CN105349861B - It is a kind of can quick roll forming magnesium sheet metal and its milling method - Google Patents
It is a kind of can quick roll forming magnesium sheet metal and its milling method Download PDFInfo
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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
- C22C23/04—Alloys based on magnesium with zinc or cadmium as the next major constituent
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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
- C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent
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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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Abstract
It is a kind of can quick roll forming magnesium sheet metal and its milling method, belong to metal material manufacturing technology.Zn, Er are used as main alloying elements for selection, and its addition is respectively 0~5.0wt.%Zn, and 0~1.0wt.%Er, Zn and Er mass percent sum are not less than 0.5% and do not exceed 5.0%, its balance of Mg.High temperature rolling temperature range is 350~500 DEG C, and every time deflection is 25~35%；Zerolling temperature range is 250~350 DEG C, and not comprising 350 DEG C, 10~25%, high temperature rolling and the accumulative deflection of zerolling are not less than 80% to every time deflection.Plate surface and the smooth of the edge, without cracking, be it is a kind of can speed rolling shape sheet material soon metal material.
Description
Technical field
The present invention relates to magnesium alloy plate rolling forming technology, belong to metal material manufacturing technology, specially a kind of magnesium
The manufacturing process of sheet metal.
Background technology
Magnesium alloy as a kind of new light metal application material, with specific strength it is high, proportion is small, high-damping, high heat conduction with
And damping property it is good, the advantages of be easily recycled.Therefore, magnesium alloy is obtained at aspects such as Aero-Space, automobile, 3C Products in recent years
Widely apply, most promising lightweight metal material is known as in the industry.However, magnesium is cubic close packed structure, it is in temperature
Processing characteristics is not good in the case that degree is relatively low, and this prepares to its sheet material and causes very big difficulty.But go out into as metal material
A kind of very important intermetallic composite coating product in shape product, sheet material is a kind of important supply of intermediate products, and its application can
The technological process in magnesium metal material deep processing is greatly simplified, simplifies complicated technology, so as to reduce manufacturing cost, model is applied in expansion
Enclose.
A kind of quality of the plastic working ability of alloy is closely related with alloying component.According to alloying component to alloy plasticity
The influence of working ability, casting, extruding, rolling and wrought magnesium alloy product are divided into by alloy.Although extruding, rolling and forging are equal
It is the deformation processing technique of magnesium metal, but its machining deformation mechanism has relatively big difference.The only extrusion process of some alloys, some conjunctions
Gold can not roll processing, and such as common AZ31 alloys are a kind of common extruding alloying component, and ZK60 is a kind of common squeezing
Pressure alloying component.Domestic common extrusion magnesium alloy is mainly MB1, MB5 etc., and the alloy that can be used in plate rolling processing is main
It is MB3, MB8 and MB22 etc..Generally speaking, the species of trade mark deformed Mg metal material is less, and sheet deformation magnesium metal material
It is then less.From from the aspect of design of material, the content of thick second phase is more few in alloy more is beneficial to the processing of magnesium sheet metal, no
Then cause cracking of the alloy in the operation of rolling.
Zn is a kind of common alloy element, and it can significantly improve the mobility and intensity of alloy.At present on containing
The magnesium metal species of Zn are more, concentrate on too much at present in Mg-Zn-RE (Zr), Mg-RE-Zn (Zr) alloy system, and RE is dilute
Earth elements are referred to as.More Mg-Zn-Y or Mg-Y-Zn alloys are such as studied at present, and I (quasi-crystalline substance)-phase is contained in such alloy
Or W-phase or LPSO (accumulation of long period fault)-more prominent phase of equal three class.This kind of nascent second mutually maximum feature be exactly
Size is excessively thick, skewness, and is difficult heat treatment, and this directly results in the Cracking Failure in alloy rolling processing, for
The extruded product of this kind of such alloy of feature is more, which has limited its aspects such as automobile, Aero-Space commercial applications.
Therefore, obtain can roll processing alloying component it is most important.Effectively can be used to be rolled into currently as one kind
The magnesium metal ingredient of shape.Existing alloy containing Zn is difficult to disappear in addition to molten ternary phase except containing above-mentioned three kinds thick, and another is special
Point is exactly Zn, RE (rare earth) content high, and Zn contents are high to cause hot tearing in alloy processing, and RE contents are high to cause cost of alloy too high.
Rational alloying component is selected, that is, avoids alloy from causing performance relatively low because alloying ingredients are relatively low, alloy is avoided again because of Zn contents
Higher and processing characteristics deviation.Therefore the addition of Zn and RE is selected, being that exploitation is a kind of rolls the pass for shaping magnesium metal
Key.And, the rolling temperature interval of Mg-Zn-RE magnesium alloys is small, it is more difficult to control, qualified yield rate reduction, therefore research is obtained
The rolling condition of Mg-Zn-RE magnesium alloys seems most important.
In view of magnesium metallic crystalline structure feature, therefore using low temperature, two-forty, the fast speed rolling work of single pass heavy deformation high
Skill is difficult to obtain high-quality magnesium sheet metal.So, under in terms of magnesium sheet metal produces preparation mainly using hot conditions
Hot rolling treatment, more a height of 350~500 DEG C of general hot-rolled temperature, it is 5~10% that single pass heavy deformation is smaller, processing conditions in this
Cause the processing efficiency of magnesium metal relatively low, it is impossible to reach the purpose of rapid processing shaping, therefore urgently exploitation one kind can quickly roll
It is made the metal rolled technique of magnesium of shape.
Further, since the close-packed hexagonal structure of magnesium metal, also wide-thin sheet material processing difficulties are asked in process
Topic.Therefore, in the operation of rolling, in addition to considering rolling temperature, speed and single pass heavy deformation etc., the operation of rolling is also coordinated
In burning optimization on line problem, that is, the working plasticity of metal is improved using heat treatment technics, obtain that crystal grain is tiny, tissue is equal
The obvious sheet material pretreatment product of even, anisotropy, therefore consider the processing request and dimensions of sample, in the operation of rolling
Burning optimization on line to sample is particularly important.However, being almost not involved with this respect in the metal rolled technique of magnesium at present
Content.
Be related in the present invention it is a kind of newly can quick roll forming Mg-Zn-Er sheet alloys and preparation method thereof, it is constituted
And mass percent is 0~5.0wt.%Zn, 0~1.0wt.%Er, Zn and Er mass percent sum are not less than 0.5% and not
Exceed 5.0%, its balance of Mg.The alloying component is clearly distinguishable from the Mg-Zn-RE (RE=containing I phases, W phases of current report
The rare earth elements such as Y, Er, Gd) alloy, the addition of rare earth is less, concentrates in the category of microalloying, and Zn and RE totality
Addition has certain limitation, i.e., and not higher than 5.0%.With reference to specific rolling mill practice, it is illustrated as in this patent a kind of new
Rolling mill practice, it is mainly characterized in that segmentation rolling that high/low temperature is combined, i.e. high temperature deflection rolling sequence high deforms in low temperature
Amount rolling sequence, the separation of high and low temperature is dynamic recrystallization temperature line ± 25 DEG C of alloy.Deformation temperature interval is divided into height
Temperature, low-temperature space, high-temperature region deflection high, the relatively low deflection of low-temperature space, rolling speed are higher, concentrate on 1.0~2.5m/s, and
Multidirectional rolling technique is used in the operation of rolling.This alloy and its rolling technique being related in this patent are different from the past
Magnesium metal and its sheet material technology of preparing, it can obtain smooth surface, thinner thickness under quick preparation technology and be opened without fission
The high-quality magnesium sheet metal for splitting.
The content of the invention
It is related to a kind of new alloy and preparation method thereof in the present invention, there is provided a kind of magnesium that can be quickly rolled into sheet material
Metal material.Mg-Zn-Er alloys in invention, its alloying ingredients scope is relatively low, and does not contain Zr etc. compared with noble metal, is one
It is kind cheap but can quick rolled plate magnesium metal material.Breach current magnesium plastic deformation not enough so that magnesium metallic plate
Prepared by material processing, forming difficulty, is a kind of magnesium sheet metal material for possessing application prospect.
Alloying component：
In order to obtain the preferable Mg-Zn-Er alloys of the superplasticity ability, present invention employs following component：Selection Zn, Er
Used as main alloying elements, its addition is respectively 0~5.0wt.%Zn, 0~1.0wt.%Er, Zn and Er mass percent
Sum is not less than 0.5% and does not exceed 5.0%, and its balance of Mg, the preferably content of Zn, Er are not 0.Obtained using common melting
Obtain the casting alloy.
Rolling mill practice：
The alloy casting blank of preparation is heat-treated, heat treatment temperature is 400 DEG C, and soaking time is 10h, and is put in 70 DEG C
Warm quenching-in water.Then segmentation rolling is carried out, including at least high temperature rolling successively and zerolling, high temperature rolling temperature range is
350~500 DEG C, 25~35%, zerolling temperature range is 250~350 DEG C (not including 350 DEG C) to every time deflection,
10~25%, high temperature rolling and the accumulative deflection of zerolling are not less than 80% to every time deflection.
High temperature rolling and the rolling speed control of zerolling are adopted in 1.0~2.5m/s in the whole segmentation operation of rolling
Multidirectional milling method is used, i.e., rotating 0 °, 45 ° and 90 ° respectively as axle with normal is rolled.The sheet metal thickness for finally obtaining is
1.0~2.0mm, surface and the smooth of the edge, without cracking.
It is further above-mentioned in the operation of rolling, when the temperature of the two neighboring track time deformation operation of rolling is more than or equal to 45 DEG C,
Isothermal holding is carried out before carrying out the deformation rolling of the second passage, holding temperature is the temperature of the second passage deformation rolling, soaking time
It is 15-30min；Temperature further preferably in the two neighboring track time deformation operation of rolling is more than or equal to 100 DEG C, and deforms for the first time
When rolling temperature is higher than second deformation rolling temperature, isothermal holding twice is carried out before the deformation rolling of the second passage is carried out, the
The temperature of secondary isothermal holding is the temperature of the second passage deformation rolling, and the holding temperature of first time is between correspondence two passages deformation
Certain temperature between rolling temperature；Soaking time is respectively 15-30min twice.
Substantive distinguishing features of the invention and marked improvement：
1) invented it is a kind of can quick roll forming magnesium metal material, total deformation rolls speed up to more than 80%
Maximum reachable 2.5m/s, up to 35%, its crystallized ability is closed single pass maximum deformation quantity better than Mg-Zn-RE systems common at present
Gold.
2) present invention employs a kind of new rolling technique, the technology is called segmentation rolling, i.e. high temperature deflection high rolls
Stage processed, deflection rolling sequence in low temperature, the separation of high and low temperature is dynamic recrystallization temperature line ± 25 DEG C of alloy.Its
Obvious to be characterised by that high temperature rolling temperature range is 350~500 DEG C, every time deflection is interval interior 25~35%, low temperature
It is 250~350 DEG C (not including 350 DEG C) that rolling temperature is interval, and every time deflection is interval interior 10~25%.
3) rolling technique in the present invention additionally uses multidirectional rolling in addition to high/low temperature segmentation rolling, with normal as axle,
Rolled after 0 °, 45 ° and 90 ° of rotary sample respectively.
4) new superplasticity lightweight magnesium alloy material, it is substantially distinguished from conventional Mg-Zn-RE alloys.
5) preparation of the alloy, processing method are simple, and crystallized ability is strong, and deformation velocity is fast, it is not necessary to special installation
Obtain the smooth magnesium sheet metal in surface.
Brief description of the drawings book
Magnesium sheet metal in Fig. 1 embodiments 1；
Magnesium sheet metal in Fig. 2 embodiments 2；
Magnesium sheet metal in Fig. 3 embodiments 3.
Specific embodiment
With reference to embodiment, the present invention will be further described, but the present invention is not limited to following examples.
Embodiment 1
The Mg-0.5Zn-0.5Er alloy solid solutions treatment that will be obtained by conventional cast, then carries out cutting and cuts milling to be rolled
Blank, and the blank is positioned in holding furnace is processed, insulation furnace temperature is 400 DEG C.It is 2.0m/s to set rolling speed.
First, rolling temperature is 400 DEG C, and the 1st pass deformation is 30%, then and then carries out the 2nd passes, current deflection
It is 25%, above rolling direction is 0 °；Then the alloy is positioned in 345 DEG C of holding furnaces and is incubated, soaking time is
15min, then rolls the alloy cold stage, and rolling temperature is 345 DEG C, and single pass heavy deformation is 10%, and rolling direction is
90 °, 2 passages are rolled altogether；Then the alloy is positioned in holding furnace and is incubated, holding temperature is 300 DEG C, soaking time
It is 30min, the alloy of good heat insulation is continued in cold stage rolling, rolling temperature is 300 DEG C, and single pass heavy deformation is 15%,
Rolling direction is 45 °, and 2 passages are rolled altogether.Then, alloy is positioned in holding furnace and is incubated, holding temperature is 425 DEG C, single
Pass deformation is 25%, and rolling direction is 0 °, and 2 passages are rolled altogether.300 DEG C are then cooled the temperature to, 15min is incubated, after
Continuous rolling, single pass heavy deformation is 15%, and rolling direction is 0 °, and 1 passage is rolled altogether, obtains thickness and is about 1.2mm thick plates
Material, deflection adds up to be 85% that gained sheet material is as shown in Figure 1.
Embodiment 2
The Mg-1.0Zn-0.5Er alloy solid solutions treatment that will be obtained by conventional cast, then carries out cutting and cuts milling to be rolled
Blank, and the blank is positioned in holding furnace is processed, insulation furnace temperature is 450 DEG C.It is 2.5m/s to set rolling speed.
First, rolling temperature is 450 DEG C, and every time deflection is 25%, and above rolling direction is 0 °, rolls 1 passage；Then reduce and roll
To 400 DEG C, sample is incubated 15min to temperature processed at such a temperature, and every time deflection is 30%, and above rolling direction is 90 °, is rolled
Make 1 passage；Cold stage rolling is then carried out, rolling temperature is set as 300 DEG C, then is positioned in holding furnace by the alloy
Row insulation, holding temperature is 300 DEG C, and soaking time is 30min, and the alloy of good heat insulation is continued in cold stage rolling, rolling
Temperature is 300 DEG C, and single pass heavy deformation is 15%, and rolling direction is 45 °, and 1 passage is rolled altogether；Temperature is then risen to 475
DEG C, 15min is incubated, continue to roll, single pass heavy deformation is 25%, and rolling direction is 0 °, and 4 passages are rolled altogether, obtains thickness
About 1.1mm thickness sheet material, deflection accumulative about 86%, gained sheet material is as shown in Figure 2.
Embodiment 3
The Mg-1.5Zn-1.0Er alloy solid solutions treatment that will be obtained by conventional cast, then carries out cutting and cuts milling to be rolled
Blank, and the blank is positioned in holding furnace is processed, insulation furnace temperature is 400 DEG C.It is 2.5m/s to set rolling speed.
Rolling temperature is 400 DEG C, and pass deformation is 35%, and passage is 1 passage, and rolling direction is 0 °；Then the alloy is positioned over
It is incubated in 475 DEG C of holding furnaces, soaking time is 15min, is then rolled the alloy cold stage, rolling temperature is 475
DEG C, single pass heavy deformation is 25%, and rolling direction is 90 °, and 1 passage is rolled altogether；Then the alloy is positioned in holding furnace
It is incubated, holding temperature is 350 DEG C, and soaking time is 30min.Furnace temperature is then down to 250 DEG C, 15min is incubated, will be incubated
Good alloy continues in cold stage rolling, and rolling temperature is 250 DEG C, and single pass heavy deformation is 15%, and rolling direction is 45 °,
2 passages are rolled altogether.Then, alloy is positioned in holding furnace and is incubated, holding temperature is 500 DEG C, rolling temperature is 500 DEG C,
Single pass heavy deformation is 25%, and rolling direction is 0 °, and 3 passages are rolled altogether, obtains thickness and is about 1.2mm thickness sheet materials, is deformed
It is for about 85% that amount is accumulative, and gained sheet material is as shown in Figure 3.
Embodiment 4
The Mg-3Zn-0.75Er alloy solid solutions treatment that will be obtained by conventional cast, then carries out cutting and cuts milling to be rolled
Blank, and the blank is positioned in holding furnace is processed, insulation furnace temperature is 375 DEG C.It is 1.5m/s to set rolling speed.
Rolling temperature is 375 DEG C, and pass deformation is 30%, and passage is 1 passage, and rolling direction is 0 °；Then the alloy is positioned over
It is incubated in 450 DEG C of holding furnaces, soaking time is 15min, is then rolled the alloy cold stage, rolling temperature is 450
DEG C, single pass heavy deformation is 30%, and rolling direction is 45 °, and 1 passage is rolled altogether；Then the alloy is positioned in holding furnace
It is incubated, holding temperature is 400 DEG C, and soaking time is 20min.Furnace temperature is then down to 350 DEG C, 15min is incubated, will be incubated
Good alloy is rolled, and rolling temperature is 350 DEG C, and single pass heavy deformation is 25%, and rolling direction is 90 °, and 1 road is rolled altogether
It is secondary.Then, alloy is positioned in holding furnace and is incubated, holding temperature is 300 DEG C, rolling temperature is 300 DEG C, single pass heavy deformation
It is 10%, rolling direction is 0 °, 10 passages is rolled altogether, acquisition thickness is 1.0mm thickness sheet materials, and deflection adds up as about
88%.
Embodiment 5
The Mg-4Zn-1.0Er alloy solid solutions treatment that will be obtained by conventional cast, then carries out cutting and cuts milling acquisition rolling hair
Base, and the blank is positioned in holding furnace is processed, insulation furnace temperature is 500 DEG C.It is 1.5m/s to set rolling speed.Roll
Temperature processed is 400 DEG C, and pass deformation is 35%, and passage is 1 passage, and rolling direction is 0 °；The alloy is then positioned over 450
It is incubated in DEG C holding furnace, soaking time is 15min, is then rolled the alloy cold stage, rolling temperature is 450 DEG C,
Single pass heavy deformation is 25%, and rolling direction is 45 °, and 1 passage is rolled altogether；Then the alloy is positioned in holding furnace is carried out
Insulation, holding temperature is 350 DEG C, and soaking time is 30min.Furnace temperature is then down to 300 DEG C, 15min is incubated, by good heat insulation
Alloy continues in cold stage rolling, and rolling temperature is 300 DEG C, and single pass heavy deformation is 10%, and rolling direction is 90 °, altogether
Roll 3 passages.Then, alloy is positioned in holding furnace and is incubated, holding temperature is 450 DEG C, and single pass heavy deformation is 25%, is rolled
Temperature processed is 450 DEG C, and rolling direction is 0 °, rolls 2 passages altogether, and acquisitions thickness is 1.6mm thickness sheet materials, deflection add up be
80%.
Claims (7)
1. it is a kind of can the quick magnesium sheet metal of roll forming milling method, magnesium sheet metal, selection Zn, Er is used as main conjunction
Alloying element, its addition is respectively 0~5.0wt.%Zn, and 0~1.0wt.%Er, Zn and Er mass percent sum are not less than
0.5% and 5.0%, its balance of Mg are not exceeded；Characterized in that, carry out segmentation rolling, including at least high temperature rolling successively and
Zerolling, high temperature rolling temperature range is 350~500 DEG C, and every time deflection is 25~35%；Zerolling temperature range
It it is 250~350 DEG C, not comprising 350 DEG C, 10~25%, high temperature rolling and zerolling add up deflection to every time deflection
Not less than 80%；The whole segmentation operation of rolling use multidirectional milling method, i.e., with normal rotated respectively as axle 0 °, 45 ° and
90 ° are rolled.
2. according to the method for claim 1, it is characterised in that high temperature rolling and the rolling speed control of zerolling 1.0~
2.5m/s。
3. according to the method for claim 1, it is characterised in that the content of Zn, Er is not 0.
4. according to the method for claim 1, it is characterised in that in the operation of rolling, the temperature of the two neighboring track time deformation operation of rolling
When degree difference is more than or equal to 45 DEG C, isothermal holding is carried out before the deformation rolling of the second passage is carried out, holding temperature becomes for the second passage
The temperature of shape rolling, soaking time is 15-30min.
5. according to the method for claim 1, it is characterised in that be more than or equal in the temperature difference of the two neighboring track time deformation operation of rolling
100 DEG C, and when deformation rolling temperature is higher than second deformation rolling temperature for the first time, advance the deformation rolling of the second passage is carried out
Capable isothermal holding twice, the temperature of second isothermal holding is the temperature of the second passage deformation rolling, the holding temperature of first time
Certain temperature between correspondence two passages deformation rolling temperature；Soaking time is respectively 15-30min twice.
6. according to the method for claim 1, it is characterised in that before rolling is segmented, alloy casting blank is heat-treated, at heat
Reason temperature is 400 DEG C, and soaking time is 10h, and is put in 70 DEG C of warm quenching-in waters.
7. according to the method for claim 1, it is characterised in that the sheet metal thickness for finally obtaining is 1.0~2.0mm.
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| CN105817479A (en) * | 2016-03-18 | 2016-08-03 | 成都青元泛镁科技有限公司 | Rolling method for magnesium alloy sheet |
| CN109295366B (en) * | 2018-12-03 | 2020-03-27 | 北京工业大学 | Room-temperature high-forming magnesium alloy plate and preparation method thereof |
| CN113046663B (en) * | 2021-03-08 | 2022-08-02 | 北京工业大学 | Preparation method of 'double-layer sandwich' rolled high-strength rare earth magnesium alloy |
| CN115094356B (en) * | 2022-05-06 | 2023-07-21 | 中国科学院金属研究所 | Processing deformation method for cooperatively improving mechanical strength and plasticity of Mg-Li-Zn-Y magnesium lithium alloy |
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| EP1690954B1 (en) * | 2003-11-26 | 2014-10-08 | KAWAMURA, Yoshihito | High strength and high toughness magnesium alloy and method for production thereof |
| JP6373557B2 (en) * | 2013-02-08 | 2018-08-15 | 国立研究開発法人物質・材料研究機構 | Magnesium wrought alloy and method for producing the same |
| CN103255329B (en) * | 2013-05-07 | 2015-08-26 | 宝山钢铁股份有限公司 | A kind of Low-cost fine-grain weak-texture magnesium alloy sheet and manufacture method thereof |
| CN103316915B (en) * | 2013-06-24 | 2015-05-13 | 东北大学 | Method for preparing wide magnesium alloy sheet |
| CN104004979B (en) * | 2014-06-04 | 2016-08-24 | 北京工业大学 | A kind of microstructure thinning method improving magnesium alloy temperature-room type plasticity |
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