CN110195181A - A kind of diecast magnesium alloy and its manufacturing method with high-temperature heat-resistance performance - Google Patents
A kind of diecast magnesium alloy and its manufacturing method with high-temperature heat-resistance performance Download PDFInfo
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- CN110195181A CN110195181A CN201810158747.8A CN201810158747A CN110195181A CN 110195181 A CN110195181 A CN 110195181A CN 201810158747 A CN201810158747 A CN 201810158747A CN 110195181 A CN110195181 A CN 110195181A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
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Abstract
The invention discloses a kind of diecast magnesium alloy with high-temperature heat-resistance performance, chemical element mass percents are as follows: 5~9wt% of Ca 1~4wt%, Al, 0.5~3wt% of RE, Sr 0.1~0.5wt% of 2~5wt%, Mn, surplus are Mg and other inevitable impurity.In addition, the invention also discloses a kind of manufacturing methods of above-mentioned diecast magnesium alloy with high-temperature heat-resistance performance.The diecast magnesium alloy has a high-temperature heat-resistance performance, and intensity is high, good heat conductivity, and the thermal conductivity for well solving existing magnesium alloy is insufficient, intensity is not high, heat resistance is not high and the problem of die-cast performance difference.
Description
Technical field
The present invention relates to a kind of alloy and its manufacturing method more particularly to a kind of magnesium alloy and its manufacturing methods.
Background technique
Mg-Al-RE system magnesium alloy has excellent casting character and mechanical property, the high-melting-point that RE is generated in conjunction with Al
Al11RE3The room temperature and mechanical behavior under high temperature for being mutually conducive to improve alloy, cause alloy to have good room temperature obdurability and high temperature
Heat resistance.On the other hand, the Al of generation11RE3The aluminium content in alloy can be significantly reduced, the thermal conductivity of alloy is improved.Therefore, AE
It is magnesium alloy is a kind of potential high thermal conductivity cast magnesium alloy.But the thermal conductivity for the Mg-Al-RE casting alloy developed at present is equal
Lower than 100W/mK, room temperature intensity is also to be improved.Therefore, the high-strength casting magnesium of novel casting high thermal conductivity of good performance is developed
Alloy is of great significance to the needs of light high heat conducting radiator to meeting electronic product.Mg-Al-RE system magnesium alloy at present
The rare earth of addition is mainly the light mischmetal of rich cerium.
Magnesium-aluminum-based alloy is added in alkaline earth element can be precipitated the very high Al-Ca or Al-Sr phase of fusing point in the base.These Gao Rong
Point is mutually very stable at high temperature, plays good pinning effect to crystal boundary, can be effectively improved the mechanical behavior under high temperature of magnesium alloy, special
It is not creep-resistant property.Therefore, heat resistance magnesium alloy of the developing low-cost containing alkaline earth elements such as Sr and Ca is to popularization magnesium alloy in vapour
The application of car engine periphery heat-resistant part is of great significance.It is applied to automobile power based on heat resistance magnesium alloys such as AZ and AS systems
The limitation that system shows, it is heat resistance magnesium alloy series that Canadian Nuo Lunda company, which has developed AJ (Mg-Al-Sr), such as
The alloy of the trades mark such as AJ50x, AJ51x, AJ52x, AJ62x and AJ62Lx, wherein AJ62x oneself be employed successfully in production food tray and valve
The thin-wall Mg alloys components such as door closure.The maximum operating temperature of AJ62x heat resistance magnesium alloy is up to 175 DEG C, mechanical properties
AZ91 diecast magnesium alloy is significantly better than with croop property.In recent years, automobile engine Surrounding Parts are to heat resistance magnesium alloy
More stringent requirements are proposed for heat resistance, need to develop heat resisting temperature up to 200 DEG C of high-strength temperature-resistant diecast magnesium alloy.
And pure magnesium thermal conductivity with higher, about 157W/mK, but intensity is too low, the tensile yield strength under as cast condition
About 21MPa.Alloy element is added in magnesium can be obviously improved its mechanical property, but due to the addition of alloying element, lead to
Often its thermal conductivity can be made to be substantially reduced.Thus, in recent years, the country gradually has some high conductive high strength heat resistance magnesium alloys by successively
It developed, but these alloys are substantially deforming alloy, be not appropriate for die casting use.
Such as: Publication No. CN1804083, publication date are on July 19th, 2006, and entitled " high-strength heat-resistant rare earth magnesium closes
The Chinese patent literature of gold ", technical solution disclosed in the patent document is related to a kind of high-strength heat-resistant rare earth magnesium alloy, but it is simultaneously
Be not suitable for doing diecast magnesium alloy use.Additionally due to the alloy contains: the yttrium member of the gadolinium element of 2~10 mass %, 3~12 mass %
Element and both quality comprehensive reach 13-14 mass %, and remainder is made of magnesium and inevitable impurity, i.e., the alloy at
Divide valuableness, specific gravity is larger, low so as to cause the alloy thermal conductivity.
Another example is: Publication No. CN101376938, publication date is on March 4th, 2009, and entitled " a kind of novel flame-retardant is high
The Chinese patent literature of strength heatproof magnesium alloy and preparation method thereof ", technical solution disclosed in the patent document are related to a kind of new
Type flame-retardant high-strength heat-resistant magnesium alloy and preparation method thereof, in the technical scheme, design of alloy is, on the basis of AZ91D
On, add the Ca, the Sr of the RE and 0.05-0.15% of 0.2-0.8% of 0.3-1.0 mass %；Wherein RE is general richness La mixing
Rare earth.The room temperature of the alloy, 150 DEG C, 200 DEG C of mechanical properties are all significantly improved；But strength level is high not enough, especially
High-temperature behavior (alloy strength at its 150 DEG C is less than 185MPa), and its heating conduction is lower, is not able to satisfy the work such as gear-box
Practical application request under environment.
Based on this, it can be seen that reported very about the ingredient design of high thermal conductivity high-strength temperature-resistant diecast magnesium alloy at present both at home and abroad
It is few, lack alloying element to the research in terms of the affecting laws and its mechanism of magnesium alloy thermal conductivity and heat resistance, novel height is led
The high-strength heat-resistant magnesium alloy of heat and its related technology of preparing lagging in development, are unable to satisfy user market for high thermal conductivity high-strength temperature-resistant
The urgent need of diecast magnesium alloy, accordingly, it is desirable to obtain a kind of magnesium alloy with high-temperature heat-resistance performance, intensity is high, thermally conductive
Performance is good, and the thermal conductivity for well solving existing magnesium alloy is insufficient, intensity is not high, heat resistance is not high and die-cast performance is poor
The problem of.
Summary of the invention
One of the objects of the present invention is to provide a kind of diecast magnesium alloy with high-temperature heat-resistance performance, the diecast magnesium alloys
There is a high-temperature heat-resistance performance, intensity is high, good heat conductivity, the thermal conductivity for well solving existing magnesium alloy is insufficient, intensity is not high,
The not high problem with die-cast performance difference of heat resistance.
To achieve the goals above, the invention proposes a kind of diecast magnesium alloy with high-temperature heat-resistance performance, chemistry
Element mass percent are as follows:
1~4wt% of Ca,
5~9wt% of Al,
0.5~3wt% of RE,
2~5wt% of Sr,
0.1~0.5wt% of Mn,
Surplus is Mg and other inevitable impurity.
For technical solutions according to the invention, inventor is obtained by the reasonably optimizing to alloying element
A kind of diecast magnesium alloy with high-temperature heat-resistance performance, and added according to the alloying element of diecasting alloys to alloy final performance
It influences and magnesium alloy high thermal conductivity alloyization needs, inventor studies a variety of alloying elements in magnesium through a large number of experiments
In effect and its many factors to the affecting laws of alloy die cast, and therefrom find, when adding alkaline earth in magnesium alloy
When metal (such as Sr, Ca) and rare earth element, diecast magnesium alloy has excellent room temperature intensity and high temperature resistant croop property, well
Die casting performance and higher thermal conductivity.Further, since joined alkaline-earth metal and rare earth element in diecast magnesium alloy, make its life
Thus the intensity and heat resistance of diecast magnesium alloy are improved, pressure is further improved at tiny second phase of a variety of high-melting-point sizes
Cast the die casting performance of magnesium alloy.
In addition, the characteristics of being directed to diecasting alloys is typically compared with low melting point, and the mobility that melt has had, crystallization temperature
Section is small, and the tendency for being quickly cooled down hot tearing is small, and filling velocity is high when so as to meet die casting, cooling velocity is fast and is cast into
Complicated mold cavity can be filled in complex-shaped, thin-section casting needs, therefore, right in order to obtain suitable diecast magnesium alloy
Magnesium alloy ingredient is also required to consider the alloy element that addition help to obtain these characteristics when designing, to rationally design magnesium conjunction
Golden ingredient.
Based on this, inventor proposes a kind of diecasting alloys with high-temperature heat-resistance performance, chemical element quality
Percentage are as follows: Ca 1~4wt%, Al 5~9wt%, RE 0.5~3wt%, Sr 2~5wt%, Mn 0.1~0.5wt%, it is remaining
Amount is Mg and other inevitable impurity, and each chemical element design principle is as described below in diecast magnesium alloy:
Ca: one of alkaline earth element acts synergistically with Sr, Grain Refinement Effect can be generated in magnesium, also can inhibit molten
Melt the oxidation of magnesium, also there is flame retardant effect, the ignition temperature of alloy melt can be improved, and the croop property of alloy can be improved.
The element can form the second phase with elements other in magnesium, and the very high orderly single layer nano junction of invigoration effect especially can be obtained
Structure, for improving the mechanical property effect of magnesium alloy clearly.In order to control appearance the second phase amount and type, with keep
Preferable thermal conductivity exists in the mass percent of the diecast magnesium alloy control Ca of the present invention with high-temperature heat-resistance performance
1~4wt% of Ca.
Al:Al is the most common alloying element of magnesium alloy, and density is smaller, and Al can form limit solid solution with magnesium,
Casting character can be improved while improving the alloy strength and hardness of diecast magnesium alloy.In addition, Al can also pass through heat treatment
Ageing strengthening is generated, while Al can widen solidification zone, improves casting character, especially improve the mobility of diecast magnesium alloy
Can, optimization can die casting performance.According to the discovery of inventor, the thermal conductivity of magnesium alloy is with solid solution atomic quantity increase
And reduce, therefore, it is necessary to control the content of aluminium element to keep good thermal conductivity, magnesium can be seriously reduced to avoid Al element
The heating conduction of alloy.The high magnesium alloy of thermal conductivity in order to obtain cannot add excessive Al as alloy element, when the matter of Al
When amount percentage is increased to 9%, the thermal conductivity obtained for pushing down magnesium alloy drops to the one third of pure magnesium.Therefore, at this
In the invention diecast magnesium alloy with high-temperature heat-resistance performance, the mass percent of Al is controlled in 5~9wt%.
RE: rare earth element (RE) is important alloying element, has purification alloy solution, refining alloy tissue, improves and close
The effects of golden room temperature and mechanical behavior under high temperature.But rare earth element is expensive, in order to control cost of alloy, additive amount cannot
Excessively.Rare earth atoms diffusivity is poor, and magnesium alloy recrystallization temperature can be improved and can be precipitated again and stablize the second phase, thus
The elevated temperature strength and heat resistance of magnesium alloy can be increased substantially.Technical solutions according to the invention are alloy properties in order to advanced optimize
Can, it uses and further adds mass percent on the basis of the diecast magnesium alloy of this case is Mg-Al-Sr-Ca-Mn multicomponent alloy
Alloy hot cracking tendency is reduced, while giving birth in the alloy to improve the mobility of alloy for the rare earth element of 0.5~3wt%
At suitable nanoscale hardening constituent, the die casting with the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance
High-termal conductivity and high tough excellent mechanical performance, especially mechanical behavior under high temperature can be taken into account while energy.
Sr: one kind of alkaline earth element acts synergistically with Ca, Grain Refinement Effect can be generated in magnesium, also can inhibit melting
The oxidation of magnesium also has flame retardant effect, the ignition temperature of alloy melt can be improved, and can improve the croop property of alloy.It should
Element can form the second phase with elements other in magnesium, and the very high orderly single layer nanometer structure of invigoration effect especially can be obtained,
For improving the mechanical property effect of magnesium alloy clearly.In order to control appearance the second phase amount and type, with keep compared with
Good thermal conductivity controls the mass percent of Sr in Sr in the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance
2~5wt%.
Mn: for diecast magnesium alloy of the present invention, since there are Fe element is miscellaneous during addition alloying element
Matter, and Fe element impurity is the main reason for causing corrosion stability of magnesium alloy poor, therefore adds Mn element and make by precipitating Fe-Mn
Compound controls the content of iron tramp, so as to improve corrosion stability of magnesium alloy energy；Meanwhile Mn element can increase in magnesium it is heat-resisting
Property, the grain structure of energy Refining Mg Alloy, reinforced alloys.In the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance
In, after the Mn element that addition mass percent is 0.1-0.5%, diecast magnesium alloy creep resistance is dramatically increased, and heat resistance improves.
Further, in the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance, microstructure includes
Magnesium matrix and the second phase being precipitated, second phase includes Al-Ca phase, Al-Sr phase, Al-RE phase and Al-Mn phase.
Solid solution atom and second in technical solutions according to the invention, in the heating conduction of magnesium alloy and the magnesium alloy
The value volume and range of product of phase has close ties, therefore, in order to obtain the diecast magnesium alloy with high-temperature heat-resistance performance, promotes die casting magnesium
Alloy thermal conductivity, the quantity of atom is dissolved in this case suitable control magnesium alloy, at the same guarantee its precipitated phase size cannot it is too big,
Quantity cannot be too many.
It should be noted that in the present case, Al-Ca phase, Al-Sr phase, Al-RE phase and Al-Mn phase use the second phase institute
Including member usually indicate, but the expression be not meant to element included by the second phase atomic ratio be 1:1, specifically,
By taking Al-Ca phase as an example, Al-Ca phase indicates that the second phase of this kind includes Al and Ca element, it is not intended that the atom of Al and Ca is certain
It is 1:1.
Further, in the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance, the Al-Ca phase is at least
Including Al2Ca。
Further, in the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance, the RE element includes
At least one of La, Gd and Y.
Further, in the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance, Al constituent content be 6~
9wt%.
Further, in the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance, Sr+Ca >=4wt%.
Further, in the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance, RE constituent content is 0.9
~3wt%.
Further, in the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance, in 200 DEG C, 70MPa
Under creep rate≤9.1 × 10-9s-1。
Further, in the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance, heat at room temperature
Conductance is greater than 85W/mK.
Further, in the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance, at room temperature bend
Take intensity >=158MPa, tensile strength >=248MPa, elongation percentage >=4.5%.
Further, in the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance, bending at 150 DEG C
Take intensity >=138MPa, tensile strength >=200MPa, elongation percentage >=10%.
Further, in the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance, bending at 200 DEG C
Take intensity >=130MPa, tensile strength >=188MPa, elongation percentage >=13%.
Correspondingly, another object of the present invention is to provide a kind of above-mentioned diecast magnesium alloys with high-temperature heat-resistance performance
Manufacturing method, it is high by manufacturing method diecast magnesium alloy intensity obtained, thermal conductivity is good.
To achieve the goals above, the invention proposes a kind of above-mentioned diecast magnesium alloys with high-temperature heat-resistance performance
Manufacturing method, comprising steps of
(1) crucible is put into heating furnace and is preheated, then spray release agent in crucible internal walls；
(2) pure magnesium ingot is put into crucible and is passed through SF6And CO2Mixed gas, heating are completely melt pure magnesium, keep the temperature one section
Then time cools to 750 DEG C ± 5 DEG C, pure Al, Mg-Mn intermediate alloy, Mg-RE intermediate alloy, Mg-Ca intermediate alloy is added
With Mg-Sr intermediate alloy；
(3) until completely melted, 730 DEG C ± 5 DEG C are reduced the temperature to, stirring is stood after slagging-off；
(4) crucible is cooling, take out magnesium alloy ingot；
(5) melt in furnace by magnesium alloy ingot in die casting machine is kept the temperature, and the magnesium alloy of fusing is then injected compression mod
In tool, the hot heat-proof compression casting magnesium alloy of the high-strength highly-conductive is obtained.
In manufacturing method of the present invention, in order to obtain the diecast magnesium alloy with high-temperature heat-resistance performance, in addition to examining
Consider other than reasonable alloying element design, is also for this case for process conditions, the especially setting of temperature condition
Highly important, inventor passes through experimental studies have found that under the conditions of above-mentioned temperature, can obtain required die casting
Properties of Magnesium Alloy.
Further, in manufacturing method of the present invention, in the step (1), by crucible be preheating to 300 DEG C ±
5 DEG C, release agent then is sprayed in crucible internal walls.
Further, in manufacturing method of the present invention, in the step (2), when crucible temperature reach 500 DEG C ±
At 5 DEG C, pure magnesium ingot is put into crucible and is passed through SF6And CO2Mixed gas then heats to 770 DEG C ± 5 DEG C, completely molten to pure magnesium
Change, keeps the temperature 10-20min.
Further, in manufacturing method of the present invention, in the step (3), 10-20min is stirred, after slagging-off
Stand 25-35min.
Further, in manufacturing method of the present invention, in the step (4), using annular spray cooling system
System cools down crucible, to be totally submerged crucible in water after Mg alloy surface solidification, so that magnesium alloy ingot is detached from
Crucible.
Further, in manufacturing method of the present invention, in the step (5), holding temperature is 710 DEG C ± 5
DEG C, the magnesium alloy of fusing is injected in die casting with the injection speed of 55-65m/s, the temperature of die casting is 250 DEG C ± 5
DEG C, casting pressure is 60 ± 5MPa.
Diecast magnesium alloy of the present invention with high-temperature heat-resistance performance is excellent by addition alkaline-earth metal and rare earth element
Alloying component is changed, while realizing diecast magnesium alloy with excellent room temperature intensity and high temperature resistant croop property, has also had
Good die casting performance and higher thermal conductivity.
Further, since the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance is added to alkaline-earth metal and rare earth
Element generates tiny second phase of a variety of high-melting-point sizes, improves the intensity and heat resistance of alloy, further improves the die casting of alloy
Performance.
High mechanical properties, the heat resistance that the manufacturing method can obtain through the invention are good, and thermal conductivity is high and presses
Cast the good diecast magnesium alloy of performance.
Specific embodiment
Below in conjunction with specific embodiments to the diecast magnesium alloy of the present invention with high-temperature heat-resistance performance and its
Manufacturing method makes further explanation, however the explanation and illustration does not constitute improper limit to technical solution of the present invention
It is fixed.
Embodiment 1-6 and comparative example 1
Table 1 lists the diecast magnesium alloy with high-temperature heat-resistance performance of embodiment 1-6 and the comparison magnesium of comparative example 1 closes
Each chemical element mass percent in gold.
Table 1. (wt%, surplus are Mg and other inevitable impurity)
The manufacture of the comparison magnesium alloy of the diecast magnesium alloy with high-temperature heat-resistance performance and comparative example 1 of embodiment 1-6
Method, which is adopted, to be prepared by the following steps:
(1) crucible is put into heating furnace and is preheated, crucible is preheating to 300 DEG C ± 5 DEG C, it is then de- in crucible internal walls sprinkling
Mould agent；
(2) when crucible temperature reaches 500 DEG C ± 5 DEG C, pure magnesium ingot is put into crucible and is passed through SF6And CO2Mixed gas,
770 DEG C ± 5 DEG C are then heated to, is completely melt to pure magnesium, 10-20min is kept the temperature, then cools to 750 DEG C ± 5 DEG C, is added pure
Al, Mg-Mn intermediate alloy, Mg-RE intermediate alloy, Mg-Ca intermediate alloy and Mg-Sr intermediate alloy；
(3) until completely melted, 730 DEG C ± 5 DEG C are reduced the temperature to, 10-20min is stirred, stands 25-35min after slagging-off；
(4) crucible is carried out using annular spray cooling system, to be totally submerged crucible after Mg alloy surface solidification
In water, so that magnesium alloy ingot is detached from crucible cooling, magnesium alloy ingot is finally taken out；
(5) by magnesium alloy ingot die casting machine melt in furnace keep the temperature, holding temperature be 710 DEG C ± 5 DEG C, then with
The injection speed of 55-65m/s injects the magnesium alloy of fusing in die casting, and the temperature of die casting is 250 DEG C ± 5 DEG C, casting
Making pressure is 60 ± 5MPa, obtains the hot heat-proof compression casting magnesium alloy of the high-strength highly-conductive.
Table 2 lists the diecast magnesium alloy with high-temperature heat-resistance performance of embodiment 1-6 and the comparison magnesium of comparative example 1 closes
The specific process parameter of the manufacturing method of gold.
Table 2.
The comparison magnesium alloy of the diecast magnesium alloy of each embodiment obtained and comparative example 1 is tested for the property, is surveyed
Test result is listed in table 3.
Table 3.
In conjunction with table 1 to table 3 as can be seen that the diecast magnesium alloy of each embodiment of this case is due to using alloying component appropriate
Design and the manufacture of mutually suitable manufacturing method, thus, the good mechanical performance of the diecast magnesium alloy of each embodiment, heat resistance
Good, thermal conductivity is high, creep rate≤9.1 × 10 at 200 DEG C, 70MPa-9s-1, thermal conductivity at room temperature is greater than 85W/
MK, and yield strength >=158MPa at room temperature, tensile strength >=248MPa, elongation percentage >=4.5%.
Meanwhile the performance of the diecast magnesium alloy of each embodiment at high temperature is far superior to comparative example 1, each embodiment of this case
Yield strength >=138MPa at 150 DEG C, tensile strength >=200MPa, elongation percentage >=10%, the surrender at 200 DEG C are strong
Degree >=130MPa, tensile strength >=188MPa, elongation percentage >=13%.
It should be noted that prior art part is not limited to given by present specification in protection scope of the present invention
Embodiment, all prior arts not contradicted with the solution of the present invention, including but not limited to first patent document, formerly
Public publication, formerly openly use etc., it can all be included in protection scope of the present invention.
In addition, in this case in the combination of each technical characteristic and unlimited this case claim documented combination or
It is combination documented by specific embodiment, all technical characteristics that this case is recorded can be freely combined in any way
Or combine, unless generating contradiction between each other.
It is also to be noted that embodiment enumerated above is only specific embodiments of the present invention.The obvious present invention is not
Above embodiments are confined to, the similar variation or deformation made therewith are that those skilled in the art can be from present disclosure
It immediately arrives at or is easy to just to associate, be within the scope of protection of the invention.
Claims (18)
1. a kind of diecast magnesium alloy with high-temperature heat-resistance performance, which is characterized in that its chemical element mass percent are as follows:
1~4wt% of Ca,
5~9wt% of Al,
0.5~3wt% of RE,
2~5wt% of Sr,
0.1~0.5wt% of Mn,
Surplus is Mg and other inevitable impurity.
2. as described in claim 1 with the diecast magnesium alloy of high-temperature heat-resistance performance, which is characterized in that its microstructure includes
Magnesium matrix and the second phase being precipitated, second phase includes Al-Ca phase, Al-Sr phase, Al-RE phase and Al-Mn phase.
3. as claimed in claim 2 with the diecast magnesium alloy of high-temperature heat-resistance performance, which is characterized in that the Al-Ca phase is extremely
It less include Al2Ca。
4. as described in claim 1 with the diecast magnesium alloy of high-temperature heat-resistance performance, which is characterized in that the RE element includes
At least one of La, Gd and Y.
5. as described in claim 1 with the diecast magnesium alloy of high-temperature heat-resistance performance, which is characterized in that Al constituent content is 6
~9wt%.
6. as described in claim 1 with the diecast magnesium alloy of high-temperature heat-resistance performance, which is characterized in that Sr+Ca >=4wt%.
7. as described in claim 1 with the diecast magnesium alloy of high-temperature heat-resistance performance, which is characterized in that RE constituent content is
0.9~3wt%.
8. as described in claim 1 with high-temperature heat-resistance performance diecast magnesium alloy, which is characterized in that its 200 DEG C,
Creep rate≤9.1 × 10 under 70MPa-9s-1。
9. as described in claim 1 with the diecast magnesium alloy of high-temperature heat-resistance performance, which is characterized in that its heat at room temperature
Conductance is greater than 85W/mK.
10. as described in claim 1 with the diecast magnesium alloy of high-temperature heat-resistance performance, which is characterized in that it is at room temperature
Yield strength >=158MPa, tensile strength >=248MPa, elongation percentage >=4.5%.
11. as described in claim 1 with the diecast magnesium alloy of high-temperature heat-resistance performance, which is characterized in that it is at 150 DEG C
Yield strength >=138MPa, tensile strength >=200MPa, elongation percentage >=10%.
12. as described in claim 1 with the diecast magnesium alloy of high-temperature heat-resistance performance, which is characterized in that it is at 200 DEG C
Yield strength >=130MPa, tensile strength >=188MPa, elongation percentage >=13%.
13. the manufacturing method of the diecast magnesium alloy with high-temperature heat-resistance performance as described in any one of claim 1-12,
Characterized in that it comprises the following steps:
(1) crucible is put into heating furnace and is preheated, then spray release agent in crucible internal walls；
(2) pure magnesium ingot is put into crucible and is passed through SF6And CO2Mixed gas, heating are completely melt pure magnesium, heat preservation a period of time,
Then 750 DEG C ± 5 DEG C are cooled to, pure Al, Mg-Mn intermediate alloy, Mg-RE intermediate alloy, Mg-Ca intermediate alloy and Mg- is added
Sr intermediate alloy；
(3) until completely melted, 730 DEG C ± 5 DEG C are reduced the temperature to, stirring is stood after slagging-off；
(4) crucible is cooling, take out magnesium alloy ingot；
(5) melt in furnace by magnesium alloy ingot in die casting machine is kept the temperature, and then injects the magnesium alloy of fusing in die casting,
Obtain the hot heat-proof compression casting magnesium alloy of the high-strength highly-conductive.
14. manufacturing method as claimed in claim 13, which is characterized in that in the step (1), crucible is preheating to 300
DEG C ± 5 DEG C, release agent then is sprayed in crucible internal walls.
15. manufacturing method as claimed in claim 13, which is characterized in that in the step (2), when crucible temperature reaches
At 500 DEG C ± 5 DEG C, pure magnesium ingot is put into crucible and is passed through SF6And CO2Mixed gas then heats to 770 DEG C ± 5 DEG C, to pure
Magnesium is completely melt, keeps the temperature 10-20min.
16. manufacturing method as claimed in claim 13, which is characterized in that in the step (3), stir 10-20min, remove
25-35min is stood after slag.
17. manufacturing method as claimed in claim 13, which is characterized in that cooling using annular spray in the step (4)
System cools down crucible, to be totally submerged crucible in water after Mg alloy surface solidification, so that magnesium alloy ingot is de-
From crucible.
18. manufacturing method as claimed in claim 13, which is characterized in that in the step (5), holding temperature is 710 DEG C
± 5 DEG C, the magnesium alloy of fusing is injected in die casting with the injection speed of 55-65m/s, the temperature of die casting is 250 DEG C
± 5 DEG C, casting pressure is 60 ± 5MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810158747.8A CN110195181B (en) | 2018-02-26 | 2018-02-26 | Die-casting magnesium alloy with high-temperature heat resistance and manufacturing method thereof |
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| CN201810158747.8A CN110195181B (en) | 2018-02-26 | 2018-02-26 | Die-casting magnesium alloy with high-temperature heat resistance and manufacturing method thereof |
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| CN110195181A true CN110195181A (en) | 2019-09-03 |
| CN110195181B CN110195181B (en) | 2021-10-22 |
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| CN201810158747.8A Active CN110195181B (en) | 2018-02-26 | 2018-02-26 | Die-casting magnesium alloy with high-temperature heat resistance and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136511A (en) * | 2020-01-20 | 2021-07-20 | 宝山钢铁股份有限公司 | Magnesium alloy for hub, hub and manufacturing method of hub |
| CN115398017A (en) * | 2020-02-07 | 2022-11-25 | 株式会社镁州港 | Magnesium alloy and method for producing same |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1174243A (en) * | 1996-04-04 | 1998-02-25 | 玛志达株式会社 | Heat-resisting magensium alloy forming member, heat-resisting magnesium alloy for forming and forming method thereof |
| US20010023720A1 (en) * | 2000-02-24 | 2001-09-27 | Mitsubishi Aluminum Co., Ltd. | Die casting magnesium alloy |
| CN1401805A (en) * | 2001-08-23 | 2003-03-12 | 株式会社日本制钢所 | Magnesium alloy and magnesium alloy element with high corrosion resistance |
| JP4723835B2 (en) * | 2004-08-31 | 2011-07-13 | 株式会社新技術研究所 | Magnesium alloy for die casting and magnesium die casting product using the same |
| CN102296219A (en) * | 2011-05-30 | 2011-12-28 | 四川大学 | Mg-Sn-Sr-based magnesium alloy with high strength and toughness and heat resistance |
| CN102676895A (en) * | 2012-05-28 | 2012-09-19 | 哈尔滨工业大学 | Heat-resisting magnesium alloy and preparation method thereof |
| CN102703786A (en) * | 2012-06-28 | 2012-10-03 | 江苏中翼汽车新材料科技有限公司 | Heat-resisting anti-corrosion magnesium alloy for automobile engine cylinder |
| CN104152770A (en) * | 2014-09-11 | 2014-11-19 | 哈尔滨工业大学 | High-intensity high-toughness Mg-Zn-Y-Gd-Zr alloy and preparation method thereof |
| CN105401032A (en) * | 2015-12-14 | 2016-03-16 | 宝山钢铁股份有限公司 | Low-cost high-heat-conducting die casting magnesium alloy and manufacturing method thereof |
| CN107058835A (en) * | 2016-12-29 | 2017-08-18 | 中国科学院长春应用化学研究所 | A kind of high intensity, high temperature creep-resisting diecast magnesium alloy and preparation method thereof |
-
2018
- 2018-02-26 CN CN201810158747.8A patent/CN110195181B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1174243A (en) * | 1996-04-04 | 1998-02-25 | 玛志达株式会社 | Heat-resisting magensium alloy forming member, heat-resisting magnesium alloy for forming and forming method thereof |
| US20010023720A1 (en) * | 2000-02-24 | 2001-09-27 | Mitsubishi Aluminum Co., Ltd. | Die casting magnesium alloy |
| CN1401805A (en) * | 2001-08-23 | 2003-03-12 | 株式会社日本制钢所 | Magnesium alloy and magnesium alloy element with high corrosion resistance |
| JP4723835B2 (en) * | 2004-08-31 | 2011-07-13 | 株式会社新技術研究所 | Magnesium alloy for die casting and magnesium die casting product using the same |
| CN102296219A (en) * | 2011-05-30 | 2011-12-28 | 四川大学 | Mg-Sn-Sr-based magnesium alloy with high strength and toughness and heat resistance |
| CN102676895A (en) * | 2012-05-28 | 2012-09-19 | 哈尔滨工业大学 | Heat-resisting magnesium alloy and preparation method thereof |
| CN102703786A (en) * | 2012-06-28 | 2012-10-03 | 江苏中翼汽车新材料科技有限公司 | Heat-resisting anti-corrosion magnesium alloy for automobile engine cylinder |
| CN104152770A (en) * | 2014-09-11 | 2014-11-19 | 哈尔滨工业大学 | High-intensity high-toughness Mg-Zn-Y-Gd-Zr alloy and preparation method thereof |
| CN105401032A (en) * | 2015-12-14 | 2016-03-16 | 宝山钢铁股份有限公司 | Low-cost high-heat-conducting die casting magnesium alloy and manufacturing method thereof |
| CN107058835A (en) * | 2016-12-29 | 2017-08-18 | 中国科学院长春应用化学研究所 | A kind of high intensity, high temperature creep-resisting diecast magnesium alloy and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136511A (en) * | 2020-01-20 | 2021-07-20 | 宝山钢铁股份有限公司 | Magnesium alloy for hub, hub and manufacturing method of hub |
| CN115398017A (en) * | 2020-02-07 | 2022-11-25 | 株式会社镁州港 | Magnesium alloy and method for producing same |
| CN115398017B (en) * | 2020-02-07 | 2024-05-14 | 株式会社镁州港 | Magnesium alloy and method for producing same |
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| CN110195181B (en) | 2021-10-22 |
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