CN105970041B - A kind of aluminum alloy materials and its centre spinning method of replacement QT500 looms pump connecting seat - Google Patents
A kind of aluminum alloy materials and its centre spinning method of replacement QT500 looms pump connecting seat Download PDFInfo
- Publication number
- CN105970041B CN105970041B CN201610489600.8A CN201610489600A CN105970041B CN 105970041 B CN105970041 B CN 105970041B CN 201610489600 A CN201610489600 A CN 201610489600A CN 105970041 B CN105970041 B CN 105970041B
- Authority
- CN
- China
- Prior art keywords
- alloy
- casting
- melt
- looms
- connecting seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
-
- 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
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- 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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- 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
- C22F1/057—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 copper as the next major constituent
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention discloses a kind of aluminum alloy materials of replacement QT500 looms pump connecting seat, it is characterised in that：Principal component content is by weight percentage：Manganese Mn:≤ 2%, cadmium Cd:0.05%~0.5%, copper Cu:4.2%~8.0% and Cu >=0.8Mn+4.05%, lithium Li：0.5%~0.8%；Lewis Acids and Bases make 120 microns of alloy mean grain size ＜, surplus is aluminium Al to total amount 1% × 10 2~2.0%.
Description
Technical field
Aluminum alloy materials the present invention relates to a kind of replacement QT500 looms pump connecting seat and preparation method thereof.
Background technology
Spheroidal graphite cast-iron（Abbreviation magnesium iron）It is one of primary base material in steel industry, is heavily used for making extensively
The more demanding parts such as stress complexity, intensity, toughness, wearability are made, such as universal machine, lifting, agricultural, automobile, casting, spinning
Knit, lathe, electric power, petrochemical industry, ship part etc., Main Morphology and type are hydraulic pressure housing, the pump housing, pipeline, valve body, cylinder body, wheel
Hub, shaft member, ball connection, driving member, suspender, hook fastener, conducting element, tumbler etc.；
Why widely used magnesium iron is, and also residing in it has the standard brand of subdivision, and every kind of trade mark defines more stringent
Accurate chemical composition combination, specification of heat treatment parameter, mechanical property and physical index etc., so as to correspond to segment application products
Class.It is shown in Table 1.
The corresponding mechanical property of the spheroidal graphite cast-iron trade mark definite 1 GB/T 1348 of table and tissue
This mechanical performance index and its criteria for classification of magnesium iron, can be used as aluminum alloy materials innovative design, raising property
Can to mark basis, can simultaneously serve as the comparison passage of " with aluminium for steel ", i.e.,：If aluminium alloy can substitute certain trade mark ball
Iron, then further replacement and the close steel of this trade mark performance, are just enough to lead a kind of trend or fashion in industrial circle.
From the perspective of natural characteristic and experience accumulation, aluminium and aluminium alloy have the advantages that a variety of compared with magnesium iron：
1. aluminum has a fabulous cryogenic property, its mechanical property is reduced and improved with temperature, in cold season and low
Warm environment has a unique advantage as structural material, and magnesium iron is then reduced with temperature and gradually occurred from toughness to brittle transformation,
Especially below brittle transition temperature, its impact value drastically declines, or even " low-temperature brittle fracture " occurs.
2. aluminium and aluminium alloy specific strength are high, there is good fracture toughness, and magnesium iron improves and elongation percentage with yield strength
Decline, the sensitiveness of stress concentration is substantially increased, show as the smaller i.e. fracture of deflection after surrendering, this " fatigue clear break "
Person's character is often that civil infrastructure integrally collapses the potential hard defects that formula is destroyed without sign suddenly, is many great serious accidents
Arch-criminal.
3. due to aluminium and aluminium alloy is big compared with the thermal capacitance of magnesium iron and steel and thermal conductivity is good, therefore its fire prevention, explosion-proof, early warning are more
It is good.
Prevent 4. the antioxidant anticorrosive of aluminium and aluminium alloy in itself is significantly larger than steel and is more suitable for progress high-tech surface
Rotten and decoration integrated processing.
5. aluminum alloying and heat treatment process are simple compared with magnesium iron, the alloying temperature of aluminium is generally below 750 DEG C, at heat
Temperature is managed between 150~600 DEG C, is divided by effect and also there was only solid solution, timeliness, several simple process of homogenizing annealing, and ball
For the alloying temperature of iron more than 1400 DEG C, heat treatment temperature is divided into Stress relieving annealing, height then at 500~1000 DEG C by effect
The a series of complex techniques such as warm graphitizing annealing, normalizing, quenching and tempering, more warm quenchings, surface hardening, thermo-chemical treatment, no
But process is complicated, equipment technology requires height, and it is also several times or even more than ten times of aluminum to consume and discharge.
From machinery（Pressure）Processing technology and equipment compare, aluminum can easily using cast, roll, squeeze, forge,
The techniques such as saw, milling, weldering, punching press, and magnesium iron is unable to extrusion process, other processing methods are also required to use the specification than aluminum
Much bigger process equipment and frock with power, to the manufacturing process of finished parts, almost each procedure link magnesium iron and steel
The power than aluminum higher will be consumed.
7. the whole life cycle applied along parts, magnesium iron are lacked because of big, heavy, perishable, easy brittle failure of its inertia etc.
Fall into, its material consumption, energy consumption and maintenance cost are significantly larger than aluminum, its value recycled is also far below aluminum.
Foregoing these steel shortcoming and the unique superior quality of aluminum, the marked improvement for " with aluminium for steel " provide
The basis of reality that civilization of human society progress is pursued.
In the technology upgrading of " with aluminium for steel ", in order to give full play to aluminium alloy with " light " the serial superior spy for representative
Property, it is necessary to it is had tremendous development in terms of " strong ", while there cannot be unacceptable manufacture cost increase, could significantly
Expand it and use field.This requires must make a breakthrough first in Al-alloy material design.
The method close examination prepared from material, since material characteristics are combined by carry the microcosmic thing of the feature of this feature
Contribute what is come, therefore it is combined to obtain good feature thing, such as high intensity, high-melting-point, high-ductility, high rigidity, corrosion resistant
Erosion etc., is the final result that various preparation methods are pursued so that, the Design of Chemical Composition of aluminium alloy and its technology of preparing there is
Close internal integrity, this uniformity, in short, being the pass how a kind of atom is combined into required " thing phase molecule "
The thing of system, i.e. material mutually can regard a kind of molecular structure as.The mixed smelting and casting crystalline of element are formulated, is fusion casting shape
The major contributing link of material of becoming a useful person phase molecule combining structure, in fusion-casting process, between the metal of solid solution crystal grain and crystal boundary
Compound molecule thing mutually determines the crystalline state combination (submicron particles of alloy:10~300 μm or so of scale), subsequent heat treatment
Or flow harden is then to fine structure (micron particles under crystalline state group frame:1~30 μm or so of scale) or even more
Microcosmic precise and tiny structure (Subnano-class or sub-micron grade particle:1 μm of scale 10nm~＜) it is adjusted and perfect, this adjustment
With perfect degree and scope, in known technology and traditional concept, it is believed that mainly as the alloy phase residing for alloy composition
The combined decision of thing that graph region gives, still, alloy phase diagram do not provide other micro- additions and exclude what is produced
Influence, with less prediction addition and the directiveness for excluding other trace elements and mutually being influenced on thing.Use for reference alloy solution chemistry
Theoretical and method improves melt structure, such as the covering of protective film, the addition of slag former, refining agent or alterant, degasification slagging-off
Purification etc., is the important technical for improving the combination of alloy crystalline state, fine structure or even more microcosmic precise and tiny structure, but these
Means, due to being to grope accumulation during prepare alloy to get, be often considered as " preparation process " rather than " into
Set up meter separately " part.
On engineer application, the size and state of aluminum alloy solution body crystal grain, and it is distributed in the intermetallic of crystal boundary
The size and form of thing, has conclusive influence to the mechanical property of alloy.Thick plane crystalline substance, dendrite, column crystal etc. are no
Ordered crystal and the thick brittle property intermetallic compound for being distributed in crystal boundary, can be the good fine structure of alloy and precise and tiny knot
Obdurability contribution of the structure to matrix all balances out, because the law of development that these coarse grains are deferred to results from casting mold cavity
Type wall life core, from the unidirectionally extended growth pattern of export-oriented liquid internal, cause the component segregation of alloy, crystallization it is thick it is unidirectional,
The non-uniform defect of macro property, so that as some common deficiencies of alloy, such as pin hole, stomata, shrinkage cavity and porosity, segregation, thick
The root of big solid solution, high hardness compound, crackle etc..The routine used at present goes bad means and the means of crystal grain thinning, such as
Add aluminium titanium boron or Al-Ti-C master alloy, best effect can only make mean grain size refine to 120~150 microns, and branch
For brilliant form often without basic transformation, this is the important bottleneck problem that alloy mechanical property improves.Because aluminium is closed
For gold, the approach that intensity and toughness improve at the same time, the only refinement of crystal grain and rounding are obtained；The adjustment of heat treatment process,
In the state of crystalline structure has determined, intensity or toughness can only be made to be optimized on one side.Therefore, it is how further thin
Change the mean grain size with rounding alloy, be the target that industrial circle is pursued all the time.
In terms of design of material angle, the problem of 211Z materials are difficult to overcome there is also some.Micro-analysis is found, is had
Bulky grain has very high titanium Ti and rare earth concentration, and as promoting the material of crystal grain refinement, this phenomenon shows Ti and rare earth
Move towards to need the opposite solved the problems, such as；And in the production process of 211Z alloy-steel castings, also occur and common aluminum alloy
The defects of equally common, including pin hole, stomata, shrinkage cavity and porosity, segregation, thick solid solution, high hardness compound, be mingled with (slag),
Cold shut, cold shot, crackle, rotten defect, solid solution deficiency and burning etc..
These defects, main cause still will start with from the chemical composition of alloy in itself and its microcosmic phase structure of formation
To study, especially the formation mechenism of thing phase molecule combining structure is furtherd investigate, can just see clearly essence, and then finds solution
Certainly problem, the effective way of elimination defect.
The spherical aberration correction scanning of very high resolution by being up to 0.08nm to aluminum bronze manganese systems (Al-Cu-Mn) alloy is saturating
The precise and tiny constituency analysis of electron microscope (STEM) is penetrated, obtains various phase structures, the Atomic Resolution established on an atomic scale
It is distributed with chemical element.Confirm wherein there are a series of hardening constituents, including well-known Al-Cu binary metastable phase (GP areas,
θ ＂, θ ＇), new disc phase and balance phase θ (Al2Cu)；Wherein inside matrix grain, a kind of forked (the T+ θ H) group of rod of new discovery
Close phase, the trunk portion T-phase of the combination phase is Al-Cu-Mn ternary phases, molecular structural formula Al20Cu2Mn3, molecule phase character is
Diameter about 100nm, length about 600~1000nm are in mandrel shape and { 010 } face coherence of its (010) face and alloy matrix aluminum；And T
The apposition growth secondary phase of Al-Cu binary of size larger (thickness about 20nm, be about 50nm) around phase, due to the secondary phase with
Other Al-Cu metastable phases (GP areas, θ ＂, θ ＇ or other disc phases) are compared in matrix, there is very big difference in structure, particularly
The other Al-Cu metastable phases thickness of thickness ratio much, therefore the present invention be referred to as θ H phases, its molecular structural formula Alx(x is likely less than Cu
2), it is a kind of richness Cu molecules.
Theoretical according to alloy strengthening, the intensity of alloy is that material median surface or dislocation movement by slip are subject to the obstruction of particle and produce
, obstruction is stronger, and the intensity of material is also bigger.And particle hinders the knot that behavior interacts with material median surface or dislocation movement by slip
Fruit, there is two kinds：One kind is that dislocation will cut through particle and continue to slide, and another kind is particle when particle strong hardness itself is not high enough
Intensity is very high, and dislocation can not be cut through, then can only bypass particle and continue to slide, and a circle dislocation ring is left around particle.
The size that two kinds of results contribute the strength of materials is obvious：Particle is cut through to the strength of materials around particle ratio
Contribution it is big；Cut through particle and be capable of providing the preferable elongation percentage of material, and will be carried due to the humidification of dislocation ring around particle
For the yield strength and tensile strength of material higher.
In the traditional concept on aluminum bronze manganese systems (Al-Cu-Mn) alloy, due to always all thinking that Al-Cu Binary-phases are
The principal element of alloy strengthening, therefore, the emphasis of investigation of materials and design concern, exactly makes each metastable state of Al-Cu Binary-phases real
Now best of breed in the alloy.Although it has also been found that there is T ternary phases, being not to be considered as contribution of the T-phase to alloy strength can be with
The combination of each metastable phase of Al-Cu binary is compared, and thinks that T-phase easily assembles to form thick brittlement phase in crystal boundary, therefore tight
Lattice control its quantity.
GP areas, θ ＂, the contribution feature of the metastable golden intensity that is involutory of the binary Al-Cu of θ ＇ or other disc shapeds belong to dislocation
Particle mode is cut through, its main feature is that disc grows bigger, cuts through more difficult, therefore the contribution to intensity is also bigger, still, works as disk
Piece greatly to a certain extent (diameter more than 150nm and thickness only has 1~3nm), the mismatch of its lattice dot matrix and matrix lattice dot matrix
Height is spent, just no longer can keep complete coherence with matrix, and gradually shows the feature of brittlement phase.Therefore, coherence should be kept again
There is the mismatch stress field of maximum to play maximum obstruction dislocation movement by slip ability, each metastable phase particles of binary Al-Cu have one most preferably
The problem of combination, while be also required to the contribution that its elongation percentage to matrix keeps larger, before this is or even from now on design of material
All the time one of main problem to be considered.
As it was previously stated, tradition magnesium iron（QT500）The loom pump connecting seat of making, is deposited during actual manufacture, use
In following defect：
1. because magnesium iron elongation percentage is relatively low, the sensitiveness of stress concentration is substantially increased, shows as deforming after surrendering
The smaller easy fracture of amount, causes the accident.
2. magnesium iron heat treatment process is complicated, equipment technology requires height, and consumes and discharge also very big.
3. the whole life cycle applied along parts, magnesium iron are lacked because of big, heavy, perishable, easy brittle failure of its inertia etc.
Fall into, its material consumption, energy consumption and maintenance cost are higher than very much, and the value that it is recycled is relatively low.
Aluminium alloy makes loom pump connecting seat and has no correlative study at home, because the limitation of common aluminum alloy basic material
Property, its mechanical property is relatively low, especially high-temperature heat-resistance performance, and the temperature born is less than 300 DEG C, has seriously affected loom pump connection
The service life of seat, or even add security risk.
The content of the invention
The technical problem to be solved in the present invention is：There is provided a kind of replacement QT500 looms pump connecting seat aluminum alloy materials and
Its preparation method, wherein addition Lewis Acids and Bases pair, effectively to expedite the emergence of critical nucleus（Obtain equiax crystal）, make alloy in solidification
It is preceding to obtain the optimal combined structure of molecule thing（(T+ θ H) combines phase）, promote alloy crystalline state to optimize, enable aluminum alloy to base material realization
The strength grade of 500MPa and higher, so as to reach the Al-alloy products that production substitutes QT500 looms pump connecting seat.
The technical scheme is that：A kind of aluminum alloy materials of replacement QT500 looms pump connecting seat, principal component content are pressed
Percentage by weight meter：Manganese Mn:≤ 2%, cadmium Cd:0.05%~0.5%, copper Cu:4.2%~8.0% and Cu >=0.8Mn+4.05%, lithium
Li：0.5%~0.8%；Lewis Acids and Bases are to total amount 1% × 10-2~2.0%, make 120 microns of alloy mean grain size ＜, surplus is
Aluminium Al.
Alloy grain is equiax crystal.
Sub-nanometer (T+ θ H) combination phase amount reaches >=2-3/square micron in alloy grain.
The Lewis Acids and Bases to one kind in the positive and negative ion body that is formed for metal and ligand binding, or it is a kind of with
Upper mixing.
Cation body, the anion body that the metal is formed with ligand binding：Cadmium anion body [Cd is closed including four cyanogen
(CN)4]2-。
The Lewis Acids and Bases pair, account for Al matrix percentage by weights, scope is by element additive amount：Cr ＜ 0.7%, Mo ＜
0.3%, [Cd (CN)4]2-＜ 0.02%.
A kind of preparation method of the aluminum alloy materials of replacement QT500 looms pump connecting seat, comprises the steps of：
(1) weight ratio is determined in the range of, element ratio, selecting one group of material combination in foregoing Lewis Acids and Bases, according to
The alloy total amount prepared is needed, extrapolates the weight of required every kind of material；
(2) toward addition aluminium ingot or molten aluminum liquid in smelting furnace, heat and simultaneously kept the temperature more than 700 DEG C；
(3) manganese Mn, cadmium Cd, copper Cu, lithium Li are added, stirring, adds selected Lewis Acids and Bases pair, or adds what is selected
Lewis Acids and Bases stir evenly combination；
(4) and then to above-mentioned alloy melt furnace refining is carried out；
(5) slagging-off, standing, sampling analysis alloy composition after refining, adjust chemical composition according to analysis result and extremely advise
In fixed deviation range；To more than 650 DEG C, aluminium alloy is come out of the stove for temperature adjustment, online degasification, slagging-off；
(6) cast：Poured into a mould using centrifugal casting.
The centrifugal casting cast, step are as follows：
(1) melt is transferred to casting ladle from holding furnace；
(2) casting mold is preheating to preference temperature；
(3) driving motor is opened, band movable belt pulley and wheel shaft rotate, and then drive the casting mold rotation being mounted on an axle；
(4) casting mold rotating speed is adjusted in 50~1500r/min, the casting ladle that verts makes melt flow into running gate system along pouring basin,
Casting mold is flowed into by running gate system, is full of casting mold cavity under the effect of casting mold rotary centrifugal force；
(5) after melt solidification completely, stop rotating, mold pickup.
(6) product, natural cooling, cleaning sand core, sawing riser, polishing overlap are taken out in die sinking；
(7) appearance quality detection：Rough casting before presentation quality inspection is carried out, should clean out it is smooth, it is non-processing
The dead head in face should be cleaned to cast(ing) surface and flush；
(8) internal soundness detects；
(9) solution treatment：The blank that casting is completed to roughing and inside and outside quality testing is sent into solid solution furnace, carries out 560 DEG C
Following solution treatment, quenches at once after the completion of insulation, uses water cooling or oil cooling；
(10) ageing strengthening：Will complete solution treatment casting be sent into aging furnace carry out ageing strengthening processing, 230 DEG C with
Lower ageing strengthening, after insulation, natural cooling of coming out of the stove；
(11) sampling analysis test verification；
(12) practical performance is verified.
Beneficial effects of the present invention：It is pointed by lewis' theory of acids and bases, molecule solution can occur in aluminium alloy melt
Body or " acid-base pair " material for contributing to (scope i.e. less than 1 nanometer) thing phase molecule structure optimization in time nano-area, application
Adjusted in the fine structure of melt nanoscale scope, be the most important creative technological means of the present invention.
By with lewis' theory of acids and bases, making the micro- addition and exclusion to carrying in relation to Lewis Acids and Bases,
Molecule disintegration and conversion occurs in aluminium alloy melt environment, (0.1nm~10nm scale models are provided in the hyperfine microcell of melt
Enclose) abundant disturbance and activation effect, reach and expedite the emergence of critical nucleus and largely formed, alloy grain degree is further refined,
Form more rounding；Optimize very small areas (micron order at the same time:1~30 μm or so of scale) and (Subnano-class is secondary in precise and tiny region
Micron order particle:1 μm of scale 10nm~＜) thing phase molecule combining structure, increase (T+ θ H) combination mutually in alloy substrate
Content, is the mechanism problem for the alloy strengthening that the present invention solves.
Due to the discovery of (T+ θ H) combination phase, in aluminium alloy strengthening design, it is possible to phase is combined by increasing (T+ θ H),
The matrix strength for enabling aluminum alloy to material obtains big lifting, is well controlled in yield strength between 400~600MPa, this
Be the invention solves engineer application problem, i.e. alternate series ductile iron material and product.
Cation body and anion body have ordinary matter can not be real alloy grain refinement as Louis " acid-base pair "
Existing excellent effect, this is because：These gas ions can be stabilized as normal material molecule at normal temperatures, and in aluminium
Molecule occurs in high temperature acid or alkali environment as alloy melt to disintegrate, generates lewis acid and lewis base；Due to being molecule solution
Body, so being a kind of " the falling apart " of the atom combining structure of secondary nanometer range, its ligand moiety is come out with gaseous exhaust, discharged
The core metal ion come is then reselected with reference to other atoms.
Disintegration and reconstruct of this generation in aluminium alloy melt, it is different from common material dissolving, because：1. under high temperature
The incipient bubble for decomposing the gaseous material formation of release only has a molecular size (being less than 1nm, i.e. secondary nanophase), specific surface area
Maximum, has the disturbance ability of extremely strong activity and nanometer range, is in the size range that crystallization critical nucleus is formed, thus
The state such as fluctuation of energy, rise and fall of structure and composition fluctuations of atom rises and falls all with extremely strong in melt superfinishing microcell caused by and
Characteristics of Mutation, promotes neighbouring more polyatom across crystallization potential barrier, so a large amount of formation of critical nucleus are particularly conducive to, to gold
The catalysis of compound reaction of formation and alloy structure crystal grain refinement all generate good better than common alterant such as aluminium titanium boron between category
Effect；Positive and negative ion body this disturbance and activation effect in the superfinishing microcell of secondary nanometer range at the same time, is conventional additional purification
What the bubble (diameter is more than 0.5mm) that gas is formed can not be realized；2. decompose release metallic atom or cation have than with
The volume of body smaller and the specific surface area of bigger, its disturbance and activation effect to neighboring atom is stronger, caused by superfinishing microcell
State fluctuating is more notable, also stronger to intermetallic compound reaction of formation catalysis and alloy substrate tissue Grain Refinement Effect；
, will not be as common gold 3. division and reconstruct of the acid-base pair in high-temperature fusant enhance scattered and diffusion velocity of the particle in microcell
Belong to or additive causes clustering like that, and restrained effectively caused by additive alloying component segregation and bulky grain matter
Point aggregation and grow up, this can effectively solve conventional grain fining agent coarsening tendency in crystallization process, such as can prevent
The roughening of titanium Ti and rare-earth phase；4. secondary reaction can also occur for ligand bubble, purification gas is accompanied after a series of changes
Discharge melt (for example generate CO2、CH4、N2、NH3Or H2S) or slag (such as Al is entered2O3、Al(HO)3Or Al4C3), it is this net
Change acts on, can be with most stable of solid-state or gaseous material, and the H dissolved in the melt and oxide impurity absorbs and decomposition,
So as to which its catharsis is more preferable than conventional gas purification mode effect.Here it is positive and negative ion body as Lewis Acids and Bases pair
Addition and exclusion, aluminium alloy melt environment occur molecule disintegrate, atom reconstruct in acid-base chemical conversion and superfinishing microcell, to provide
Abundant disturbance and activation effect in melt superfinishing microcell, reach and expedite the emergence of critical nucleus largely generation and the suppression long your writing of crystal grain
With, and realize the mechanism of more preferable clean-up effect.By this mechanism, matrix crystalline state is set generally to become equiax crystal, grain size
Averagely it is less than 120 μm, it is average at 50~100 μm that further effect of optimization can reach grain size.This effect, is to use merely
What the conventional grain such as aluminium titanium boron and aluminium titanium carbon fining agent and the gas purification technique of routine can not be realized.
Complicated ligand compound also has what ordinary matter can not be realized as Lewis Acids and Bases pair to alloy grain refinement
Good result, can be in environment as aluminium alloy melt because their molecular structure is similar with the structure of positive and negative ion body
Atom reconstruct, can also discharge gaseous state or liquid when molecule disintegrates in the middle disintegration that molecule occurs, acid-base chemical conversion and superfinishing microcell
The ligand of state, purification gas discharge melt is accompanied after series reaction and (for example generates CO2、CH4、N2、NH3Or H2S) or into
Enter slag (such as NaCl, KCl, Al (HO)3、Al2O3Or Al4C3), wherein the metallic atom or ion that discharge, non-metallic atom or
Ion, is all the ultra-fine fine particle of secondary nanophase, has the specific surface area of maximum, can provide fully disturbing in melt superfinishing microcell
Dynamic and activation effect, reaches and expedites the emergence of critical nucleus and largely generation and suppress crystal grain and grow up the mechanism of effect.By this mechanism, make
Matrix crystalline state generally becomes equiax crystal, and grain size is averagely less than 120 μm, and further effect of optimization can reach grain size and put down
At 50~100 μm, this effect, is the simple gas for using the conventional grain such as aluminium titanium boron and aluminium titanium carbon fining agent and routine
What purification techniques can not be realized.
Lewis Acids and Bases in the disturbance of nanoscale and activation effect to that can increase Subnano-class particle (T+ θ H) combination
Phase and nanoscale particle GP areas, θ ＂, the mechanism of θ ＇ tandem reinforcement phases.
To sum up, Lewis Acids and Bases pair of the present invention, can show as variform, including metal is formed with ligand binding
Positive and negative ion body, complicated ligand compound, one kind in transition group dvielement, or more than one mixing.
In common aluminum bronze manganese systems (Al-Cu-Mn) alloy, since each binary Al-Cu metastable phases are in point of intrinsic silicon
Cloth density is significantly larger than the distribution density of (T+ θ H) combination phase, causes the effect of (T+ θ H) combination phase to be blanked and never quilt
It was found that.
(T+ θ H) combination phase in θ H but with different positions to much bigger thickness, to alloy substrate generate better than with trip
GP areas existing for amorph, θ ＂, θ ＇ or other disc shapeds binary Al-Cu metastable phases reinforcing contribution.
In alloy melt, different metal atom or ion it is close, can also produce energy level splitting between them and heat occurs
Chemically react and (electronics transfer does not occur) and form the pattern of intermetallic compound, point of matrix crystalline state is different from due to foring
Minor structure, has preferable heat endurance, so it is also suitable lewis' theory of acids and bases.Such as in intermetallic compound molecule
AlxCu and Al20Cu2Mn3In, according to electronegativity size, it is known that Al is easier to lose electronics than Cu, Mn, and therefore, Al is Louis
Alkali, Cu, Mn are lewis acids, AlxCu and Al20Cu2Mn3Louis's " acid-base pair " can be regarded as.It is external in melt when adding
When Lewis Acids and Bases are to decomposing, intermetallic compound presoma that can be poor with matrix Presence of an interface is obviously also disturbed and activates
And recurring structure rises and falls, more critical nucleus are produced, makes the concentration of (T+ θ H) combination mutually in the alloy and is evenly distributed density,
Make up to 1/[μm]2More than, here it is Lewis Acids and Bases to Asia can be increased in the disturbance of nanoscale and activation effect
Nanoscale particle (T+ θ H) combination phase and nanoscale particle GP areas, θ ＂, the mechanism of θ ＇ tandem reinforcement phases.
Further, since Lewis Acids and Bases are to being capable of providing foreign peoples's material concentration to alloy melt bigger, therefore increase
The constitutional supercooling degree of melt crystallization process, causes nucleus quickly to cross critical dimension under stronger crystallization power, and in supercooling
Freely it is nucleated and grows in liquid, being formed has isotropism and shape closer to spherical equi-axed crystal；Due to equiax crystal
It is this because of the free growing endogenetic forming mechanism of liquid internal, change the irregular crystal edge such as plane crystalline substance, dendrite, column crystal
In type wall life core, the unidirectionally extended growth pattern of extroversion liquid internal, therefore avoid or alleviate alloy certainly of casting mold cavity
Component segregation, thick unidirectional, the non-uniform defect of macro property of crystallization, so that some for effectively avoiding or alleviating alloy are common
Defect, such as pin hole, stomata, shrinkage cavity and porosity, segregation, thick solid solution, high hardness compound, crackle.
Due to (T+ θ H) combine mutually with Al-Cu binary disperse phase θ ' at different levels, θ ", GPI areas successively respectively have sub-micron grade,
Subnano-class and nano level distortion of lattice effect, as long as if technical solution of the present invention is the quantity of (T+ θ H) combination phase in matrix
Improved with distribution density, can be achieved with arranging in pairs or groups in terms of size, quantity and distribution with Al-Cu binary disperse phase relatively equal
Even, compact-sized, then it will produce most strong distortion of lattice stress field between each other（Maximum dot matrix mismatch）, while again and base
Body overall coherence or half coherence completely, therefore a three-dimensional elastoplasticity net battle array is formd in whole crystal grain three dimensions, whole
A intra-die generates the hierarchical reinforced structure of similar " armored concrete " to fabric structure humidification（Hereinafter referred to as
" class concrete reinforced structure "）, substantially improve the mechanical property of alloy；This superlastic modeling equally distributed in the range of crystal particle scale
Property tension structure have and can effectively transfer particle as much as possible and participate in resisting, share and absorbing external impact momentum jointly
（Dynamic And Static Loads）Ability so that it is microcosmic it is upper there is powerful fatigue resistance, macroscopically there is high-strength, high-ductility, high by firmly " three
The feature of height unification ", this " class concrete reinforced structure " is with there was only globular graphite and iron-based body in the spheroidal graphite cast-iron of steel material class
Two kinds of parallel constructions and grain size must change between 15~500 μm can not be improved jointly with obtaining strong hardness and toughness（One side
Raising premised on reducing the opposing party）Matrix characteristics compare, it is clear that have higher engineering application value.
According to lewis' theory of acids and bases, aluminum melt is an electron rich high temperature system, that is, belongs to strong lewis base, served as
After the copper manganese of amount adds, since the electronegativity of copper manganese is stronger, the more electron cloud of suction, makes the alkali of alloy melt to be formed
Property reduce, surface tension increase, be unfavorable for the generation of critical nucleus；After adding electron rich material, the acid effect of copper manganese is balanced
Should, the interfacial tension that original nucleus faces reduces, thus the original nucleus for promoting the trunk T-phase of (T+ θ H) combination phase is grown into
Critical nucleus, so as to determine that mutually quantity and distribution density significantly improve in the alloy for (T+ θ H) combination.
Inventive formulation is configured as one of technical way, is to combine the crystalline state of alloy to realize mean grain size ＜
Under the premise of 120 microns of equiax crystal, can also realize inside alloy grain (T+ θ H) combination phase amount 2-3/[μm]2More than.
Therefore, principal component is designed as by weight percentage：Manganese Mn:≤ 2%, cadmium Cd:0.05%~0.5%, copper Cu:4.2%~8.0% and Cu
>=0.8Mn+4.05%, lithium Li：0.5%~0.8%；Lewis Acids and Bases are to total amount 1% × 10-2~2.0%, make alloy mean grain size
120 microns of ＜, surplus are aluminium Al.Trace additives of the transition group dvielement lithium Li as complex alloys are added, are being closed
Al is formed in gold2Li3、AlLi5Deng 5 kinds of dispersivity High-Temperature Strengthening phases, the hardness and corrosion resisting property of alloy can be improved.
Embodiment
The specific embodiment of the invention includes 2 parts, and Part I is prompting and explanation, and Part II is specific implementation
Example.
Part I：Prompting and explanation
The step of alloy melt prepares：
(1) weight ratio is determined in the range of, element ratio, selecting one group of material combination in foregoing Lewis Acids and Bases, according to
The alloy total amount prepared is needed, extrapolates the weight of required every kind of material, works out alloy production list of ingredients, and select by list of ingredients
The various stocks of foot；
(2) toward suitable aluminium ingot or molten aluminum liquid is added in smelting furnace, heating is allowed to completely melt and protect more than 700 DEG C
Temperature；To prevent melt from sucking excessive air, fusion process should as far as possible in a short time with completed in enclosed environment；
(3) manganese Mn, cadmium Cd, copper Cu, lithium Li are added by formula rate, after stirring evenly, adds selected Lewis Acids and Bases
It is right, or selected Lewis Acids and Bases are added to combination, stir evenly；
If the Lewis Acids and Bases pair are either combined can be directly added into melt or to press auxiliary square in solid block
Formula adds melt；
If the Lewis Acids and Bases pair or combination are in solid filament wire, can cast with on-line automatic wire feeding mode
When be continuously added to, or be cut into suitable segment, add casting ladle before each casting or scoop wooden dipper；
If the Lewis Acids and Bases pair either combine in solid powdery can select directly to blow to melt or with
The fluidized regime that protective gas drives continuously blows, and described blow can select to blow from melt upper vertical insertion melt
Send, blow from furnace body side oblique cutting melt or blowed from furnace bottom air brick hole；
The Lewis Acids and Bases pair, the selection of active metal element add melt, high-melting-point insoluble metal member in the form of protecting
Element selection complex form, readily soluble heavy metal select elemental stage；
Solid powder form is made in advance in the Lewis Acids and Bases pair or combination, compound or complex selection；
The Lewis Acids and Bases pair or combination, select to add melt after the completion of alloy host element melting, or molten
Body adds melt when refining, and either adds melt after refining purifies or melt is added before cast form；
(4) and then to above-mentioned alloy melt furnace refining is carried out, the refining selection operates in enclosed environment, the envelope
Close environmental selection and the exhaust gas that refining produces continuously is excluded in a manner of exhausting；
(5) slagging-off, standing, sampling analysis alloy composition after refining, adjust chemical composition according to analysis result and extremely advise
In fixed deviation range；
The adjustment selection of chemical composition is adjusted in a manner of adding Lewis Acids and Bases pair or combination；
To more than 650 DEG C, aluminium alloy is come out of the stove for temperature adjustment, online degasification, slagging-off；
The degasification can select the agitation of graphite-pipe sleeve rotor to be blown into purification gas；
The purification gas can select nitrogen, argon gas, chlorine or their mixture；
The slagging-off can select surface either to select filtration method to remove thick particle or melt in melt except removing dross
The sediment of bottom；
The filtration method can select ceramic filter plate either glass fibre or filter cloth as filter medium；
The filtering can carry out single-stage filtering either double-stage filtering or multistage filtering；
The thick particle can be the particle that granularity is not less than 10 microns；
(6) cast：Centrifugal casting cast is selected, step is as follows：
(1) melt is transferred to casting ladle from holding furnace；
(2) casting mold is preheating to preference temperature；
(3) driving motor is opened, band movable belt pulley and wheel shaft rotate, and then drive the casting mold rotation being mounted on an axle；
(4) casting mold rotating speed is adjusted in 50~1500r/min, the casting ladle that verts makes melt flow into running gate system along pouring basin,
Casting mold is flowed into by running gate system, is full of casting mold cavity under the effect of casting mold rotary centrifugal force；
(5) after melt solidification completely, stop rotating, mold pickup.
(6) product, natural cooling, cleaning sand core, sawing riser, polishing overlap are taken out in die sinking；
(7) appearance quality detection：Rough casting before presentation quality inspection is carried out, should clean out it is smooth, it is non-processing
The dead head in face should be cleaned to cast(ing) surface and flush；
(8) internal soundness detects；
(9) solution treatment：The blank that casting is completed to roughing and inside and outside quality testing is sent into solid solution furnace, carries out 560 DEG C
Following solution treatment, quenches at once after the completion of insulation, uses water cooling or oil cooling；
(10) ageing strengthening：Will complete solution treatment casting be sent into aging furnace carry out ageing strengthening processing, 230 DEG C with
Lower ageing strengthening, after insulation, natural cooling of coming out of the stove；
(11) sampling analysis test verification；
(12) practical performance is verified.
Part II：Specific embodiment
Embodiment 1
1st, the aluminium alloy loom pump connecting seat material component percentage by weight of replacement QT500 a kind of is：Manganese Mn:0.8%, cadmium
Cd:0.28%, copper Cu:6.3%, lithium Li：0.7%, B：0.01%, Cr：0.6%, Be：0.02%, Mo：0.2%, [Cd (CN)4]2-：
0.01%；
2nd, preparation method：Melt → cast → rotation cavity → mold filling and solidification → stalling die sinking pickup → solid solution → timeliness
（1）Melt cast temperature >=720 DEG C；
（2）Mold preheating temperature >=400 DEG C；
（3）Filling time≤10s；
（4）Cavity 500~700r/min of rotating speed, the min of retention time >=5；
（5）Heat treatment：T6 (solid solution adds full artificial aging)；
3rd, cast microstructure index：Metallographic structure is equiax crystal, 80-90 μm of mean grain size, (T+ θ H) group in crystal grain
Close phase amount 3/[μm]2；
4th, casting mechanical performance：:Tensile strength 550Mpa, 340 Mpa of yield strength, elongation after fracture 8.4%, Bu Shi is hard
Degree 152.
Embodiment 2
1st, the aluminium alloy loom pump connecting seat material component percentage by weight of replacement QT500 a kind of is：Manganese Mn:0.9%, cadmium
Cd:0.25%, copper Cu:6.5%, lithium Li：0.5%, B：0.01%, Cr：0.5%, Be：0.02%, Mo：0.2%, [Cd (CN)4]2-：
0.02%；
2nd, specific preparation method is same as Example 1；
3rd, cast microstructure index：Metallographic structure is equiax crystal, 80-95 μm of mean grain size, (T+ θ H) group in crystal grain
Close phase amount 3/[μm]2；
4th, casting mechanical performance：:Tensile strength 560Mpa, 360 Mpa of yield strength, elongation after fracture 8.1%, Bu Shi is hard
Degree 155.
Embodiment 3
1st, the aluminium alloy loom pump connecting seat material component percentage by weight of replacement QT500 a kind of is：Manganese Mn:0.9%, cadmium
Cd:0.25%, copper Cu:5.5%, lithium Li：0.6%, [Cd (CN)4]2-：0.018%；
2nd, specific preparation method is same as Example 1；
3rd, cast microstructure index：Metallographic structure is equiax crystal, 80-95 μm of mean grain size, (T+ θ H) group in crystal grain
Close phase amount 2/[μm]2；
4th, casting mechanical performance：:Tensile strength 530Mpa, 340 Mpa of yield strength, elongation after fracture 8.1%, Bu Shi is hard
Degree 139.
Claims (6)
- A kind of 1. aluminum alloy materials of replacement QT500 looms pump connecting seat, it is characterised in that：Principal component content is by weightMeasure percentages：Manganese Mn:≤ 2%, cadmium Cd:0.05%~0.5%, copper Cu:4.2%~8.0% and Cu >=0.8Mn+4.05%, lithium Li：0.5%~0.8%；Additive total amount 1% × 10-2~2.0%, make 120 microns of alloy mean grain size ＜, surplus is aluminium Al； Sub-nanometer (T+ θ H) combination phase amount reaches 2-3/square micron in alloy grain；Sub-nanometer (T+ θ H) combines in alloy grain The molecular structural formula of phase is (Al20Cu2Mn3+AlxCu), the thickness that wherein x is less than 2, θ H phases is 20nm, a length of 50nm；It is described to add It is one kind in the positive and negative ion body that metal is formed with ligand binding to add agent, or more than one mixing.
- 2. a kind of aluminum alloy materials of replacement QT500 looms pump connecting seat according to claim 1, its featureIt is：Alloy grain is equiax crystal.
- 3. a kind of aluminum alloy materials of replacement QT500 looms pump connecting seat according to claim 1, its featureIt is：Cation body, the anion body that the metal is formed with ligand binding：Cadmium anion body [Cd is closed including four cyanogen (CN)4]2-。
- 4. a kind of aluminum alloy materials of replacement QT500 looms pump connecting seat according to one of claim 1-3,It is characterized in that：The additive, accounts for Al matrix percentage by weights, scope is by element additive amount：Cr ＜ 0.7%, Mo ＜ 0.3%, [Cd (CN)4]2-＜ 0.02%.
- A kind of 5. preparation side of the aluminum alloy materials of replacement QT500 looms pump connecting seat as claimed in claim 4Method, it is characterised in that：Comprise the steps of：(1) in the range of aforementioned additive, element ratio, one group of material combination is selected, weight ratio is determined, prepares as needed Alloy total amount, extrapolates the weight of required every kind of material；(2) toward addition aluminium ingot or molten aluminum liquid in smelting furnace, heat and simultaneously kept the temperature more than 700 DEG C；(3) manganese Mn, cadmium Cd, copper Cu, lithium Li are added, stirring, adds selected additive, or adds selected additive group Close, stir evenly；(4) and then to above-mentioned alloy melt furnace refining is carried out；(5) slagging-off after refining, stand, sampling analysis alloy composition, and chemical composition is adjusted to defined according to analysis result In deviation range；To more than 650 DEG C, aluminium alloy is come out of the stove for temperature adjustment, online degasification, slagging-off；(6) cast：Poured into a mould using centrifugal casting.
- A kind of 6. preparation side of the aluminum alloy materials of replacement QT500 looms pump connecting seat according to claim 5Method, it is characterised in that：The centrifugal casting cast, step are as follows：(1) melt is transferred to casting ladle from holding furnace；(2) casting mold is preheating to preference temperature；(3) driving motor is opened, band movable belt pulley and wheel shaft rotate, and then drive the casting mold rotation being mounted on an axle；(4) casting mold rotating speed is adjusted in 50~1500r/min, and the casting ladle that verts makes melt flow into running gate system along pouring basin, passes through Running gate system flows into casting mold, is full of casting mold cavity under the effect of casting mold rotary centrifugal force；(5) after melt solidification completely, stop rotating, mold pickup；(6) product, natural cooling, cleaning sand core, sawing riser, polishing overlap are taken out in die sinking；(7) appearance quality detection：Rough casting before presentation quality inspection is carried out, should clean out it is smooth, non-processing face Dead head should be cleaned to cast(ing) surface and flush；(8) internal soundness detects；(9) solution treatment：The blank that casting is completed to roughing and inside and outside quality testing is sent into solid solution furnace, carries out less than 560 DEG C Solution treatment, quenches at once after the completion of insulation, uses water cooling or oil cooling；(10) ageing strengthening：The casting that will complete solution treatment is sent into aging furnace and carries out ageing strengthening processing, when below 230 DEG C Effect is strengthened, after insulation, natural cooling of coming out of the stove；(11) sampling analysis test verification；(12) practical performance is verified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610489600.8A CN105970041B (en) | 2016-06-29 | 2016-06-29 | A kind of aluminum alloy materials and its centre spinning method of replacement QT500 looms pump connecting seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610489600.8A CN105970041B (en) | 2016-06-29 | 2016-06-29 | A kind of aluminum alloy materials and its centre spinning method of replacement QT500 looms pump connecting seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105970041A CN105970041A (en) | 2016-09-28 |
| CN105970041B true CN105970041B (en) | 2018-05-11 |
Family
ID=57020215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610489600.8A Active CN105970041B (en) | 2016-06-29 | 2016-06-29 | A kind of aluminum alloy materials and its centre spinning method of replacement QT500 looms pump connecting seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105970041B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088825B (en) * | 2021-04-14 | 2023-02-28 | 江苏永钢集团有限公司 | Medium carbon microalloyed steel and method for eliminating mixed crystal structure thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2915391A (en) * | 1958-01-13 | 1959-12-01 | Aluminum Co Of America | Aluminum base alloy |
| CN103060644A (en) * | 2011-10-24 | 2013-04-24 | 贵州华科铝材料工程技术研究有限公司 | Aluminum alloy material processed by cyano complex and preparation method of aluminum alloy material |
| CN103160715A (en) * | 2011-12-19 | 2013-06-19 | 中国兵器工业第五二研究所 | Graded aluminium alloy cylinder liner material and preparing method thereof |
-
2016
- 2016-06-29 CN CN201610489600.8A patent/CN105970041B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2915391A (en) * | 1958-01-13 | 1959-12-01 | Aluminum Co Of America | Aluminum base alloy |
| CN103060644A (en) * | 2011-10-24 | 2013-04-24 | 贵州华科铝材料工程技术研究有限公司 | Aluminum alloy material processed by cyano complex and preparation method of aluminum alloy material |
| CN103160715A (en) * | 2011-12-19 | 2013-06-19 | 中国兵器工业第五二研究所 | Graded aluminium alloy cylinder liner material and preparing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105970041A (en) | 2016-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106119621B (en) | A kind of replacement aluminum alloy materials of QT450 braking automobile pump cases and its model casting forming method | |
| CN105970010B (en) | A kind of aluminum alloy materials and its gravity casting method substituting QT400 light-duty vehicle steering gears | |
| CN105970047B (en) | A kind of aluminum alloy materials and its investment casting method for substituting QT500 agricultural machinery speed reducing machines | |
| CN105937000B (en) | A kind of aluminum alloy materials and its centre spinning method substituting QT400 ship columns | |
| CN105970041B (en) | A kind of aluminum alloy materials and its centre spinning method of replacement QT500 looms pump connecting seat | |
| CN105936999B (en) | A kind of aluminum alloy materials and its gravity casting method substituting QT450 Huff pipes | |
| CN105937003B (en) | A kind of aluminum alloy materials and its centrifugal casting forming method substituting QT500 major diameters transmission wheel disc | |
| CN105937002B (en) | A kind of aluminum alloy materials and its injection molding method substituting QT600 rolls | |
| CN105970039B (en) | A kind of aluminum alloy materials and its centre spinning method for substituting QT500 loom wheel hubs | |
| CN105936998B (en) | A kind of replacement aluminum alloy materials of QT450 automobile turbocharger housings and its sand casting forming method | |
| CN105970052B (en) | A kind of aluminum alloy materials and its sand mould casting method for substituting QT500 heavy type car steering gears | |
| CN106119634B (en) | A kind of aluminum alloy materials and its gravity casting method substituting QT500 filters | |
| CN105970042B (en) | A kind of aluminum alloy materials and its metal mold gravity casting method substituting QT450 loom balance weights | |
| CN106167869B (en) | A kind of aluminum alloy materials and its metal mold gravity casting method substituting QT500 loom jet parts | |
| CN105937001B (en) | A kind of aluminum alloy materials and its method for forging and molding for substituting QT600 blade of wind-driven generator | |
| CN106119639B (en) | A kind of aluminum alloy materials and its extrusion process for substituting QT500 transmission shafts | |
| CN105936997B (en) | A kind of aluminum alloy materials and its pressure casting forming method for substituting QT500 automobile axle housings | |
| CN106119635B (en) | A kind of replacement QT400 aluminium alloys flywheel caliper material and its gravitational casting forming method | |
| CN105970043B (en) | A kind of aluminum alloy materials and its high-pressure casting method of replacement QT500 Flange filters | |
| CN105970050B (en) | A kind of aluminium alloy crane arm material and its sand mould casting method for substituting QT500 | |
| CN105970040B (en) | A kind of replacement QT500 throws a spear the aluminum alloy materials and its centre spinning method of disk | |
| CN105970055B (en) | A kind of aluminum alloy materials and its centre spinning method substituting QT450 air caps | |
| CN105970048B (en) | A kind of replacement aluminum alloy materials of the full hydrostatic drives of QT500 agricultural machinery and its liquid forging casting method | |
| CN105937004B (en) | A kind of aluminum alloy materials and its gravity casting method substituting QT500 high pressure method orchids | |
| CN106065446B (en) | A kind of aluminum alloy materials and its sand mould casting method substituting QT400 well lids |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |