CN104789838A - Strong and tough aluminum alloy for baseball bat - Google Patents

Strong and tough aluminum alloy for baseball bat Download PDF

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Publication number
CN104789838A
CN104789838A CN201410191462.6A CN201410191462A CN104789838A CN 104789838 A CN104789838 A CN 104789838A CN 201410191462 A CN201410191462 A CN 201410191462A CN 104789838 A CN104789838 A CN 104789838A
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room temperature
holding furnace
ingot casting
transferred
temperature
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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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Continuous Casting (AREA)

Abstract

The invention discloses a strong and tough aluminum alloy for a baseball bat. The strong and tough 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 0.12 to 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

The tough aluminium alloy of a kind of bat
Technical field
The present invention relates to metal material field, particularly relate to the tough aluminium alloy of a kind of bat.
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, aluminum alloy materials is applied to building, military and industrial circle in a large number, the aluminum alloy materials intensity 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 aluminum alloy materials high-load, lighting, good toughness.The bat made of existing aluminum alloy materials 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 aluminum alloy materials 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 aluminum alloy production process, obtaining a kind of aluminum alloy materials 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 the tough aluminium alloy of a kind of bat, achieve the optimization of aluminum alloy production process, its good combination property, be very suitable for making softball bat or baseball bat.
The invention discloses the tough aluminium alloy of a kind of bat, 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:0.12-0.15%, 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: timeliness, after water-cooled in S3 to the ingot casting removing surface water drops of room temperature, take out from quenching and put into after 100 DEG C of holding furnaces are incubated 20h, after water-cooled to room temperature, to be transferred in holding furnace and after holding furnace temperature is warming up to 180 DEG C of insulation 40min with the V-bar of 60 DEG C/min, after holding furnace temperature is cooled to room temperature with the V-bar of 20 DEG C/min, be transferred in 120 DEG C of holding furnaces, 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 aluminium alloy, wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s.
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 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%, M by weight percentage g: 2.4%, Cr:0.01%, Zn:7.8%, Ti:0.08%, Zr:0.15%, surplus is Al.
In the present invention, the bat of proposition is with tough aluminium alloy by optimizing components, and heat treatment technology improvement, improves the over-all properties of aluminium 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, 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.
The tough aluminium alloy of bat 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 0.12 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 0.14 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 0.14 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: timeliness, after water-cooled in S3 to the ingot casting removing surface water drops of room temperature, take out from quenching and put into after 100 DEG C of holding furnaces are incubated 20h, after water-cooled to room temperature, to be transferred in holding furnace and after holding furnace temperature is warming up to 180 DEG C of insulation 40min with the V-bar of 60 DEG C/min, after holding furnace temperature is cooled to room temperature with the V-bar of 20 DEG C/min, be transferred in 120 DEG C of holding furnaces, 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 aluminium alloy, wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s.
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: timeliness, after water-cooled in S3 to the ingot casting removing surface water drops of room temperature, take out from quenching and put into after 100 DEG C of holding furnaces are incubated 20h, after water-cooled to room temperature, to be transferred in holding furnace and after holding furnace temperature is warming up to 180 DEG C of insulation 40min with the V-bar of 60 DEG C/min, after holding furnace temperature is cooled to room temperature with the V-bar of 20 DEG C/min, be transferred in 120 DEG C of holding furnaces, 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 aluminium alloy, wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s.
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: timeliness, after water-cooled in S3 to the ingot casting removing surface water drops of room temperature, take out from quenching and put into after 100 DEG C of holding furnaces are incubated 20h, after water-cooled to room temperature, to be transferred in holding furnace and after holding furnace temperature is warming up to 180 DEG C of insulation 40min with the V-bar of 60 DEG C/min, after holding furnace temperature is cooled to room temperature with the V-bar of 20 DEG C/min, be transferred in 120 DEG C of holding furnaces, 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 aluminium alloy, wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s.
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: timeliness, after water-cooled in S3 to the ingot casting removing surface water drops of room temperature, take out from quenching and put into after 100 DEG C of holding furnaces are incubated 20h, after water-cooled to room temperature, to be transferred in holding furnace and after holding furnace temperature is warming up to 180 DEG C of insulation 40min with the V-bar of 60 DEG C/min, after holding furnace temperature is cooled to room temperature with the V-bar of 20 DEG C/min, be transferred in 120 DEG C of holding furnaces, 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 aluminium alloy, wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s.
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: timeliness, after water-cooled in S3 to the ingot casting removing surface water drops of room temperature, take out from quenching and put into after 100 DEG C of holding furnaces are incubated 20h, after water-cooled to room temperature, to be transferred in holding furnace and after holding furnace temperature is warming up to 180 DEG C of insulation 40min with the V-bar of 60 DEG C/min, after holding furnace temperature is cooled to room temperature with the V-bar of 20 DEG C/min, be transferred in 120 DEG C of holding furnaces, 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 aluminium alloy, wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s.
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: timeliness, after water-cooled in S3 to the ingot casting removing surface water drops of room temperature, take out from quenching and put into after 100 DEG C of holding furnaces are incubated 20h, after water-cooled to room temperature, to be transferred in holding furnace and after holding furnace temperature is warming up to 180 DEG C of insulation 40min with the V-bar of 60 DEG C/min, after holding furnace temperature is cooled to room temperature with the V-bar of 20 DEG C/min, be transferred in 120 DEG C of holding furnaces, 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 aluminium alloy, wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s.
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, first carry out tensile pre-deformation, dislocation can be introduced, be conducive to the nucleation of strengthening phase in subsequent disposal, be conducive to the lifting of toughness, 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 ageing treatment, from energy point of view, after solution hardening, alloy is in a kind of metastable condition, supersaturated solid solution generation precipitation during ageing treatment, separate out the solute the second-phase forming Dispersed precipitate that exceed balance solubility, because main alloying element in alloy is Zn, Mg, Cu, in its ag(e)ing process, the precipitation process of strengthening phase is: the metastable state MgZn of supersaturated solid solution → GP district → small and dispersed 2phase → stable state MgZn 2the stable state MgZn of phase → thick 2phase, be incubated 20h in 100 DEG C of holding furnaces after, in alloy, matrix precipitate is metastable state MgZn 2phase and stable state MgZn 2xiang Weizhu, also have a small amount of GP district, Grain Boundary Precipitates is stable state MgZn 2xiang Weizhu, also has a small amount of metastable state MgZn 2phase, water-cooled is to room temperature, and precipitated phase form is preserved, in the process being warming up to 180 DEG C of insulation 40min with the V-bar of 60 DEG C/min, intracrystalline GP district, metastable state MgZn 2a large amount of back dissolving mutually, the metastable state MgZn that crystal boundary is a small amount of 2phase back dissolving, stable state MgZn 2grow up mutually, be cooled in room temperature process with the V-bar of 20 DEG C/min, intracrystalline forms more room, and contribute to later stage precipitation, be incubated at 120 DEG C in 20h process, intracrystalline is separated out again, and strengthening phase is with stable state MgZn 2xiang Weizhu, is conducive to alloy strength, and Grain Boundary Precipitates continues to grow up, thus to obtain matrix precipitate be super peak timeliness distribution, and the Grain Boundary Precipitates thick discontinuously arranged state that is overaging, thus obtain good over-all properties.
In embodiment 1-6, the tensile strength of tough aluminium alloy of bat described in repeated test five groups, yield strength, hardness and unit elongation, the parameter value of averaging of income data and aluminium alloy 7075-T651 is listed in table 2.
Table 2 embodiment 1-6 and typical aluminium alloy 7075-T651 mechanical performance parameter
From the test data of embodiment 1-6 in above-mentioned table 1 and typical aluminium alloy 7075-T651 tensile strength, yield strength, hardness and unit elongation, no matter single performance or over-all properties, aluminium alloy described in the present invention is all better than typical aluminium alloy 7075-T651, can meet that club's weight is light, requirement that good toughness, batting are far away.

Claims (6)

1. the tough aluminium alloy of 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:0.12-0.15%, 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: timeliness, after water-cooled in S3 to the ingot casting removing surface water drops of room temperature, take out from quenching and put into after 100 DEG C of holding furnaces are incubated 20h, after water-cooled to room temperature, to be transferred in holding furnace and after holding furnace temperature is warming up to 180 DEG C of insulation 40min with the V-bar of 60 DEG C/min, after holding furnace temperature is cooled to room temperature with the V-bar of 20 DEG C/min, be transferred in 120 DEG C of holding furnaces, 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 the tough aluminium alloy of described bat, wherein, the time be transferred to from quenching furnance in holding furnace is less than 30s.
2. the tough aluminium alloy of bat according to claim 1, is characterized in that, in its moiety, and Zn and M gmol ratio be (1.1-1.3): 1.
3. the tough aluminium alloy of bat 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. the tough aluminium alloy of bat according to claim 1, is characterized in that, in step sl, in alloy melt process of setting, alloy melt vibrates.
5. the tough aluminium alloy of bat 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.
6. the tough aluminium alloy of bat 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.
CN201410191462.6A 2014-05-07 2014-05-07 Strong and tough aluminum alloy for baseball bat Pending CN104789838A (en)

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