CN107225220A - A kind of manufacture method of the magnesium alloy for cabinet of speed changer of superpower corrosion resistance - Google Patents
A kind of manufacture method of the magnesium alloy for cabinet of speed changer of superpower corrosion resistance Download PDFInfo
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- CN107225220A CN107225220A CN201710366206.XA CN201710366206A CN107225220A CN 107225220 A CN107225220 A CN 107225220A CN 201710366206 A CN201710366206 A CN 201710366206A CN 107225220 A CN107225220 A CN 107225220A
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- magnesium alloy
- speed changer
- cabinet
- manufacture method
- corrosion resistance
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/30—Anodisation of magnesium or alloys based thereon
Abstract
The invention discloses a kind of manufacture method of the magnesium alloy for cabinet of speed changer of superpower corrosion resistance of mission case manufacturing technology field, the manufacture method step of the magnesium alloy for cabinet of speed changer of this kind of superpower corrosion resistance is as follows：S1：Chosen material；S2：White molding is made；S3：Swabbing；S4：Bake and bank up with earth；S5：Melting and cast；S6：Differential arc oxidation, the manufacture method of the magnesium alloy for cabinet of speed changer of this kind of superpower corrosion resistance, beneficial to the decay resistance for improving magnesium alloy, forms the Al of densification by adding rare-earth element cerium in feeding in follow-up micro-arc oxidation process2O3Oxide-film, substantially increases anti-oxidant, the corrosion resistance of magnesium alloy by magnesium alloy tight internally, solves mission case in light-weight design the problem of magnesium alloy oxidation and corrosion scarce capacity.
Description
Technical field
The present invention relates to mission case manufacturing technology field, specially a kind of magnesium alloy speed changer of superpower corrosion resistance
The manufacture method of casing.
Background technology
Magnesium alloy is as most light structural metallic materials at present, and its density is low, and specific strength, specific stiffness are high, with good
Damping and amortization, damping performance is good.The fusing point of magnesium alloy is low, and setting rate is fast, it is consumed energy in casting technique low, fills type soon,
Casting character is good, and thermal conductivity and capability of electromagnetic shielding are excellent, and machinability is good, are described as the green engineering material in this century
Material, in space flight, automobile, the field such as electronics industry is widely used, for example gear box of automobile, cylinder cover, wheel hub,
Seat support etc..The continuous improvement realized with energy-conserving and environment-protective, automotive light weight technology demand is increasingly urgent, the drop of vehicle complete vehicle quality
Low is to reduce the important means of fuel consumption, and under proof strength, rigidity requirement, magnesium alloy turns into automobile lightweight, carries
The preferred material of high energy-saving environment protection, so that the further development for magnesium alloy in industrial circle brings new power.However,
When magnesium-alloy material works in exposed environment, easily it is oxidized, corrosion is easy when particularly with other metal parts assembly connections
Produce galvanic corrosion, stress corrosion etc..The functional reliability and service life of product are significantly reduced, makes magnesium-alloy material
Application level is by larger limitation.In view of it is mentioned above the problem of, a kind of magnesium alloy of superpower corrosion resistance of present invention design becomes
The manufacture method of fast device casing, to solve problem mentioned above.
The content of the invention
It is an object of the invention to provide a kind of manufacture method of the magnesium alloy for cabinet of speed changer of superpower corrosion resistance, to solve
When the magnesium-alloy material proposed in certainly above-mentioned background technology works in exposed environment, easily it is oxidized, the problem of corrosion.
To achieve the above object, the present invention provides following technical scheme：A kind of magnesium alloy speed changer of superpower corrosion resistance
The manufacture method of casing, the manufacture method step of the magnesium alloy for cabinet of speed changer of this kind of superpower corrosion resistance is as follows：
S1：Chosen material：Mission case is Al with casting magnesium alloy material each component and mass percent：(3.5%-
8.5%), Mn：(0.2%-0.8%), Zn：(0.46%-0.84%), Ce：(0.8%-1.6%), remaining is Mg；
S2：White molding is made：Using polystyrene (EPS, 10.21kg/m3) as white mould foamed material, utilize prefoam work
Skill makes mission case foam element with foaming；
S3：Swabbing：Added into agitator in 1.0-1.6Kg epoxy novolac curing agent, whipping process and be slowly added to grain
The mullite powder 1.4-1.8Kg of 300 mesh is spent, mixing time is continuously stirred for 7-9 minutes, prevents caking, form coating, first will
Agitator is carried to the top of mission case foam element, is toppled over from top to down outside certain coating to mission case foam element
Wall, then the coating stirred uniformly brushed surfaces externally and internally 2-4 times in mission case foam element, often brushed with hairbrush
A time coating, is dried 10-20 minutes, temperature setting when being dripped without coating, will become at 40-60 DEG C in electric heating convection oven
Fast device casing foam element, which is placed on sander, uniformly spreads mullite sand, is then immersed in liquor alumini chloridi and hardens 10-20 points
Clock, is stored at room temperature dry 1.5-2.5 hours, repeats after aforesaid operations three times, empty dry 3-5 hours, environment temperature 26 is stood afterwards
DEG C, relative humidity 50%, wind speed 3-5m/s；
S4：Bake and bank up with earth：It is calcined drying in the formwork push-in roaster after hardening, sintering temperature 900-11000C, during roasting
Between 1.5-2.5 hours, after coming out of the stove by formwork stand 30-50 minutes, when temperature is down to room temperature, the carbon ash in whole formwork is blown
Go；
S5：Melting and cast：Mission case after baking and banking up with earth is embedded in vibration ramming in dry sand, vacuum is then evacuated, makes
Stress control is obtained in 0.03-0.05MPa, then carries out the crucible of melting to be preheated to dark red state, then one is sprinkled in its bottom
Layer coverture, and the U.S. alloy pig dried in advance is put into crucible, a certain amount of cover then is sprinkled on U.S. alloy pig again
Lid agent, crucible is put into resistance furnace, and is passed through protective gas, and temperature control is incubated 0.5-0.6 hours, stopped at 700-750 DEG C
Stove is taken the slag on molten metal surface off, poured into a mould to pouring temperature 680, after casting complete, and covering is sprinkled on pouring cup
Agent, unpacks after solidification to be cooled, cuts off rising head and spray painting, obtain casting；
S6：Differential arc oxidation：Casting is cleaned 2-4 minutes with deionized water, anode aluminum steel is connected with casting, and stainless steel plate is done
In negative electrode immersion electrolyte, bath composition is：6g/LNa2SiO3, 2g/LNaF and 2g/LNaOH add suitable quantity of water stirring equal
Even, pH value control is 7, and reaction time control was at 8-12 minutes, current density 3A/d ㎡, and frequency is 300Hz, and dutycycle is
45%, after reaction terminates, casting is taken out in power-off, rinses drying 10-20 minutes, can both obtain top layer be attached with one layer it is fine and close
AL2O3The magnesium alloy for cabinet of speed changer casting of oxide-film.
It is preferred that, uniformly spread three times mullite sand, first pass mullite fineness of sand 20-50 mesh, second in the step S3
All over be mullite fineness of sand 15-45 mesh, the 3rd time mullite fineness of sand 10-30 mesh.
It is preferred that, the crucible in the step S5 is steel crucibles.
It is preferred that, the coverture in the step S5 is MgCl2And CaF2Mixture.
It is preferred that, the protective gas composition in the step S5 is CO2And 0.3%SF6.
Compared with prior art, the beneficial effects of the invention are as follows：The magnesium alloy for cabinet of speed changer of this kind of superpower corrosion resistance
Manufacture method, by adding rare-earth element cerium in feeding, beneficial to the decay resistance for improving magnesium alloy, follow-up micro-
The Al of densification is formed in arc oxidizing process2O3Oxide-film, substantially increases the anti-of magnesium alloy by magnesium alloy tight internally
Oxidation, corrosion resistance, solve mission case magnesium alloy oxidation and corrosion scarce capacity in light-weight design and ask
Topic.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment one
A kind of manufacture method of the magnesium alloy for cabinet of speed changer of superpower corrosion resistance, the magnesium alloy of this kind of superpower corrosion resistance
The manufacture method step of mission case is as follows：
S1：Chosen material：Mission case is Al with casting magnesium alloy material each component and mass percent：3.5%th,
Mn：0.2%th, Zn：0.46%th, Ce：0.8%, remaining is Mg；
S2：White molding is made：Using polystyrene (EPS, 10.21kg/m3) as white mould foamed material, utilize prefoam work
Skill makes mission case foam element with foaming；
S3：Swabbing：Added into agitator in 1.0Kg epoxy novolac curing agent, whipping process and be slowly added to granularity 300
Purpose mullite powder 1.4Kg, continuously stirred mixing time for 7 minutes, prevented caking, formed coating, first by agitator carry to
The top of mission case foam element, topples over certain coating to the outer wall of mission case foam element, then with hair from top to down
The coating that stir uniformly is brushed surfaces externally and internally 2 times in mission case foam element by brush, a coating has often been brushed, in electricity
Dried 10 minutes in hot blast baking oven, when being dripped without coating, mission case foam element is placed at 40 DEG C for temperature setting
Mullite sand uniformly is spread on sander, is then immersed in liquor alumini chloridi and hardens 10 minutes, is stored at room temperature and dries 1.5 hours,
After repetition aforesaid operations three times, sky is stood afterwards and is done 3 hours, 26 DEG C of environment temperature, relative humidity 50%, wind speed 3m/s, uniformly
Spread three times mullite sand, the mesh of first pass mullite fineness of sand 20, second time is the mesh of mullite fineness of sand 30, the 3rd time mullite sand
The mesh of granularity 20；
S4：Bake and bank up with earth：It is calcined drying in the formwork push-in roaster after hardening, sintering temperature 9000C, roasting time 1.5
Hour, formwork is stood 30 minutes after coming out of the stove, when temperature is down to room temperature, the carbon ash in whole formwork blown away；
S5：Melting and cast：Mission case after baking and banking up with earth is embedded in vibration ramming in dry sand, vacuum is then evacuated, makes
Stress control is obtained in 0.03MPa, then the crucible of melting is carried out to being preheated to dark red state, then spread last layer in its bottom covering
Agent, and the U.S. alloy pig dried in advance is put into crucible, crucible is steel crucibles, then sprinkles one on U.S. alloy pig again
Quantitative coverture, coverture is MgCl2And CaF2Mixture, crucible is put into resistance furnace, and be passed through protective gas, protected
Shield gas componant is CO2And 0.3%SF6, temperature control is incubated 0.5 hour at 700 DEG C, and blowing out to 680 DEG C of pouring temperature is taken off
The slag on molten metal surface is removed, is poured into a mould, after casting complete, coverture is sprinkled on pouring cup, unpacked after solidification to be cooled,
Rising head and spray painting are cut off, casting is obtained；
S6：Differential arc oxidation：Casting is cleaned 2 minutes with deionized water, anode aluminum steel is connected with casting, and stainless steel plate does the moon
In pole immersion electrolyte, bath composition is：6g/LNa2SiO3, 2g/LNaF and 2g/LNaOH add suitable quantity of water and stir,
PH value control is 7, and the reaction time was controlled at 8 minutes, and current density 3A/d ㎡, frequency is 300Hz, and dutycycle is 45%, reaction
After end, casting is taken out in power-off, rinses drying 10 minutes, can both obtain top layer and be attached with one layer of fine and close AL2O3Oxide-film
Magnesium alloy for cabinet of speed changer casting.
Embodiment two
A kind of manufacture method of the magnesium alloy for cabinet of speed changer of superpower corrosion resistance, the magnesium alloy of this kind of superpower corrosion resistance
The manufacture method step of mission case is as follows：
S1：Chosen material：Mission case is Al with casting magnesium alloy material each component and mass percent：6%th, Mn：
0.5%th, Zn：0.65%th, Ce：1.2%, remaining is Mg；
S2：White molding is made：Using polystyrene (EPS, 10.21kg/m3) as white mould foamed material, utilize prefoam work
Skill makes mission case foam element with foaming；
S3：Swabbing：Added into agitator in 1.3Kg epoxy novolac curing agent, whipping process and be slowly added to granularity 300
Purpose mullite powder 1.6Kg, continuously stirred mixing time for 8 minutes, prevented caking, formed coating, first by agitator carry to
The top of mission case foam element, topples over certain coating to the outer wall of mission case foam element, then with hair from top to down
The coating that stir uniformly is brushed surfaces externally and internally 3 times in mission case foam element by brush, a coating has often been brushed, in electricity
Dried 15 minutes in hot blast baking oven, when being dripped without coating, mission case foam element is placed at 50 DEG C for temperature setting
Mullite sand uniformly is spread on sander, is then immersed in liquor alumini chloridi and hardens 15 minutes, is stored at room temperature and dries 2 hours, weight
After multiple aforesaid operations three times, stand afterwards empty dry 4 hours, 26 DEG C of environment temperature, relative humidity 50%, wind speed 4m/s is uniformly spread
Three times mullite sand, the mesh of first pass mullite fineness of sand 35, second time is the mesh of mullite fineness of sand 30, the 3rd time mullite sand grains
Spend 20 mesh；
S4：Bake and bank up with earth：It is calcined drying in the formwork push-in roaster after hardening, 1000 DEG C of sintering temperature, roasting time 2 is small
When, formwork is stood 40 minutes after coming out of the stove, when temperature is down to room temperature, the carbon ash in whole formwork blown away；
S5：Melting and cast：Mission case after baking and banking up with earth is embedded in vibration ramming in dry sand, vacuum is then evacuated, makes
Stress control is obtained in 0.04MPa, then the crucible of melting is carried out to being preheated to dark red state, then spread last layer in its bottom covering
Agent, and the U.S. alloy pig dried in advance is put into crucible, crucible is steel crucibles, then sprinkles one on U.S. alloy pig again
Quantitative coverture, coverture is MgCl2And CaF2Mixture, crucible is put into resistance furnace, and be passed through protective gas, protected
Shield gas componant is CO2And 0.3%SF6, temperature control is incubated 0.55 hour at 725 DEG C, and blowing out to 680 DEG C of pouring temperature is taken off
The slag on molten metal surface is removed, is poured into a mould, after casting complete, coverture is sprinkled on pouring cup, unpacked after solidification to be cooled,
Rising head and spray painting are cut off, casting is obtained；
S6：Differential arc oxidation：Casting is cleaned 3 minutes with deionized water, anode aluminum steel is connected with casting, and stainless steel plate does the moon
In pole immersion electrolyte, bath composition is：6g/LNa2SiO3, 2g/LNaF and 2g/LNaOH add suitable quantity of water and stir,
PH value control is 7, and the reaction time was controlled at 10 minutes, and current density 3A/d ㎡, frequency is 300Hz, and dutycycle is 45%, reaction
After end, casting is taken out in power-off, rinses drying 15 minutes, can both obtain top layer and be attached with one layer of fine and close AL2O3Oxide-film
Magnesium alloy for cabinet of speed changer casting.
Embodiment three
A kind of manufacture method of the magnesium alloy for cabinet of speed changer of superpower corrosion resistance, the magnesium alloy of this kind of superpower corrosion resistance
The manufacture method step of mission case is as follows：
S1：Chosen material：Mission case is Al with casting magnesium alloy material each component and mass percent：8.5%th,
Mn：0.8%th, Zn：0.84%th, Ce：1.6%, remaining is Mg；
S2：White molding is made：Using polystyrene (EPS, 10.21kg/m3) as white mould foamed material, utilize prefoam work
Skill makes mission case foam element with foaming；
S3：Swabbing：Added into agitator in 1.6Kg epoxy novolac curing agent, whipping process and be slowly added to granularity 300
Purpose mullite powder 1.8Kg, continuously stirred mixing time for 9 minutes, prevented caking, formed coating, first by agitator carry to
The top of mission case foam element, topples over certain coating to the outer wall of mission case foam element, then with hair from top to down
The coating that stir uniformly is brushed surfaces externally and internally 4 times in mission case foam element by brush, a coating has often been brushed, in electricity
Dried 20 minutes in hot blast baking oven, when being dripped without coating, mission case foam element is placed at 60 DEG C for temperature setting
Mullite sand uniformly is spread on sander, is then immersed in liquor alumini chloridi and hardens 20 minutes, is stored at room temperature and dries 2.5 hours,
After repetition aforesaid operations three times, sky is stood afterwards and is done 5 hours, 26 DEG C of environment temperature, relative humidity 50%, wind speed 5m/s, uniformly
Spread three times mullite sand, the mesh of first pass mullite fineness of sand 50, second time is the mesh of mullite fineness of sand 40, the 3rd time mullite sand
The mesh of granularity 30；
S4：Bake and bank up with earth：It is calcined drying in the formwork push-in roaster after hardening, 1100 DEG C of sintering temperature, roasting time 2.5
Hour, formwork is stood 50 minutes after coming out of the stove, when temperature is down to room temperature, the carbon ash in whole formwork blown away；
S5：Melting and cast：Mission case after baking and banking up with earth is embedded in vibration ramming in dry sand, vacuum is then evacuated, makes
Stress control is obtained in 0.05MPa, then the crucible of melting is carried out to being preheated to dark red state, then spread last layer in its bottom covering
Agent, and the U.S. alloy pig dried in advance is put into crucible, crucible is steel crucibles, then sprinkles one on U.S. alloy pig again
Quantitative coverture, coverture is MgCl2And CaF2Mixture, crucible is put into resistance furnace, and be passed through protective gas, protected
Shield gas componant is CO2And 0.3%SF6, temperature control is incubated 0.6 hour at 750 DEG C, and blowing out to 680 DEG C of pouring temperature is taken off
The slag on molten metal surface is removed, is poured into a mould, after casting complete, coverture is sprinkled on pouring cup, unpacked after solidification to be cooled,
Rising head and spray painting are cut off, casting is obtained；
S6：Differential arc oxidation：Casting is cleaned 4 minutes with deionized water, anode aluminum steel is connected with casting, and stainless steel plate does the moon
In pole immersion electrolyte, bath composition is：6g/LNa2SiO3, 2g/LNaF and 2g/LNaOH add suitable quantity of water and stir,
PH value control is 7, and the reaction time was controlled at 12 minutes, and current density 3A/d ㎡, frequency is 300Hz, and dutycycle is 45%, reaction
After end, casting is taken out in power-off, rinses drying 20 minutes, can both obtain top layer and be attached with one layer of fine and close AL2O3Oxide-film
Magnesium alloy for cabinet of speed changer casting.
Model is solved by ABAQUS solvers according to the experimental result of embodiment one, two, three, stress point is drawn
Butut is summarized and drawn：Optimum implementation is embodiment two.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of manufacture method of the magnesium alloy for cabinet of speed changer of superpower corrosion resistance, it is characterised in that：This kind superpower anticorrosive
The manufacture method step of the magnesium alloy for cabinet of speed changer of property is as follows：
S1：Chosen material：Mission case is Al with casting magnesium alloy material each component and mass percent：(3.5%-
8.5%), Mn：(0.2%-0.8%), Zn：(0.46%-0.84%), Ce：(0.8%-1.6%), remaining is Mg；
S2：White molding is made：Using polystyrene (EPS, 10.21kg/m3) as white mould foamed material, using pre-expansion process with
Foaming makes mission case foam element；
S3：Swabbing：Added into agitator in 1.0-1.6Kg epoxy novolac curing agent, whipping process and be slowly added to granularity 300
Purpose mullite powder 1.4-1.8Kg, continuously stirs mixing time for 7-9 minutes, prevents caking, form coating, first will stirring
Bucket is carried to the top of mission case foam element, certain coating is toppled over from top to down to the outer wall of mission case foam element, so
The coating stirred is uniformly brushed to surfaces externally and internally 2-4 times in mission case foam element with hairbrush afterwards, often brushed one time
Coating, is dried 10-20 minutes, temperature setting is at 40-60 DEG C, when being dripped without coating, by speed changer in electric heating convection oven
Casing foam element, which is placed on sander, uniformly spreads mullite sand, is then immersed in liquor alumini chloridi and hardens 10-20 minutes, room
Warm standing and drying 1.5-2.5 hours, repeat after aforesaid operations three times, empty dry 3-5 hours, 26 DEG C of environment temperature, phase are stood afterwards
To humidity 50%, wind speed 3-5m/s；
S4：Bake and bank up with earth：It is calcined drying in the formwork push-in roaster after hardening, 900-1100 DEG C of sintering temperature, roasting time
1.5-2.5 hours, formwork is stood 30-50 minutes after coming out of the stove, when temperature is down to room temperature, the carbon ash in whole formwork blown
Go；
S5：Melting and cast：Mission case after baking and banking up with earth is embedded in vibration ramming in dry sand, vacuum is then evacuated so that pressure
Then the crucible progress of melting is preheated to dark red state, then spreads last layer in its bottom and covered by power control in 0.03-0.05MPa
Lid agent, and the U.S. alloy pig dried in advance is put into crucible, a certain amount of coverture is then sprinkled on U.S. alloy pig again,
Crucible is put into resistance furnace, and is passed through protective gas, temperature control is incubated 0.5-0.6 hours, blowing out is extremely at 700-750 DEG C
Pouring temperature 680, takes the slag on molten metal surface off, is poured into a mould, and after casting complete, coverture is sprinkled on pouring cup, is treated
Unpacked after cooled and solidified, cut off rising head and spray painting, obtain casting；
S6：Differential arc oxidation：Casting is cleaned 2-4 minutes with deionized water, anode aluminum steel is connected with casting, and stainless steel plate does negative electrode
Immerse in electrolyte, bath composition is：6g/LNa2SiO3, 2g/LNaF and 2g/LNaOH add suitable quantity of water and stir, PH
Value control is 7, and the reaction time was controlled at 8-12 minutes, and current density 3A/d ㎡, frequency is 300Hz, and dutycycle is 45%, reaction
After end, casting is taken out in power-off, rinses drying 10-20 minutes, can both obtain top layer and be attached with one layer of fine and close AL2O3Oxidation
The magnesium alloy for cabinet of speed changer casting of film.
2. a kind of manufacture method of the magnesium alloy for cabinet of speed changer of superpower corrosion resistance according to claim 1, its feature
It is：It is uniform in the step S3 to spread three times mullite sand, first pass mullite fineness of sand 20-50 mesh, second time is mullite
Fineness of sand 15-45 mesh, the 3rd time mullite fineness of sand 10-30 mesh.
3. a kind of manufacture method of the magnesium alloy for cabinet of speed changer of superpower corrosion resistance according to claim 1, its feature
It is：Crucible in the step S5 is steel crucibles.
4. a kind of manufacture method of the magnesium alloy for cabinet of speed changer of superpower corrosion resistance according to claim 1, its feature
It is：Coverture in the step S5 is MgCl2And CaF2Mixture.
5. a kind of manufacture method of the magnesium alloy for cabinet of speed changer of superpower corrosion resistance according to claim 1, its feature
It is：Protective gas composition in the step S5 is CO2And 0.3%SF6.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107838402A (en) * | 2017-11-16 | 2018-03-27 | 中国科学院长春应用化学研究所 | A kind of manufacture method of complicated magnesium alloy structural part |
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|---|---|---|---|---|
| CN107838402A (en) * | 2017-11-16 | 2018-03-27 | 中国科学院长春应用化学研究所 | A kind of manufacture method of complicated magnesium alloy structural part |
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Application publication date: 20171003 |