CN109972009A

CN109972009A - A kind of high tough high-modulus wrought magnesium alloy and preparation method thereof

Info

Publication number: CN109972009A
Application number: CN201910308396.9A
Authority: CN
Inventors: 王渠东; 魏杰
Original assignee: FENGYANG L-S LIGHT ALLOY NET FORMING Co Ltd; SHANGHAI LIGHT ALLOY NET FORMING NATIONAL ENGINEERING RESEARCH CENTER Co Ltd; Shanghai Jiaotong University
Current assignee: FENGYANG L-S LIGHT ALLOY NET FORMING Co Ltd; SHANGHAI LIGHT ALLOY NET FORMING NATIONAL ENGINEERING RESEARCH CENTER Co Ltd; Shanghai Jiaotong University
Priority date: 2019-04-17
Filing date: 2019-04-17
Publication date: 2019-07-05
Anticipated expiration: 2039-04-17
Also published as: CN109972009B

Abstract

The invention discloses a kind of high tough high-modulus wrought magnesium alloys and preparation method thereof, it is made of following element by mass percentage: the Al of a%, the mixing of one or more of La, Ce, Pr of b%, the Mn of c%, one or more of total RE rare earth Gd containing d%, Y, Sm, Nd, Er, Eu, Ho, Tm, Lu, Dy, Yb element, one or more of total Si, Ge, Ca, Li, Sn, Zn, Sb containing e% element, impurity of the total amount less than 0.2%, surplus Mg；A, b, c, d and e meet 3.5≤a≤6.0,0.5≤b≤4.5,0.01≤c≤1.0,0.01≤d≤2.5 and 0 < e≤4.0.Raw material is preheated, melt, cast to obtain magnesium alloy ingot, hot extrusion or hot forging or hot rolling obtains magnesium alloy deformation part, and method is simple, technology stability is good and degree of controllability is high.

Description

A kind of high tough high-modulus wrought magnesium alloy and preparation method thereof

Technical field

The invention belongs to nonferrous materials and its manufacture fields, and in particular to a kind of high tough high-modulus wrought magnesium alloy And preparation method thereof.

Background technique

Magnesium and its alloy be industrial applicable most light-weight metal structural material at present, with small (the about aluminium of density 2/3, the 1/4 of steel), specific strength and the advantages that specific stiffness height, damping and amortization, machinability, good casting property, is widely used to The fields such as automobile, communication electronics, aerospace, military affairs.In recent years, with aerospace and the rapid hair of transport facility Exhibition, operates that required aerodynamic power is increasing, therefore obdurability to material members and elastoresistance adaptability to changes propose more High requirement.But the lower absolute intensity of magnesium alloy, plasticity and elasticity modulus constrain its further pushing away in these fields Extensively with application so that the demand of high tough high-modulus magnesium alloy is higher and higher.

AE44 (Mg-4Al-4RE, wt.%) magnesium alloy is that both had excellent room temperature mechanical property so far in commercial magnesium alloy Can, and have both a kind of alloy of good high-temperature creep resistance.Its excellent mechanical property has benefited from Al element and RE element is raw At Al₁₁RE₃Hardening constituent, but due to most of Al₁₁RE₃Hardening constituent be it is needle-shaped, can the second phase tip generate stress concentrate, dislike Change material property.In response to this problem, Chinese patent CN108588524A is gone bad needle-shaped by elements such as alloying Gd, Y, Sm Al₁₁RE₃It is mutually corynebacterium or graininess, and introduces Al₂RE hardening constituent significantly improves the obdurability of alloy.For promotion magnesium Alloy modulus, according to mixing rule it is found that introducing high-modulus reinforcement can be improved matrix modulus.Chinese patent CN105624502A and CN104087800A is disclosed respectively by addition aluminium oxide and SiC particulate, to obtain high-modulus magnesium-based The preparation method of composite material.But it is easy the presence of the bad problem that matches with basal body interface by additional high-modulus reinforcement, and often Rule casting is difficult to ensure that reinforcement is uniformly distributed in the base.And it can by addition alloying element in-situ preparation high-modulus reinforced phase Preferably to solve the above problems, Chinese patent CN104928549A and CN104928550A are just used and are added in the magnesium alloy The elements such as Al, Li, Si form Al₃Li、Mg₂The high-modulus such as Si reinforced phase is to improve magnesium alloy modulus.

Though the prior art can effectively improve magnesium alloy modulus by introducing high-modulus reinforced phase, pass through alloying original position The high-modulus reinforced phase such as Al of generation₃Li、Mg₂Si、Al₂Ca etc. belongs to brittlement phase, and crack initiation can be become by being distributed in crystal boundary Point reduces magnesium alloy obdurability, especially plasticity.

Summary of the invention

In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of high tough high-modulus wrought magnesium alloy and its Preparation method controls reinforced phase and form and ratio is precipitated by Reasonable Regulation And Control component ratio, and passes through hot extrusion, hot forging, hot rolling Etc. processing technologys further refine crystal grain, the second phase, and the distribution of the second phase is homogenized, so that the alloy is at room temperature simultaneously Have a high-strength tenacity and high elastic modulus, alloy provided by the invention can satisfy high tough high-modulus light material and (or) The demand of components manufacture.

The purpose of the present invention can be achieved through the following technical solutions:

A kind of deformed magnesium alloy material is made of following element by mass percentage: La, Ce of the Al of a%, b%, The mixing of one or more of Pr, the Mn of c%, add up to the RE rare earth Gd containing d%, Y, Sm, Nd, Er, Eu, Ho, Tm, One or more of Lu, Dy, Yb element add up to one or more of Si, Ge, Ca, Li, Sn, Zn, Sb containing e% member Element, impurity of the total amount less than 0.2%, surplus Mg, a, b, c, d and e meet following formulas (1)~(5),

(1)3.5≤a≤6.0；

(2)0.5≤b≤4.5；

(3)0.01≤c≤1.0；

(4)0.01≤d≤2.5；

(5)0<e≤4.0。

Preferably, in the formula (4) d value range are as follows: 0.1≤d≤2.0.The rare earth elements such as Gd, Y, Sm consolidating in Mg Solubility is larger, the additive amount of d >=0.1 ageing strengthening, rotten Al in formula (4)₁₁RE₃Second phase effect more preferably, but additive amount > 2.0 Excessive second phase can be generated, deformation of the alloy in secondary operation can be hindered, be easy to produce crackle.

Preferably, in the formula (5) e value range are as follows: 0.2≤e≤4.0.The elements such as Si, Ge, Ca, Li, Sn are in Mg Solid solubility is smaller, in magnesium-rare earth containing Al, mainly forms reinforced phase reinforced alloys performance with other alloying elements.Formula (5) The effect that alloy modulus is improved in the additive amount of middle e >=0.2 is more significant, but additive amount > 4.0 reinforced phases can excessively be roughened, so that Alloy obdurability drastically reduces, and increases the difficulty of alloy secondary operation.

The independent role of alloying element

Wherein, 1) Al is used for balanced alloy strength, plasticity, improves Production Practice of Casting Technologies, makes the suitable big batch of the present invention Production.2) for La, Ce, Pr element for improving alloy mechanical property, La, Ce, Pr element and aluminium are preferentially produced Al₁₁RE₃Phase inhibits Generate the Mg of thermostability difference₁₇Al₁₂Phase improves the room temperature and mechanical behavior under high temperature of alloy；In addition, La, Ce, Pr can remove it is molten Impurity when refining in magnesium alloy fused mass achievees the effect that refinery by de-gassing, purification melt.3) Mn is used to improve the corrosion resistance of alloy Can, Mn can form compound with iron in magnesium alloy or other heavy metal elements, remove it mostly as slag；Mn can also promote Into the ageing strengthening effect of alloy, Al-Mn nanometers of timeliness phases are formed, alloy obdurability and modulus are further increased；In addition, 720 At DEG C, solid solubility of the Mn in Mg is~1.1at.%, and in process of setting, part Mn element has little time to be precipitated that form supersaturation solid Solution reduces matrix lattice constant, improves alloy elastic modulus.4) rare earth elements such as Gd, Y, Sm solid solubility in Mg is larger, Mainly exist in the form of three kinds in magnesium alloy containing Al: solid solution is in the base；Segregation is in crystal boundary, phase boundary and dendrite circle；Being solid-solubilized in Close in object or formed compound.Above-mentioned rare earth element is added into alloy, can be played the role of solution strengthening, be improved intensity.Into One step increases the content of above-mentioned rare earth, can be preferentially produced fine particle shape high-melting-point Al with Al element₂RE intermetallic compound, energy Refine crystal grain as heterogeneous forming core core, and Dispersed precipitate is in matrix, change during alloy fracture crack initiation position and Extension approach further increases the plasticity of alloy.In addition, the addition of the rare earth elements such as Gd, Y, Sm can also promote magnesium containing Al to close The ageing strengthening effect of gold increases hardening constituent, further increases the intensity and modulus of alloy.5) elements such as Si, Ge, Ca, Li, Sn Solid solubility is lower in Mg, mainly generates reinforced phase with Mg or Al in magnesium alloy containing Al.As shown in table 1, the above element and Mg Or the reinforced phase elasticity modulus range that Al is preferentially produced is 80~120GPa.According to mixing rule it is found that being distributed in alloy substrate Reinforced phase modulus it is higher, volume ratio is bigger, and the modulus of alloy is higher.And the test modulus value of Mg is 39~46GPa, therefore table Reinforced phase shown in 1 can effectively improve the elasticity modulus of magnesium alloy.

Table 1: the elasticity modulus of reinforced phase

The synergistic effect of alloying element

High tough high-modulus magnesium alloy, can further regulate and control the addition element type and content of different component in the present invention, Crystal grain, rotten second phase can be further refined, alloy obdurability and elasticity modulus are improved.1) rare earth elements such as Gd, Y, Sm exist Solute distribution coefficient k < 1 in Mg, and Rare-Earth Element Chemistry activity is extremely strong segregation and can be adsorbed on the crystal grain boundary or branch grown up On crystal boundary face, crystal grain and dendrite are hindered, can significantly refine crystal grain, granulating Al₁₁RE₃Needlelike phase greatly improves alloy properties Energy, especially plasticity.2) rare earth elements such as Gd, Y, Sm can go bad Chinese character shape Mg₂Si and Al in net distribution₂Ca is particle Shape reduces isolate effect of the high-modulus reinforced phase to matrix, while capable of improving alloy modulus, does not drop low-alloyed obdurability.

Preferably, in the magnesium alloy materials, comprising:

The Mg that (I) is gone bad by RE element₂Si、Al₂Ca、Mg₂Ge、Al₃Li and Mg₂Sn high-modulus hardening constituent, and

(II) corynebacterium Al₁₁RE₃, graininess Al₂RE hardening constituent, and/or

(III) Al-Mn nanometers of ageing strengthening phases.

Preferably, in the magnesium alloy materials, 3.6%≤b+d≤7.0%.It is further preferred that the magnesium alloy materials In, 4.5%≤b+d≤6.0%.

The preparation method of above-mentioned deformed magnesium alloy material, includes the following steps,

S1: molten alloy, by pure Mg, pure Al, magnesium rare earth intermediate alloy, aluminium manganese or magnesium manganese intermediate alloy and remaining group Divide and preheats respectively；

Preferably, in the step S1, preheating temperature is 200~250 DEG C, and preheating time is 2~6 hours.The preheating Temperature and time can effectively remove the moisture of raw material, and be avoided that raw material surface excessive oxidation in warm is asked Topic.

Preferably, in the step S1, magnesium rare earth intermediate alloy is magnesium cerium-rich mischmetal intermediate alloy, the centre conjunction of magnesium lanthanum Gold, magnesium cerium intermediate alloy, magnesium praseodymium intermediate alloy, magnesium samarium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium richness yttrium are mixed Close rare earth intermediate alloy, magnesium neodymium intermediate alloy, magnesium praseodymium neodymium mixed rare-earth intermediate alloy, magnesium erbium intermediate alloy, magnesium europium intermediate alloy, One of magnesium holmium intermediate alloy, magnesium thulium intermediate alloy, magnesium lutetium intermediate alloy, magnesium dysprosium intermediate alloy, magnesium ytterbium intermediate alloy are several The combination of kind intermediate alloy.

Contain tri- kinds of rare earth elements of La, Ce, Pr in the cerium-rich mischmetal.

Preferably, in the step S1, remaining group is divided into Mg-based master alloy or contained aluminium-base intermediate alloy or pure metal.It is described Mg-based master alloy is magnesium silicon intermediate alloy, magnesium calcium intermediate alloy, magnesium lithium intermediate alloy, magnesium zinc intermediate alloy, the centre conjunction of magnesium antimony The combination of one or more of gold intermediate alloy；The contained aluminium-base intermediate alloy is aluminium silicon intermediate alloy, aluminium germanium intermediate alloy, aluminium The group of one or more of calcium intermediate alloy, aluminium lithium intermediate alloy, aluminium tin intermediate alloy, aluminium antimony intermediate alloy intermediate alloy It closes；The pure metal is one or both of pure silicon, pure zinc.

S2: the pure Mg after preheating is completely melt in protective atmosphere；It is pure after preheating is added at 670~690 DEG C Al；When temperature is raised to 720~740 DEG C, the intermediate alloy or pure metal after preheating is added；It is completely molten to intermediate alloy or pure metal It is warming up to 720~740 DEG C after change, refining agent is added and is refined, is stood after refining at 710-730 DEG C, it is cooled to 680~ Melt is cast to and is preheating to 200~300 DEG C of metal type dies or sand mold mould, obtains magnesium alloy by skimming operation after 700 DEG C Ingot casting；

Preferably, in step S2, refining agent is added and is refined, at 720 DEG C after refining, is stood.Refining temperature choosing Select 720 DEG C, refining effect is best, can degasification to the full extent slagging-off, purify melt.

The protective atmosphere of the step S2 is SF₆And CO₂Mixed gas.Preferably, the SF₆And CO₂Volume ratio be 1:99.

The refining agent of the step S2 is the refining agent of Mg alloy containing inorganic salts, it is preferred that sodium salt, sylvite, villiaumite Inorganic salts refining agent of Mg alloy or carbon trichloride.

Preferably, the additional amount of refining agent is the 1-5% of all total mass of raw materiales.

S3: hot extrusion or warm and hot forging or hot rolling are carried out to the magnesium alloy ingot in step S2, obtain magnesium alloy deformation Part.

Preferably, extrusion process in the step S3 are as follows: remove the surface scale of the obtained magnesium alloy ingot of step S2 It removes, then it after Homogenization Treatments 1.0~10.0 hours, is applied on the magnesium alloy ingot surface at 200~500 DEG C and be covered with magnesium Alloy lubricating agent, the extrusion die after preheating 1~2 hour at 150~400 DEG C obtain high tough high-modulus through plastic deformation and deform Magnesium alloy.The extrusion process can be single extrusion or repeatedly to repeatedly extrude, and extrusion ratio is (4~100): 1, extruding rate is 0.01~0.2m/min, after extrusion demoulding, the type of cooling is air-cooled or water cooling.

Preferably, forging technology in the step S3 are as follows: remove the surface scale of the obtained magnesium alloy ingot of step S2 It removes, then by it at 200~500 DEG C after Homogenization Treatments 1.0~10.0 hours, in the magnesium alloy ingot surface and forge mould Tool applies and is covered with magnesium alloy lubricant, and the forging mold after preheating 1~2 hour at 250~400 DEG C obtains high tough through plastic deformation High-modulus wrought magnesium alloy.The forging technology can for single forging and stamping or multiple forging and forming, forging reduction in pass be 10~ 60%, forging rate is 3~90mm/min, and after forging demoulding, the type of cooling is air-cooled or water cooling.

Preferably, rolling mill practice in the step S3 are as follows: remove the surface scale of the obtained magnesium alloy ingot of step S2 It removes, then after Homogenization Treatments 1.0~10.0 hours, applies it on the magnesium alloy ingot surface and roll at 200~500 DEG C It is covered with magnesium alloy lubricant, roll preheating temperature is 80~200 DEG C.The rolling mill practice can roll for single track rolling or multiple tracks, Rolling pass drafts is 5~60%, and rolling rate is 1~5m/min, and after rolled parts demoulding, the type of cooling is air-cooled or water It is cold.

Preferably, the magnesium alloy lubricant is aquadag.

Preferably, the forging mold divides upper and lower mould, and modeling up and down can be determined according to production requirement.The multiple forging and stamping Molding should be less than 3 times, can obtain more excellent mechanical property.

It is provided by the invention squeeze, forging, rolling mill practice can produce flawless, fine microstructures, good mechanical performance Wrought magnesium alloy components.

The tough high-modulus deformed magnesium alloy material of height produced by the invention can be used directly, or material is heat-treated Strengthen.

Preferably, the temperature of the solution treatment is 300~500 DEG C, and the time of the solution treatment is 0.1~4 hour； The temperature of the artificial aging processing is 175~225 DEG C, and the time of the ageing treatment is 1~32 hour.The solution treatment Technique is guaranteeing that crystal grain is not grown up excessively and solid solution effect is best, and the aging treatment process can make material obtain significant timeliness Strengthening effect.

Or the deformable member prepared in step S3 is subjected to direct labor's ageing treatment, the temperature of the ageing treatment is 175~225 DEG C, the time of the ageing treatment is 1~32 hour.

Preferably, the Cooling Method After Heat-treatment is air-cooled or water cooling.

Compared with prior art, the beneficial effects of the present invention are:

1, magnesium alloy materials prepared by the present invention compared with prior art, can guarantee preferably again while improving elasticity modulus Obdurability.The present invention is using alloyage process in-situ authigenic at Mg₂Si、Al₂Ca or Al₃Li et al. high-modulus hardening constituent, significantly mentions High alloy elastic modulus.

2, the RE such as Gd, Y, Nd element is in addition to that can refine matrix, and go bad Al₁₁RE₃Needlelike phase introduces Al₂RE hardening constituent, mentions The obdurability of high alloy, the Chinese character shape that can also go bad Mg₂Si, netted Al₂Ca reinforced phase, improve alloy elastic modulus while again Preferable obdurability can be had both.

3, magnesium alloy deformation technique provided by the invention can further refine crystal grain, the second phase, and homogenize the second phase Distribution, thus produce flawless, fine microstructures, good mechanical performance components, greatly improve magnesium alloy obdurability and Elasticity modulus.

4, this preparation method is simple, technology stability is good, technique degree of controllability is high.

Specific embodiment

Below with reference to embodiment, the invention will be further described:

Various intermediate alloys used in the present invention are commercial product, and the magnesium rare earth intermediate alloy is purchased from Ganzhou and soars Light-alloy Co., Ltd.

Embodiment 1:

The alloying component (mass percent) of wrought magnesium alloy: 3.84%Al, 0.94%Ce, 1.12%La, 0.42%Sm, 0.25%Si, 0.50%Zn, 0.33%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.

The present embodiment is related to the alloy deformation method in the method for smelting and the present invention of conventional rare magnesium alloy:

Wherein, melting process is in SF₆And CO₂It is carried out under the conditions of mixed gas protected, steps are as follows:

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, magnesium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 670 DEG C, after preheating is added； When temperature is raised to 720 DEG C, the magnesium cerium intermediate alloy, magnesium lanthanum intermediate alloy, magnesium samarium intermediate alloy, magnesium silicon centre after preheating is added are closed Gold.Refining agent is added after intermediate alloy is completely melt, when melt temperature gos up to 720 DEG C to be refined, at 720 DEG C after refining It is stood, skimming operation after being cooled to 680 DEG C, casts into the metal die for being preheating to 200 DEG C, obtain magnesium alloy ingot；

Deform process are as follows:

The surface scale of the magnesium alloy ingot is removed, then by it at 400 DEG C after Homogenization Treatments 6 hours, The magnesium alloy ingot surface applies and is covered with aquadag, and the extrusion die after preheating 1.5 hours at 250 DEG C obtains height through plastic deformation Tough high-modulus wrought magnesium alloy.The extrusion process can be single extrusion, extrusion ratio 36:1, extruding rate 0.1m/ Min, after extrusion demoulding, the type of cooling is water cooling.

The room-temperature mechanical property test result of 1 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 2:

The alloying component (mass percent) of high tough high-modulus wrought magnesium alloy: 3.79%Al, 1.14%Ce, 1.28% La, 0.42%Sm, 0.25%Si, 0.50%Zn, 0.30%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.

Melting raw material is preheated 2 hours at 250 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, magnesium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 680 DEG C, after preheating is added； When temperature is raised to 730 DEG C, the magnesium cerium intermediate alloy, magnesium lanthanum intermediate alloy, magnesium samarium intermediate alloy, aluminium silicon centre after preheating is added are closed Gold；Refining agent is added after intermediate alloy is completely melt, when melt temperature gos up to 730 DEG C to be refined, at 720 DEG C after refining It is stood, skimming operation after being cooled to 690 DEG C, casts into the metal die for being preheating to 250 DEG C, obtain magnesium alloy ingot；

After magnesium alloy ingot implementation and the identical deformation process of embodiment 1, magnesium alloy deformation part is obtained.

The room-temperature mechanical property test result of 2 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 3:

The alloying component (mass percent) of high tough high-modulus wrought magnesium alloy: 3.71%Al, 1.57%Ce, 1.71% La, 0.42%Sm, 0.25%Si, 0.50%Zn, 0.24%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.

Melting raw material is preheated 2 hours at 250 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, magnesium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 680 DEG C, after preheating is added； When temperature is raised to 730 DEG C, the magnesium cerium intermediate alloy, magnesium lanthanum intermediate alloy, magnesium samarium intermediate alloy, aluminium silicon centre after preheating is added are closed Gold；Refining agent is added after intermediate alloy is completely melt, when melt temperature gos up to 730 DEG C to be refined, at 720 DEG C after refining It is stood, skimming operation after being cooled to 690 DEG C, casts into the metal die for being preheating to 300 DEG C, obtain magnesium alloy ingot；

The room-temperature mechanical property test result of 3 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 4:

The alloying component (mass percent) of high tough high-modulus wrought magnesium alloy: 3.90%Al, 1.14%Ce, 1.28% La, 0.20%Gd, 0.25%Si, 0.50%Zn, 0.30%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.

Melting raw material is preheated 6 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, magnesium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 690 DEG C, after preheating is added； When temperature is raised to 740 DEG C, the magnesium mixed rare earth of lanthanum and cerium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium silicon intermediate alloy after preheating is added； Refining agent is added after intermediate alloy fusing, when melt temperature gos up to 740 DEG C to be refined, it is quiet in 720 DEG C of progress after refining It sets, skimming operation after being cooled to 700 DEG C, casts into the metal die for being preheating to 250 DEG C, obtain magnesium alloy ingot；

The room-temperature mechanical property test result of 4 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 5:

The alloying component (mass percent) of high tough high-modulus wrought magnesium alloy: 3.88%Al, 1.12%Ce, 1.26% La, 0.45%Gd, 0.25%Si, 0.50%Zn, 0.27%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, aluminium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 670 DEG C, after preheating is added； When temperature is raised to 720 DEG C, the magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium silicon centre after preheating is added are closed Gold；Refining agent is added after intermediate alloy fusing, when melt temperature gos up to 720 DEG C to be refined, is carried out after refining at 720 DEG C It stands, skimming operation after being cooled to 680 DEG C, casts into the metal die for being preheating to 250 DEG C, obtain magnesium alloy ingot.

The room-temperature mechanical property test result of 5 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 6:

The alloying component (mass percent) of high tough high-modulus wrought magnesium alloy: 3.75%Al, 1.12%Ce, 1.17% La, 1.00%Gd, 0.25%Si, 0.50%Zn, 0.27%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, aluminium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 690 DEG C, after preheating is added； When temperature is raised to 740 DEG C, the magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium silicon centre after preheating is added are closed Gold；Refining agent is added after intermediate alloy fusing, when melt temperature gos up to 740 DEG C to be refined, is carried out after refining at 720 DEG C It stands, skimming operation after being cooled to 680 DEG C, casts into the metal die for being preheating to 250 DEG C, obtain magnesium alloy ingot.

The room-temperature mechanical property test result of 6 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 7:

The alloying component (mass percent) of high tough high-modulus wrought magnesium alloy: 3.88%Al, 1.15%Ce, 1.32% La, 0.33%Y, 0.03%Tb, 0.04%Er, 0.25%Si, 0.50%Zn, 0.31%Mn, other inevitable impurity are small In 0.2%, remaining is Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, aluminium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 680 DEG C, after preheating is added； When temperature is raised to 730 DEG C, preheated magnesium lanthanum intermediate alloy is added, magnesium cerium intermediate alloy, magnesium yttrium intermediate alloy, closes among magnesium terbium Gold, magnesium erbium intermediate alloy, magnesium silicon intermediate alloy；After intermediate alloy is completely melt, essence is added when melt temperature gos up to 730 DEG C Refining agent is refined, and is stood after refining at 720 DEG C, skimming operation after being cooled to 700 DEG C, and casting is to being preheating to 200 DEG C In sand mold mould, magnesium alloy ingot is obtained.

The room-temperature mechanical property test result of 7 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 8:

The alloying component (mass percent) of high tough high-modulus wrought magnesium alloy: 3.79%Al, 1.11%Ce, 1.27% La, 0.50%Y, 0.25%Si, 0.50%Zn, 0.28%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, aluminium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 670 DEG C, after preheating is added； When temperature is raised to 720 DEG C, the magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium yttrium intermediate alloy, magnesium silicon centre after preheating is added are closed Gold；Refining agent is added after intermediate alloy fusing, when melt temperature gos up to 720 DEG C to be refined, is carried out after refining at 720 DEG C It stands, skimming operation after being cooled to 680 DEG C, casts into the sand mold mould for being preheating to 250 DEG C, obtain magnesium alloy ingot.

The room-temperature mechanical property test result of 8 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 9:

The alloying component (mass percent) of high tough high-modulus wrought magnesium alloy: 6.00%Al, 1.57%Ce, 1.71% La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 0.70%Li, 0.34%Mn, other inevitable impurity are small In 0.2%, remaining is Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, aluminium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 690 DEG C, after preheating is added； When temperature is raised to 740 DEG C, the magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium yttrium intermediate alloy, aluminium silicon centre after preheating is added are closed Gold；Refining agent is added after intermediate alloy fusing, when melt temperature gos up to 740 DEG C to be refined, is carried out after refining at 720 DEG C It stands, skimming operation after being cooled to 690 DEG C, in the sand mold mould of casting to 300 DEG C of preheating, obtains magnesium alloy ingot.

The room-temperature mechanical property test result of 9 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 10:

The alloying component (mass percent) of high tough high-modulus wrought magnesium alloy: 4.00%Al, 1.14%Ce, 1.28% La, 0.09%Sm, 0.05%Nd, 0.21%Gd, 0.15%Y, 0.25%Si, 0.5%Zn, 0.34%Mn, it is other inevitable Impurity less than 0.2%, remaining is Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, aluminium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 680 DEG C, after preheating is added； When temperature is raised to 730 DEG C, the magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium samarium intermediate alloy, magnesium neodymium centre after preheating is added are closed Gold, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, aluminium silicon intermediate alloy；After intermediate alloy fusing, melt temperature gos up to 730 DEG C when be added refining agent refined, stood after refining at 720 DEG C, skimming operation after being cooled to 690 DEG C, casting to preheat In 225 DEG C of metal die, magnesium alloy ingot is obtained.

The room-temperature mechanical property test result of 10 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 11:

The alloying component (mass percent) of wrought magnesium alloy: 3.84%Al, 1.14%Ce, 1.24%La, 0.13%Sm, 0.08%Nd, 0.32%Gd, 0.22%Y, 0.25%Si, 0.5%Zn, 0.30%Mn, other inevitable impurity are less than 0.2%, remaining is Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, magnesium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 690 DEG C, after preheating is added； When temperature is raised to 740 DEG C, the magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium samarium intermediate alloy, magnesium neodymium centre after preheating is added are closed Gold, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium silicon intermediate alloy；After intermediate alloy fusing, melt temperature gos up to 740 DEG C when be added refining agent refined, stood after refining at 720 DEG C, skimming operation after being cooled to 700 DEG C, casting to preheat In 225 DEG C of metal die, magnesium alloy ingot is obtained.

The room-temperature mechanical property test result of 11 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 12:

The alloying component (mass percent) of high tough high-modulus wrought magnesium alloy: 3.81%Al, 1.10%Ce, 1.22% La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 0.25%Si, 0.5%Zn, 0.27%Mn, it is other inevitable Impurity less than 0.2%, remaining is Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, aluminium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 680 DEG C, after preheating is added； When temperature is raised to 730 DEG C, the magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium samarium intermediate alloy, magnesium neodymium centre after preheating is added are closed Gold, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium silicon intermediate alloy；After intermediate alloy fusing, melt temperature gos up to 730 DEG C when be added refining agent refined, stood after refining at 720 DEG C, skimming operation after being cooled to 690 DEG C, casting to preheat In 225 DEG C of metal die, magnesium alloy ingot is obtained.

The room-temperature mechanical property test result of 12 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 13:

The alloying component (mass percent) of high tough high-modulus wrought magnesium alloy: 3.50%Al, 0.50%Ce, 1.06% Sm, 1.36%Gd, 0.03%Eu, 0.01%Dy, 0.02%Ho, 0.01%Tm, 0.01%Lu, 0.25%Si, 0.5%Zn, 0.01%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, aluminium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 670 DEG C, after preheating is added； When temperature is raised to 720 DEG C, the magnesium cerium intermediate alloy, magnesium samarium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium europium centre after preheating is added are closed Gold, magnesium dysprosium intermediate alloy, magnesium holmium intermediate alloy, magnesium thulium intermediate alloy, magnesium lutetium intermediate alloy, aluminium silicon intermediate alloy；It is closed to centre Refining agent is added after gold fusing, when melt temperature gos up to 720 DEG C to be refined, is stood, is cooled at 720 DEG C after refining Skimming operation after 680 DEG C, casting obtain magnesium alloy ingot into the metal die for preheating 225 DEG C.

The room-temperature mechanical property test result of 13 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 14:

The alloying component (mass percent) of high tough high-modulus wrought magnesium alloy: 6.00%Al, 2.20%Ce, 1.13% La, 1.17%Pr, 0.16%Sm, 0.01%Yb, 0.25%Si, 0.50%Zn, 1.00%Mn, other inevitable impurity are small In 0.2%, remaining is Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, aluminium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 670 DEG C, after preheating is added； When temperature is raised to 720 DEG C, the magnesium cerium-rich rare earth intermediate alloy, magnesium ytterbium intermediate alloy, aluminium silicon intermediate alloy after preheating is added；To in Between after alloy melting, melt temperature is added refining agent when ging up to 720 DEG C and is refined, and is stood after refining at 720 DEG C, cold But to skimming operation after 680 DEG C, casting obtains magnesium alloy ingot into the metal die for preheating 225 DEG C.

The room-temperature mechanical property test result of 14 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 15:

The alloying component (mass percent) of wrought magnesium alloy: 3.84%Al, 1.14%Ce, 1.24%La, 0.13%Sm, 0.08%Nd, 0.32%Gd, 0.22%Y, 1.00%Si, 1.5%Zn, 0.30%Mn, other inevitable impurity are less than 0.2%, remaining is Mg.

The room-temperature mechanical property test result of 15 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 16:

The alloying component (mass percent) of wrought magnesium alloy: 3.79%Al, 1.13%Ce, 1.22%La, 0.12%Sm, 0.08%Nd, 0.32%Gd, 0.21%Y, 2.00%Si, 2.00%Zn, 0.28%Mn, other inevitable impurity are less than 0.2%, remaining is Mg.

The room-temperature mechanical property test result of 16 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 17:

The alloying component (mass percent) of wrought magnesium alloy: 3.84%Al, 1.14%Ce, 1.24%La, 0.13%Sm, 0.08%Nd, 0.32%Gd, 0.22%Y, 1.00%Ge, 1.5%Zn, 0.30%Mn, other inevitable impurity are less than 0.2%, remaining is Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, magnesium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 690 DEG C, after preheating is added； When temperature is raised to 740 DEG C, the magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium samarium intermediate alloy, magnesium neodymium centre after preheating is added are closed Gold, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, aluminium germanium intermediate alloy；After intermediate alloy fusing, melt temperature gos up to 740 DEG C when be added refining agent refined, stood after refining at 720 DEG C, skimming operation after being cooled to 700 DEG C, casting to preheat In 225 DEG C of metal die, magnesium alloy ingot is obtained.

The room-temperature mechanical property test result of 17 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 18:

The alloying component (mass percent) of wrought magnesium alloy: 3.84%Al, 1.14%Ce, 1.24%La, 0.13%Sm, 0.08%Nd, 0.32%Gd, 0.22%Y, 0.25%Si, 0.40%Li, 0.5%Zn, 0.30%Mn are other inevitably miscellaneous For matter less than 0.2%, remaining is Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, magnesium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 690 DEG C, after preheating is added； When temperature is raised to 740 DEG C, the magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium samarium intermediate alloy, magnesium neodymium centre after preheating is added are closed Gold, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium silicon intermediate alloy, magnesium lithium intermediate alloy；After intermediate alloy fusing, melt Refining agent is added when temperature recovery is to 740 DEG C to be refined, is stood, is skimmed after being cooled to 700 DEG C floating at 720 DEG C after refining Slag, casting obtain magnesium alloy ingot into the metal die for preheating 225 DEG C.

The room-temperature mechanical property test result of 18 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 19:

The alloying component (mass percent) of wrought magnesium alloy: 3.84%Al, 1.14%Ce, 1.24%La, 0.13%Sm, 0.08%Nd, 0.32%Gd, 0.22%Y, 0.50%Ca, 0.2%Sb, 0.30%Mn, other inevitable impurity are less than 0.2%, remaining is Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, pure zinc, magnesium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 690 DEG C, after preheating is added； When temperature is raised to 740 DEG C, the magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium samarium intermediate alloy, magnesium neodymium centre after preheating is added are closed Gold, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium calcium intermediate alloy, magnesium antimony intermediate alloy；After intermediate alloy fusing, melt Refining agent is added when temperature recovery is to 740 DEG C to be refined, is stood, is skimmed after being cooled to 700 DEG C floating at 720 DEG C after refining Slag, casting obtain magnesium alloy ingot into the metal die for preheating 225 DEG C.

The room-temperature mechanical property test result of 19 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Embodiment 20:

The alloying component (mass percent) of wrought magnesium alloy: 3.84%Al, 1.14%Ce, 1.24%La, 0.13%Sm, 0.08%Nd, 0.32%Gd, 0.22%Y, 1.00%Sn, 0.30%Mn, other inevitable impurity less than 0.2%, remaining For Mg.

Melting raw material is preheated 3 hours at 200 DEG C；Pure magnesium after drying SF has been put into₆/CO₂The crucible electricity of gas shield It is melted in resistance furnace；Fine aluminium, magnesium manganese intermediate alloy when pure magnesium is completely melt, after temperature reaches 690 DEG C, after preheating is added；Work as temperature Degree is raised to 740 DEG C, magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy after preheating is added, Magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, aluminium tin intermediate alloy；After intermediate alloy fusing, when melt temperature gos up to 740 DEG C Refining agent is added to be refined, is stood after refining at 720 DEG C, skimming operation after being cooled to 700 DEG C, casting to preheating 225 DEG C metal die in, obtain magnesium alloy ingot.

The room-temperature mechanical property test result of 20 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 2.

Comparative example 1:

The alloying component (mass percent) of cast magnesium alloy: 3.84%Al, 1.14%Ce, 1.24%La, 0.13%Sm, 0.08%Nd, 0.32%Gd, 0.22%Y, 0.25%Si, 0.40%Li, 0.5%Zn, 0.30%Mn are other inevitably miscellaneous For matter less than 0.2%, remaining is Mg.

The room-temperature mechanical property test result of 1 magnesium alloy ingot of comparative example of the present invention is as shown in table 2.

Table 2 is the tough high-modulus wrought magnesium alloy room temperature of height that 1~embodiment of the embodiment of the present invention 20 and comparative example 1 obtain Mechanical experimental results.

Table 2

As shown in Table 2, the tough high-modulus wrought magnesium alloy of height that the embodiment of the present invention obtains has excellent room temperature mechanics Performance significantly improves the elasticity modulus of magnesium alloy while guaranteeing obdurability.

Embodiment 21

The surface scale for the magnesium alloy ingot that the embodiment of the present invention 18 is obtained removes, then that it is uniform at 500 DEG C After changing processing 1.0 hours, is applied on the magnesium alloy ingot surface and be covered with aquadag, the extrusion die after being preheated 2 hours at 150 DEG C High tough high-modulus wrought magnesium alloy is obtained through plastic deformation.The extrusion process is single extrusion, extrusion ratio 100:1；It squeezes Pressure rate is 0.2m/min, and after extrusion demoulding, the type of cooling is air-cooled.

The room-temperature mechanical property test result of 21 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 3.

Embodiment 22

The surface scale for the magnesium alloy ingot that the embodiment of the present invention 18 is obtained removes, then that it is uniform at 400 DEG C After changing processing 6.0 hours, is applied on the magnesium alloy ingot surface and be covered with aquadag, the extrusion die after being preheated 1.5 hours at 250 DEG C Tool obtains high tough high-modulus wrought magnesium alloy through plastic deformation.The extrusion process is single extrusion, extrusion ratio 49:1；It squeezes Pressure rate is 0.1m/min, and after extrusion demoulding, the type of cooling is water cooling.

The room-temperature mechanical property test result of 22 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 3.

Embodiment 23

The surface scale for the magnesium alloy ingot that the embodiment of the present invention 18 is obtained removes, then that it is uniform at 200 DEG C After changing processing 10.0 hours, is applied on the magnesium alloy ingot surface and be covered with aquadag, the extrusion die after being preheated 1 hour at 400 DEG C Tool obtains high tough high-modulus wrought magnesium alloy through plastic deformation.The extrusion process is single extrusion, extrusion ratio 4:1；It squeezes Pressure rate is 0.01m/min, and after extrusion demoulding, the type of cooling is water cooling.

The room-temperature mechanical property test result of 23 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 3.

Embodiment 24

The surface scale for the magnesium alloy ingot that the embodiment of the present invention 18 is obtained removes, then that it is uniform at 400 DEG C After changing processing 6.0 hours, is applied on the magnesium alloy ingot surface and be covered with aquadag, the extrusion die after being preheated 1.5 hours at 250 DEG C Tool obtains high tough high-modulus wrought magnesium alloy through plastic deformation.The extrusion process is to squeeze twice, and what is squeezed for the first time squeezes Pressure ratio is 4:1, extruding rate 0.2m/min；Second of extrusion ratio squeezed is 49:1, extruding rate 0.1m/min.It squeezes After part demoulding, the type of cooling is water cooling.

The room-temperature mechanical property test result of 24 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 3.

Embodiment 25

The surface scale for the magnesium alloy ingot that the embodiment of the present invention 18 is obtained removes, then that it is uniform at 500 DEG C After changing processing 1.0 hours, it is covered with aquadag on the magnesium alloy ingot surface and forging mold painting, after 250 DEG C preheat 2 hours Forging mold obtain high tough high-modulus wrought magnesium alloy through plastic deformation.The forging technology is single forging and forming, forging Making upper and lower mould is plane mould, and forging reduction in pass is 60%, and forging rate is 90mm/min, after forging demoulding, cooling side Formula is air-cooled.

The room-temperature mechanical property test result of 25 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 3.

Embodiment 26

The surface scale for the magnesium alloy ingot that the embodiment of the present invention 18 is obtained removes, then that it is uniform at 400 DEG C After changing processing 6.0 hours, it is covered with aquadag on the magnesium alloy ingot surface and forging mold painting, is preheated 1.5 hours at 300 DEG C Forging mold afterwards obtains high tough high-modulus wrought magnesium alloy through plastic deformation.The forging technology is single forging and forming, Forging upper and lower mould is plane mould, and forging reduction in pass is 30%, and forging rate is 50mm/min, after forging demoulding, cooling Mode is water cooling.

The room-temperature mechanical property test result of 26 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 3.

Embodiment 27

The surface scale for the magnesium alloy ingot that the embodiment of the present invention 18 is obtained removes, then that it is uniform at 200 DEG C After changing processing 10.0 hours, it is covered with aquadag on the magnesium alloy ingot surface and forging mold painting, is preheated 1 hour at 400 DEG C Forging mold afterwards obtains high tough high-modulus wrought magnesium alloy through plastic deformation.The forging technology is single forging and forming, Forging upper and lower mould is plane mould, and forging reduction in pass is 10%, and forging rate is 3mm/min, after forging demoulding, cooling side Formula is water cooling.

The room-temperature mechanical property test result of 27 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 3.

Embodiment 28

The surface scale for the magnesium alloy ingot that the embodiment of the present invention 18 is obtained removes, then that it is uniform at 400 DEG C After changing processing 6.0 hours, it is covered with aquadag on the magnesium alloy ingot surface and forging mold painting, is preheated 1.5 hours at 250 DEG C Forging mold afterwards obtains high tough high-modulus wrought magnesium alloy through plastic deformation.The forging technology is forging and forming twice, Forging upper and lower mould is plane mould, and forging and pressing drafts for the first time is 10%, and forging rate is 90mm/min；Second of forging and stamping pressure Amount is 50%, and forging rate is 50mm/min.After forging demoulding, the type of cooling is water cooling.

The room-temperature mechanical property test result of 28 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 3.

Embodiment 29

The surface scale for the magnesium alloy ingot that the embodiment of the present invention 18 is obtained removes, then that it is uniform at 500 DEG C After changing processing 1.0 hours, it is covered with aquadag on the magnesium alloy ingot surface and roll painting, roll preheating temperature is 200 DEG C.Institute Stating rolling mill practice can roll for single track, and rolling pass drafts is 60%, and rolling rate is 1m/min, cold after rolled parts demoulding But mode is air-cooled.

The room-temperature mechanical property test result of 29 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 3.

Embodiment 30

The surface scale for the magnesium alloy ingot that the embodiment of the present invention 18 is obtained removes, then that it is uniform at 400 DEG C After changing processing 6.0 hours, it is covered with aquadag on the magnesium alloy ingot surface and roll painting, roll preheating temperature is 150 DEG C.Institute Stating rolling mill practice can roll for single track, and rolling pass drafts is 30%, and rolling rate is 2m/min, cold after rolled parts demoulding But mode is water cooling.

The room-temperature mechanical property test result of 30 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 3.

Embodiment 31

The surface scale for the magnesium alloy ingot that the embodiment of the present invention 18 is obtained removes, then that it is uniform at 200 DEG C After changing processing 10.0 hours, it is covered with aquadag on the magnesium alloy ingot surface and roll painting, roll preheating temperature is 80 DEG C.Institute Stating rolling mill practice can roll for single track, and rolling pass drafts is 5%, and rolling rate is 5m/min, cooling after rolled parts demoulding Mode is water cooling.

The room-temperature mechanical property test result of 31 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 3.

Embodiment 32

The surface scale for the magnesium alloy ingot that the embodiment of the present invention 18 is obtained removes, then that it is uniform at 400 DEG C After changing processing 6.0 hours, it is covered with aquadag on the magnesium alloy ingot surface and roll painting, roll preheating temperature is 150 DEG C.Institute Stating rolling mill practice can roll for two pass, and first time roll reduction is 10%, and rolling rate is 5m/min；Second of rolling pressure Amount is 50%, and rolling rate is 2m/min.After rolled parts demoulding, the type of cooling is water cooling.

The room-temperature mechanical property test result of 32 magnesium alloy deformation part of the embodiment of the present invention is as shown in table 3.

Table 3 is the tough high-modulus wrought magnesium alloy room-temperature mechanical property of height that 21~embodiment of the embodiment of the present invention 32 obtains Test result.

Table 3

	Tensile strength/MPa	Elongation percentage/%	Modulus/GPa
				Embodiment 21	331	11.7	56.7
Embodiment 22	362	12.7	61.4
				Embodiment 23	328	11.9	57.4
Embodiment 24	374	13.2	59.1
				Embodiment 25	364	13.4	59.1
Embodiment 26	381	12.9	58.7
				Embodiment 27	356	12.4	57.1
Embodiment 28	387	13.6	59.6
				Embodiment 29	361	13.5	59.7
Embodiment 30	376	12.7	59.4
				Embodiment 31	357	12.1	57.1
Embodiment 32	389	13.8	63.1

Embodiment 33

The tough high-modulus wrought magnesium alloy of height that the embodiment of the present invention 32 obtains is carried out to 32 hours timeliness at 175 DEG C Processing, the type of cooling of the ageing treatment are air-cooled.

The room-temperature mechanical property test result of the embodiment of the present invention 33 is as shown in table 4.

Embodiment 34

The tough high-modulus wrought magnesium alloy of height that the embodiment of the present invention 32 obtains is carried out to 4 hours timeliness at 200 DEG C Processing, the type of cooling of the ageing treatment are water cooling.

The room-temperature mechanical property test result of the embodiment of the present invention 34 is as shown in table 4.

Embodiment 35

The tough high-modulus wrought magnesium alloy of height that the embodiment of the present invention 32 obtains is carried out to 1 hour timeliness at 225 DEG C Processing, the type of cooling of the ageing treatment are water cooling.

The room-temperature mechanical property test result of the embodiment of the present invention 35 is as shown in table 4.

Embodiment 36

The tough high-modulus wrought magnesium alloy of height that the embodiment of the present invention 32 obtains is carried out to solid solution in 4 hours at 300 DEG C Processing and carries out 32 hours ageing treatments at 175 DEG C, the type of cooling of the solid solution and ageing treatment is water cooling.

The room-temperature mechanical property test result of the embodiment of the present invention 36 is as shown in table 4.

Embodiment 37

The tough high-modulus wrought magnesium alloy of height that the embodiment of the present invention 32 obtains is carried out consolidating for 0.5 hour at 350 DEG C The molten ageing treatment handled and 4 hours are carried out at 200 DEG C, the type of cooling of the ageing treatment are water cooling.

The room-temperature mechanical property test result of the embodiment of the present invention 37 is as shown in table 4.

Embodiment 38

The tough high-modulus wrought magnesium alloy of height that the embodiment of the present invention 32 obtains is carried out consolidating for 0.1 hour at 500 DEG C The type of cooling of the molten ageing treatment handled and 1 hour is carried out at 225 DEG C, the solid solution and ageing treatment is water cooling.

The room-temperature mechanical property test result of the embodiment of the present invention 38 is as shown in table 4.

Table 4 is the tough high-modulus wrought magnesium alloy room-temperature mechanical property test knot of height that 33~embodiment of embodiment 38 obtains Fruit.

Table 4

	Tensile strength/MPa	Elongation percentage/%	Modulus/GPa
				Embodiment 33	381	11.7	65.8
Embodiment 34	403	11.1	68.2
				Embodiment 35	391	13.4	65.2
Embodiment 36	371	12.1	65.4
				Embodiment 37	399	10.7	69.4
Embodiment 38	394	13.1	65.7

As shown in Table 4, heat treatment process provided by the invention can be further improved the obdurability and springform of magnesium alloy Amount.The obdurability and elasticity modulus for the heat treatment process raising alloy that wherein embodiment 37 provides are the most significant.

Claims

1. a kind of high tough high-modulus wrought magnesium alloy, which is characterized in that be made of following element by mass percentage: The Al of a%, the mixing of one or more of La, Ce, Pr of b%, the Mn of c%, total RE rare earth Gd containing d%, Y, one or more of Sm, Nd, Er, Eu, Ho, Tm, Lu, Dy, Yb element, add up to Si, Ge containing e%, Ca, Li, Sn, One or more of Zn, Sb element, impurity of the total amount less than 0.2%, surplus Mg；Wherein, a, b, c, d and e meet following Formula (1)~(5),

(1)3.5≤a≤6.0；

(2)0.5≤b≤4.5；

(3)0.01≤c≤1.0；

(4)0.01≤d≤2.5；

(5)0<e≤4.0。

2. the tough high-modulus wrought magnesium alloy of height according to claim 1, which is characterized in that

The value range of d in the formula (4) are as follows: 0.1≤d≤2.0, and/or

The value range of e in the formula (5) are as follows: 0.2≤e≤4.0.

3. the tough high-modulus wrought magnesium alloy of height according to claim 1 characterized by comprising

(III) Al-Mn nanometers of ageing strengthening phases.

4. the tough high-modulus wrought magnesium alloy of height according to claim 1, which is characterized in that the deformed magnesium alloy material In, 3.6%≤b+d≤7.0%.

5. the tough high-modulus wrought magnesium alloy of height according to claim 4, which is characterized in that the deformed magnesium alloy material In, 4.5%≤b+d≤6.0%.

6. the preparation method of any one of Claims 1 to 5 height is tough high-modulus wrought magnesium alloy, which is characterized in that including Following steps:

S1: molten alloy, by pure Mg, pure Al, magnesium rare earth intermediate alloy, aluminium manganese or magnesium manganese intermediate alloy and remaining component point It does not preheat；Wherein, preheating temperature is 200~250 DEG C, and preheating time is 2~6 hours；

S2: the pure Mg after preheating is completely melt in protective atmosphere；Pure Al after preheating is added at 670~690 DEG C；When Temperature is raised to 720~740 DEG C, the intermediate alloy or pure metal after preheating is added；After intermediate alloy or pure metal are completely melt 720~740 DEG C are warming up to, the refining agent of Mg alloy containing inorganic salts is added and is refined, it is quiet in 710~730 DEG C of progress after refining It sets, skimming operation after being cooled to 680~700 DEG C, melt is cast to and is preheating to 200~300 DEG C of metal type dies or sand mold Mold obtains magnesium alloy ingot；

7. the preparation method of high tough high-modulus wrought magnesium alloy according to claim 6, which is characterized in that in step S1, The magnesium rare earth intermediate alloy is magnesium cerium-rich mischmetal intermediate alloy, in magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium praseodymium Between alloy, magnesium samarium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium richness yttrium mixed rare earth intermediate alloy, among magnesium neodymium Alloy, magnesium praseodymium neodymium mixed rare-earth intermediate alloy, magnesium erbium intermediate alloy, magnesium europium intermediate alloy, magnesium holmium intermediate alloy, magnesium thulium centre are closed The combination of one or more of gold, magnesium lutetium intermediate alloy, magnesium dysprosium intermediate alloy, magnesium ytterbium intermediate alloy intermediate alloy；Wherein: institute It states and contains tri- kinds of rare earth elements of La, Ce, Pr in cerium-rich mischmetal；

Remaining described group is divided into Mg-based master alloy or contained aluminium-base intermediate alloy or pure metal；Wherein:

The Mg-based master alloy is magnesium silicon intermediate alloy, magnesium calcium intermediate alloy, magnesium lithium intermediate alloy, magnesium zinc intermediate alloy, magnesium The combination of one or more of antimony intermediate alloy intermediate alloy；

The contained aluminium-base intermediate alloy is aluminium silicon intermediate alloy, aluminium germanium intermediate alloy, aluminium calcium intermediate alloy, aluminium lithium intermediate alloy, aluminium The combination of one or more of tin intermediate alloy, aluminium antimony intermediate alloy intermediate alloy；

The pure metal is one or both of pure silicon, pure zinc.

8. the preparation method of high tough high-modulus wrought magnesium alloy according to claim 6, which is characterized in that in step S2,

Refining agent is added to be refined, at 720 DEG C after refining, is stood；

The protective atmosphere is SF₆And CO₂Mixed gas, and SF₆And CO₂Volume ratio be 1:99；

The refining agent is the inorganic salts refining agent of Mg alloy or carbon trichloride of sodium salt, sylvite, villiaumite, and additional amount is all originals Expect the 1-5% of gross mass.

9. the preparation method of high tough high-modulus wrought magnesium alloy according to claim 6, which is characterized in that in step S3,

The extrusion process are as follows: the surface scale of the obtained magnesium alloy ingot of step S2 is removed, then by it 200~ 500 DEG C after Homogenization Treatments 1.0~10.0 hours, apply on the magnesium alloy ingot surface and are covered with magnesium alloy lubricant, 150~ 400 DEG C of extrusion dies after preheating 1~2 hour obtain high tough high-modulus wrought magnesium alloy through plastic deformation；Wherein:

The magnesium alloy lubricant is aquadag；

The extrusion process is single extrusion or repeatedly to repeatedly extrude, and extrusion ratio is 4~100:1, extruding rate for 0.01~ 0.2m/min, after extrusion demoulding, the type of cooling is air-cooled or water cooling；

The forging technology are as follows: the surface scale of the obtained magnesium alloy ingot of step S2 is removed, then by it 200~ 500 DEG C are covered with magnesium alloy lubrication after Homogenization Treatments 1.0~10.0 hours, on the magnesium alloy ingot surface and forging mold painting Agent, the forging mold after preheating 1~2 hour at 250~400 DEG C obtain high tough high-modulus wrought magnesium alloy through plastic deformation； Wherein: the forging technology is that single forges and presses or the repetition forging and forming less than 3 times, forging reduction in pass are 10~60%, Forging rate is 3~90mm/min, and after forging demoulding, the type of cooling is air-cooled or water cooling；

The rolling mill practice are as follows: the surface scale of the obtained magnesium alloy ingot of step S2 is removed, then by it 200~ 500 DEG C are covered with magnesium alloy lubricant after Homogenization Treatments 1.0~10.0 hours, on the magnesium alloy ingot surface and roll painting, Roll preheating temperature is 80~200 DEG C；Wherein: the rolling mill practice is that single track rolls or multiple tracks rolls, rolling pass drafts It is 5~60%, rolling rate is 1~5m/min, and after rolled parts demoulding, the type of cooling is air-cooled or water cooling.

10. the preparation method of high tough high-modulus wrought magnesium alloy according to claim 6, which is characterized in that further include pair Magnesium alloy deformation part obtained by step S3 carries out including at the heat of solution treatment and artificial aging processing or direct labor's ageing treatment Reason is strengthened；Wherein:

The temperature of the solution treatment is 300~500 DEG C, and the time is 0.1~4 hour

The temperature of the artificial aging processing is 175~225 DEG C, and the time is 1~32 hour.