CN106929724A - AQ80M magnesium alloy Wide and Thick Slab hot extrusion techniques - Google Patents
AQ80M magnesium alloy Wide and Thick Slab hot extrusion techniques Download PDFInfo
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- CN106929724A CN106929724A CN201710180000.8A CN201710180000A CN106929724A CN 106929724 A CN106929724 A CN 106929724A CN 201710180000 A CN201710180000 A CN 201710180000A CN 106929724 A CN106929724 A CN 106929724A
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- wide
- thick slab
- magnesium alloy
- extruding
- blank
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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
-
- 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 present invention relates to the extruding Wide and Thick Slab deformation technique of the major diameter ingot blank of AQ80M magnesium alloys.The quality percentage composition of alloy is：Al 7.5 9.0%, Ag 0.02 0.8%, Zn 0.35 0.55%, Mn 0.05 0.20%, RE 0.01 0.10%, Ca 0.001 0.002%, Fe≤0.02%, Si≤0.05%, Cu≤0.02%, Ni≤0.001%.The present invention first removes the peel the turning of magnesium alloy semi-continuous casting blank, Homogenization Treatments, heats mould, and heating alloy blank is to 340 DEG C 420 DEG C and is incubated 1 3h extruding, and sheet material specification is after extruding：400 450mm wide, thick 30 35mm, length are more than 10m.Isothermal aging after extruding, Testing Tensile Strength at Elevated Temperature >=240MPa, yield strength >=195MPa, elongation percentage >=27%.
Description
Technical field
The present invention relates to magnesium alloy Wide and Thick Slab hot extrusion technique field, more particularly to AQ80 magnesium alloy extrusions Wide and Thick Slab into
Shape field.
Background technology
Magnesium alloy is a kind of novel structural metallic materials, with low-density, high specific strength, thermal conductivity be good, cushioning ability
By force, it is quick in automobile, electronic communication, Aero-Space and national defense and military isodensity the advantages of Cutting free, recyclable and dimensionally stable
Perceptual field has extremely important application value and wide application prospect.With energy resource consumption and stricter car tail
The appearance of gas discharge standard, auto industry is more urgent to that can meet the sheet material demand of its requirement；And Aero-Space etc. are to loss of weight
The field for having special demands is for a long time then the application target of magnesium alloy.
Excellent performance under the conditions of the tradition trade mark alloy at normal temperature such as Mg-Al systems alloy, such as AZ91, AZ80, using more.But by
There was only 437 DEG C, when being on active service under the high temperature conditions in alloy main phases precipitated fusing point, discontinuous recipittaion phase can be generated in alloy,
Because such precipitation is along with crystal boundary migration, therefore alloy creep and TRANSIENT HIGH TEMPERATURE mechanical property are poor.Meanwhile, the alloy is another kind of
Precipitated phase is smaller in the sparse, size of transgranular distribution, and the situation almost without precipitated phase in crystal grain did not occurred at that time for Ageing Treatment.With
It is that alloy high-temp performance is substantially relatively low that upper reason superposition causes this.But experiment shows, after addition Ag, alloy structure has substantially change
Change, high-temperature behavior lifting is obvious.
The present invention uses extrusion forming, and farthest being played material by three-dimensional compressive stress using material when deforming is moulded
Property.Extrusion process used for forming can effective refining alloy crystal grain, material mechanical performance is greatly improved.Meanwhile, large extrusion ratio
Under the conditions of, material easily forms strong plate texture, so as to improve the horizontal and vertical intensity of stripper plate.But can be produced due to lacking
The complete basis facility and stable application of large scale ingot casting, the development of large scale wrought magnesium alloy plate material is still in experimental study
Stage.Therefore, a kind of extrusion process that the generous sheet material of middle strength magnesium alloys is produced by semicontinuous ingot casting is researched and developed, no
But the demand of future automobile magnesium plate can be met, moreover it is possible to meet the field centering big specification of strength magnesium alloys such as state aviation space flight
The need for sheet material, have great importance.
The content of the invention
Present invention aim at the hot extrusion deformation technique of offer strong magnesium alloy Wide and Thick Slab in a kind of.Squeezed by adjusting ingot blank
The parameter such as pressure temperature, extrusion die temperature, extrusion speed and extrusion ratio, seek it is a kind of it is new in powerful diameter magnesium alloy plate
Extrusion deformation process, through finished heat treatment after, make the high temperature of magnesium alloy plate（150℃）Tensile strength >=240MPa, surrender is strong
Degree >=195MPa, elongation percentage >=27%.
Strong magnesium alloy AQ80M, is made up of following components in the present invention（wt.%）：Al 7.5-9.0%, Ag 0.02-0.8%,
Zn 0.35-0.55%、 Mn 0.05-0.20%、 RE 0.01-0.10%、 Ca 0.001-0.002%、 Fe≤0.02%、 Si≤
0.05%th, Cu≤0.02%, Ni≤0.001%, impurity≤0.10%, Mg surpluses.
The present invention includes step in detail below：
（1）Using Large Copacity smelting furnace fused raw material, peeling is machined after semi-continuous casting, obtain diameter 570-580mm ingot blanks.
（2）To reduce or eliminate non-equilibrium eutecticum phase, while avoiding alloy burning, carrying out two-step homogenization to ingot casting moves back
Fire, 250-300 DEG C of annealing temperature, annealing time 10-20h then raises temperature to 380-410 DEG C, is incubated 20-30h, after the completion of it is quick
Cooling, prevents ingot blank from the precipitation of the second phase occurring in cooling procedure.
（3）Heating extrusion die and recipient, its temperature is 340 DEG C -420 DEG C, and grinding tool is easily caused if temperature is too low
Temperature is relatively low during subsequent extrusion, increases extrusion process flow stress, situations such as cause press extruding force not enough；If temperature
It is too high, then cause ingot blank in extrusion process because heat accumulation occurs the perils such as ingot blank thawing.
（4）By by the magnesium alloy blank of Homogenization Treatments, 1-3h is incubated at a temperature of 340 DEG C -420 DEG C.Holding temperature
Should be higher than that alloy substantially produces 340 DEG C of the temperature of precipitated phase, while less than 437 DEG C of the melt temperature of alloy main phases precipitated, it is preceding
Person can improve the efficiency recrystallized during alloy deformation, and the latter can then prevent from locally failing the eutectic phase of dissolving in guarantor in alloy
Melt when warm, cause burning.
（5）The sufficient ingot blank of insulation is moved to and extruded in 10000T horizontal extruder recipients, extrusion ratio is 20-
25, sheet material specification is after extruding：Width 400-450mm, thickness 30-35mm, length are more than 10m.
（6）Magnesium alloy rod is cooled down after 380-410 DEG C of solution treatment 1-3h after extruding, during by 150-200 DEG C of isothermal
Effect treatment 20-40h.The low crystal boundary of solid solubility temperature easily goes out precipitated phase, and too high, crystal grain is grown up seriously.When aging temp is too low, peak is reached
The time of value timeliness can substantially increase, and cost is raised in actual production process；When selection temperature is too high, then during alloys peak timeliness
Due to precipitate volume fraction reduction, the intensity decreases of the reason alloy such as precipitation hardened decreased effectiveness.
The magnesium alloy blank is magnesium alloy semi-continuous casting blank, and specification is Ф 610mm, and length is more than 2000mm.
When the ingot blank specification of the 3rd described step is Ф 570-580mm, extruded on 10000T horizontal (double action) oil hydraulics.
The mould of the 3rd step, recipient and blank temperature are 360-400 DEG C, extruded velocity 6-10mm/s.
The extruding Wide and Thick Slab of the 4th described step is in 390-400 DEG C of insulation.
The extruding Wide and Thick Slab of the 5th described step carries out isothermal aging heat treatment 24-36h at 160-180 DEG C.
The mechanical property of Alloy Extrusion Product is determined by alloying component, crystallite dimension, texture intensity and precipitated phase.This patent
The addition of AQ80M magnesium alloys Ag used has obvious effect to improving alloy high-temp mechanical property；Crimp can simultaneously realize crystalline substance
Grain refinement and texture strengthening；The addition of Ag promotes Second Phase Precipitation, especially continuous precipitated phase.Rational extrusion process could be real
The crystal grain refinement of existing alloy, simultaneously, regulation squeezing parameter can realize entering outside refined crystalline strengthening using texture as far as possible
One step is strengthened.
The method have the characteristics that：Major diameter ingot casting is extruded, and extrusion ratio is larger, and choosing in temperature range, alloy can be
Fully recrystallized in deformation process, so as to realize refined crystalline strengthening；Temperature in ingot blank deformation process is conducive to closing with velocity composition
Golden texture strengthening；Subsequent heat treatment makes full use of second-phase strength.The combination of three of the above schedule of reinforcement, in addition this alloy Ag add
Plus caused solution strengthening, it is of the invention to make full use of all kinds of schedule of reinforcements of alloy to realize significantly improving for alloy high-temp intensity.
Brief description of the drawings
Fig. 1 is the horizontal and vertical sectional view of Wide and Thick Slab after shaping.
The present invention has done lots of comparing experiments by adjusting above-mentioned parameter.With reference to the accompanying drawings and examples to the present invention
Further illustrate.These embodiments are for illustrating the present invention, rather than limitation of the present invention, under the premise of present inventive concept
Present invention process is improved, the scope of protection of present invention is belonged to.
Specific embodiment
Embodiment 1
Ingot casting is by high capacity oven fused raw material in the present embodiment, through semi-continuous casting, turning remove the peel composition is Mg-9Al-
The ingot casting of 0.2Ag-0.3Zn-0.1Mn-0.1RE-0.001Ca, specification is Φ 580mm, length 1500mm.250℃/10h+410
DEG C/Homogenization Treatments of 30h after cool down.Heating extrusion die and recipient to its temperature are respectively 380 DEG C and 420 DEG C, by magnesium
Alloy blank is put into recipient after being heated to 380 DEG C of insulation 1h, is extruded on 10000T horizontal (double action) oil hydraulics.Extrusion ratio is
20；Product extrusion speed 12mm/s.Product size is:Width 430mm, thickness 33mm, length are more than 10m.Extruding Wide and Thick Slab warp
Mechanical experimental results are shown in Table 1 after being incubated 30h aging strengthening models after 175 DEG C through 410 DEG C of solid solution 1h.
Embodiment 2
Ingot casting is by high capacity oven fused raw material in the present embodiment, through semi-continuous casting, turning remove the peel composition is Mg-8.5Al-
The ingot casting of 0.7Ag-0.4Zn-0.1Mn-0.1RE-0.001Ca, specification is Φ 580mm, length 1500mm.250℃/20h+410
DEG C/Homogenization Treatments of 36h after cool down.Heating extrusion die and recipient to its temperature are respectively 340 DEG C and 380 DEG C, by magnesium
Alloy blank is put into recipient after being heated to 420 DEG C of insulation 1h, is extruded on 10000T horizontal (double action) oil hydraulics.Extrusion ratio is
25；Product extrusion speed 4mm/s.Product size：Width 450mm, thickness 35mm, length are more than 10m.Extruding Wide and Thick Slab is through warp
Mechanical experimental results are shown in Table 1 after 400 DEG C of solid solution 2h are incubated 40h aging strengthening models after 150 DEG C.
Embodiment 3
Ingot casting is by high capacity oven fused raw material in the present embodiment, through semi-continuous casting, turning remove the peel composition is Mg-8Al-
The ingot casting of 0.8Ag-0.4Zn-0.1Mn-0.1RE-0.001Ca, specification is Φ 580mm, length 1500mm.250℃/10h+410
DEG C/Homogenization Treatments of 30h after cool down.Heating extrusion die and recipient to its temperature are respectively 420 DEG C and 340 DEG C, by magnesium
Alloy blank is put into recipient after being heated to 340 DEG C of insulation 1h, is extruded on 10000T horizontal (double action) oil hydraulics.Extrusion ratio is
23；Product extrusion speed 7mm/s.Product size:Width 400mm, thickness 30mm, length are more than 10m.Extruding Wide and Thick Slab is through 380
Mechanical experimental results are shown in Table 1 after DEG C solid solution 3h is incubated 20h aging strengthening models after 200 DEG C.
| Embodiment | Tensile strength/(MPa) | Yield strength/(MPa) | Elongation/(%) |
| Embodiment 1 | 248 | 203 | 27 |
| Embodiment 2 | 240 | 198 | 32 |
| Embodiment 3 | 245 | 196 | 30 |
Claims (6)
1. a kind of extrusion process of AQ80M magnesium alloys Wide and Thick Slab, quality of magnesium alloy percent composition is：Al 7.5-9.0%, Ag
0.02-0.8%、Zn 0.35-0.55%、 Mn 0.05-0.20%、 RE 0.01-0.10%、 Ca 0.001-0.002%、 Fe≤
0.02%th, Si≤0.05%, Cu≤0.02%, Ni≤0.001%, remaining is Mg and not removable impurity element, it is characterised in that
Comprise the following steps：
A. magnesium alloy blank is carried out into turning peeling, is cooled down after two-step homogenization treatment；
B. extrusion die and recipient are heated, its temperature is maintained at 340 DEG C -420 DEG C；
C. extrusion die and recipient are heated, its temperature is maintained at 340 DEG C -420 DEG C, blank is at a temperature of 340 DEG C -420 DEG C
Extruded on 10000 tons of Horizontal type hydraulic extruders after insulation 1-3h, extrusion ratio is 20-25, extruded velocity 4-12mm/s, is squeezed
Press generous board size：400-450mm wide, thick 30-35mm, length are more than 10m；
D. extruding Wide and Thick Slab is cooled down after being incubated 1-3h at 380-410 DEG C；
E. the isothermal aging that enters to pass through to extruding Wide and Thick Slab is heat-treated, and technique is 150-200 DEG C of insulation 20-40h.
2. AQ80M magnesium alloys Wide and Thick Slab hot extrusion technique according to claim 1, it is characterised in that：The magnesium alloy base
Expect to be magnesium alloy semi-continuous casting blank, specification is Ф 610mm, length is more than 2000mm.
3. AQ80M magnesium alloys Wide and Thick Slab hot extrusion technique according to claim 1, it is characterised in that：The ingot blank rule of step c
When lattice are Ф 570-580mm, extruded on 10000T horizontal (double action) oil hydraulics.
4. the extrusion process of AQ80M magnesium alloys Wide and Thick Slab according to claim 1, it is characterised in that：The mould of step c,
Recipient and blank temperature are 360-400 DEG C, extruded velocity 6-10mm/s.
5. according to claim 1 in major diameter AQ80M magnesium alloy rod hot extrusion techniques, it is characterised in that：Step d
Extruding Wide and Thick Slab is in 390-400 DEG C of insulation.
6. according to claim 1 in AQ80M magnesium alloy Wide and Thick Slab hot extrusion techniques, it is characterised in that：The extruding of step e
Wide and Thick Slab carries out isothermal aging heat treatment 24-36h at 160-180 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710180000.8A CN106929724B (en) | 2017-03-23 | 2017-03-23 | AQ80M magnesium alloy Wide and Thick Slab hot extrusion techniques |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710180000.8A CN106929724B (en) | 2017-03-23 | 2017-03-23 | AQ80M magnesium alloy Wide and Thick Slab hot extrusion techniques |
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| CN106929724A true CN106929724A (en) | 2017-07-07 |
| CN106929724B CN106929724B (en) | 2018-08-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108441731A (en) * | 2018-07-07 | 2018-08-24 | 中南大学 | One kind having superplastic coarse-grain magnesium alloy plate and preparation method thereof |
| CN109022975A (en) * | 2018-09-09 | 2018-12-18 | 中南大学 | A method of improving AQ80M magnesium alloy strength and strain fatigue life |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101905251A (en) * | 2010-07-07 | 2010-12-08 | 中南大学 | Extrusion deforming process of high-strength large-diameter magnesium alloy rod |
| CN101914712A (en) * | 2010-07-07 | 2010-12-15 | 中南大学 | Extrusion deformation process of high-strength magnesium alloy thick plate |
| CN103290292A (en) * | 2013-06-24 | 2013-09-11 | 东北大学 | High strength magnesium alloy and preparation method thereof |
| CN103774014A (en) * | 2014-01-18 | 2014-05-07 | 中南大学 | Process for forming medium-strength heat-resistant magnesium alloy thick plate |
-
2017
- 2017-03-23 CN CN201710180000.8A patent/CN106929724B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101905251A (en) * | 2010-07-07 | 2010-12-08 | 中南大学 | Extrusion deforming process of high-strength large-diameter magnesium alloy rod |
| CN101914712A (en) * | 2010-07-07 | 2010-12-15 | 中南大学 | Extrusion deformation process of high-strength magnesium alloy thick plate |
| CN103290292A (en) * | 2013-06-24 | 2013-09-11 | 东北大学 | High strength magnesium alloy and preparation method thereof |
| CN103774014A (en) * | 2014-01-18 | 2014-05-07 | 中南大学 | Process for forming medium-strength heat-resistant magnesium alloy thick plate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108441731A (en) * | 2018-07-07 | 2018-08-24 | 中南大学 | One kind having superplastic coarse-grain magnesium alloy plate and preparation method thereof |
| CN109022975A (en) * | 2018-09-09 | 2018-12-18 | 中南大学 | A method of improving AQ80M magnesium alloy strength and strain fatigue life |
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| Publication number | Publication date |
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| CN106929724B (en) | 2018-08-14 |
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