CN106676301A - Preparation method of collaborative alloying extruded magnesium alloy - Google Patents
Preparation method of collaborative alloying extruded magnesium alloy Download PDFInfo
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- CN106676301A CN106676301A CN201710138543.3A CN201710138543A CN106676301A CN 106676301 A CN106676301 A CN 106676301A CN 201710138543 A CN201710138543 A CN 201710138543A CN 106676301 A CN106676301 A CN 106676301A
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- alloy
- extrusion
- magnesium alloy
- magnesium
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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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—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
Abstract
The invention provides a preparation method of a collaborative alloying extruded magnesium alloy. Magnesium and zinc are used as substrates; and calcium elements and lanthanum-cerium mixed rare earth elements are added to cast a multi-element alloy; and then, the multi-element alloy is put in a high-temperature environment for uniform solid-solution treatment for a certain time, is quenched in warm water, is finally preheated at high temperature for hot extrusion, and is cooled at room temperature to finally obtain a magnesium alloy extruded rod with prominently improved mechanical performance. The subsequent experiment representation explains that the magnesium alloy extruded rod provided by the invention respectively reduces the grain size by 45.76% and 64.04%, respectively increases the tensile strength by 10.03% and 12.79% and reaches the ductility of 20.8% compared with a magnesium alloy extruded rod singly added with calcium elements or singly added with lanthanum-cerium mixed rare earth elements. The alloy is an extruded alloy little reported at present; and the preparation method is simple, controllable in components, low in cost and broad in application prospect.
Description
Technical field
The present invention relates to technical field of alloy, specifically, is related to a kind of preparation side of collaboration alloying extrusion magnesium alloy
Method.
Background technology
Since new century, with a large amount of discharges of mineral resources increasingly depleted and greenhouse gases, energy-saving and emission-reduction become full generation
The important topic on boundary.The lightweight of material can effectively reduce energy resource consumption, the war to realizing energy-conserving and environment-protective and sustainable development
Slightly target is significant.Magnesium alloy have higher specific strength, specific stiffness, relatively low density, machinability it is good and
The advantages of regeneration cycle is good, has a wide range of applications potentiality in aviation field and auto industry.But commercial magnesium various at present are closed
Gold is compared with aluminium alloy with traditional iron and steel, and its comprehensive mechanical property is slightly inferior, limits its larger range of application.Cause
This, the improvement of magnesium alloy mechanical property has attracted widely studied.
Alloying is to improve the effective ways of magnesium alloy mechanical property.Adding suitable alloy element in the magnesium alloy can
To reduce crystallite dimension, improve tissue, and then improve the mechanical property of magnesium alloy.Calcium, zinc, rare earth element are all conventional alloys
Change element.It is reported that, after the deformation processing of superhigh intensity magnesium gadolinium yttrium zinc zircaloy capital, its tensile strength can exceed 500MPa.So
And the higher price of gadolinium yttrium and addition, cause its high cost, be unsuitable for large-scale promotion application.Lanthanum cerium mischmetal is dilute as weight
Side-product in native separation process, by cheap price and good alloying action, in the magnesium alloy with larger potentiality.
The introducing of rare earth element can also make alloy surface form finer and close corrosion products film, can effectively alloy enters always
One step is corroded, and the raising to the decay resistance of alloy also has positive effect.Except alloying, the deformation processing of magnesium alloy is same
Sample is to the raising of mechanical property with fairly obvious effect.By substantial amounts of experiment, it has been found that collaboration in the magnesium alloy adds
Adduction alloying element, then carries out appropriate deformation processing, can effectively improve the mechanical property of magnesium alloy.
Herein, we have developed one kind simple, efficiently, the wrought magnesium alloy of low cost.By cooperateing with the magnesium alloy
Addition calcium constituent and mixed rare earth of lanthanum and cerium element, through a series of heat treatment and hot-working, have prepared mechanical property notable
Raising wrought magnesium alloy.The alloy grain is substantially refined, and shows good tensile mechanical performance.The method with into
This is low, and the features such as process is simple, the magnesium alloy of production has a wide range of applications latent in Aero-Space, automobile and electronics industry
Power.
The content of the invention
This patent proposes a kind of preparation method of collaboration alloying extrusion magnesium alloy, and the method is by assisting in the magnesium alloy
With addition calcium constituent and mixed rare earth of lanthanum and cerium element, through a series of heat treatment and hot-working, mechanical property is prepared and has shown
Write the wrought magnesium alloy for improving.The alloy grain is substantially refined, and shows good tensile mechanical performance.The method with into
This is low, and the features such as process is simple, the magnesium alloy of production has a wide range of applications latent in Aero-Space, automobile and electronics industry
Power.
A kind of preparation method of collaboration alloying extrusion magnesium alloy, it is characterised in that：With magnesium zinc as base material, by adding calcium
Element and lanthanum cerium mixed rear earth element, cast out multicomponent alloy, are subsequently placed in hot environment, carry out the homogenization of certain hour
Solution treatment, warm quenching-in water, final high temperature preheating carry out hot extrusion, and room temperature cooling finally gives mechanical property and significantly improves
Extruded bar from magnesium alloy.
A kind of preparation method of collaboration alloying extrusion magnesium alloy, the method specifically include following steps：
(1) melting of cast alloy：In protective gas atmosphere, pure magnesium, pure zinc are placed in into resistance furnace, heating is melted, with
Add calcium source (magnesium calcium intermediate alloy) and mixed rare earth of lanthanum and cerium afterwards, skim after melting, it is to be mixed uniform, mould is poured into, is cooled down
To alloy cast ingot；
(2) solution treatment of ingot casting：The alloy cast ingot that step (1) is obtained is put into into metal heat treatmet resistance furnace, in high temperature
The homogenization heat treatment of certain hour in environment, is carried out, quenching-in water is subsequently carried out, is obtained single supersaturated solid solution；
(3) high warm extrusion：The solid solution alloy that step (2) is obtained is put into into hot environment, held for some time, with laggard
Row hot extrusion is processed, and obtains extruded barses.
3. the protective gas described in step (1) is the mixed gas of sulfur hexafluoride and carbon dioxide, and mixed proportion is 40:1
~30:1, heating-up temperature is 720 DEG C~730 DEG C.
Preferably, the mixed proportion of the protective gas described in step (1) is 40:1, heating-up temperature is 720 DEG C.
4. the mass ratio of the intermediate alloy magnesium calcium constituent described in step (1) is 50:50, the ratio of mischmetal is 1:1.
5. the heat treatment temperature described in step (2) is 385 DEG C, and the time is 8h~24h, the secondary deionization of water used by quenching
Water, water temperature are 65 DEG C~75 DEG C.
Preferably, the heat treatment time described in step (2) is 8h, and water temperature used by quenching is 70 DEG C.
6. the high ambient temperatures described in step (3) are 200 DEG C~220 DEG C, and temperature retention time is 0.5h~1h.
7. the hot extrusion described in step (3) is processed, and extruding condition is：Extrusion ratio is 20, and extruding rate is 1~2mms-1。
Preferably, the hot extrusion speed described in step (3) is 1mms-1。
8. the collaboration alloying extrusion magnesium alloy prepared by the present invention, tensile strength reach 301MPa, and elongation percentage reaches
20.8%, with excellent comprehensive mechanical property, have a wide range of applications in Aero-Space, automobile and electronics industry latent
Power.The features such as method that the present invention is adopted has low cost, process is simple.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be in embodiment or description of the prior art
The required accompanying drawing for using does simple introduction.Drawings in the following description are only embodiments of the invention, and related personnel is come
Say, on the premise of not paying creative work, other accompanying drawings can be obtained according to the accompanying drawing for providing.
Fig. 1 is the extrusion die schematic diagram used by the embodiment of the present invention.
Fig. 2 a are 1000 times of field emission microscope pictures of collaboration alloying extrusion magnesium alloy, and Fig. 2 b are that calcium constituent is closed
1000 times of field emission microscope pictures of aurification extrusion magnesium alloy, Fig. 2 c are the element alloyed extruding magnesium of mixed rare earth of lanthanum and cerium
1000 times of field emission microscope pictures of alloy.
Fig. 3 is calcium or the single alloying extrusion magnesium alloy of lanthanum cerium, the stress-strain diagram of collaboration alloying extrusion magnesium alloy.
Specific embodiment
With reference to the accompanying drawing in present example, the technical scheme in the embodiment of the present invention is described in detail.With
Under the content be basic explanation under present inventive concept, and according to any equivalent transformation for being done of the present invention, this all should be belonged to
The protection domain of invention.
A kind of sign of the preparation method of the collaboration alloying extrusion magnesium alloy in the present invention is aobvious using field emission electron
Micro mirror (Hitachi S-4800, Japan) observation alloy microstructure mechanical stretch testing machine (Instron 5869,
America) obtain alloy should be with strain curve.Data value is the meansigma methodss of measurement data at 3 samples.
Embodiment 1：
(1) melting of cast alloy：It is 40 in the mixed proportion of sulfur hexafluoride and carbon dioxide:1 protective gas atmosphere
In, 9.25kg pure magnesium, the pure zinc of 0.6kg are placed in into resistance furnace, 0.1kg magnesium calcium intermediate alloys are subsequently added in 720 DEG C of heating meltings,
Magnesium calcium mass ratio is 1:1, and 0.05 mixed rare earth of lanthanum and cerium, lanthanum cerium mass ratio is 1:1, skim after melting, it is to be mixed uniform, pour into
45# steel permanent molds, cooling obtain alloy cast ingot；
(2) solution treatment of ingot casting：The alloy cast ingot that step (1) is obtained is put into into metal heat treatmet resistance furnace, at 385 DEG C
In, the homogenization heat treatment of 8h is carried out, 70 DEG C of quenching-in waters is subsequently carried out, is obtained single supersaturated solid solution；
(3) high warm extrusion：Solid solution alloy that step (2) is obtained, extrusion die are preheated in being put into 200 DEG C of environment, are protected
Warm 0.5h, subsequently carries out hot extrusion, and it is 20 to pressurize than extrusion ratio, and extruding rate is 1mms-1, that is, described collaboration alloy is obtained
Change extrusion magnesium alloy.Fig. 2 a are 1000 times of field emission microscope pictures for cooperateing with alloying extrusion magnesium alloy, and Fig. 2 b are calcium
1000 times of field emission microscope pictures of element alloyed extrusion magnesium alloy, Fig. 2 c are that mixed rare earth of lanthanum and cerium is element alloyed
1000 times of field emission microscope pictures of extrusion magnesium alloy.By statistical computation, the crystalline substance of alloying extrusion magnesium alloy is cooperateed with
Particle size is 3.2um, is substantially reduced.
Embodiment 2：
(1) melting of cast alloy：It is 40 in the mixed proportion of sulfur hexafluoride and carbon dioxide:1 protective gas atmosphere
In, 9.25kg pure magnesium, the pure zinc of 0.6kg are placed in into resistance furnace, 0.1kg magnesium calcium intermediate alloys are subsequently added in 720 DEG C of heating meltings,
Magnesium calcium mass ratio is 1:1, and 0.05 mixed rare earth of lanthanum and cerium, lanthanum cerium mass ratio is 1:1, skim after melting, it is to be mixed uniform, pour into
45# steel permanent molds, cooling obtain alloy cast ingot；
(2) solution treatment of ingot casting：The alloy cast ingot that step (1) is obtained is put into into metal heat treatmet resistance furnace, at 385 DEG C
In, the homogenization heat treatment of 24h is carried out, 70 DEG C of quenching-in waters is subsequently carried out, is obtained single supersaturated solid solution；
(3) high warm extrusion：Solid solution alloy that step (2) is obtained, extrusion die are preheated in being put into 200 DEG C of environment, are protected
Warm 1h, subsequently carries out hot extrusion, and it is 20 to pressurize than extrusion ratio, and extruding rate is 1.5mms-1, that is, described collaboration alloy is obtained
Change extrusion magnesium alloy.Fig. 3 is calcium or the single alloying extrusion magnesium alloy of lanthanum cerium, the ess-strain of collaboration alloying extrusion magnesium alloy
Curve.The fracture strength of collaboration alloying extrusion magnesium alloy reaches 301MPa, and elongation percentage reaches 20.8%, in three kinds of alloys, power
Learn performance optimal.Cooperate with the mechanical property of alloying extrusion magnesium alloy essentially identical with embodiment 1 obtained by embodiment 2.
Claims (7)
1. it is a kind of collaboration alloying extrusion magnesium alloy preparation method, it is characterised in that：With magnesium zinc as base material, by adding calcium unit
Element and lanthanum cerium mixed rear earth element, cast out multicomponent alloy, are subsequently placed in hot environment, and the homogenization for carrying out certain hour is solid
Molten process, warm quenching-in water, final high temperature preheating carry out hot extrusion, and room temperature cooling finally gives what mechanical property was significantly improved
Extruded bar from magnesium alloy.
2. it is according to claim 1 collaboration alloying extrusion magnesium alloy preparation method, it is characterised in that the method is concrete
Comprise the following steps：
(1) melting of cast alloy：In protective gas atmosphere, pure magnesium, pure zinc are placed in into resistance furnace, heating melting subsequently adds
Plus calcium constituent and mixed rare earth of lanthanum and cerium element, skim after melting, it is to be mixed uniform, mould is poured into, cooling obtains alloy cast ingot；
(2) solution treatment of ingot casting：The alloy cast ingot that step (1) is obtained is put into into metal heat treatmet resistance furnace, in hot environment
In, the homogenization heat treatment of certain hour is carried out, quenching-in water is subsequently carried out, is obtained single supersaturated solid solution；
(3) high warm extrusion：The solid solution alloy that step (2) is obtained is put into into hot environment, held for some time subsequently carries out heat
Extrusion process, obtains extruded barses.
3. it is according to claim 2 collaboration alloying extrusion magnesium alloy preparation method, it is characterised in that its feature exists
In the protective gas described in step (1) is the mixed gas of sulfur hexafluoride and carbon dioxide, and mixed proportion is 40:1~30:1,
Heating-up temperature is 720 DEG C~730 DEG C.
4. it is according to claim 2 collaboration alloying extrusion magnesium alloy preparation method, it is characterised in that step (1) institute
The calcium constituent stated derives from magnesium calcium intermediate alloy, and the mass ratio of intermediate alloy magnesium calcium is 50:50, the ratio of mischmetal is 1:1.
5. it is according to claim 2 to cooperate with alloying extrusion magnesium alloy preparation method, it is characterised in that step (2) is described
Heat treatment temperature be 385 DEG C, the time be 8h~24h, quenching used by water secondary deionized water, water temperature be 65 DEG C~75 DEG C.
6. it is according to claim 2 collaboration alloyed magnesium alloy preparation method, it is characterised in that described in step (3)
High ambient temperatures are 200 DEG C~250 degrees Celsius DEG C, and temperature retention time is 0.5h~1h.
7. it is according to claim 2 to cooperate with alloying extrusion magnesium alloy and preparation method thereof, it is characterised in that step (3)
Described hot extrusion is processed, and extruding condition is：Extrusion ratio is 20, and extruding rate is 1~2mms-1。
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| CN201710138543.3A CN106676301A (en) | 2017-03-09 | 2017-03-09 | Preparation method of collaborative alloying extruded magnesium alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107335706A (en) * | 2017-08-08 | 2017-11-10 | 肥西县通力机械有限公司 | A kind of method for improving magnesium alloy plate hot stamping crystallized ability |
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2017
- 2017-03-09 CN CN201710138543.3A patent/CN106676301A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107335706A (en) * | 2017-08-08 | 2017-11-10 | 肥西县通力机械有限公司 | A kind of method for improving magnesium alloy plate hot stamping crystallized ability |
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