CN108265206A - High intensity height heat dissipation aluminum alloy die casting - Google Patents

High intensity height heat dissipation aluminum alloy die casting Download PDF

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Publication number
CN108265206A
CN108265206A CN201810102780.9A CN201810102780A CN108265206A CN 108265206 A CN108265206 A CN 108265206A CN 201810102780 A CN201810102780 A CN 201810102780A CN 108265206 A CN108265206 A CN 108265206A
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parts
heat
aluminum alloy
die casting
component
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CN108265206B (en
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陶诚
徐光周
陈泽彬
匡中华
陈晓东
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Shenzhen Minglida Precision Technology Co ltd
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SHENZHEN MINGLIDA PRECISION MACHINERY CO Ltd
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/01—Alloys based on copper with aluminium as the next major constituent

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

The invention discloses high intensity height heat dissipation aluminum alloy die castings.The aluminum alloy die casting includes sequentially connected supporting layer, middle layer and heat dissipating layer；Supporting layer includes following components：Al、Si、Mg、Cu、Ti、Cr、Bi、C、As；Middle layer includes following components：Al、Mg、Zn、Ga、Yb、Ti、C、Mn、Bi；Heat dissipating layer includes sequentially connected heat-conducting part, heat transfer part and radiating part, heat-conducting part connection middle layer；Heat-conducting part includes following component：Cu, Al, Mg, Fe, Mn, Ti, Cr and V；Heat transfer part includes following component：Cu, Al, Mg, Fe, Mn, Ti, Cr and V；Radiating part includes each component of following mass parts：Al, Si, Mg, Cu, Fe, Mn, Ti, Cr and V.High intensity height heat dissipation aluminum alloy die casting of the present invention, intensity is high, plasticity is high, perfect heat-dissipating.

Description

High intensity height heat dissipation aluminum alloy die casting
Technical field
Radiate aluminum alloy die casting the present invention relates to aluminum alloy die casting technical field, more particularly to high intensity height.
Background technology
Aluminium alloy is most widely used one kind non-ferrous metal structural material in industry, in Aeronautics and Astronautics, automobile, machinery It has been widely applied in manufacture, ship and chemical industry.The rapid development of industrial economy, the demand day to Welded structural member Benefit increases, and the Research on Weldability enabled aluminum alloy to is also goed deep into therewith.
Aluminium alloy has a good casting fluidity, while also fine machining property, be widely used in electronic apparatus, The fields such as hardware.With the development of automotive light weight technology, a large amount of automobile stress members urgent needs replace passing using aluminium alloy The steel of system, such as automobile control arm, knuckle, damping tower, brake caliper, have achieved the purpose that body lightening.It is but existing Although have pack alloy have good casting fluidity and machining property, generally existing intensity is relatively low, plasticity compared with The problems such as poor, it is difficult to meet requirement of the automobile to the high intensity of stress members, high breaking property and high fatigue resistance.
Moreover, when aluminium alloy is on such as engine, it is also required with certain heat sinking function, but current The heat dissipation performance of aluminium alloy is relatively low so that it uses limited.
Invention content
Based on this, the present invention provides the high intensity height of high intensity, high-ductility and perfect heat-dissipating a kind of and radiates aluminium alloy pressure Casting.
In order to achieve the object of the present invention, the present invention uses following technical scheme：
A kind of high intensity height heat dissipation aluminum alloy die casting, including：Sequentially connected supporting layer, middle layer and heat dissipating layer；
The supporting layer includes the component of following parts by weight：75-95 parts of Al, 6.5 parts -7.5 parts of Si, 0.6 part -0.9 of Mg Part, 0.3 part -0.5 part of Cu, 0.1 part -0.3 part of Ti, 0.05 part -0.15 part of Cr, 0.05 part -0.15 part of Bi, C 0.0025 Part -0.005 part, -0.01 part of As0.006 parts, Fe≤0.2 part, total impurities≤0.15 part；
The middle layer includes the component of following parts by weight：75-95 parts of Al, 8.5 parts -9.5 parts of Mg, 0.5 part -0.8 of Zn Part, 0.3 part -0.5 part of Ga, 0.4 part -0.6 part of Yb, 0.025 part -0.05 part of Ti, 0.0025 part -0.005 part of C, Mn0.65 Part -0.7 part, -0.005 part of Bi0.0025 parts, Fe≤0.2 part, total impurities≤0.15 part；
The heat dissipating layer includes sequentially connected heat-conducting part, heat transfer part and radiating part, during the heat-conducting part connection is described Interbed；The heat-conducting part includes each component of following mass parts：- 96.5 parts of Cu95 parts, 2 parts -3.2 parts of Al, 0.2 part of Mg - 0.25 part, 0.4 part -0.9 part of Fe, -0.3 part of Mn0.2 parts, 0.2 part -0.3 part of Ti, 0.1 part of 0.1 part -0.2 part of Cr and V - 0.2 part；The heat transfer part includes each component of following mass parts：45 parts -52 parts of Cu, 47 parts -54 parts of Al, 0.3 part -0.7 of Mg Part, 0.2 part -0.8 part of Fe, 0.2 part -0.5 part of Mn, 0.05 part -0.3 part of Ti, 0.05 part -0.1 part of Cr and 0.05 part of V - 0.3 part；The radiating part includes each component of following mass parts：88 parts -93 parts of Al, 5.5 parts -10.5 parts of Si, 0.3 part of Mg - 0.7 part, 0.05 part -0.3 part of Cu, 0.2 part -0.8 part of Fe, 0.2 part -0.5 part of Mn, 0.05 part -0.3 part of Ti, Cr 0.05 - 0.1 part and V 0.05 part -0.3 part of part.
Above-mentioned high intensity height heat dissipation aluminum alloy die casting, is made of, supporting layer is various supporting layer, middle layer and heat dissipating layer Element is added together, and using rational proportioning, has given full play to Zr elements to the refining effect of α-Al crystal grain, Cd elements to rich Fe Mutually the fine degenerate of eutectic Si is acted on Bi elements, significantly improves the intensity and plasticity of pack alloy so that supporting layer has There is the supporting role of high intensity；Middle layer room temperature tensile intensity is more than 340MPa, and elongation is more than 8%；200 DEG C of elevated temperature tensile Intensity is more than 280MPa, and elongation is more than 10%, has the advantages that intensity is high, plasticity is good, fine heat-resisting performance, matches with supporting layer It closes, obtains the casting of high intensity, high-ductility；The heat-conductive characteristic of the heat-conducting part of heat dissipating layer, heat transfer part and radiating part is passed successively Subtract, form heat-conductive characteristic gradient, optimize heat dissipation path, greatly improve heat dissipation performance so that the casting is applied to Automobile engine when housing when, have good heat conductivity.
In some of embodiments, the supporting layer includes the component of following parts by weight：80 parts of Al, 7 parts of Si, Mg 0.8 Part, 0.4 part of Cu, 0.2 part of Ti, 0.1 part of Cr, 0.1 part of Bi, 0.003 part of C, As0.009 parts, Fe≤0.2 part, total impurities ≤ 0.15 part.
In some of embodiments, the supporting layer includes the component of following parts by weight：75 parts of Al, 6.5 parts of Si, Mg 0.6 part, 0.3 part of Cu, 0.1 part of Ti, 0.05 part of Cr, 0.05 part of Bi, 0.0025 part of C, As0.006 parts, it is Fe≤0.2 part, miscellaneous Matter total amount≤0.15 part.
In some of embodiments, the middle layer includes the component of following parts by weight：80 parts of Al, 9 parts of Mg, Zn 0.8 Part, 0.5 part of Ga, 0.6 part of Yb, 0.05 part of Ti, 0.005 part of C, Mn0.65 parts, Bi0.003 parts, Fe≤0.2 part, impurity is total ≤ 0.15 part of amount.
In some of embodiments, the middle layer includes the component of following parts by weight：75 parts of Al, 8.5 parts of Mg, Zn 0.5 part, 0.3 part of Ga, 0.4 part of Yb, 0.025 part of Ti, 0.0025 part of C, Mn0.65 parts, Bi0.0025 parts, Fe≤0.2 part, Total impurities≤0.15 part.
In some of embodiments, the radiating part further includes 0.3 part -0.6 part of Pb.
In some of embodiments, the radiating part further includes 0.02 part -0.04 part of Nb.
In some of embodiments, the radiating part further includes 0.02 part -0.03 part of Ge.
In some of embodiments, the heat-conducting part further includes 1 part -2.5 parts of Si.
In some of embodiments, the thickness of the supporting layer is 1mm-3mm, and the thickness of the middle layer is 1mm-4mm.
Specific embodiment
For the ease of understanding the present invention, the present invention will be described more fully below.But the present invention can be with perhaps Mostly different form is realized, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is to make To the understanding more thorough and comprehensive of the disclosure.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention The normally understood meaning of technical staff is identical.Term used in the description of the invention herein is intended merely to description tool The purpose of the embodiment of body, it is not intended that in the limitation present invention.
High intensity height heat dissipation aluminum alloy die casting of the present invention, for all kinds of structural members of automobile, especially starts In the shell structure of machine etc..
Described high intensity height heat dissipation aluminum alloy die casting, including sequentially connected supporting layer, middle layer and heat dissipating layer, Supporting layer has higher intensity and plasticity for playing basic supporting role；Middle layer is articulamentum, is had higher strong Degree and plasticity；Heat dissipating layer has cooling effect, can improve the heat conductivity of entire casting.
In some embodiments, the thickness of supporting layer is 1mm-3mm, and the thickness of middle layer is 1mm-4mm.Such as it is preferably branch The thickness for supportting layer is 2mm, and the thickness of middle layer is 2mm.
Above-mentioned supporting layer is made of the component of following parts by weight：75-95 parts of Al, 6.5 parts -7.5 parts of Si, Mg 0.6 - 0.9 part of part, 0.3 part -0.5 part of Cu, 0.1 part -0.3 part of Ti, 0.05 part -0.15 part of Cr, 0.05 part -0.15 part of Bi, C 0.0025 part -0.005 part, -0.01 part of As0.006 parts, Fe≤0.2 part, total impurities≤0.15 part.Such as 75 parts of Al, 80 Part, 85 parts, 95 parts；6.5 parts, 7 parts, 7.3 parts, 7.5 parts of Si；0.6 part, 0.7 part, 0.8 part, 0.9 part of Mg；0.3 part of Cu, 0.4 Part, 0.5 part；0.1 part, 0.2 part, 0.3 part of Ti；0.05 part, 0.08 part, 0.12 part, 0.15 part of Cr；0.05 part of Bi, 0.08 Part, 0.12 part, 0.15 part；0.0025 part, 0.003 part, 0.004 part, 0.0045 part, 0.005 part of C；As0.006 parts, 0.007 Part, 0.009 part, 0.01 part.
In above-mentioned supporting layer, Si can form Al+Si eutectic liquid phases with Al, improve the die casting mobility of aluminium alloy, simultaneously also The intensity and machining property of aluminium alloy can be improved.Si contents are higher, and the die casting mobility of aluminium alloy is better, but die casting aluminium closes The plasticity of gold can decline.When the content of Si is more than 7.5%, the plasticity of aluminium alloy, which will appear, to be remarkably decreased.In order to ensure that aluminium closes Gold utensil has enough die casting mobility and plasticity, and therefore, Si contents are selected at 6.5 parts -7.5 parts.
Mg can form Mg with Si2Si hardening constituents enhance the intensity of pack alloy, and Mg contents are higher, pack alloy Intensity is also higher.But Mg contents are too high, and the die casting mobility and plasticity that can cause aluminium alloy decline.In order to ensure pack alloy Obtain enough intensity and plasticity.Therefore, the selection of Mg contents is at 0.6 part -0.9 part.
Cu both has solution strengthening effect, while CuAl is precipitated during aluminium alloy aging strengthening model2Hardening constituent, enhancing The intensity of aluminium alloy.Cu contents are higher, and the intensity of pack alloy is also higher, but when Cu contents are more than 0.5 part, it can be apparent Pack alloy corrosion resistance is reduced, increases the hot cracking tendency of aluminium alloy.Therefore, in order to ensure pack alloy obtains enough Intensity and corrosion resistance, avoid hot tearing, Cu contents are selected at 0.3 part -0.5 part.
Zr primarily serves the effect of refinement α-Al crystal grain, improves the structural constituent uniformity of pack alloy, improves die casting The intensity and plasticity of aluminium alloy.Zr contents are less than 0.1 part, and grain refining effect unobvious, Zr contents are higher, grain refining effect It is better, but Zr contents be more than 0.3 part when, also result in coarse InterMetallic Compound ZrAl3The appearance of phase deteriorates pack alloy Intensity and plasticity.The Zr of 0.1~0.3 part of addition, can be such that the α-Al crystal grain of pack alloy is refined as from coarse dendroid Fine uniform etc. shaft-like, significantly improve the structural constituent uniformity of pack alloy, improve intensity and the modeling of pack alloy Property.Therefore, the selection of Zr contents is at 0.1 part -0.3 part.
Cd primarily serves the effect of fine degenerate richness Fe phases.Fe is inevitable impurity element in aluminium alloy, is closed in aluminium Coarse needle-shaped Al-Fe-Si systems richness Fe phases are formed in gold, this coarse needle-shaped richness Fe phases seriously isolate aluminum substrate, are that aluminium closes The formation of crack and direction of crack propagation of golden forced breakage, the main reason for leading to traditional pack alloy intensity and relatively low plasticity. Inventor has found that, by adding 0.5 part -1.5 parts of Al10Cd alloys, pack alloy contains 0.05 by lot of experiments The Cd elements of -0.15 part of part, Cd elements can replace the Fe elements of rich Fe phases, change and inhibit the orientation of growth of richness Fe phases, make Rich Fe phases are eliminated the influence of coarse needle-shaped richness Fe phases, are significantly carried from the graininess that coarse needle-shaped fine degenerate is fine uniform The intensity and plasticity of high-voltage cast-aluminum alloy.
Bi primarily serves the fine degenerate effect to common reciever.Inventor had found by lot of experiments, Bi elements The fine degenerate of traditional Na, Sr element is significantly better than to the fine degenerate effect of pack alloy common reciever of the present invention Effect has the advantages that fine degenerate effect is good, the duration is long and reproducibility is good, and traditional Na, Sr element can also be avoided thin Change rotten caused air-breathing problem.1 part -3 parts of Al5Bi alloys are added, contain 0.05 part -0.15 part of Bi in pack alloy Element can make the form of eutectic Si significantly improve pack alloy from the coarse needle-shaped graininess for being changed into fine uniform Intensity and plasticity.
Fe is inevitable impurity element, and coarse needle-shaped Al-Fe-Si systems richness Fe phases are frequently formed in aluminium alloy, This coarse needle-shaped richness Fe phases seriously isolate aluminum substrate, are to lead to traditional pack alloy intensity and the relatively low main original of plasticity Cause.Inventor has found that the content of Impurity Fe must be controlled at≤0.2 part in pack alloy by lot of experiments, The Al10Cd alloys of 0.5 part -1.5 parts of addition simultaneously make rich Fe phases from the particle that coarse needle-shaped fine degenerate is fine uniform Shape can eliminate the influence of rich Fe phases, it is ensured that pack alloy obtains high intensity and plasticity.
Further, above-mentioned supporting layer further includes 0.1 part -0.3 part of Sc, and addition Sc can enhance the flexibility of aluminium alloy, So that the structure is easier punch forming；But experiment is, it was also found that if the content of Sc elements can influence to support more than 0.3 part The toughness of layer.Such as 0.1 part, 0.2 part, 0.25 part, 0.3 part of Sc.
Further, above-mentioned supporting layer further includes 0.1 part -0.3 part of Sr, and addition Sr can enhance the elongation of supporting layer Rate reduces the face crack generated in punching course.If but experiment, it was also found that Sr elements content be more than 0.3 part, ring Guarantor property is had a greatly reduced quality.Such as 0.1 part, 0.2 part, 0.3 part of Sr.
Above-mentioned middle layer is made of the component of following parts by weight:75-95 parts of Al, 8.5 parts -9.5 parts of Mg, Zn 0.5 Part -0.8 part, 0.3 part -0.5 part of Ga, 0.4 part -0.6 part of Yb, 0.025 part -0.05 part of Ti, 0.0025 part -0.005 part of C, - 0.7 part of Mn0.65 parts, -0.005 part of Bi0.0025 parts, Fe≤0.2 part, total impurities≤0.15 part.Such as 75 parts of Al, 80 Part, 85 parts, 95 parts；8.5 parts, 9 parts, 9.5 parts of Mg；0.5 part, 0.6 part, 0.7 part, 0.8 part of Zn；0.3 part of Ga, 0.4 part, 0.5 Part；0.4 part, 0.5 part, 0.6 part of Yb；0.025 part, 0.03 part, 0.04 part, 0.05 part of Ti；0.0025 part of C, 0.003 part, 0.004 part, 0.005 part；Mn0.65 parts, 0.68 part, 0.7 part；Bi0.0025 parts, 0.003 part, 0.004 part 0.005 part.
In above-mentioned middle layer, Al and Zn are main alloy elements, have solution strengthening effect in aluminium alloy, Al and Mg is also Mg can be formed17Al12Phase, Zn and Mg can also form MgZn2Phase improves the casting fluidity and intensity of aluminium alloy.
Solid solubility of the Ga and Yb in aluminium alloy is higher, can not only have been improved by solution strengthening aluminium alloy room temperature intensity but also The elevated temperature strength of aluminium alloy can be improved.In addition, the atoms permeating energy force difference of Ga and Yb, the recrystallization of aluminium alloy can be both improved Temperature and slow down recrystallization process, and highly stable disperse phase particle can be precipitated, so as to improve the elevated temperature strength of aluminium alloy And creep resistance.The content of Ga and Yb is higher, and solution strengthening and dispersion-strengthened action are stronger, the room temperature and elevated temperature strength of aluminium alloy It is all higher.But addition too many Ga and Yb can dramatically increase the production cost of aluminium alloy.Through consider intensity, heat resistance and Production cost factor, therefore, selection add 0.3 part -0.5 part of Ga and 0.4 part -0.6 part of Yb.
Ti, C are added in aluminium alloy so that aluminium alloy contains a large amount of TiC particles.TiC particles are all high, steady with fusing point The characteristics of qualitative good, particularly TiC particles and magnesium are all Patterns for Close-Packed Hexagonal Crystal structure, and lattice constant is close, lattice constant Mismatch is very low, is the excellent heterogeneous nuclei of magnesium crystal grain, can refining aluminum alloy crystal grain.Importantly, due to TiC The fusing point of particle is high, stability is good, and a large amount of TiC particles are entered in aluminium alloy, these particle distributions, can in crystal boundary and phase boundary Pinning crystal boundary and phase boundary play significant dispersion-strengthened action, so as to improve the intensity of aluminium alloy and heat resistance.
Further, above-mentioned middle layer further includes 0.3 part -0.5 part of Ce, and addition Ce can enhance the impact of middle layer Toughness reduces the face crack generated in punching course.If but experiment, it was also found that Ce elements content be more than 0.5 part, Impact flexibility does not change, but cost but accordingly increases.For example, 0.3 part, 0.35 part, 0.4 part, 0.5 part of Ce.
Further, above-mentioned middle layer further includes -1 part of W0.3 parts, addition W can enhance middle layer elevated temperature strength and Plasticity.But experiment, it was also found that if the content of W elements is more than 1 part, plasticity does not change, but cost is corresponding Increase.For example, 0.3 part, 0.5 part, 0.8 part, 1 part of W.
Above-mentioned heat dissipating layer includes sequentially connected heat-conducting part, heat transfer part and radiating part, heat-conducting part connection middle layer.
Heat-conducting part therein includes each component of following mass parts：- 96.5 parts of Cu95 parts, 2 parts -3.2 parts of Al, Mg 0.2 - 0.25 part of part, 0.4 part -0.9 part of Fe, -0.3 part of Mn0.2 parts, 0.2 part -0.3 part of Ti, 0.1 part -0.2 part of Cr and V 0.1 - 0.2 part of part.Such as Cu95 parts, 96 parts, 96.2 parts, 96.5 parts；2 parts, 2.5 parts, 3 parts, 3.2 parts of Al；0.2 part of Mg, 0.22 Part, 0.25 part；0.4 part, 0.5 part, 0.7 part, 0.9 part of Fe；Mn0.2 parts, 0.25 part, 0.3 part；0.2 part of Ti, 0.25 part, 0.3 Part；0.1 part, 0.12 part, 0.15 part, 0.2 part of Cr；0.1 part, 0.12 part, 0.15 part, 0.2 part of V.
Heat transfer part therein includes each component of following mass parts：45 parts -52 parts of Cu, 47 parts -54 parts of Al, Mg 0.3 - 0.7 part of part, 0.2 part -0.8 part of Fe, 0.2 part -0.5 part of Mn, 0.05 part -0.3 part of Ti, 0.05 part -0.1 part of Cr and V 0.05 part -0.3 part.Such as 45 parts, 48 parts, 50 parts, 52 parts of Cu；47 parts, 48 parts, 50 parts, 52 parts, 54 parts of Al；0.3 part of Mg, 0.4 part, 0.6 part, 0.7 part；0.2 part, 0.4 part, 0.6 part, 0.8 part of Fe；0.2 part, 0.3 part, 0.4 part, 0.5 part of Mn；Ti 0.05 part, 0.1 part, 0.2 part, 0.3 part；0.05 part, 0.08 part, 0.1 part of Cr；0.05 part, 0.1 part, 0.2 part, 0.3 part of V.
Radiating part therein includes each component of following mass parts：88 parts -93 parts of Al, 5.5 parts -10.5 parts of Si, Mg 0.3 part -0.7 part, 0.05 part -0.3 part of Cu, 0.2 part -0.8 part of Fe, 0.2 part -0.5 part of Mn, 0.05 part -0.3 part of Ti, Cr 0.05 part -0.1 part and V 0.05 part -0.3 part.88 parts, 90 parts, 92 parts, 93 parts of Al；5.5 parts of Si, 6 parts, 8 parts, 9.5 parts, 10.5 parts；0.3 part, 0.4 part, 0.5 part, 0.7 part of Mg；0.05 part, 0.1 part, 0.2 part, 0.3 part of Cu；0.2 part of Fe, 0.4 part, 0.6 part, 0.8 part；0.2 part, 0.3 part, 0.4 part, 0.5 part of Mn；0.05 part, 0.1 part, 0.15 part, 0.2 part, 0.3 part of Ti；Cr 0.05 part, 0.08 part, 0.09 part, 0.1 part；0.05 part, 0.08 part, 0.1 part, 0.25 part, 0.3 part of V.
Above-mentioned heat dissipating layer contains copper (Cu), and the heat conductivility of heat dissipating layer can be made to be maintained at a higher level. The coefficient of heat conduction can reach more than 380W/mK, can rapidly radiate.
Further, radiating part further includes 0.3 part -0.6 part of Pb, can improve the tensile strength of radiating part, in this way, can When striking out radiating fin, i.e. laminated structure to prevent that radiating part ought be cast, due to being pullled stress by excessive punching press And it is broken.For example, 0.3 part, 0.4 part, 0.5 part, 0.6 part of Pb.
Further, radiating part further includes 0.02 part -0.04 part of Nb.It is found through many experiments evidence and theory analysis, when When the mass parts of Nb are more than 0.02 part, the antioxygenic property of radiating part can be greatlyd improve, it will be understood that radiating part is as scattered It is more demanding to high temperature oxidation resistance with the component of contacting external air area maximum in hot device.However, when the quality of Nb When part is more than 0.04 part, the magnetism of radiating part can be caused to sharply increase, influence the performance of other parts.For example, 0.02 part of Nb, 0.03 part, 0.035 part, 0.04 part.
Further, radiating part further includes 0.02 part -0.03 part of Ge.It is found through many experiments evidence and theory analysis, when When the mass parts of Ge are more than 0.02 part, unexpected effect can be played to the raising of the heat dissipation performance of radiating part, however, working as Ge Quality accounting it is excessive, such as when the mass parts of Ge are more than 2 parts, and can increase the brittleness of radiating part.For example, 0.02 part of Ge, 0.025 part, 0.03 part.
Further, heat-conducting part further includes 1 part -2.5 parts of Si.When heat-conducting part contains suitable silicon, can not influence Under the premise of heat-conducting part heat conductivility, the hardness and abrasion resistance of heat-conducting part are effectively promoted.But through multiple theory analysis and experiment Evidence is found, when the quality of silicon in heat-conducting part is too many, such as mass percent is more than 15 parts or more, can make the appearance of heat-conducting part Black particles are distributed, and ductility reduces, are unfavorable for the production molding of heat-conducting part.For example, 1 part of Si, 1.2 parts, 1.5 parts, 2 Part, 2.5 parts.
Above-mentioned high intensity height heat dissipation aluminum alloy die casting, preparation method is, respectively by supporting layer, middle layer and heat dissipation In the melting furnace of each component input difference of layer, solution is obtained after fusing, then carries out refinement treatment, the solution then obtained pours Cast be supported in scheduled mold, after curing layer, middle layer and heat dissipating layer；Then again by supporting layer, middle layer and heat dissipation Layer integrated punching molding obtains above-mentioned high intensity height heat dissipation aluminum alloy die casting.
Above-mentioned high intensity height heat dissipation aluminum alloy die casting, is made of, supporting layer is various supporting layer, middle layer and heat dissipating layer Element is added together, and using rational proportioning, has given full play to Zr elements to the refining effect of α-Al crystal grain, Cd elements to rich Fe Mutually the fine degenerate of eutectic Si is acted on Bi elements, significantly improves the intensity and plasticity of pack alloy so that supporting layer has There is the supporting role of high intensity；Middle layer room temperature tensile intensity is more than 340MPa, and elongation is more than 8%；200 DEG C of elevated temperature tensile Intensity is more than 280MPa, and elongation is more than 10%, has the advantages that intensity is high, plasticity is good, fine heat-resisting performance, matches with supporting layer It closes, obtains the casting of high intensity, high-ductility；The heat-conductive characteristic of the heat-conducting part of heat dissipating layer, heat transfer part and radiating part is passed successively Subtract, form heat-conductive characteristic gradient, optimize heat dissipation path, greatly improve heat dissipation performance so that the casting is applied to Automobile engine when housing when, have good heat conductivity.
The implementation that will be further illustrated the present invention below by several embodiments.
Embodiment one
High intensity height heat dissipation aluminum alloy die casting described in the embodiment of the present invention, including sequentially connected supporting layer, centre Layer and heat dissipating layer, heat dissipating layer include sequentially connected heat-conducting part, heat transfer part and radiating part, heat-conducting part connection middle layer.Support Layer is made of the component of following parts by weight：80 parts of Al, 7 parts of Si, 0.8 part of Mg, 0.4 part of Cu, 0.2 part of Ti, 0.1 part of Cr, 0.1 part of Bi, 0.003 part of C, As0.009 parts, Fe≤0.2 part, total impurities≤0.15 part；Middle layer is by following parts by weight Component is made：80 parts of Al, 9 parts of Mg, 0.8 part of Zn, 0.5 part of Ga, 0.6 part of Yb, 0.05 part of Ti, 0.005 part of C, Mn0.65 Part, Bi0.003 parts, Fe≤0.2 part, total impurities≤0.15 part；Heat-conducting part includes each component of following mass parts：Cu96 parts, 0.15 part of 3 parts of Al, 0.2 part of Mg, 0.6 part of Fe, Mn0.25 parts, Ti0.25 parts, 0.15 part of Cr and V.Heat transfer part therein Include each component of following mass parts：50 parts of Cu, 50 parts of Al, 0.5 part of Mg, 0.6 part of Fe, Mn0.4 parts, 0.2 part of Ti, Cr 0.08 part and V 0.2 part.Radiating part therein includes each component of following mass parts：90 parts of Al, 8 parts of Si, 0.5 part of Mg, 0.2 part of 0.2 part of Cu, 0.5 part of Fe, 0.4 part of Mn, 0.2 part of Ti, 0.08 part of Cr and V.
Embodiment two
High intensity height heat dissipation aluminum alloy die casting described in the embodiment of the present invention, including sequentially connected supporting layer, centre Layer and heat dissipating layer, heat dissipating layer include sequentially connected heat-conducting part, heat transfer part and radiating part, heat-conducting part connection middle layer.Support Layer is made of the component of following parts by weight：75 parts of Al, 6.5 parts of Si, 0.6 part of Mg, 0.3 part of Cu, 0.1 part of Ti, Cr 0.05 Part, 0.05 part of Bi, 0.0025 part of C, As0.006 parts, Fe≤0.2 part, total impurities≤0.15 part；Middle layer is by following weight The component of part is made：75 parts of Al, 8.5 parts of Mg, 0.5 part of Zn, 0.3 part of Ga, 0.4 part of Yb, 0.025 part of Ti, C 0.0025 Part, Mn0.65 parts, Bi0.0025 parts, Fe≤0.2 part, total impurities≤0.15 part；Heat-conducting part includes each group of following mass parts Point：0.1 part of Cu95 parts, 2 parts of Al, 0.2 part of Mg, 0.4 part of Fe, Mn0.2 parts, 0.2 part of Ti, 0.1 part of Cr and V.Wherein Heat transfer part include each components of following mass parts：45 parts of Cu, 47 parts of Al, 0.3 part of Mg, 0.2 part of Fe, 0.2 part of Mn, Ti 0.05 part of 0.05 part, 0.05 part of Cr and V.Radiating part therein includes each component of following mass parts：88 parts of Al, Si 0.05 part of 5.5 parts, 0.3 part of Mg, 0.05 part of Cu, 0.2 part of Fe, 0.2 part of Mn, 0.05 part of Ti, 0.05 part of Cr and V.
Embodiment three
High intensity height heat dissipation aluminum alloy die casting described in the embodiment of the present invention, including sequentially connected supporting layer, centre Layer and heat dissipating layer, heat dissipating layer include sequentially connected heat-conducting part, heat transfer part and radiating part, heat-conducting part connection middle layer.Support Layer is made of the component of following parts by weight：95 parts of Al, 7.5 parts of Si, 0.9 part of Mg, Cu0.5 parts, 0.3 part of Ti, Cr 0.15 Part, 0.15 part of Bi, 0.005 part of C, As0.01 parts, Fe≤0.2 part, total impurities≤0.15 part；Middle layer is by following parts by weight Component be made：95 parts of Al, 9.5 parts of Mg, 0.8 part of Zn, 0.5 part of Ga, 0.6 part of Yb, 0.05 part of Ti, C0.005 parts, Mn0.7 parts, Bi0.005 parts, Fe≤0.2 part, total impurities≤0.15 part；Heat-conducting part includes each component of following mass parts： 0.2 part of Cu96.5 parts, 3.2 parts of Al, 0.25 part of Mg, 0.9 part of Fe, Mn0.3 parts, 0.3 part of Ti, 0.2 part of Cr and V.Its In heat transfer part include each components of following mass parts：52 parts of Cu, 54 parts of Al, 0.7 part of Mg, 0.8 part of Fe, Mn0.5 parts, Ti 0.3 part of 0.3 part, 0.1 part of Cr and V.Radiating part therein includes each component of following mass parts：93 parts of Al, Si 10.5 0.3 part of part, Mg0.7 parts, 0.3 part of Cu, 0.8 part of Fe, 0.5 part of Mn, 0.3 part of Ti, 0.1 part of Cr and V.
Example IV
High intensity height heat dissipation aluminum alloy die casting described in the embodiment of the present invention, what is different from the first embodiment is that supporting layer It is made of the component of following parts by weight：80 parts of Al, 7 parts of Si, 0.8 part of Mg, 0.4 part of Cu, 0.2 part of Ti, 0.1 part of Cr, Bi 0.1 part, 0.003 part of C, As0.009 parts, 0.1 part of Sc, Fe≤0.2 part, total impurities≤0.15 part；Middle layer is by following heavy The component of amount part is made：80 parts of Al, 9 parts of Mg, 0.8 part of Zn, 0.5 part of Ga, 0.6 part of Yb, 0.05 part of Ti, 0.005 part of C, Mn0.65 parts, Bi0.003 parts, 0.3 part of Ce, Fe≤0.2 part, total impurities≤0.15 part；Heat-conducting part includes following mass parts Each component：Cu96 parts, 3 parts of Al, 0.2 part of Mg, 0.6 part of Fe, Mn0.25 parts, Ti0.25 parts, 0.15 part of Cr, 2 parts of Si and 0.15 part of V.Heat transfer part therein includes each component of following mass parts：50 parts of Cu, 50 parts of Al, 0.5 part of Mg, Fe 0.6 0.2 part of part, Mn0.4 parts, 0.2 part of Ti, 0.08 part of Cr and V.Radiating part therein includes each component of following mass parts： 90 parts of Al, 8 parts of Si, 0.5 part of Mg, 0.2 part of Cu, 0.5 part of Fe, 0.4 part of Mn, 0.2 part of Ti, 0.08 part of Cr, V 0.2 Part, 0.5 part of Pb, 0.03 part of Nb.
Embodiment five
High intensity height heat dissipation aluminum alloy die casting described in the embodiment of the present invention, unlike example IV, middle layer It is made of the component of following parts by weight：80 parts of Al, 9 parts of Mg, 0.8 part of Zn, 0.5 part of Ga, 0.6 part of Yb, 0.05 part of Ti, C 0.005 part, Mn0.65 parts, Bi0.003 parts, 0.3 part of Ce, W0.5 parts, Fe≤0.2 part, total impurities≤0.15 part.
Embodiment six
High intensity height heat dissipation aluminum alloy die casting described in the embodiment of the present invention, unlike embodiment two, supporting layer It is made of the component of following parts by weight：75 parts of Al, 6.5 parts of Si, 0.6 part of Mg, 0.3 part of Cu, 0.1 part of Ti, 0.05 part of Cr, 0.05 part of Bi, 0.0025 part of C, As0.006 parts, 0.1 part of Sr, Fe≤0.2 part, total impurities≤0.15 part；Middle layer by with The component of lower parts by weight is made：75 parts of Al, 8.5 parts of Mg, 0.5 part of Zn, 0.3 part of Ga, 0.4 part of Yb, 0.025 part of Ti, C 0.0025 part, Mn0.65 parts, Bi0.0025 parts, W0.3 parts, Fe≤0.2 part, total impurities≤0.15 part；Heat-conducting part includes as follows The each component of mass parts：Cu95 parts, 2 parts of Al, 0.2 part of Mg, 0.4 part of Fe, Mn0.2 parts, 0.2 part of Ti, 0.1 part of Cr and V 0.1 part.Heat transfer part therein includes each component of following mass parts：45 parts of Cu, 47 parts of Al, 0.3 part of Mg, 0.2 part of Fe, Mn 0.05 part of 0.2 part, 0.05 part of Ti, 0.05 part of Cr and V.Radiating part therein includes each component of following mass parts：Al 88 parts, 5.5 parts of Si, 0.3 part of Mg, 0.05 part of Cu, 0.2 part of Fe, 0.2 part of Mn, 0.05 part of Ti, 0.05 part of Cr, Ge 0.02 part and V 0.05 part.
Embodiment seven
High intensity height heat dissipation aluminum alloy die casting described in the embodiment of the present invention, unlike embodiment six, radiating part Include each component of following mass parts：88 parts of Al, 5.5 parts of Si, 0.3 part of Mg, 0.05 part of Cu, 0.2 part of Fe, 0.2 part of Mn, 0.05 part of 0.05 part of Ti, 0.05 part of Cr, 0.02 part of Nb and V.
It is according to National Standard of the People's Republic of China GMN/T16865-2013, by embodiment one to embodiment seven below Pack alloy be processed into standard tensile specimen, carry out room temperature tensile on DNS500 type electronic tensile test machines, stretch speed Rate is 2 mm/mins, tests its tensile mechanical properties and heat conductivility is as shown in the table.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.

Claims (10)

  1. The aluminum alloy die casting 1. a kind of high intensity height radiates, which is characterized in that including：
    Sequentially connected supporting layer, middle layer and heat dissipating layer；
    The supporting layer includes the component of following parts by weight：75-95 parts of Al, 6.5 parts -7.5 parts of Si, 0.6 part -0.9 part of Mg, 0.3 part -0.5 part of Cu, 0.1 part -0.3 part of Ti, 0.05 part -0.15 part of Cr, 0.05 part -0.15 part of Bi, 0.0025 part of C - 0.005 part, -0.01 part of As0.006 parts, Fe≤0.2 part, total impurities≤0.15 part；
    The middle layer includes the component of following parts by weight：75-95 parts of Al, 8.5 parts -9.5 parts of Mg, 0.5 part -0.8 part of Zn, 0.3 part -0.5 part of Ga, 0.4 part -0.6 part of Yb, 0.025 part -0.05 part of Ti, 0.0025 part -0.005 part of C, Mn0.65 parts - 0.7 part, -0.005 part of Bi0.0025 parts, Fe≤0.2 part, total impurities≤0.15 part；
    The heat dissipating layer includes sequentially connected heat-conducting part, heat transfer part and radiating part, and the heat-conducting part connects the middle layer； The heat-conducting part includes the component of following parts by weight：- 96.5 parts of Cu95 parts, 2 parts -3.2 parts of Al, 0.2 part -0.25 part of Mg, Fe 0.1 part -0.2 part of 0.4 part -0.9 part, -0.3 part of Mn0.2 parts, 0.2 part -0.3 part of Ti, 0.1 part -0.2 part of Cr and V；It is described Heat transfer part includes the component of following parts by weight：45 parts -52 parts of Cu, 47 parts -54 parts of Al, 0.3 part -0.7 part of Mg, 0.2 part of Fe - 0.05 part -0.3 part of 0.8 part, 0.2 part -0.5 part of Mn, 0.05 part -0.3 part of Ti, 0.05 part -0.1 part of Cr and V；It is described to dissipate Hot portion includes the component of following parts by weight：88 parts -93 parts of Al, 5.5 parts -10.5 parts of Si, 0.3 part -0.7 part of Mg, Cu 0.05 - 0.3 part of part, 0.2 part -0.8 part of Fe, 0.2 part -0.5 part of Mn, 0.05 part -0.3 part of Ti, 0.05 part -0.1 part of Cr and V 0.05 part -0.3 part.
  2. The aluminum alloy die casting 2. high intensity height according to claim 1 radiates, which is characterized in that the supporting layer include with The component of lower parts by weight：80 parts of Al, 7 parts of Si, 0.8 part of Mg, 0.4 part of Cu, 0.2 part of Ti, 0.1 part of Cr, 0.1 part of Bi, C 0.003 part, As0.009 parts, Fe≤0.2 part, total impurities≤0.15 part.
  3. The aluminum alloy die casting 3. high intensity height according to claim 1 radiates, which is characterized in that the supporting layer include with The component of lower parts by weight：75 parts of Al, 6.5 parts of Si, 0.6 part of Mg, 0.3 part of Cu, 0.1 part of Ti, 0.05 part of Cr, Bi 0.05 Part, 0.0025 part of C, As0.006 parts, Fe≤0.2 part, total impurities≤0.15 part.
  4. The aluminum alloy die casting 4. high intensity height according to claim 1 radiates, which is characterized in that the middle layer include with The component of lower parts by weight：80 parts of Al, 9 parts of Mg, 0.8 part of Zn, 0.5 part of Ga, 0.6 part of Yb, 0.05 part of Ti, 0.005 part of C, Mn0.65 parts, Bi0.003 parts, Fe≤0.2 part, total impurities≤0.15 part.
  5. The aluminum alloy die casting 5. high intensity height according to claim 1 radiates, which is characterized in that the middle layer include with The component of lower parts by weight：75 parts of Al, 8.5 parts of Mg, 0.5 part of Zn, 0.3 part of Ga, 0.4 part of Yb, 0.025 part of Ti, C 0.0025 part, Mn0.65 parts, Bi0.0025 parts, Fe≤0.2 part, total impurities≤0.15 part.
  6. The aluminum alloy die casting 6. high intensity height according to claim 1 radiates, which is characterized in that the radiating part further includes 0.3 part -0.6 part of Pb.
  7. The aluminum alloy die casting 7. high intensity height according to claim 1 radiates, which is characterized in that the radiating part further includes 0.02 part -0.04 part of Nb.
  8. The aluminum alloy die casting 8. high intensity height according to claim 1 radiates, which is characterized in that the radiating part further includes 0.02 part -0.03 part of Ge.
  9. The aluminum alloy die casting 9. high intensity height according to claim 1 radiates, which is characterized in that the heat-conducting part further includes 1 part -2.5 parts of Si.
  10. The aluminum alloy die casting 10. high intensity height according to claim 1 radiates, which is characterized in that the thickness of the supporting layer It spends for 1mm-3mm, the thickness of the middle layer is 1mm-4mm.
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