloy material is made is poor, the severe impact being subject to ball can not restore to the original state rapidly, often embrittlement occurs, or causes vibratory impulse to human body, people is not felt well, reduces the quality of motion.
Therefore, how by optimizing lightweight tenacity aluminum alloy production technique, obtaining a kind of lightweight tenacity aluminum alloy material of good combination property, meeting that club's weight is light, requirement that good springiness, batting are far away is current problem demanding prompt solution.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of lightweight tenacity aluminum alloy, achieve the optimization of lightweight tenacity aluminum alloy production technique, its good combination property, be very suitable for making bat.
The invention discloses a kind of lightweight tenacity aluminum alloy, its moiety comprises by weight percentage: Si:0.05%, Fe:0.08-0.15%, Cu:2.0-2.2%, Mn:0.05%, Mg:2.3-2.8%, Cr:0.01%, Zn:7.2-7.8%, Ti:0.06-0.08%, Zr:0.15%, surplus is Al, and prepares according to following steps:
S1: melting, each raw material is taken according to its moiety, aluminium ingot to be added in smelting furnace and be heated to 700-750 DEG C make it to melt completely after, other each raw material is added successively, after other each raw material melts completely, at 680-720 DEG C of insulation 30min-2h by fusing point order from high to low, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting air cooling to room temperature; Each melting process of raw material carries out in seal cavity;
S2: homogenizing, is positioned over the ingot casting obtained in S1 in the holding furnace of 400-420 DEG C, and is incubated 20-30h at 400-420 DEG C, and be incubated after rear holding furnace is chilled to 300 DEG C, air cooling is to room temperature;
S3: solid solution, the ingot casting obtained in S2 is positioned in holding furnace, with the V-bar of 10 DEG C/h, 470 DEG C are heated to and after be incubated 1-2h 470 DEG C from room temperature, with the speed of 100 DEG C/h, temperature is risen to 480 DEG C from 470 DEG C, and after 480 DEG C of insulation 20-40min, ingot casting is transferred to quenching furnance from holding furnace, water-cooled is to room temperature, and wherein from holding furnace, by ingot casting, the time be transferred in quenching furnance is less than 5s;
S4: preliminary draft, carries out preliminary draft by the ingot casting after water-cooled in S3 to room temperature in 20min on drawing machine, and the deflection of preliminary draft is 2.2%;
S5: timeliness, puts into 100 DEG C of holding furnaces by the ingot casting completing preliminary draft in S4 in 10min, and wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s; After holding furnace temperature is warming up to 170 DEG C with the V-bar of 20 DEG C/h, holding furnace temperature is cooled to 120 DEG C with the V-bar of 30 DEG C/h, and 16-20h is incubated at 120 DEG C, ingot casting is transferred to water-cooled quenching furnance from holding furnace and, to room temperature, obtains described lightweight tenacity aluminum alloy.
Preferably, in its moiety, the mol ratio of Zn and Mg is (1.1-1.3): 1.
Preferably, in step s3, ingot casting is from the process of room temperature to 470 DEG C, and with the rising of temperature, temperature rise rate increases, and temperature and time becomes sinusoidal function relation.
Preferably, in step s 5, ingot casting is warming up to the process of 170 DEG C from 100 DEG C, and with the rising of temperature, temperature rise rate increases, and temperature rise rate becomes tan relation with the time.
Preferably, in step s 5, ingot casting is cooled to the process of 120 DEG C from 170 DEG C, and with the reduction of temperature, rate of temperature fall reduces, and rate of temperature fall becomes cotangent relation with the time.
Preferably, in step sl, in alloy melt process of setting, alloy melt vibrates.
Preferably, in step sl, after each raw material melts after adding completely, all carry out except slag operation.
Preferably, its moiety is Si:0.05%, Fe:0.12%, Cu:2.1%, Mn:0.05%, Mg:2.4%, Cr:0.01%, Zn:7.8%, Ti:0.08%, Zr:0.15% by weight percentage, and surplus is Al.
In the present invention, the lightweight tenacity aluminum alloy of proposition is by optimizing components, and heat treatment technology improvement, improves the over-all properties of lightweight tenacity aluminum alloy, and make it to be applicable to making high quality bat, compared with prior art, concrete advantage is as follows:
1, alloy composition is optimized, and improves the content of zinc element in alloy, and according to the change of zinc element content, have adjusted the content value of magnesium elements and copper, thus control MgZn 2phase, AlZnMgCu phase, Al 2the precipitation quantity of MgCu phase and proportionlity, meanwhile, adopt the compound of chromium element, zr element and titanium elements to add, play the effect of pinning crystal boundary, crystal grain thinning, provide the basis obtaining excellent over-all properties;
2, melting and thermal treatment process are optimized, by the optimization to melting technology, each alloying element is made to realize good fusion, by the optimization to Homogenization Treatments technique, the nonequilibrium freezing eutectic structure on ingot casting crystal boundary can be eliminated, by the optimization to solid solution treatment process, the supersaturated solid solution of room and solute atoms can be obtained, for strengthening phase in follow-up ageing treatment is separated out ready, a large amount of dislocation can be introduced at grain boundaries by preliminary draft technique, thus in follow-up timeliness, make Grain Boundary Precipitates alligatoring also more discontinuous, and precipitate free zone can be made to broaden, promote the toughness of alloy, by the optimization to aging treatment process, strengthening phase is separated out and distribution is reasonable, control intracrystalline grain boundaries strengthening phase distributional pattern, obtain good strength and toughness.
Embodiment
Below in conjunction with specific examples, the present invention is described in detail; should understand; embodiment is only for illustration of the present invention, instead of for limiting the present invention, any amendment, equivalent replacement etc. made on basis of the present invention is all in protection scope of the present invention.
Lightweight tenacity aluminum alloy disclosed in this invention, in each embodiment, composition proportion (weight percent) detected result of ingot casting is as shown in table 1:
Zn Mg Cu Mn Cr Ti Zr Fe Si Al
Embodiment 1 7.8 2.8 2.2 0.05 0.01 0.08 0.15 0.15 0.05 Surplus
Embodiment 2 7.2 2.3 2.0 0.05 0.01 0.06 0.15 0.08 0.05 Surplus
Embodiment 3 7.6 2.6 2.1 0.05 0.01 0.07 0.15 0.12 0.05 Surplus
Embodiment 4 7.8 2.4 2.1 0.05 0.01 0.08 0.15 0.12 0.05 Surplus
Embodiment 5 7.6 2.5 2.2 0.05 0.01 0.08 0.15 0.12 0.05 Surplus
Embodiment 6 7.4 2.4 2.0 0.05 0.01 0.06 0.15 0.10 0.05 Surplus
Each embodiment preparation method is as follows:
Embodiment 1
S1: melting, take each raw material according to its moiety, aluminium ingot to be added in smelting furnace and be heated to 750 DEG C make it to melt completely after, add other each raw material successively by fusing point order from high to low, after other each raw material melts completely, after each raw material melts after adding completely, all carry out except slag operation, at 720 DEG C of insulation 30min, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting air cooling to room temperature; In alloy melt process of setting, by knocking mould, alloy melt vibrates, and each melting process of raw material carries out in seal cavity;
S2: homogenizing, is positioned over the ingot casting obtained in S1 in the holding furnace of 420 DEG C, and is incubated 28h at 420 DEG C, and be incubated after rear holding furnace is chilled to 300 DEG C, air cooling is to room temperature;
S3: solid solution, the ingot casting obtained in S2 is positioned in holding furnace, with the V-bar of 10 DEG C/h, 470 DEG C are heated to and after be incubated 2h 470 DEG C from room temperature, with the speed of 100 DEG C/h, temperature is risen to 480 DEG C from 470 DEG C, and after 480 DEG C of insulation 40min, ingot casting is transferred to quenching furnance from holding furnace, water-cooled is to room temperature, and wherein from holding furnace, by ingot casting, the time be transferred in quenching furnance is less than 5s, wherein, ingot casting is from the process of room temperature to 470 DEG C, with the rising of temperature, temperature rise rate increases, and temperature and time becomes sinusoidal function relation;
S4: preliminary draft, carries out preliminary draft by the ingot casting after water-cooled in S3 to room temperature in 20min on drawing machine, and the deflection of preliminary draft is 2.2%;
S5: timeliness, puts into 100 DEG C of holding furnaces by the ingot casting completing preliminary draft in S4 in 10min, and wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s, after holding furnace temperature is warming up to 170 DEG C with the V-bar of 20 DEG C/h, holding furnace temperature is cooled to 120 DEG C with the V-bar of 30 DEG C/h, and 20h is incubated at 120 DEG C, ingot casting to be transferred to quenching furnance water-cooled to room temperature from holding furnace, obtain described lightweight tenacity aluminum alloy, wherein, ingot casting is warming up to the process of 170 DEG C from 100 DEG C, with the rising of temperature, temperature rise rate increases, and temperature rise rate becomes tan relation with the time, ingot casting is cooled to the process of 120 DEG C from 170 DEG C, with the reduction of temperature, rate of temperature fall reduces, and rate of temperature fall becomes cotangent relation with the time.
Embodiment 2
S1: melting, take each raw material according to its moiety, aluminium ingot to be added in smelting furnace and be heated to 700 DEG C make it to melt completely after, add other each raw material successively by fusing point order from high to low, after other each raw material melts completely, after each raw material melts after adding completely, all carry out except slag operation, at 680 DEG C of insulation 2h, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting air cooling to room temperature; In alloy melt process of setting, by knocking mould, alloy melt vibrates, and each melting process of raw material carries out in seal cavity;
S2: homogenizing, is positioned over the ingot casting obtained in S1 in the holding furnace of 400 DEG C, and is incubated 30h at 400 DEG C, and be incubated after rear holding furnace is chilled to 300 DEG C, air cooling is to room temperature;
S3: solid solution, the ingot casting obtained in S2 is positioned in holding furnace, with the V-bar of 10 DEG C/h, 470 DEG C are heated to and after be incubated 1h 470 DEG C from room temperature, with the speed of 100 DEG C/h, temperature is risen to 480 DEG C from 470 DEG C, and after 480 DEG C of insulation 20min, ingot casting is transferred to quenching furnance from holding furnace, water-cooled is to room temperature, and wherein from holding furnace, by ingot casting, the time be transferred in quenching furnance is less than 5s, wherein, ingot casting is from the process of room temperature to 470 DEG C, with the rising of temperature, temperature rise rate increases, and temperature and time becomes sinusoidal function relation;
S4: preliminary draft, carries out preliminary draft by the ingot casting after water-cooled in S3 to room temperature in 20min on drawing machine, and the deflection of preliminary draft is 2.2%;
S5: timeliness, puts into 100 DEG C of holding furnaces by the ingot casting completing preliminary draft in S4 in 10min, and wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s, after holding furnace temperature is warming up to 170 DEG C with the V-bar of 20 DEG C/h, holding furnace temperature is cooled to 120 DEG C with the V-bar of 30 DEG C/h, and 18h is incubated at 120 DEG C, ingot casting to be transferred to quenching furnance water-cooled to room temperature from holding furnace, obtain described lightweight tenacity aluminum alloy, wherein, ingot casting is warming up to the process of 170 DEG C from 100 DEG C, with the rising of temperature, temperature rise rate increases, and temperature rise rate becomes tan relation with the time, ingot casting is cooled to the process of 120 DEG C from 170 DEG C, with the reduction of temperature, rate of temperature fall reduces, and rate of temperature fall becomes cotangent relation with the time.
Embodiment 3
S1: melting, take each raw material according to its moiety, aluminium ingot to be added in smelting furnace and be heated to 720 DEG C make it to melt completely after, add other each raw material successively by fusing point order from high to low, after other each raw material melts completely, after each raw material melts after adding completely, all carry out except slag operation, at 700 DEG C of insulation 1h, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting air cooling to room temperature; In alloy melt process of setting, by knocking mould, alloy melt vibrates, and each melting process of raw material carries out in seal cavity;
S2: homogenizing, is positioned over the ingot casting obtained in S1 in the holding furnace of 420 DEG C, and is incubated 22h at 420 DEG C, and be incubated after rear holding furnace is chilled to 300 DEG C, air cooling is to room temperature;
S3: solid solution, the ingot casting obtained in S2 is positioned in holding furnace, with the V-bar of 10 DEG C/h, 470 DEG C are heated to and after be incubated 1.5h 470 DEG C from room temperature, with the speed of 100 DEG C/h, temperature is risen to 480 DEG C from 470 DEG C, and after 480 DEG C of insulation 30min, ingot casting is transferred to quenching furnance from holding furnace, water-cooled is to room temperature, and wherein from holding furnace, by ingot casting, the time be transferred in quenching furnance is less than 5s, wherein, ingot casting is from the process of room temperature to 470 DEG C, with the rising of temperature, temperature rise rate increases, and temperature and time becomes sinusoidal function relation;
S4: preliminary draft, carries out preliminary draft by the ingot casting after water-cooled in S3 to room temperature in 20min on drawing machine, and the deflection of preliminary draft is 2.2%;
S5: timeliness, puts into 100 DEG C of holding furnaces by the ingot casting completing preliminary draft in S4 in 10min, and wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s, after holding furnace temperature is warming up to 170 DEG C with the V-bar of 20 DEG C/h, holding furnace temperature is cooled to 120 DEG C with the V-bar of 30 DEG C/h, and 18h is incubated at 120 DEG C, ingot casting to be transferred to quenching furnance water-cooled to room temperature from holding furnace, obtain described lightweight tenacity aluminum alloy, wherein, ingot casting is warming up to the process of 170 DEG C from 100 DEG C, with the rising of temperature, temperature rise rate increases, and temperature rise rate becomes tan relation with the time, ingot casting is cooled to the process of 120 DEG C from 170 DEG C, with the reduction of temperature, rate of temperature fall reduces, and rate of temperature fall becomes cotangent relation with the time.
Embodiment 4
S1: melting, take each raw material according to its moiety, aluminium ingot to be added in smelting furnace and be heated to 720 DEG C make it to melt completely after, add other each raw material successively by fusing point order from high to low, after other each raw material melts completely, after each raw material melts after adding completely, all carry out except slag operation, at 700 DEG C of insulation 40min, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting air cooling to room temperature; In alloy melt process of setting, by knocking mould, alloy melt vibrates, and each melting process of raw material carries out in seal cavity;
S2: homogenizing, is positioned over the ingot casting obtained in S1 in the holding furnace of 410 DEG C, and is incubated 25h at 410 DEG C, and be incubated after rear holding furnace is chilled to 300 DEG C, air cooling is to room temperature;
S3: solid solution, the ingot casting obtained in S2 is positioned in holding furnace, with the V-bar of 10 DEG C/h, 470 DEG C are heated to and after be incubated 1.5h 470 DEG C from room temperature, with the speed of 100 DEG C/h, temperature is risen to 480 DEG C from 470 DEG C, and after 480 DEG C of insulation 30min, ingot casting is transferred to quenching furnance from holding furnace, water-cooled is to room temperature, and wherein from holding furnace, by ingot casting, the time be transferred in quenching furnance is less than 5s, wherein, ingot casting is from the process of room temperature to 470 DEG C, with the rising of temperature, temperature rise rate increases, and temperature and time becomes sinusoidal function relation;
S4: preliminary draft, carries out preliminary draft by the ingot casting after water-cooled in S3 to room temperature in 20min on drawing machine, and the deflection of preliminary draft is 2.2%;
S5: timeliness, puts into 100 DEG C of holding furnaces by the ingot casting completing preliminary draft in S4 in 10min, and wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s, after holding furnace temperature is warming up to 170 DEG C with the V-bar of 20 DEG C/h, holding furnace temperature is cooled to 120 DEG C with the V-bar of 30 DEG C/h, and 18h is incubated at 120 DEG C, ingot casting to be transferred to quenching furnance water-cooled to room temperature from holding furnace, obtain described lightweight tenacity aluminum alloy, wherein, ingot casting is warming up to the process of 170 DEG C from 100 DEG C, with the rising of temperature, temperature rise rate increases, and temperature rise rate becomes tan relation with the time, ingot casting is cooled to the process of 120 DEG C from 170 DEG C, with the reduction of temperature, rate of temperature fall reduces, and rate of temperature fall becomes cotangent relation with the time.
Embodiment 5
S1: melting, take each raw material according to its moiety, aluminium ingot to be added in smelting furnace and be heated to 730 DEG C make it to melt completely after, add other each raw material successively by fusing point order from high to low, after other each raw material melts completely, after each raw material melts after adding completely, all carry out except slag operation, at 700 DEG C of insulation 40min, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting air cooling to room temperature; In alloy melt process of setting, by knocking mould, alloy melt vibrates, and each melting process of raw material carries out in seal cavity;
S2: homogenizing, is positioned over the ingot casting obtained in S1 in the holding furnace of 420 DEG C, and is incubated 24h at 420 DEG C, and be incubated after rear holding furnace is chilled to 300 DEG C, air cooling is to room temperature;
S3: solid solution, the ingot casting obtained in S2 is positioned in holding furnace, with the V-bar of 10 DEG C/h, 470 DEG C are heated to and after be incubated 1.5h 470 DEG C from room temperature, with the speed of 100 DEG C/h, temperature is risen to 480 DEG C from 470 DEG C, and after 480 DEG C of insulation 30min, ingot casting is transferred to quenching furnance from holding furnace, water-cooled is to room temperature, and wherein from holding furnace, by ingot casting, the time be transferred in quenching furnance is less than 5s, wherein, ingot casting is from the process of room temperature to 470 DEG C, with the rising of temperature, temperature rise rate increases, and temperature and time becomes sinusoidal function relation;
S4: preliminary draft, carries out preliminary draft by the ingot casting after water-cooled in S3 to room temperature in 20min on drawing machine, and the deflection of preliminary draft is 2.2%;
S5: timeliness, puts into 100 DEG C of holding furnaces by the ingot casting completing preliminary draft in S4 in 10min, and wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s, after holding furnace temperature is warming up to 170 DEG C with the V-bar of 20 DEG C/h, holding furnace temperature is cooled to 120 DEG C with the V-bar of 30 DEG C/h, and 18h is incubated at 120 DEG C, ingot casting to be transferred to quenching furnance water-cooled to room temperature from holding furnace, obtain described lightweight tenacity aluminum alloy, wherein, ingot casting is warming up to the process of 170 DEG C from 100 DEG C, with the rising of temperature, temperature rise rate increases, and temperature rise rate becomes tan relation with the time, ingot casting is cooled to the process of 120 DEG C from 170 DEG C, with the reduction of temperature, rate of temperature fall reduces, and rate of temperature fall becomes cotangent relation with the time.
Embodiment 6
S1: melting, take each raw material according to its moiety, aluminium ingot to be added in smelting furnace and be heated to 750 DEG C make it to melt completely after, add other each raw material successively by fusing point order from high to low, after other each raw material melts completely, after each raw material melts after adding completely, all carry out except slag operation, at 700 DEG C of insulation 40min, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting air cooling to room temperature; In alloy melt process of setting, by knocking mould, alloy melt vibrates, and each melting process of raw material carries out in seal cavity;
S2: homogenizing, is positioned over the ingot casting obtained in S1 in the holding furnace of 420 DEG C, and is incubated 24h at 420 DEG C, and be incubated after rear holding furnace is chilled to 300 DEG C, air cooling is to room temperature;
S3: solid solution, the ingot casting obtained in S2 is positioned in holding furnace, with the V-bar of 10 DEG C/h, 470 DEG C are heated to and after be incubated 2h 470 DEG C from room temperature, with the speed of 100 DEG C/h, temperature is risen to 480 DEG C from 470 DEG C, and after 480 DEG C of insulation 30min, ingot casting is transferred to quenching furnance from holding furnace, water-cooled is to room temperature, and wherein from holding furnace, by ingot casting, the time be transferred in quenching furnance is less than 5s, wherein, ingot casting is from the process of room temperature to 470 DEG C, with the rising of temperature, temperature rise rate increases, and temperature and time becomes sinusoidal function relation;
S4: preliminary draft, carries out preliminary draft by the ingot casting after water-cooled in S3 to room temperature in 20min on drawing machine, and the deflection of preliminary draft is 2.2%;
S5: timeliness, puts into 100 DEG C of holding furnaces by the ingot casting completing preliminary draft in S4 in 10min, and wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s, after holding furnace temperature is warming up to 170 DEG C with the V-bar of 20 DEG C/h, holding furnace temperature is cooled to 120 DEG C with the V-bar of 30 DEG C/h, and 16h is incubated at 120 DEG C, ingot casting to be transferred to quenching furnance water-cooled to room temperature from holding furnace, obtain described lightweight tenacity aluminum alloy, wherein, ingot casting is warming up to the process of 170 DEG C from 100 DEG C, with the rising of temperature, temperature rise rate increases, and temperature rise rate becomes tan relation with the time, ingot casting is cooled to the process of 120 DEG C from 170 DEG C, with the reduction of temperature, rate of temperature fall reduces, and rate of temperature fall becomes cotangent relation with the time.
In embodiment 1-6, ferro element and element silicon are non-Addition ofelements, and it is mainly derived from mould in fusion process and uses inevitably introducing; By step S1, in fusion process, the control of technique makes each element good knitting, knocks mould, can play the effect of crystal grain thinning in alloy melt process of setting; In Homogenization Treatments, more than 400 DEG C, insulation is more than 20h, and can eliminate the nonequilibrium freezing eutectic structure on ingot casting crystal boundary, after stove is chilled to 300 DEG C, air cooling is to room temperature, can make full use of heat energy and consolidate homogenizing achievement; In solution treatment, by adopting double_stage guide system, can be that secondary solid solution is prepared by one-level solid solution, be conducive under the prerequisite avoiding burning, improve the degree of supersaturation of solute atoms, thus be conducive to hardening strength raising in follow-up ageing process, and then strengthen the intensity of alloy, meanwhile, adopt the mode progressively heated up, be conducive to heating uniformity, prevent local burning; In preliminary draft, an energy part is released with form of thermal energy, and a part is stored in alloy as energy storage, and the energy storage be stored in alloy is mainly present in grain boundaries with the form of dislocation, makes in follow-up ag(e)ing process, and the high energy storage of grain boundaries dislocation is conducive to grain boundaries MgZn 2the forming core of phase is grown up, thus forms abnormal thick precipitated phase, MgZn 2phase alligatoring makes spacing between its particle expand, and disconnection phenomenon is remarkable, and in deformation process, difficulty is transmitted in slippage, and during distortion, moulding stream becomes evenly, thus has higher resistance to deformation, improves the toughness of alloy; In ageing treatment, the mode that have employed intensification-cooling carries out timeliness, on the one hand can the controllability of enhanced process, low-alloyed anisotropy is fallen, on the other hand, take full advantage of intracrystalline and separate out the asynchronism of growing up mutually with grain-boundary strengthening, can be better controlled the distributional pattern of intracrystalline grain boundaries strengthening phase, thus the matching degree of adjustment intensity, toughness and synchronism.
In embodiment 1-6, the tensile strength of lightweight tenacity aluminum alloy described in repeated test five groups, yield strength, hardness and unit elongation, the parameter value of averaging of income data and lightweight tenacity aluminum alloy 7075-T651 is listed in table 2.
Table 2 embodiment 1-6 and typical lightweight tenacity aluminum alloy 7075-T651 mechanical performance parameter
From the test data of embodiment 1-6 in above-mentioned table 1 and typical lightweight tenacity aluminum alloy 7075-T651 tensile strength, yield strength, hardness and unit elongation, no matter single performance or over-all properties, lightweight tenacity aluminum alloy described in the present invention is all better than typical lightweight tenacity aluminum alloy 7075-T651, can meet that club's weight is light, requirement that good toughness, batting are far away.

Claims (8)

1. a lightweight tenacity aluminum alloy, for making bat, is characterized in that, its moiety comprises by weight percentage: Si:0.05%, Fe:0.08-0.15%, Cu:2.0-2.2%, Mn:0.05%, Mg:2.3-2.8%, Cr:0.01%, Zn:7.2-7.8%, Ti:0.06-0.08%, Zr:0.15%, surplus is Al, and prepares according to following steps:
S1: melting, each raw material is taken according to its moiety, aluminium ingot to be added in smelting furnace and be heated to 700-750 DEG C make it to melt completely after, other each raw material is added successively, after other each raw material melts completely, at 680-720 DEG C of insulation 30min-2h by fusing point order from high to low, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting air cooling to room temperature; Each melting process of raw material carries out in seal cavity;
S2: homogenizing, is positioned over the ingot casting obtained in S1 in the holding furnace of 400-420 DEG C, and is incubated 20-30h at 400-420 DEG C, and be incubated after rear holding furnace is chilled to 300 DEG C, air cooling is to room temperature;
S3: solid solution, the ingot casting obtained in S2 is positioned in holding furnace, with the V-bar of 10 DEG C/h, 470 DEG C are heated to and after be incubated 1-2h 470 DEG C from room temperature, with the speed of 100 DEG C/h, temperature is risen to 480 DEG C from 470 DEG C, and after 480 DEG C of insulation 20-40min, ingot casting is transferred to quenching furnance from holding furnace, water-cooled is to room temperature, and wherein from holding furnace, by ingot casting, the time be transferred in quenching furnance is less than 5s;
S4: preliminary draft, carries out preliminary draft by the ingot casting after water-cooled in S3 to room temperature in 20min on drawing machine, and the deflection of preliminary draft is 2.2%;
S5: timeliness, puts into 100 DEG C of holding furnaces by the ingot casting completing preliminary draft in S4 in 10min, and wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s; After holding furnace temperature is warming up to 170 DEG C with the V-bar of 20 DEG C/h, holding furnace temperature is cooled to 120 DEG C with the V-bar of 30 DEG C/h, and 16-20h is incubated at 120 DEG C, ingot casting is transferred to water-cooled quenching furnance from holding furnace and, to room temperature, obtains described lightweight tenacity aluminum alloy.
2. lightweight tenacity aluminum alloy according to claim 1, is characterized in that, in its moiety, the mol ratio of Zn and Mg is (1.1-1.3): 1.
3. lightweight tenacity aluminum alloy according to claim 1, is characterized in that, in step s3, ingot casting is from the process of room temperature to 470 DEG C, and with the rising of temperature, temperature rise rate increases, and temperature and time becomes sinusoidal function relation.
4. lightweight tenacity aluminum alloy according to claim 1, is characterized in that, in step s 5, ingot casting is warming up to the process of 170 DEG C from 100 DEG C, and with the rising of temperature, temperature rise rate increases, and temperature rise rate becomes tan relation with the time.
5. lightweight tenacity aluminum alloy according to claim 1, is characterized in that, in step s 5, ingot casting is cooled to the process of 120 DEG C from 170 DEG C, and with the reduction of temperature, rate of temperature fall reduces, and rate of temperature fall becomes cotangent relation with the time.
6. lightweight tenacity aluminum alloy according to claim 1, is characterized in that, in step sl, in alloy melt process of setting, alloy melt vibrates.
7. lightweight tenacity aluminum alloy according to claim 1, is characterized in that, in step sl, after each raw material melts after adding completely, all carries out except slag operation.
8. lightweight tenacity aluminum alloy according to claim 1, is characterized in that, its moiety is Si:0.05%, Fe:0.12% by weight percentage, Cu:2.1%, Mn:0.05%, Mg:2.4%, Cr:0.01%, Zn:7.8%, Ti:0.08%, Zr:0.15%, surplus is Al.
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