CN108624830A - A kind of magnesium alloy structural part and its extruding production - Google Patents
A kind of magnesium alloy structural part and its extruding production Download PDFInfo
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- CN108624830A CN108624830A CN201810347456.3A CN201810347456A CN108624830A CN 108624830 A CN108624830 A CN 108624830A CN 201810347456 A CN201810347456 A CN 201810347456A CN 108624830 A CN108624830 A CN 108624830A
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- magnesium alloy
- extrusion
- structural part
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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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
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- 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
Abstract
The invention discloses a kind of magnesium alloy structural part extruding productions, it is characterised in that the magnesium alloy ingot mass percentage composition is Zn：2.20%~3.20%, Al：2.60%~3.40%, Ti：0.20%~0.80%, Y：0.40%~1.50% remaining be Mg and not removable impurity element, include the following steps：A：Make the magnesium alloy blank of cuboid；B：Extrusion molding；C：Aging strengthening model.By using squeezing twice, and carry out different heat treatment twice, alloy does not have cracking situation, and so that crystal grain is obviously refined in alloy, dislocation is largely proliferated, and grain boundaries have a large amount of twins to generate, so that mechanical property is significantly improved, after squeezing twice, exemplar obtained its tensile strength >=365Mpa, yield strength >=240Mpa, elongation >=6% at room temperature；Again by obtaining tensile strength >=380MPa under room temperature, yield strength >=255MPa after ageing treatment, the complicated magnesium alloy structural part of elongation >=8% meets requirement.
Description
Technical field
The present invention relates to magnesium alloy deformation processing extrusion forming field, more particularly to a kind of magnesium alloy structural part, which squeezes, to be prepared
Method.
Background technology
Magnesium alloy density is small, specific strength is high, bigger than elasticity modulus, thermal diffusivity is good, is easy to machining, and has very well
Capability of electromagnetic shielding, damping vibration attenuation performance and the advantages such as processing cost is low, be aerospace, weaponry, automobile, 3C productions
The ideal selection of the components such as product, therefore can be widely applied to the works such as aerospace, weaponry, automobile and electric equipment products
Industry field.In order to which the high tough complicated magnesium alloy structural part of large scale is made, magnesium alloy plastic forming process becomes material processing neck
One important topic in domain, since magnesium alloy belongs to Patterns for Close-Packed Hexagonal Crystal (hcp) structure, slip system is relatively fewer, at room temperature
Its plastic deformation ability force difference, it is difficult to which Plastic Forming is difficult to solve the problems, such as this by traditional Technology of Plastic Processing.Notification number
CN107747014A entitled " one kind having high ductibility high-strength magnesium alloy and preparation method thereof " discloses quality percentage
Than for：6.0~9.0% Zn, 3.0~6.0% Gd, 0.4~1.0% Zr, 0.05~0.20% Sr, 0.05~
1.5% Y, Mg has high ductibility high-strength magnesium alloy and preparation method thereof for surplus, is directed to the magnesium alloy ingot blank and exists
It is squeezed in extrusion cylinder, extrusion speed is 1.0~5.0m/min, and extrusion cylinder preheating temperature is 300~400 DEG C, and extrusion ratio is
10~50:1, the technical solution description of extruded bars is obtained, is not related to high tough multiple using extrusion process preparation large scale
The method of miscellaneous magnesium alloy extrusion structural member.
Invention content
The embodiment of the present invention is solved by providing a kind of magnesium alloy structural part extruding production in the prior art due to magnesium
Alloy belongs to Patterns for Close-Packed Hexagonal Crystal structure, and slip system is relatively fewer, at room temperature its plastic deformation ability force difference, it is difficult to Plastic Forming
The problem of large scale high tough complicated magnesium alloy structural part is made.
The present invention provides a kind of large scale magnesium alloy with high strength and ductility extrusion preparation method, comes by the following technical programs real
It is existing：
A kind of magnesium alloy structural part extruding production, it is characterised in that the magnesium alloy ingot mass percentage composition is
Zn：2.20%~3.20%, Al：2.60%~3.40%, Ti：0.20%~0.80%, Y：0.40%~1.50% remaining be
Mg and not removable impurity element, include the following steps：
A：Make the magnesium alloy blank of cuboid；
B：Extrusion molding；
C：Aging strengthening model.
Specifically, the cuboid magnesium alloy blank specification made in step A is：Long 100mm~3000mm, wide 100mm~
2000mm, high 100mm~300mm.
Specifically, preheating temperature is 450 DEG C~480 DEG C to blank for the first time in step B extrusion process, processing time 1h~
4h；Extrusion die preheating temperature is 450 DEG C~480 DEG C, processing time 2h~6h, and extrusion speed is controlled in extrusion process, is squeezed
Speed 1mm/s~10mm/s, extrusion ratio 80~120；Blank secondary heat treatment temperature is 300 DEG C~350 DEG C, processing time 1h~
4h；Extrusion die preheating temperature is 300 DEG C~350 DEG C, processing time 1h~4h, and extrusion speed is controlled during secondary extrusion,
Magnesium alloy extrusion part is made in extrusion speed 0.1mm/s~4mm/s, extrusion ratio 40~80.
Preferably, it is molten with water that colloidal graphite mixed with water, colloidal graphite mixed with water are used in step B extrusion process
Agent, including graphite 15wt%~20wt%, soda ash 20wt%~25wt%, surfactant 3wt%~6wt%, dispersant
2wt%~6wt%.
Specifically, to carrying out ageing treatment, timeliness after the magnesium alloy extrusion part turnery processing obtained by step B in step C
Treatment temperature is 175 DEG C~190 DEG C, keeps the temperature 18h~30h, is air-cooled to room temperature later.
The present invention also provides a kind of magnesium alloy structural parts, are prepared by above-mentioned preparation method.
Further, tensile strength >=380MPa under the magnesium alloy structural part room temperature, yield strength >=255MPa are stretched
Long rate >=8%.
Further, the magnesium alloy structural part is the structural member of complicated shape, as shown in Figure 1.
A kind of large scale magnesium alloy with high strength and ductility extrusion preparation process of the present invention carries out two by using squeezing twice
Secondary different heat treatment, alloy do not have cracking situation, and so that crystal grain is obviously refined in alloy, and dislocation is largely proliferated,
Grain boundaries have a large amount of twins to generate, so that mechanical property is significantly improved, after squeezing twice, exemplar room obtained
Temperature lower its tensile strength >=365Mpa, yield strength >=240Mpa, elongation >=6%；Again by obtaining room temperature after ageing treatment
Lower tensile strength >=380MPa, yield strength >=255MPa, the complicated magnesium alloy structural part of elongation >=8% meet use and want
It asks.The present invention explores a kind of high tough complicated magnesium alloy structural part extruding preparation process of large scale, this is to meeting aerospace, army
The demand of the high tough complicated magnesium alloy structural part of the fields such as thing weaponry large scale, is of great significance.
Description of the drawings
Fig. 1 is magnesium alloy complicated shape structural member schematic diagram.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment belongs to the scope of protection of the invention more.
Embodiment 1：Magnesium alloy blank first carries out homogenization heat treatment, and 480 DEG C of heating temperature keeps the temperature 1h, and extrusion die is pre-
480 DEG C of hot temperature keeps the temperature 2h, squeezes the magnesium alloy blank after preheating, uses water-based graphite for lubrication in extrusion process
Agent, using water as solvent, wherein graphite 20%, soda ash 25%, surfactant 6%, 4% ratio of dispersant are prepared, extrusion speed
8mm/s, extrusion ratio 90 carry out secondary heat treatment after air-cooled, 300 DEG C of temperature keeps the temperature 2h, secondary squish velocity 2mm/s, extrusion ratio
55, ageing treatment is carried out after air-cooled to obtained large scale magnesium alloy with high strength and ductility extrusion, aging temperature is 190 DEG C,
18h is kept the temperature, is air-cooled to room temperature later, it is final to obtain magnesium alloy complicated shape structural member.
Room-temperature mechanical property test is carried out according to GB/T228-2002, the results are shown in Table 1.
Embodiment 2：Magnesium alloy blank first carries out homogenization heat treatment, and 460 DEG C of heating temperature keeps the temperature 3h, and extrusion die is pre-
460 DEG C of hot temperature keeps the temperature 3h, squeezes the magnesium alloy blank after preheating, uses water-based graphite for lubrication in extrusion process
Agent, using water as solvent, wherein graphite 15%, soda ash 20%, surfactant 5%, 6% ratio of dispersant are prepared, extrusion speed
5mm/s, extrusion ratio 100 carry out secondary heat treatment after air-cooled, 350 DEG C of temperature keeps the temperature 1h, secondary squish velocity 3mm/s, squeezes
Than 60, ageing treatment, aging temperature 175 are carried out after air-cooled to obtained large scale magnesium alloy with high strength and ductility extrusion
DEG C, 26h is kept the temperature, is air-cooled to room temperature later, it is final to obtain magnesium alloy complicated shape structural member.
Room-temperature mechanical property test is carried out according to GB/T228-2002, the results are shown in Table 1.
Embodiment 3：Magnesium alloy blank first carries out homogenization heat treatment, and 450 DEG C of heating temperature keeps the temperature 2h, and extrusion die is pre-
450 DEG C of hot temperature keeps the temperature 2h, squeezes the magnesium alloy blank after preheating, uses water-based graphite for lubrication in extrusion process
Agent, using water as solvent, wherein graphite 18%, soda ash 24%, surfactant 4%, 2% ratio of dispersant are prepared, extrusion speed
4mm/s, extrusion ratio 120 carry out secondary heat treatment after air-cooled, 320 DEG C of temperature keeps the temperature 2h, secondary squish velocity 1mm/s, squeezes
Than 40, ageing treatment, aging temperature 180 are carried out after air-cooled to obtained large scale magnesium alloy with high strength and ductility extrusion
DEG C, heat preservation for 24 hours, is air-cooled to room temperature later, final to obtain magnesium alloy complicated shape structural member.
Room-temperature mechanical property test is carried out according to GB/T228-2002, the results are shown in Table 1.
Comparative example：Magnesium alloy blank first carries out homogenization heat treatment, and 400 DEG C of heating temperature keeps the temperature 6h, extrusion die
400 DEG C of preheating temperature keeps the temperature 6h, squeezes the magnesium alloy blank after preheating, uses water-based graphite for profit in extrusion process
Lubrication prescription, using water as solvent, wherein graphite 10%, soda ash 10%, surfactant 4%, 2% ratio of dispersant are prepared, and squeeze speed
12mm/s is spent, extrusion ratio 50 carries out secondary heat treatment after air-cooled, 200 DEG C of temperature keeps the temperature 2h, secondary squish velocity 1mm/s, squeezes
Pressure ratio 30 carries out ageing treatment, aging temperature 200 after air-cooled to obtained large scale magnesium alloy with high strength and ductility extrusion
DEG C, 16h is kept the temperature, is air-cooled to room temperature later, obtains magnesium alloy complicated shape structural member.
Room-temperature mechanical property test is carried out according to GB/T228-2002, the results are shown in Table 1, in table the results show that by the present invention
The magnesium alloy structural part performance that is prepared of method meet tensile strength >=380MPa under room temperature, yield strength >=255MPa,
The requirement of elongation >=8%, and the magnesium alloy structural part performance that the method for the prior art is prepared has apparent difference.
Magnesium alloy mechanical property table prepared by 1. embodiment of the present invention of table
| Tensile strength/MPa | Yield strength/MPa | Elongation/% | |
| Embodiment 1 | 386 | 262 | 8.3 |
| Embodiment 2 | 385 | 258 | 8.6 |
| Embodiment 3 | 391 | 274 | 8.1 |
| Comparative example | 362 | 241 | 6.5 |
Claims (8)
1. a kind of magnesium alloy structural part extruding production, it is characterised in that the magnesium alloy ingot mass percentage composition is
Zn：2.20%~3.20%, Al：2.60%~3.40%, Ti：0.20%~0.80%, Y：0.40%~1.50% remaining be
Mg and not removable impurity element, include the following steps：
A：Make the magnesium alloy blank of cuboid；
B：Extrusion molding；
C：Aging strengthening model.
2. magnesium alloy structural part extruding production according to claim 1, it is characterised in that：The length made in step A
Cube magnesium alloy blank specification is：Long 100mm~3000mm, wide 100mm~2000mm, high 100mm~300mm.
3. magnesium alloy structural part extruding production according to claim 2, it is characterised in that：Step B extrusion molding mistakes
Preheating temperature is 450 DEG C~480 DEG C to blank for the first time in journey, processing time 1h~4h；Extrusion die preheating temperature be 450 DEG C~
480 DEG C, processing time 2h~6h, control extrusion speed in extrusion process, extrusion speed 1mm/s~10mm/s, extrusion ratio 80~
120；Blank secondary heat treatment temperature is 300 DEG C~350 DEG C, processing time 1h~4h；Extrusion die preheating temperature be 300 DEG C~
350 DEG C, processing time 1h~4h, secondary extrusion controls extrusion speed, extrusion speed 0.1mm/s~4mm/s, extrusion ratio in the process
40~80, magnesium alloy extrusion part is made.
4. magnesium alloy structural part extruding production according to claim 3, it is characterised in that：Step B extrusion molding mistakes
Colloidal graphite mixed with water is used in journey, colloidal graphite mixed with water is using water as solvent, including graphite 15wt%~20wt%, soda ash
20wt%~25wt%, surfactant 3wt%~6wt%, dispersant 2wt%~6wt%.
5. magnesium alloy structural part extruding production according to claim 4, it is characterised in that：To step B institutes in step C
Ageing treatment is carried out after magnesium alloy extrusion part turnery processing obtained, aging temperature is 175 DEG C~190 DEG C, heat preservation 18h~
30h is air-cooled to room temperature later.
6. a kind of magnesium alloy structural part, it is characterised in that be prepared by the preparation method as described in claim 1-5.
7. magnesium alloy structural part according to claim 6, it is characterised in that tensile strength under magnesium alloy structural part room temperature >=
380MPa, yield strength >=255MPa, elongation >=8%.
8. magnesium alloy structural part according to claim 7, it is characterised in that the magnesium alloy structural part is complicated shape
Structural member, as shown in Figure 1.
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Cited By (4)
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| CN112442621A (en) * | 2020-11-04 | 2021-03-05 | 长沙新材料产业研究院有限公司 | Magnesium alloy plate and preparation method thereof |
| CN112458348A (en) * | 2020-11-04 | 2021-03-09 | 长沙新材料产业研究院有限公司 | Magnesium alloy semicircular ring section bar and preparation method thereof |
| CN112547826A (en) * | 2020-12-24 | 2021-03-26 | 中国兵器工业第五九研究所 | Magnesium alloy forming method with gradient temperature and rate field |
| CN114892055A (en) * | 2022-05-25 | 2022-08-12 | 鹤壁海镁科技有限公司 | High-strength and high-toughness Mg-Al-Zn magnesium alloy and preparation method thereof |
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| CN112442621A (en) * | 2020-11-04 | 2021-03-05 | 长沙新材料产业研究院有限公司 | Magnesium alloy plate and preparation method thereof |
| CN112458348A (en) * | 2020-11-04 | 2021-03-09 | 长沙新材料产业研究院有限公司 | Magnesium alloy semicircular ring section bar and preparation method thereof |
| CN112547826A (en) * | 2020-12-24 | 2021-03-26 | 中国兵器工业第五九研究所 | Magnesium alloy forming method with gradient temperature and rate field |
| CN114892055A (en) * | 2022-05-25 | 2022-08-12 | 鹤壁海镁科技有限公司 | High-strength and high-toughness Mg-Al-Zn magnesium alloy and preparation method thereof |
| CN114892055B (en) * | 2022-05-25 | 2023-09-05 | 鹤壁海镁科技有限公司 | High-strength and high-toughness Mg-Al-Zn magnesium alloy and preparation method thereof |
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