CN104057067A - Method for suppressing brittle compounds on liquid and solid compound interface of magnesium/aluminum double metal - Google Patents
Method for suppressing brittle compounds on liquid and solid compound interface of magnesium/aluminum double metal Download PDFInfo
- Publication number
- CN104057067A CN104057067A CN201410312010.9A CN201410312010A CN104057067A CN 104057067 A CN104057067 A CN 104057067A CN 201410312010 A CN201410312010 A CN 201410312010A CN 104057067 A CN104057067 A CN 104057067A
- Authority
- CN
- China
- Prior art keywords
- aluminium alloy
- solid
- bimetallic
- alloy workpiece
- tube chamber
- 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.)
- Granted
Links
Landscapes
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention discloses a method for suppressing brittle compounds on a liquid and solid compound interface of magnesium/aluminum double metal. The method is characterized in that a solid aluminum alloy workpiece containing the added cheap element Si with the weight percentage of 7.5-17.0% is subjected to surface pretreatment through a zincate process and an electroplating process; next, a liquid-state magnesium alloy is cast on the solid aluminum alloy workpiece to form a Mg/Al double-metal cladding material with aluminum clad with magnesium; the Mg/Al double-metal cladding material is placed in a chamber type resistance furnace for heat preservation for 2-3 hours at the temperature ranging from 410 DEG C to 430 DEG C; the Mg/Al double-metal cladding material is taken out and cooled in the air to the room temperature, and then the Mg/Al double-metal cladding material with optimized interface structure properties is obtained. The method is simple in process, suitable for preparation of the Mg/Al double-metal cladding material with a complex shape and capable of being used for producing parts and components such as automobile engine cylinder covers, crank cases and gear cases.
Description
Technical field
The invention belongs to non-ferrous metals casting method and technology field, be specifically related to the method for the liquid-solid composite interfacial brittle compound that suppresses magnesium alloy and silicon aluminum alloy.
Background technology
Economizing on resources and reducing environmental pollution is World Auto Industry circle two large problems urgently to be resolved hurrily, and automotive light weight technology is to realize energy-conservation and effective way environmental protection.Automotive light weight technology is for saving the energy, reduce discharge, realizing the strategy of sustainable development and have very positive meaning.The development of automotive light weight technology technology has promoted further investigation and the application of Birmasil and magnesium alloy, also aluminium alloy and magnesium-alloy material quality has been proposed to requirements at the higher level simultaneously.As the lightest novel green structural timber, aboundresources, density are low, vibration damping and noise reducing ability strong and be easy to the advantages such as regeneration owing to having for magnesium alloy, all have broad application prospects in fields such as Aero-Space, auto industry, telecommunications.But because corrosion resistance of magnesium alloy is poor and mechanical behavior under high temperature is excellent not, cause its application in the field such as automobile and aviation to be subject to restriction significantly.Aluminium alloy also has higher specific strength and has good surface modificability, and aluminium surface easily forms fine and close oxide-film simultaneously, has good corrosion resistance.At present in various light metals aluminium alloy still in occupation of leading position, if magnesium alloy and these two kinds of dissimilar metals of aluminium alloy are combined, form magnesium/aluminium plied timber, give full play to both performance advantages separately, can be more widely used in above multiple fields.
At present, how to realize by welding method about the composite joint of Mg/Al bimetal structure both at home and abroad, mainly contain the methods such as gas tungsten arc welding (TIG weldering), Laser Welding, soldering, diffusion welding (DW).But magnesium and aluminum chemistry Performance Ratio are more active, there will be the defects such as oxidation, crackle and pore in welding process.Simultaneously, because aluminium alloy and magnesium alloy all belong to eutectic alloy, when composite joint, interface very easily produces a large amount of intermetallic compounds, has seriously reduced the binding ability of Mg/Al plied timber.
In recent years, German BMW AG develops a kind of Mg/Al bimetal composite engine crankshaft box in the world first.According to U.S.'s " international automobile IEEE technical papers " (SAE Technical Papers, 2006, 01, 0069) " the Mg-Al composite crankcase of BMW, state-of-the-art light metal casting and manufacturing industry " (BMW ' sMagnesium-Aluminium Composite Crankcase, State-of-the-Art Light Metal Casting andManufacturing) middle introduction, the inner liner portion of this Mg/Al compound camshaft casing adopts aluminum alloy materials manufacture, comprise cylinder barrel working surface, water jacket, crankshaft main bearing pedestal is together with its threaded connection place and cylinder cap threaded connection place etc.Then form the Mg/Al compound camshaft casing of magnesium metallized aluminum by pressure casting method diecast magnesium alloy on aluminium alloy lining.This composite structural part is given full play to the two performance advantage separately of aluminium alloy and magnesium alloy.Liner aluminium alloy has met the requirement of engine cylinder-body service behaviour, and peripheral Structure of magnesium alloy has realized the loss of weight of crankcase.This new method of utilizing extrusion process to produce Mg/Al plied timber, belongs to " liquid-solid casting combination process ", and this technique provides a kind of new approach for the mass production of Mg/Al bimetallic composite component.
The liquid-solid casting bimetal compound interface of magnalium equally very easily produces frangible compounds.When liquid magnesium and solid aluminium compound tense, its interface, because heat effect makes the counterdiffusion of alloying element phase and enrichment, even makes solid aluminium alloy surface local micro-molten, causes the increase greatly containing Al amount in the Mg aluminium alloy of interface.Known according to Al-Mg alloy phase diagram, after measuring high Mg aluminium alloy and solidify containing Al, in its solidified structure, can produce a large amount of frangible compounds Al
12mg
17and Al
3mg
2.These a large amount of frangible compounds even likely become matrix, have seriously reduced the bond strength of Mg/Al bimetallic compound interface, have greatly increased interfacial brittle.Therefore, study the method that the liquid-solid compound interface frangible compounds of a kind of Mg/Al of inhibition bimetallic forms, prepare the Mg/Al bimetallic plied timber of interfacial combined function excellence, significant to the extensive use of magnesium, aluminium and alloy xenogenesis plied timber thereof.
Summary of the invention
The object of the invention is to propose the method for the liquid-solid compound interface frangible compounds of a kind of Mg/Al of inhibition bimetallic, to overcome the shortcoming that the liquid-solid composite joint boundary strength of existing Mg/Al bimetallic is low, fragility is large, effectively reduce the frangible compounds in compound interface, the Mg/Al bimetallic plied timber that obtains Interface Microstructure performance optimization, can meet the instructions for use aborning of Mg/Al xenogenesis composite construction.
The present invention suppresses the method for the liquid-solid compound interface frangible compounds of Mg/Al bimetallic, it is characterized in that concrete operation step is as follows:
The first step, elder generation add cheap elements Si in aluminium alloy: after commercial aluminum alloy is melted completely, add the industrial crystallization silicon of percentage by weight 7.5-17.0%, after all dissolving, stir so that its homogenising, then drag for the residue on aluminium alloy surface, be poured into immediately and in metal mold or sand mold, carry out gravitational casting and form solid aluminium alloy workpiece;
Second step, adopt zincate technique and electroplating technology to carry out surface preparation the solid aluminium alloy workpiece of above-mentioned formation: first solid aluminium alloy surface to be polished to surface smoothness>=6 grade, then the alcohol that is 55%-60% with concentration of volume percent cleans, then cleans with distilled water; Again solid aluminium alloy workpiece is immersed in and in acetone, carries out Ultrasonic Cleaning; The mixed solution containing 20g/L NaOH and 5g/L sodium fluoride of again solid aluminium alloy workpiece being put into 60-80 DEG C soaks 5-10s, then takes out to immerse in distilled water and cleans; The mixed solution that the hydrofluoric acid that the red fuming nitric acid (RFNA) that again solid aluminium alloy workpiece to be put into by concentration expressed in percentage by weight be 65% and concentration expressed in percentage by weight are 40% is prepared taking volume ratio as 3:1 soaks 5-10s, after taking-up, cleans with distilled water; Then solid aluminium alloy workpiece is immersed in the mixed solution that contains 320g/L NaOH, 50g/L zinc oxide, 10g/L sodium potassium tartrate tetrahydrate and 1g/L ferric trichloride of 25-30 DEG C and soaks 30-45s, then take out and clean with distilled water; Finally the solid aluminium alloy workpiece after cleaning is put into the mixed solution that contains 200g/L potassium chloride, 60g/L zinc chloride and 20g/L boric acid preparing in advance, taking current strength as 0.5-5A/dm
2, 20-30 DEG C electroplate 10-15min;
The 3rd step, solid aluminium alloy workpiece and magnesium alloy through above-mentioned surface preparation are placed in respectively to the sealable external diameter 55mm in same two ends for 3-7:1 in mass ratio, internal diameter 50mm, both sides in the quartzy tube chamber (A) of long 570mm, wherein solid aluminium alloy workpiece (B) is placed on one of a side in quartzy tube chamber (A) movably in pallet (C), magnesium alloy (D) is placed in an internal diameter 6-8mm of the interior opposite side of quartzy tube chamber (A), in the little quartz ampoule (E) of long 290mm, to install sealed at both ends, first adopt mechanical pump to vacuumize and be no less than 15min quartzy tube chamber (A), adopt again molecular pump to be evacuated to and be not less than 5 × 10
-3pa, is filled with inert gas Ar to 0-0.12Mpa afterwards again,
The 4th step, control is placed in outer resistance furnace (G) the heated quarty tube chamber (A) of quartzy tube chamber (A) after 650 DEG C～700 DEG C, mobile pallet (C) by solid aluminium alloy workpiece (B) move to quartzy tube chamber (A) central authorities be positioned at little quartz ampoule (E) loophole under be preheating to after 550 DEG C-580 DEG C of design temperatures, (F) liquid magnesium alloy (D) of fusing is squeezed and dropped on solid aluminium alloy workpiece (B) by the graphite " piston " in little quartz ampoule (E) again, realize Mg/Al bimetallic liquid-solid compound, be cooled to below 100 DEG C with the air cooling zone that moves to a side in quartzy tube chamber by this Mg/Al bimetallic plied timber, obtain interface in conjunction with good Mg/Al bimetallic plied timber,
The 5th step, the Mg/Al bimetallic plied timber of above-mentioned formation is heated to 410 DEG C-430 DEG C again, insulation 2-3h, then takes out Mg/Al bimetallic plied timber air cooling to room temperature, obtains the Mg/Al bimetallic plied timber of Interface Microstructure performance optimization.
Compared with existing Mg/Al bimetallic plied timber, above-mentioned process of the present invention, owing to adding cheap elements Si in aluminium alloy, utilizes Si and Mg to form Mg at compound interface
2si continuous phase, thus the generation of the liquid-solid compound interface frangible compounds of Mg/Al bimetallic effectively suppressed, form good metallurgical bonding interface.Can make continuous N g by heat treatment method simultaneously
2si changes tiny, subglobose Mg mutually into
2si phase, has realized the solution strengthening at interface, finally obtains the bimetallic joint product that Interface Microstructure performance is optimized.Compared with other Mg/Al welding method, adopt the inventive method can make the shear strength of combination interface bring up to 74.5MPa, can meet the instructions for use to Mg/Al bimetallic composite component in industrial production.The inventive method technological operation is easy, cost is low, practical, can be used for preparing complex-shaped Mg/Al bimetallic plied timber.The content percentage by weight that the present invention adds Si in solid aluminium alloy workpiece is preferably Si7.5-17% can make the Mg/Al bimetallic plied timber obtaining have higher comprehensive mechanical property.
The method of the liquid-solid compound interface frangible compounds of this inhibition Mg/Al bimetallic that the present invention proposes, the theoretical foundation of its design is to add silicon addition in solid aluminium alloy, forms aluminium silicon binary alloy (hypoeutectic or transcocrystallized Al-Si alloy); In the time of the compound solid aluminium alloy containing Si of liquid Mg, due to interface thermal diffusion (or local micro-molten), the Si in aluminium alloy can diffuse in Mg aluminium alloy, and the si content in the Mg aluminium alloy of interface is increased greatly.Show according to solidifying " impact of Si-Ca alloy on AM60 magnesium alloy in course of solidification and microscopic structure " research in principle and China " Special Processes of Metal Castings and non-ferrous alloy ": while solidifying containing the Mg aluminium alloy of Si, Mg
2si meets and first from Mg aluminium alloy, separates out.And according to Britain's " material journal " (Acta Materialia, 2007,55,3815-3823) " crystal structure of β ' phase in Al-Mg-Si alloy " (The crystal structure of the β ' phase in Al – Mg – Si alloys) research shows Mg
2there is good coherence corresponding relation, Mg in Si phase and solid aluminum
2(001) interface of Si and Al (100) interface formation coherent boundary.Therefore the Mg first separating out when, solidify containing Si liquid magnesium alloy Mg/Al interface
2si meets and depends on the continuous N g of aluminium interface formation strip
2si layer.This strip continuous N g
2si layer forms a barrier, can effectively hinder the diffusion of solid aluminium Al element to Mg aluminium alloy side, thereby reduced in the Mg aluminium alloy of interface containing Al amount, the frangible compounds of separating out in interface after it is solidified greatly reduces, thereby can reduce interfacial brittle.Although it should be noted that strip continuous N g
2si layer has effectively stoped separating out of frangible compounds, but interface strip continuous N g
2si layer also has adverse influence to Interface Microstructure and performance, if by strip continuous N g
2si changes the isolated Mg of a ball mutually into
2si phase, will further improve the microstructure and property at interface.Can make strip continuous N g on the one hand by heat treatment
2si changes Mg tiny, subsphaeroidal and that disperse distributes mutually
2si particle, can realize the solution strengthening of interface aluminium, magnesium matrix on the other hand, thereby improves the bond strength at interface.Finally make the structure property at Mg/Al liquid-solid composite interface be optimized by above-mentioned invention design, thereby improve the shear strength of combination interface.
The present invention is that the solid aluminium alloy workpiece of the cheap elements Si of 7.5-17.0% adopts zincate technique and electroplating technology to carry out surface preparation by having added percentage by weight, then die casting liquid magnesium alloy on solid aluminium alloy workpiece, form the Mg/Al bimetallic plied timber of magnesium metallized aluminum, be placed in chamber type electric resistance furnace in 410-430 DEG C of insulation 2-3h, then take out air cooling to room temperature, technique is simple, be applicable to, for preparing complex-shaped Mg/Al bimetallic plied timber, can be used to produce the parts such as automobile engine cylinder head, crankcase and gear-box.
Brief description of the drawings
Fig. 1 is magnesium/Al bimetal liquid-solid composite experimental provision schematic diagram.
Fig. 2 is the microstructure picture that SIRION200 SEM (SEM) is observed lower AZ31/A380 liquid-solid composite interface.
Fig. 3 is through 420 DEG C, the microstructure picture at insulation 3h Isothermal Hot AZ31/A380 liquid-solid composite after treatment interface.
Fig. 4 is the microstructure picture that SIRION200 SEM (SEM) is observed lower AZ31/AlSi17 liquid-solid composite interface.
Fig. 5 is through 430 DEG C, the microstructure picture at insulation 2h Isothermal Hot AZ31/AlSi17 liquid-solid composite after treatment interface.
Detailed description of the invention
Come by the following examples and by reference to the accompanying drawings implementing process of the present invention and effect to be further elaborated.The term using is apart from outside other explanation, be generally those of ordinary skill in the art the implication that can conventionally understand.
Embodiment 1:
The magnesium alloy of 300mg (AZ31) and the 2g solid aluminium alloy workpiece (hypoeutectic al-si alloy A380, the mass fraction of Si is 7.5%) of 20mmx15mmx4mm are carried out to liquid-solid composite connection, and concrete steps are as follows:
Before carrying out liquid-solid composite, first pretreatment is carried out in the surface of the solid aluminium alloy workpiece that has added the cheap elements Si that percentage by weight is 7.5% in aluminium alloy: first polish smooth with levigator, to 6 grades of surface smoothnesses, then the alcohol that is 60% with concentration of volume percent cleans, then cleans 10s with distilled water; Again solid aluminium alloy workpiece is immersed in to the Ultrasonic Cleaning carrying out in acetone 5 minutes; Again solid aluminium alloy workpiece is immersed to temperature and be in the mixed solution containing 20g/L NaOH and 5g/L sodium fluoride of 60 DEG C and soak 10s, then take out and clean 5s with distilled water; The mixed solution that the hydrofluoric acid that the red fuming nitric acid (RFNA) that again solid aluminium alloy workpiece to be put into by concentration expressed in percentage by weight be 65% and concentration expressed in percentage by weight are 40% is prepared taking volume ratio as 3:1 soaks 10s, after taking-up, cleans 5s with distilled water; Then solid aluminium alloy workpiece is immersed in the mixed solution that contains 320g/L NaOH, 50g/L zinc oxide, 10g/L sodium potassium tartrate tetrahydrate and 1g/L ferric trichloride of 25 DEG C and soaks 30s, then take out and clean 5s with distilled water; Finally the solid aluminium alloy workpiece after cleaning is put into the mixed solution that contains 200g/L potassium chloride, 60g/L zinc chloride and 20g/L boric acid preparing in advance, taking current strength as 0.5A/dm
2, 20 DEG C electroplate 15min.
Fig. 1 is magnesium/Al bimetal liquid-solid composite experimental provision schematic diagram.Experimental provision is as shown in fig. 1: solid aluminium alloy workpiece and magnesium alloy through above-mentioned surface preparation are placed in respectively to the sealable external diameter 55mm in same two ends, internal diameter 50mm, both sides in the quartzy tube chamber (A) of long 570mm, wherein solid aluminium alloy workpiece (B) is placed on one of a side in quartzy tube chamber (A) movably in pallet (C), magnesium alloy (D) is placed in an internal diameter 8mm of the interior opposite side of quartzy tube chamber (A), in the little quartz ampoule (E) of long 290mm, to install sealed at both ends, first adopt mechanical pump to vacuumize 15min to quartzy tube chamber (A), adopt again molecular pump to be evacuated to 5 × 10
-3pa, is filled with inert gas Ar (percentage by volume 99.99%) afterwards again to 0.12Mpa.Be placed in outer resistance furnace (G) the heated quarty tube chamber (A) of quartzy tube chamber (A) after 700 DEG C by computer program control again, mobile pallet (C) by solid aluminium alloy workpiece (B) move to quartzy tube chamber (A) central authorities be positioned at little quartz ampoule (E) loophole under be preheating to after 580 DEG C of design temperatures, (F) liquid magnesium alloy (D) of fusing is squeezed and dropped on solid aluminium alloy workpiece (B) by the graphite " piston " in little quartz ampoule (E) again, realize Mg/Al bimetallic liquid-solid compound, be cooled to below 100 DEG C with the air cooling zone that moves to a side in quartzy tube chamber by this Mg/Al bimetallic plied timber, obtain interface in conjunction with good Mg/Al bimetallic plied timber.
The Mg/Al bimetallic plied timber of above-mentioned formation is heated to 420 DEG C again, and insulation 3h, after being incubated, takes out Mg/Al bimetallic plied timber air cooling to room temperature, obtains the Mg/Al bimetallic plied timber of Interface Microstructure performance optimization.
Fig. 2 is the microphoto that SIRION200 SEM (SEM) is observed lower AZ31/A380 liquid-solid composite interface, has as can be seen from the figure formed a continuous black strip Mg in the interface near solid aluminum one side
2si phase, and formed a small amount of dendritic crystalline frangible compounds in the boundary zone near magnesium alloy one side.
Fig. 3 is through 420 DEG C, the microstructure picture at insulation 3h Isothermal Hot AZ31/A380 liquid-solid composite after treatment interface, as can be seen from the figure, compared with micro-organization chart (Fig. 2) without heat treated AZ31/A380 bimetallic plied timber, the strip Mg that interface is continuous
2si dissolves mutually, and changes tiny, subglobose Mg into
2si phase.The Mg that these disperses distribute
2si has played the effect of interface enhancing mutually, is favourable to the bond strength that improves interface.The shear strength of the Mg/Al bimetallic plied timber finally obtaining is 73MPa.If change the percentage by weight that adds Si in solid aluminium alloy workpiece within the scope of 7.5%-17%, change heat treated heating-up temperature within the scope of 410-430 DEG C, can obtain the effect identical with the above results.
Embodiment 2:
The magnesium alloy of 300mg (AZ31) and the 2g solid aluminium alloy workpiece (transcocrystallized Al-Si alloy AlSi17 is 17% containing Si mass fraction) of 20mmx15mmx4mm are carried out to liquid-solid composite connection, and concrete steps are as follows:
Before carrying out liquid-solid composite, first pretreatment is carried out in the surface of the solid aluminium alloy workpiece that has added the cheap elements Si that percentage by weight is 17% in aluminium alloy: first polish smooth with levigator, to 6 grades of surface smoothnesses, then the alcohol that is 59% with concentration of volume percent cleans, then cleans 10s with distilled water; Again solid aluminium alloy workpiece is immersed in to the Ultrasonic Cleaning carrying out in acetone 5 minutes; Again solid aluminium alloy workpiece is immersed to temperature and be in the mixed solution containing 20g/L NaOH and 5g/L sodium fluoride of 60 DEG C and soak 10s, then take out and clean 5s with distilled water; The mixed solution that the hydrofluoric acid that the red fuming nitric acid (RFNA) that again solid aluminium alloy workpiece to be put into by concentration expressed in percentage by weight be 65% and concentration expressed in percentage by weight are 40% is prepared taking volume ratio as 3:1 soaks 10s, after taking-up, cleans 10s with distilled water; Then solid aluminium alloy workpiece is immersed in the mixed solution that contains 320g/L NaOH, 50g/L zinc oxide, 10g/L sodium potassium tartrate tetrahydrate and 1g/L ferric trichloride of 30 DEG C and soaks 45s, then take out and clean 10s with distilled water; Finally the solid aluminium alloy workpiece after cleaning is put into the mixed solution that contains 200g/L potassium chloride, 60g/L zinc chloride and 20g/L boric acid preparing in advance, taking current strength as 5A/dm
2, 30 DEG C electroplate 10min.
Solid aluminium alloy workpiece and magnesium alloy through above-mentioned surface preparation are placed in respectively to the sealable external diameter 55mm in same two ends, internal diameter 50mm, both sides in the quartzy tube chamber (A) of long 570mm, wherein solid aluminium alloy workpiece (B) is placed on one of a side in quartzy tube chamber (A) movably in pallet (C), magnesium alloy (D) is placed in an internal diameter 8mm of the interior opposite side of quartzy tube chamber (A), in the little quartz ampoule (E) of long 290mm, to install sealed at both ends, first adopt mechanical pump to vacuumize 15min to quartzy tube chamber (A), adopt again molecular pump to be evacuated to 5 × 10
-3pa, is filled with inert gas Ar (percentage by volume 99.99%) afterwards again to 0.12Mpa.Be placed in outer resistance furnace (G) the heated quarty tube chamber (A) of quartzy tube chamber (A) after 700 DEG C by computer program control again, mobile pallet (C) by solid aluminium alloy workpiece (B) move to quartzy tube chamber (A) central authorities be positioned at little quartz ampoule (E) loophole under be preheating to after 550 DEG C of design temperatures, (F) liquid magnesium alloy (D) of fusing is squeezed and dropped on solid aluminium alloy workpiece (B) by the graphite " piston " in little quartz ampoule (E) again, realize Mg/Al bimetallic liquid-solid compound, be cooled to below 100 DEG C with the air cooling zone that moves to a side in quartzy tube chamber by this Mg/Al bimetallic plied timber, obtain interface in conjunction with good Mg/Al bimetallic plied timber.
The Mg/Al bimetallic plied timber of above-mentioned formation is heated to 430 DEG C again, and insulation 2h, after being incubated, takes out Mg/Al bimetallic plied timber air cooling to room temperature, obtains the Mg/Al bimetallic plied timber of Interface Microstructure performance optimization.
Fig. 4 is the microstructure picture that SIRION200 SEM (SEM) is observed lower AZ31/AlSi17 liquid-solid composite interface, has as can be seen from the figure formed a continuous black strip Mg in the interface near solid aluminum one side
2si phase, and formed a small amount of dendritic crystalline frangible compounds in the boundary zone near magnesium alloy one side.
Fig. 5 is through 430 DEG C, the microstructure picture at insulation 2h Isothermal Hot AZ31/AlSi17 liquid-solid composite after treatment interface, as can be seen from the figure, compared with micro-organization chart (Fig. 4) without heat treated AZ31/AlSi17 bimetallic plied timber, continuous Mg in interface
2si changes Mg tiny, subsphaeroidal and that disperse distributes mutually into
2si particle.The Mg that these disperses distribute
2si particle has played the effect of interface enhancing, is favourable to the bond strength that improves interface.The shear strength of the Mg/Al bimetallic plied timber finally obtaining is 74.5MPa.As changed the preheat temperature of solid aluminium alloy workpiece within the scope of 550-580 DEG C, in 2-3h, change heat treated temperature retention time, can obtain the effect identical with above-mentioned experimental result.
Claims (1)
1. suppress a method for the liquid-solid compound interface frangible compounds of Mg/Al bimetallic, it is characterized in that concrete operation step is as follows:
The first step, elder generation add cheap elements Si in aluminium alloy: after commercial aluminum alloy is melted completely, add the industrial crystallization silicon of percentage by weight 7.5-17.0%, after all dissolving, stir so that its homogenising, then drag for the residue on aluminium alloy surface, be poured into immediately and in metal mold or sand mold, carry out gravitational casting and form solid aluminium alloy workpiece;
Second step, adopt zincate technique and electroplating technology to carry out surface preparation the solid aluminium alloy workpiece of above-mentioned formation: first solid aluminium alloy surface to be polished to surface smoothness>=6 grade, then the alcohol that is 55%-60% with concentration of volume percent cleans, then cleans with distilled water; Again solid aluminium alloy workpiece is immersed in and in acetone, carries out Ultrasonic Cleaning; The mixed solution containing 20g/L NaOH and 5g/L sodium fluoride of again solid aluminium alloy workpiece being put into 60-80 DEG C soaks 5-10s, then takes out to immerse in distilled water and cleans; The mixed solution that the hydrofluoric acid that the red fuming nitric acid (RFNA) that again solid aluminium alloy workpiece to be put into by concentration expressed in percentage by weight be 65% and concentration expressed in percentage by weight are 40% is prepared taking volume ratio as 3:1 soaks 5-10s, after taking-up, cleans with distilled water; Then solid aluminium alloy workpiece is immersed in the mixed solution that contains 320g/L NaOH, 50g/L zinc oxide, 10g/L sodium potassium tartrate tetrahydrate and 1g/L ferric trichloride of 25-30 DEG C and soaks 30-45s, then take out and clean with distilled water; Finally the solid aluminium alloy workpiece after cleaning is put into the mixed solution that contains 200g/L potassium chloride, 60g/L zinc chloride and 20g/L boric acid preparing in advance, taking current strength as 0.5-5A/dm
2, 20-30 DEG C electroplate 10-15min;
The 3rd step, solid aluminium alloy workpiece and magnesium alloy through above-mentioned surface preparation are placed in respectively to the sealable external diameter 55mm in same two ends for 3-7:1 in mass ratio, internal diameter 50mm, both sides in the quartzy tube chamber (A) of long 570mm, wherein solid aluminium alloy workpiece (B) is placed on one of a side in quartzy tube chamber (A) movably in pallet (C), magnesium alloy (D) is placed in an internal diameter 6-8mm of the interior opposite side of quartzy tube chamber (A), in the little quartz ampoule (E) of long 290mm, to install sealed at both ends, first adopt mechanical pump to vacuumize and be no less than 15min quartzy tube chamber (A), adopt again molecular pump to be evacuated to and be not less than 5 × 10
-3pa, is filled with inert gas Ar to 0-0.12Mpa afterwards again,
The 4th step, control is placed in outer resistance furnace (G) the heated quarty tube chamber (A) of quartzy tube chamber (A) after 650 DEG C～700 DEG C, mobile pallet (C) by solid aluminium alloy workpiece (B) move to quartzy tube chamber (A) central authorities be positioned at little quartz ampoule (E) loophole under be preheating to after 550 DEG C-580 DEG C of design temperatures, (F) liquid magnesium alloy (D) of fusing is squeezed and dropped on solid aluminium alloy workpiece (B) by the graphite " piston " in little quartz ampoule (E) again, realize Mg/Al bimetallic liquid-solid compound, be cooled to below 100 DEG C with the air cooling zone that moves to a side in quartzy tube chamber by this Mg/Al bimetallic plied timber, obtain interface in conjunction with good Mg/Al bimetallic plied timber,
The 5th step, the Mg/Al bimetallic plied timber of above-mentioned formation is heated to 410 DEG C-430 DEG C again, insulation 2-3h, then takes out Mg/Al bimetallic plied timber air cooling to room temperature, obtains the Mg/Al bimetallic plied timber of Interface Microstructure performance optimization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410312010.9A CN104057067B (en) | 2014-07-01 | 2014-07-01 | A kind of method suppressing magnesium/Al bimetal liquid-solid composite interfacial brittle compound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410312010.9A CN104057067B (en) | 2014-07-01 | 2014-07-01 | A kind of method suppressing magnesium/Al bimetal liquid-solid composite interfacial brittle compound |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104057067A true CN104057067A (en) | 2014-09-24 |
| CN104057067B CN104057067B (en) | 2016-08-17 |
Family
ID=51545162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410312010.9A Expired - Fee Related CN104057067B (en) | 2014-07-01 | 2014-07-01 | A kind of method suppressing magnesium/Al bimetal liquid-solid composite interfacial brittle compound |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104057067B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817607A (en) * | 2016-05-30 | 2016-08-03 | 合肥工业大学 | Method for raising combination intensity of liquid and solid compound interface of aluminum/copper double metal |
| CN106270461A (en) * | 2015-06-04 | 2017-01-04 | 东营市泰达石油装备有限责任公司 | A kind of synthesis technique of wearing composite material |
| CN107186200A (en) * | 2017-06-16 | 2017-09-22 | 重庆理工大学 | Metallurgical binding is molded between reinforcing double-level-metal method and mould |
| CN109396398A (en) * | 2018-10-30 | 2019-03-01 | 华中科技大学 | A kind of method of anti-gravity lost foam casting aluminium/magnesium dual alloy engine cylinder body |
| CN109909613A (en) * | 2019-04-17 | 2019-06-21 | 上海应用技术大学 | Improve the process of heterogeneity aluminum alloy Laser Welding welding joint mechanical property |
| CN110809643A (en) * | 2017-06-27 | 2020-02-18 | 株式会社Posco | Alloy-coated steel sheet and method for producing same |
| CN111957892A (en) * | 2020-08-31 | 2020-11-20 | 华中科技大学 | Heat treatment method of aluminum/magnesium bimetal for lost foam casting and product |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS589970A (en) * | 1981-07-10 | 1983-01-20 | Amagasaki Pipe Seisakusho:Kk | Production of clad plate |
| CN101540221A (en) * | 2009-03-31 | 2009-09-23 | 沈阳工业大学 | Preparation method and mould of liquid-solid composite forming copper cladding aluminum bus duct platoon blank |
| CN201760582U (en) * | 2010-06-29 | 2011-03-16 | 三一重工股份有限公司 | Double-metal liquid/solid composite casting and pouring equipment |
| CN102921927A (en) * | 2012-11-15 | 2013-02-13 | 北京工业大学 | Preparation method of double-liquid bimetal composite wear-resistant lining board |
| JP2013221181A (en) * | 2012-04-17 | 2013-10-28 | Hiroshima Univ | Intermetallic compound-reinforced composite material and method for producing the same |
-
2014
- 2014-07-01 CN CN201410312010.9A patent/CN104057067B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS589970A (en) * | 1981-07-10 | 1983-01-20 | Amagasaki Pipe Seisakusho:Kk | Production of clad plate |
| CN101540221A (en) * | 2009-03-31 | 2009-09-23 | 沈阳工业大学 | Preparation method and mould of liquid-solid composite forming copper cladding aluminum bus duct platoon blank |
| CN201760582U (en) * | 2010-06-29 | 2011-03-16 | 三一重工股份有限公司 | Double-metal liquid/solid composite casting and pouring equipment |
| JP2013221181A (en) * | 2012-04-17 | 2013-10-28 | Hiroshima Univ | Intermetallic compound-reinforced composite material and method for producing the same |
| CN102921927A (en) * | 2012-11-15 | 2013-02-13 | 北京工业大学 | Preparation method of double-liquid bimetal composite wear-resistant lining board |
Non-Patent Citations (2)
| Title |
|---|
| 张浩: "AM60/6061A1液固复合工艺及界面组织性能研究", 《CNKI中国优秀硕士学位论文全文数据库（工程科技Ⅰ辑）》, 15 June 2013 (2013-06-15) * |
| 徐光晨等: "铝合金表面处理对AM60/A390 液固扩散连接界面", 《中国有色金属学报》, vol. 24, no. 4, 13 May 2014 (2014-05-13), pages 855 - 862 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270461A (en) * | 2015-06-04 | 2017-01-04 | 东营市泰达石油装备有限责任公司 | A kind of synthesis technique of wearing composite material |
| CN105817607A (en) * | 2016-05-30 | 2016-08-03 | 合肥工业大学 | Method for raising combination intensity of liquid and solid compound interface of aluminum/copper double metal |
| CN107186200A (en) * | 2017-06-16 | 2017-09-22 | 重庆理工大学 | Metallurgical binding is molded between reinforcing double-level-metal method and mould |
| CN110809643A (en) * | 2017-06-27 | 2020-02-18 | 株式会社Posco | Alloy-coated steel sheet and method for producing same |
| US11608556B2 (en) | 2017-06-27 | 2023-03-21 | Posco Holdings Inc. | Alloy-coated steel sheet and manufacturing method thereof |
| CN109396398A (en) * | 2018-10-30 | 2019-03-01 | 华中科技大学 | A kind of method of anti-gravity lost foam casting aluminium/magnesium dual alloy engine cylinder body |
| CN109909613A (en) * | 2019-04-17 | 2019-06-21 | 上海应用技术大学 | Improve the process of heterogeneity aluminum alloy Laser Welding welding joint mechanical property |
| CN111957892A (en) * | 2020-08-31 | 2020-11-20 | 华中科技大学 | Heat treatment method of aluminum/magnesium bimetal for lost foam casting and product |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104057067B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104057067B (en) | A kind of method suppressing magnesium/Al bimetal liquid-solid composite interfacial brittle compound | |
| CN101503773B (en) | Heat resisting low expansion silumin and preparation thereof | |
| CN104561689B (en) | Heat-resistant cast aluminum alloy and extrusion casting method thereof | |
| CN110052613B (en) | Aluminum/magnesium/aluminum alloy composite plate and preparation method and application thereof | |
| CN101713042B (en) | Quasicrystal reinforced magnesium alloy and semisolid preparation method thereof | |
| CN103846409B (en) | A kind of preparation method of the fibre reinforced composites piston peculiar to vessel with cooling oil chamber | |
| CN1730698A (en) | Aluminium-silicon-copper-magnesium pack alloy and its preparing process | |
| CN104630577A (en) | Heat-resistant cast aluminum alloy and pressure casting method thereof | |
| CN107881378B (en) | Aluminum alloy composition, aluminum alloy element, communication product and preparation method of aluminum alloy element | |
| CN108796317A (en) | Suitable for new-energy automobile can semi-solid squeeze casting aluminium alloy and preparation method | |
| CN103114231A (en) | Mg-Sn-Al wrought magnesium alloy and preparation method thereof | |
| CN106498243A (en) | A kind of pack alloy radiator dedicated aluminium alloy material and preparation method thereof | |
| CN103146962A (en) | High-performance die-casting aluminum alloy for automotive body and preparation method thereof | |
| CN100575513C (en) | A kind of heat resistance magnesium alloy and preparation method thereof | |
| CN104532036A (en) | Special aluminum alloy for extrusion casting prepared from regenerated automobile scrap aluminum parts and preparation method thereof | |
| CN102205409B (en) | Method for manufacturing compound piston blank used for internal combustion engine | |
| CN105331909A (en) | Bubble-free thermal treatment method for semi-solid aluminum-silicon alloy rheological pressure casting | |
| CN106636787A (en) | High-toughness die-casting aluminum alloy and preparation method thereof | |
| CN106566959B (en) | Aluminum alloy material and preparation method thereof | |
| CN103352978B (en) | Al 3ti/Al 3ni particle is collaborative strengthens sial base composite piston and preparation method | |
| CN101173337A (en) | Low cost creep resistanct magnesium alloy and method for producing the same | |
| CN107052306A (en) | A kind of hypereutectic and hypoeutectic al-si alloy solid-liquid bimetal composite casting method | |
| CN105950929B (en) | Hypereutectic Al Si alloys and magnesium alloy hybrid engine cylinder body and its casting method | |
| WO2020171758A1 (en) | A magnesium alloy, a piston manufactured by said magnesium alloy and a method for manufacturing said piston | |
| CN103381471B (en) | The preparation method of nearly cocrystallized Al-Si alloy semi solid slurry or blank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20200701 |