CN109328239A - Magnesium alloy materials and preparation method thereof - Google Patents
Magnesium alloy materials and preparation method thereof Download PDFInfo
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- CN109328239A CN109328239A CN201780038553.8A CN201780038553A CN109328239A CN 109328239 A CN109328239 A CN 109328239A CN 201780038553 A CN201780038553 A CN 201780038553A CN 109328239 A CN109328239 A CN 109328239A
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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
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
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- Extrusion Of Metal (AREA)
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Abstract
The present invention relates to a kind of magnesium alloy materials and preparation method thereof.An exemplary implementation scheme of the invention provides a kind of magnesium alloy materials, relative to 100 weight % of total amount, the magnesium alloy materials include the Mn of 0.8 weight % to 1.8 weight %, less than or equal to the Ca of 0.2 weight % (except 0%), the Mg and inevitable impurity of surplus, relative to the 100 volume % of whole microscopic structure of the magnesium alloy materials, the magnesium alloy materials have the recrystallized structure more than or equal to 99 volume %.
Description
Technical field
The present invention relates to a kind of magnesium alloy materials and preparation method thereof.
Background technique
Recently, with the continuous development of LED industry, the exploitation of tens watts to several hectowatts of high-power LED illumination is increasingly
It is active.Therefore, the size and weight of the radiating piece of heat of LED are produced from become larger for discharging, and solve these problems change
It obtains quite important.Because the weight of radiating piece accounts for about the 80% of LED illumination total weight, by reducing the weight of radiating piece,
LED efficiency can be effectively improved.Therefore, the weight of radiating piece must actually be reduced.
As relevant light-weight metal, magnesium is constantly subjected to pay close attention to.The density of magnesium is 1.74g/cm3, comprising aluminium and steel
Magnesium is classified as most light metal in structural metal.In addition, the thermal conductivity of pure magnesium is 155W/mK or so, it is contemplated that specific gravity, it is such
Thermal conductivity is quite excellent.But the thermal conductivity of common magnesium alloy is 80W/mK or so, lower than the thermal conductivity of pure magnesium.
This is likely to be caused by the alloying component and preparation process being added to improve mechanical strength.Because being added
Alloying component Solid soluble Nb and the inner materials such as intermetallic compound, dislocation or defect can damage thermal conductivity.
Korean granted patent the 1516378th discloses a kind of preparation method of high thermal conductivity magnesium alloy plate.On although
It states patent and discloses the excellent magnesium alloy of thermal conductivity, but disclose magnesium alloy sheet, it is therefore desirable to further molding, Cai Nengyong
Make heat sink.
In addition, the thermal conductivity of the magnesium alloy sheet is that 120W/mK or so is lower than pure magnesium (155W/mK), therefore is not enough to
Substitute the current material of heat sink in the market.
Therefore, in an exemplary implementation scheme of the invention, by removing unnecessary alloying element and use
Different modes control preparation process, can control the microscopic structure of magnesium alloy materials.In this way, it is superior to provide thermal conductivity
Magnesium alloy materials.
Summary of the invention
Technical problem
The present invention provides a kind of magnesium alloy materials and preparation method thereof.
Technical solution
An exemplary implementation scheme of the invention provides a kind of magnesium alloy materials, described relative to 100 weight % of total amount
Magnesium alloy materials include the Mn of 0.8 weight % to 1.8 weight %, the Ca less than or equal to 0.2 weight % (except 0%), surplus
Mg and inevitable impurity, relative to the 100 volume % of whole microscopic structure of the magnesium alloy materials, the magnesium alloy material
Expect the recrystallized structure for having more than or equal to 99 volume %.
The average crystal grain partial size of the magnesium alloy materials can be 10 μm to 20 μm.
The thermal conductivity of the magnesium alloy materials can be greater than or equal to 135W/mK.
The preparation method of the magnesium alloy materials of another exemplary implementation scheme of the invention may include: alloy molten solution is connected
Cast the spare step of blank；The step of homogenization heat treatment is carried out to the blank；To the base after the homogenization heat treatment
The step of material is preheated；The step of hot extrusion is pressed into squeeze wood is carried out to the blank after the preheating；And to made
The step of squeeze wood is heat-treated.
The step of being heat-treated to made squeeze wood can carry out hot place under 200 DEG C to 400 DEG C of temperature range
Reason.More specifically, heat treatment can carry out 0.5 hour to 2 hours.
Heat can be carried out by direct fashion of extrusion by carrying out the step of hot extrusion is pressed into squeeze wood to the blank after the preheating
It squeezes.
Carrying out the step of hot extrusion is pressed into squeeze wood to the blank after the preheating can be in 350 DEG C to 550 DEG C of temperature model
Enclose lower carry out hot extrusion.More specifically, hot extrusion can be carried out with the speed of 10mpm to 30mpm.
The step of preheating to the blank after the homogenization heat treatment can carry out pre- in indirect heating type heating furnace
Heat.More specifically, 350 DEG C to 550 DEG C of temperature range can be preheating to.
The step of carrying out homogenization heat treatment to the blank can carry out uniformly under 400 DEG C to 500 DEG C of temperature range
Change heat treatment.More specifically, homogenization heat treatment can carry out 10 hours to 16 hours.
Alloy molten solution is casting continuously to form in the spare step of blank, relative to the 100 weight % of melt total amount, the alloy
Melt may include the Mn of 0.8 weight % to 1.8 weight %, less than or equal to the Ca of 0.2 weight % (except 0%), the Mg of surplus
And inevitable impurity.
In addition, alloy molten solution, which is casting continuously to form the spare step of blank, to be connected under 650 DEG C to 750 DEG C of temperature range
Casting.
Furthermore, it is possible to which the alloy molten solution is carried out continuous casting with the velocity interval of 50mm/min to 150mm/min.
Relative to the 100 volume % of whole microscopic structure of the magnesium alloy materials, the magnesium alloy materials, which can have, to be greater than
Or the recrystallized structure equal to 99 volume %.
The average crystal grain partial size of the magnesium alloy materials can be 10 μm to 20 μm.
The thermal conductivity of the magnesium alloy materials can be greater than or equal to 135W/mK.
Invention effect
An exemplary implementation scheme according to the present invention, can provide excellent thermal conductivity high heat dissipation magnesium alloy materials and
Preparation method.
Detailed description of the invention
Fig. 1 is directly squeezed used in the preparation method of the magnesium alloy materials of an exemplary implementation scheme of the invention
The ideograph of formula extruder.
The microscopic structure that Fig. 2 shows the embodiments observed with optical microscopy based on heat treatment temperature after extruding and right
The microscopic structure based on heat treatment temperature after rolling of ratio 1.
Fig. 3 be by the embodiment of the present application and comparative example 5 by squeeze wood surface characteristic whether addition based on Ca ingredient into
The view of row comparison.
Specific embodiment
Advantages of the present invention, feature can be expressly understood referring to attached drawing and example detailed below and realize these
Method.However, the present invention can be implemented in a variety of ways, it is not limited to embodiment disclosed below.It mentions below
Be the sufficiently open present invention for the purpose of embodiment so that those skilled in the art have to summary of the invention it is whole and sufficiently
Understanding, protection scope of the present invention should be subject to claims.Identical appended drawing reference indicates identical in specification in the whole text
Constituent element.
Therefore, in some embodiments, widely-known technique is repeated no more, so as not to the present invention explained it is fuzzy not
Clearly.Unless otherwise defined, the meaning of all terms (including technical terms and scientific terms) used in this specification is just
It is the normally understood meaning of those skilled in the art.In specification in the whole text, certain a part of a certain constituent element of "comprising"
When, it unless there are especially opposite record, otherwise indicates to further include other constituent elements, is not to exclude other compositions to want
Element.Unless otherwise stated, singular is also intended to comprising plural form.
An exemplary implementation scheme of the invention can provide a kind of magnesium alloy materials, relative to 100 weight % of total amount, institute
State the Mn, the Ca, remaining less than or equal to 0.2 weight % (except 0%) that magnesium alloy materials include 0.8 weight % to 1.8 weight %
The Mg of amount and inevitable impurity.
In the case, relative to 100 volume % of the whole microscopic structure of the magnesium alloy materials, the magnesium alloy materials
There can be the recrystallized structure more than or equal to 99 volume %.
More specifically, the microscopic structure of the magnesium alloy materials, which can be, there's almost no the complete of Deformation structure and secondary phase
Full recrystallized structure.
It, can be with by the preparation methods of following magnesium alloy materials further more specifically, for the magnesium alloy materials
Obtain magnesium alloy materials as described above with perfect recrystallization tissue.
The average crystal grain partial size of the magnesium alloy materials can be 10 μm to 20 μm.
It, being averaged the magnesium alloy materials by heat treatment step in the preparation method of following magnesium alloy materials
Size of microcrystal is controlled at as described above.When the average crystal grain partial size of magnesium alloy materials is in the range, thermal conductivity can be
It improves.
In addition, size of microcrystal refers to the diameter of existing crystal grain in analytical unit in this specification.If crystal grain is aspheric
Shape, then size of microcrystal refers to diameter obtained from the diameter for calculating the approximate spheres of the aspherical crystal grain.
The reasons why ingredient and compositional range that alloy is limited in the present invention, is illustrated below.
Manganese (Mn) may include 0.8 weight % to 1.8 weight %.
More specifically, the intensity of magnesium alloy materials is possible to too low if the content of the manganese is less than 0.8 weight %.
On the contrary, many secondary phases will be generated if it is greater than 1.8 weight %, it is likely to result in thermal conductivity decline.
Calcium (Ca) may include being less than or equal to 0.2 weight % (except 0%).
More specifically, when micro-calcium is added, it will improve the ignition temperature of alloy itself, inhibit kindling to play
Effect.In addition, can also play the role of preventing face crack in hot extrusion technique.But if the content of calcium is greater than
0.2 weight % may then will form secondary phase such as Mg2Ca etc..In addition, the additive amount of alloying element is fewer for thermal conductivity
It is more advantageous.Therefore, if maximum additive amount is set as the range, secondary phase would not be formed, thermal conductivity can be prepared
Excellent magnesium alloy materials.
The thermal conductivity of the magnesium alloy materials can be greater than or equal to 135W/mK as a result,.More specifically, can be for 135W/mK extremely
145W/mK。
The preparation method of the magnesium alloy materials of another exemplary implementation scheme of the invention may include: alloy molten solution is connected
Cast the spare step of blank；The step of homogenization heat treatment is carried out to the blank；To the base after the homogenization heat treatment
The step of material is preheated；The step of hot extrusion is pressed into squeeze wood is carried out to the blank after the preheating；And to the extruding
The step of squeeze wood afterwards is heat-treated.
It is possible, firstly, to implement for alloy molten solution to be casting continuously to form the spare step of blank.
It is described that alloy molten solution is casting continuously to form in the spare step of blank, relative to the 100 weight % of alloy molten solution total amount,
The alloy molten solution may include 0.8% to 1.8% Mn, be less than or equal to the Ca of 0.2% (except 0%), the Mg of surplus and not
Evitable impurity.
The ingredient and component of the reasons why limiting the ingredient and component of the alloy molten solution and aforementioned limitation magnesium alloy materials
Reason is identical, therefore repeats no more.
More specifically, by alloy molten solution be casting continuously to form the spare step of blank can under 650 DEG C to 750 DEG C of temperature range into
Row continuous casting.
The casting speed can be 50mm/min to 150mm/min.
In addition, continuous casting may be implemented, and by using electricity by using the blank cutter device to link with casting speed
Magnetic field process (EMC/EMS) can minimize the defect inside and outside blank.
It is then possible to implement the step of carrying out homogenization heat treatment to the blank.
More specifically, homogenization heat treatment can be carried out to the blank under 400 DEG C to 500 DEG C of temperature range.
Further more specifically, homogenization heat treatment 10 hours to 16 hours can be carried out to the blank.
If the temperature for carrying out homogenization heat treatment to the blank is too low or the time is too short, generated not when casting
The Homogenization Treatments of uniform microscopic structure will not smoothly complete.Therefore, in subsequent extrusion technique, squeeze pressure may become
It is high.On the contrary, if to the blank carry out homogenization heat treatment temperature is excessively high or overlong time, it is likely that some
Enriched layer and segregated zone generate partial melting.It is thereby possible to which will lead to blank generates defect.
It is then possible to implement the step of preheating to the blank after the homogenization heat treatment.
The blank after the homogenization heat treatment can be preheated in indirect heating type heating furnace.
More specifically, if preheated in direct-heating type heating furnace to the blank after the homogenization heat treatment,
Then due to direct flame, local surfaces may be overheated.It is thus possible to can have melt surface and cause the danger of fire.
Therefore, the blank can be preheated in indirect heating type heating furnace.
Further more specifically, the indirect heating type heating furnace for example has the induction using high frequency or low frequency induction electric current
Heater (Induction heater), but not limited to this, the mode only directly to jet out flames if it were not for such as torch (torch) is i.e.
It can.
More specifically, the blank after the homogenization heat treatment can be preheating to 350 DEG C to 550 DEG C of temperature range.
Further more specifically, if the blank after the homogenization heat treatment is preheating to the temperature lower than 350 DEG C,
Stress in following hot extrusion steps for being plastically deformed blank will increase, and due to squeeze pressure height, extruder
It can bear very big load.Then, extrusion speed can not be accelerated, therefore productivity can decline.
On the contrary, if the blank after the homogenization heat treatment is preheating to the temperature higher than 550 DEG C, following
Control extrusion speed makes its quickening when squeezing in hot extrusion step, therefore will lead to hair with the friction of extrusion die and plastic deformation
Heat, it is possible to cause the surface temperature of the blank more than the solidus temperature of material.As a result, due to partial melting, it is described
Defect may be generated on the surface of blank.In addition, it is possible that improper coarse grain, this will lead to due to overheat
Surface defect.
It, will not be following by that can be easy to squeeze by the blank preheating time after the homogenization heat treatment
It causes extruder to bear big load in hot extrusion step, and surface defect will not be generated.
It is then possible to implement to carry out the step of hot extrusion is pressed into squeeze wood to the blank after the preheating.More specifically, logical
It crosses before the blank cooling that the step of blank above-mentioned to after the homogenization heat treatment preheats is preheated, it can be rapid
Ground carries out hot extrusion.
More specifically, hot extrusion can be carried out to the blank after the preheating by direct fashion of extrusion.It is further more specific
Ground can use the progress hot extrusion (as shown in Fig. 1 of this application) of direct ram extruder.
Fig. 1 of the application is used in the preparation method of the magnesium alloy materials of an exemplary implementation scheme of the invention
The ideograph of direct ram extruder.
Further more specifically, applying pressure by the pressure head 41 to the direct ram extruder, can will be mounted in
Squeeze wood 12 is made by the extrusion of mold 21 in the blank 11 of extrusion cylinder 31.Therefore, the squeeze wood 12 can using the direction of extrusion with
The identical direct fashion of extrusion of the direction of travel of pressure head 41.
In the case, the mould for being designed to season or squeezing situation temperature-adjustable can be used in the mold 21
Tool, thermal deformation is minimized.It further, also may include multistage mold, bracket etc..
Hot extrusion can be carried out to the blank after the preheating under 350 DEG C to 550 DEG C of temperature range.
More specifically, can be easy to make by carrying out hot extrusion to the blank after the preheating under the temperature range
Standby squeeze wood out not will cause extruder and bear big load, and will not generate surface defect.
Hot extrusion can be carried out with the speed of 10mpm to 30mpm to the blank after the preheating.
More specifically, productivity can be decreased obviously if hot extrusion speed is excessively slow.On the contrary, if extrusion speed mistake
Fastly, then squeeze pressure can become excessively high, therefore extruder is possible to bear excess load.In addition, in some High Temperature And Velocity sections,
Due to partial melting, face crack may be generated.
It is then possible to include the step of heat treatment to made squeeze wood.
It, can be in 200 DEG C to 400 DEG C of temperature more specifically, in the step of being heat-treated to made squeeze wood
The squeeze wood is heat-treated under range.
More specifically, heat treatment 0.5 hour to 2 hours can be carried out to the squeeze wood.
By being heat-treated to prepared squeeze wood with the temperature range and the time, can alleviate above-mentioned
The Deformation structure generated in hot extrusion step and residual stress etc..Thus, it is possible to obtain relative to whole 100 body of microscopic structure
Product % has the magnesium alloy materials of the recrystallized structure more than or equal to 99 volume %.Therefore, the magnesium alloy materials is thermally conductive
Rate can be greater than or equal to 135W/mK.
It is described in detail below by embodiment.But following embodiments are only intended to illustrate the present invention, and the contents of the present invention are not
It is limited to following embodiments.
Embodiment
It is spare that alloy molten solution is casting continuously to form blank, relative to 100 weight % of total amount, the alloy molten solution includes 0.8 weight
Measure the Mn of % to 1.8 weight %, less than or equal to the Ca of 0.2 weight % (except 0%), the Mg of surplus and inevitably miscellaneous
Matter.
Then, homogenization heat treatment 16 hours is carried out to the blank at 400 DEG C.
Then, by the blank after the homogenization heat treatment with preheating temperature 4 hours of 430 DEG C.
Then, hot extrusion directly is carried out to the blank after the preheating using heat extruder.At this point, at 430 DEG C with
The speed of 15mpm carries out hot extrusion, to prepare squeeze wood.
Then, heat treatment 1 hour is carried out to the squeeze wood after extruding at 300 DEG C, finally obtains magnesium alloy materials.
Comparative example 1
Carrying out thin-belt casting rolling (strip casting) to magnesium alloy, to be made plate spare, relative to 100 weight % of total amount,
The magnesium alloy include 0.5% to 2.0% Mn, be less than or equal to 0.1% (except 0%) Al, 8ppm to 15ppm Be,
Less than or equal to the Ca of 0.2% (except 0%) and the Mg of surplus.
Then, homogenization heat treatment is being carried out to the plate under the same conditions with the embodiment of the present application.
Then, 150 DEG C to 300 DEG C at a temperature of to it is described homogenization heat treatment after plate carry out warm-rolling.
Comparative example 2
Prepare commercialization AZ31 magnesium alloy.
Comparative example 3
Prepare commercialization AZ61 magnesium alloy.
Comparative example 4
Prepare commercialization STS304 stainless steel.
Comparative example 5
It is spare that alloy molten solution is casting continuously to form blank, relative to 100 weight % of total amount, the alloy molten solution includes 0.8 weight
Measure the Mn of % to 1.8 weight %, the Mg and inevitable impurity of surplus.Compared with the embodiment, in addition to not including Ca
Except ingredient, the other compositions of alloy molten solution are identical with component.
Then, the step of homogenization heat treatment being carried out to the blank；Blank after the homogenization heat treatment is carried out
The step of preheating；The step of hot extrusion is pressed into squeeze wood is carried out to the blank after the preheating；And to described after extruding crowded
The step of pressure material is heat-treated is also to implement under the same conditions with the embodiment, to prepare magnesium alloy materials.
Experimental example: thermal conductivity comparative experiments
Then, experiment is compared to the thermal conductivity of the embodiment and comparative example 1 to 4 prepared.At this point, sample is processed
It is 10mm to 13mm at diameter, after the disc-shape with a thickness of 2.0mm to 3.0mm, thermal parameter measurement device is utilized at 25 DEG C
The thermal conductivity is determined, result is as shown in table 1 below.
[table 1]
| No. | Thermal conductivity (W/mK, 25 DEG C) |
| Embodiment | 138.51 |
| Comparative example 1 | 119.98 |
| Comparative example 2 | 86.92 |
| Comparative example 3 | 65.63 |
| Comparative example 4 | 18.75 |
The upper comparison of table 1 shows the embodiment of the present application and the commercial alloy i.e. thermal conductivity of comparative example 1 to 4.
As a result, the thermal conductivity of the embodiment of the present application is substantially better than comparative example 1 to 4.
More specifically, the comparative example 1 is passed through after carrying out thin-belt casting rolling to the alloy molten solution comprising Mn, Al, Be and Ca
The situation of magnesium alloy plate is made in warm-rolling.As shown in Table 1, the thermal conductivity of the embodiment of the present application is better than the comparative example 1, this can
It is explained with microscopic structure by the embodiment and comparative example 1.
The microscopic structure of the embodiment and comparative example 1 is shown in Fig. 2 of the application.
The microscopic structure that Fig. 2 shows the embodiments observed with optical microscopy based on heat treatment temperature after extruding and right
The microscopic structure based on heat treatment temperature after rolling of ratio 1.
More specifically, Fig. 2 is to the embodiment being crushed to and the comparative example 1 made of thin-belt casting rolling method
Change the picture of temperature observations microscopic structure under the heat treatment condition based on an exemplary implementation scheme of the invention.This
When, heat treatment is to implement 1 hour at each temperature.
As shown in Fig. 2 of this application, the comparative example 1 observes the shear band (shear much generated by plastic processing
Band), the Deformation structures such as twin crystal (twin) defect.Moreover, the comparative example 1 also accumulates caused by many accumulation pressures
Residual stress.
In contrast, the microscopic structure of the squeeze wood prepared by hot extrusion step of the embodiment of the present application (embodiment
As-extruded) in some recrystallized structures can be confirmed, just as by annealing as.Only, it further acknowledges some double
Crystalline substance tissue and secondary phase (black particles), but the score of Deformation structure also can be with the naked eye confirmed far less than the comparative example
1.Therefore, for the comparative example 1 prepared by thin-belt casting rolling and warm-rolling, though after rolling with the embodiment of the present application
Identical temperature and time carries out subsequent heat treatment, can also remain a large amount of Deformation structures.
On the other hand, for the embodiment of the present application, before implementing heat treatment, prepared squeeze wood (squeeze by embodiment
Press state) in the score of internal stress, Deformation structure and secondary phase etc. accumulated be considerably less than the score of whole microscopic structure, therefore
Implement subsequent heat treatment, will successfully start to restore and recrystallizes.As a result, relative to whole 100 volume % of microscopic structure,
The score of recrystallized structure is greater than or equal to 99 volume %.
Size of microcrystal it is possible to further confirm the embodiment of the present application is also relatively coarse.That is, the application is implemented
The factor that thermal conductivity is damaged in the microscopic structure of example is considerably less than the microscopic structure of the comparative example 1.
It is possible thereby to confirm, as shown in table 1, the thermal conductivity of the comparative example 1 is 120W/mK or so, and the application is implemented
The thermal conductivity of example is higher by the comparative example 1 about 20W/mK or so.The thermal conductivity of pure magnesium metal is 155W/mK or so, and commercial magnesium closes
The thermal conductivity of gold is 80W/mK or so, and the thermal conductivity of the embodiment of the present application is very excellent in contrast to this.
In this application, unnecessary alloying element is reduced, controls process conditions in the preparation step of magnesium alloy materials, from
And the microscopic structure that there's almost no the completion recrystallization of residual stress, secondary phase and Deformation structure etc. is obtained, result has
Feature as described above.More specifically, being formed relative to whole 100 volume % of microscopic structure more than or equal to 99 volume %'s
Recrystallized structure, result have feature as described above.
In addition, Fig. 3 of the application is by the embodiment of the present application and comparative example 5 by extruding whether addition based on Ca ingredient
The view that material surface characteristic compares.
Therefore, as shown in Fig. 3 of this application, for the embodiment of the present application comprising Ca ingredient, because containing the micro Ca
Ingredient, so that the ignition temperature of alloy rises, to can inhibit face crack in hot extrusion.It follows that having excellent
Surface shape.
In contrast, for the comparative example 5 without micro Ca, because ignition temperature is low, in hot extrusion, face crack is led
Mg alloy surface shape is caused to be deteriorated.Due to such reason, it is critically important in productivity level that micro Ca is added.
The embodiment of the present invention is illustrated above with reference to attached drawing, but those skilled in the art is appreciated that
In the case where not changing technical idea and essential feature, the present invention can be implemented with other specific embodiments.
Therefore, above-described embodiment is only exemplary not restrictive.Protection scope of the present invention should be with claim
Subject to book rather than above description, have altered or change as derived from the meaning, range and such equivalents of claims
Form each falls within protection scope of the present invention.
Symbol description
1: direct ram extruder
11: blank
12: squeeze wood
21: mold (Die, extrusion die)
22: mold base (Die Holder, extrusion die bracket)
31: extrusion cylinder
41: pressure head (Ram passes through the component of hydraulic moving)
Claims (18)
1. a kind of magnesium alloy materials, it is characterised in that:
Relative to 100 weight % of total amount, the magnesium alloy materials include the Mn of 0.8 weight % to 1.8 weight %, are less than or equal to
The Mg and inevitable impurity of the Ca of 0.2 weight % (except 0%), surplus,
Relative to the 100 volume % of whole microscopic structure of the magnesium alloy materials, the magnesium alloy materials, which have, to be greater than or equal to
The recrystallized structure of 99 volume %.
2. magnesium alloy materials according to claim 1, it is characterised in that:
The average crystal grain partial size of the magnesium alloy materials is 10 μm to 20 μm.
3. magnesium alloy materials according to claim 2, it is characterised in that:
The thermal conductivity of the magnesium alloy materials is greater than or equal to 135W/mK.
4. a kind of preparation method of magnesium alloy materials, which is characterized in that this method includes:
Alloy molten solution is casting continuously to form the spare step of blank, relative to 100 weight % of melt total amount, the alloy molten solution includes
The Mn of 0.8 weight % to 1.8 weight %, less than or equal to the Ca of 0.2 weight % (except 0%), the Mg of surplus and inevitable
Impurity；
The step of homogenization heat treatment is carried out to the blank；
The step of blank after the homogenization heat treatment is preheated；
The step of hot extrusion is pressed into squeeze wood is carried out to the blank after the preheating；And
The step of made squeeze wood is heat-treated.
5. the preparation method of magnesium alloy materials according to claim 4, it is characterised in that:
The step of being heat-treated to made squeeze wood is heat-treated under 200 DEG C to 400 DEG C of temperature range.
6. the preparation method of magnesium alloy materials according to claim 5, it is characterised in that:
In the step of being heat-treated to made squeeze wood,
Heat treatment carries out 0.5 hour to 2 hours.
7. the preparation method of magnesium alloy materials according to claim 4, it is characterised in that:
The step of hot extrusion is pressed into squeeze wood is carried out to the blank after the preheating, hot extrusion is carried out by direct fashion of extrusion.
8. the preparation method of magnesium alloy materials according to claim 7, it is characterised in that:
Carrying out the step of hot extrusion is pressed into squeeze wood to the blank after the preheating is under 350 DEG C to 550 DEG C of temperature range
Carry out hot extrusion.
9. the preparation method of magnesium alloy materials according to claim 8, it is characterised in that:
The step of hot extrusion is pressed into squeeze wood is carried out to the blank after the preheating, hot extrusion is carried out with the speed of 10mpm to 30mpm
Pressure.
10. the preparation method of magnesium alloy materials according to claim 4, it is characterised in that:
The step of preheating to the blank after the homogenization heat treatment is preheated in indirect heating type heating furnace.
11. the preparation method of magnesium alloy materials according to claim 10, it is characterised in that:
350 DEG C to 550 DEG C of temperature range is preheating in the step of preheating to the blank after the homogenization heat treatment.
12. the preparation method of magnesium alloy materials according to claim 4, it is characterised in that:
The step of carrying out homogenization heat treatment to the blank is that homogenization heat is carried out under 400 DEG C to 500 DEG C of temperature range
Processing.
13. the preparation method of magnesium alloy materials according to claim 12, it is characterised in that:
In the step of carrying out homogenization heat treatment to the blank,
Homogenization heat treatment carries out 10 hours to 16 hours.
14. the preparation method of magnesium alloy materials according to claim 4, it is characterised in that:
Alloy molten solution is casting continuously to form the spare step of blank, relative to 100 weight % of melt total amount, the alloy molten solution includes
The Mn of 0.8 weight % to 1.8 weight %, less than or equal to the Ca of 0.2 weight % (except 0%), the Mg of surplus and inevitable
Impurity；It is that continuous casting is carried out under 650 DEG C to 750 DEG C of temperature range.
15. the preparation method of magnesium alloy materials according to claim 14, it is characterised in that:
Alloy molten solution is casting continuously to form the spare step of blank, relative to 100 weight % of melt total amount, the alloy molten solution includes
The Mn of 0.8 weight % to 1.8 weight %, less than or equal to the Ca of 0.2 weight % (except 0%), the Mg of surplus and inevitable
Impurity；It is that continuous casting is carried out with the velocity interval of 50mm/min to 150mm/min.
16. the preparation method of the magnesium alloy materials according to any one of claim 4 to 15, it is characterised in that:
Relative to the 100 volume % of whole microscopic structure of the magnesium alloy materials, the magnesium alloy materials, which have, to be greater than or equal to
The recrystallized structure of 99 volume %.
17. the preparation method of the magnesium alloy materials according to any one of claim 4 to 15, it is characterised in that:
The average crystal grain partial size of the magnesium alloy materials is 10 μm to 20 μm.
18. the preparation method of the magnesium alloy materials according to any one of claim 4 to 15, it is characterised in that:
The thermal conductivity of the magnesium alloy materials is greater than or equal to 135W/mK.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160078726A KR101831385B1 (en) | 2016-06-23 | 2016-06-23 | Magnesium alloy material and method for manufacturing the same |
| KR10-2016-0078726 | 2016-06-23 | ||
| PCT/KR2017/006270 WO2017222240A1 (en) | 2016-06-23 | 2017-06-15 | Magnesium alloy material and manufacturing method therefor |
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| CN109328239A true CN109328239A (en) | 2019-02-12 |
| CN109328239B CN109328239B (en) | 2021-05-11 |
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| Country | Link |
|---|---|
| US (1) | US20190177819A1 (en) |
| EP (1) | EP3476959B1 (en) |
| JP (1) | JP6799618B2 (en) |
| KR (1) | KR101831385B1 (en) |
| CN (1) | CN109328239B (en) |
| WO (1) | WO2017222240A1 (en) |
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| KR102084304B1 (en) * | 2018-02-13 | 2020-03-04 | 서울대학교산학협력단 | Magnesium alloy having excellent strength and corrosion resistance and manufacturing method for the same |
| GB2607532B (en) | 2020-02-14 | 2024-01-10 | Cummins Inc | Apparatuses, methods, systems, and techniques of misfire detection using engine speed sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001355033A (en) * | 2000-06-12 | 2001-12-25 | Nakabohtec Corrosion Protecting Co Ltd | Magnesium alloy for sacrificial anode |
| CN101392343A (en) * | 2008-11-06 | 2009-03-25 | 上海交通大学 | Absorbable Mg-Mn-Ca ternary magnesium alloy material in organism |
| CN103038379A (en) * | 2010-05-24 | 2013-04-10 | 联邦科学与工业研究组织 | Magnesium-based alloy for wrought applications |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100519721B1 (en) * | 2003-03-26 | 2005-10-14 | 주식회사 다이너머트리얼스 | High strength magnesium alloy and its preparation method |
| KR101585089B1 (en) * | 2014-06-17 | 2016-01-22 | 한국생산기술연구원 | High ignition-resistance with high-strength magnesium alloy and method of manufacturing the same |
-
2016
- 2016-06-23 KR KR1020160078726A patent/KR101831385B1/en active IP Right Grant
-
2017
- 2017-06-15 EP EP17815653.5A patent/EP3476959B1/en active Active
- 2017-06-15 US US16/311,955 patent/US20190177819A1/en not_active Abandoned
- 2017-06-15 CN CN201780038553.8A patent/CN109328239B/en active Active
- 2017-06-15 JP JP2018566966A patent/JP6799618B2/en active Active
- 2017-06-15 WO PCT/KR2017/006270 patent/WO2017222240A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001355033A (en) * | 2000-06-12 | 2001-12-25 | Nakabohtec Corrosion Protecting Co Ltd | Magnesium alloy for sacrificial anode |
| CN101392343A (en) * | 2008-11-06 | 2009-03-25 | 上海交通大学 | Absorbable Mg-Mn-Ca ternary magnesium alloy material in organism |
| CN103038379A (en) * | 2010-05-24 | 2013-04-10 | 联邦科学与工业研究组织 | Magnesium-based alloy for wrought applications |
Non-Patent Citations (1)
| Title |
|---|
| N.STANFORD: ""The effect of calcium on the texture, microstructure and mechanical properties of extruded Mg-Mn-Ca alloys"", 《MATERIALS SCIENCE AND ENGINEERING》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019524988A (en) | 2019-09-05 |
| WO2017222240A8 (en) | 2018-02-08 |
| WO2017222240A1 (en) | 2017-12-28 |
| KR101831385B1 (en) | 2018-02-22 |
| US20190177819A1 (en) | 2019-06-13 |
| JP6799618B2 (en) | 2020-12-16 |
| KR20180000569A (en) | 2018-01-03 |
| CN109328239B (en) | 2021-05-11 |
| EP3476959A4 (en) | 2019-05-01 |
| EP3476959B1 (en) | 2020-12-16 |
| EP3476959A1 (en) | 2019-05-01 |
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