Preparation method for ADC12 alloy semi-solid blank
Technical field
The present invention relates to a kind of preparation methods, more particularly, to a kind of preparation side for ADC12 alloy semi-solid blank
Method belongs to non-ferrous metal forging and stamping manufacturing technology field.
Background technique
ADC12 alloy has fabulous casting character and comprehensive mechanical property, is highly suitable for high-pressure casting molding, is vapour
One of most widely used alloy in vehicle field.But since ingredient is close to al-si eutectic point, apparent viscosity is lower under molten state, pressure
It is easy volume gas in type casting moulding, is mingled with, causes casting compactness to decline, cannot further be heat-treated raising mechanical property.
Semi-solid processing forming technique be use microstructure for subsphaeroidal crystal grain be suspended in the semi-solid blank of liquid phase into
The molding technique of row.The semi-solid blank of subsphaeroidal solid phase exponentially declines with the increase apparent viscosity of shear rate, so that
Forming process slurry fluid stable, forming force are low, volume gas, be mingled with it is less.The key of the forming technique, which is to be prepared, to be had
The semi-solid blank of bulb tissue.It, can be by carrying out mechanical stirring or electricity in alloy solid-liquid two-phase temperature range under normal condition
The Strong shears effect such as magnetic stirring obtains spheroidal structure, but only about 10 DEG C of ADC12 alloy solid-liquid temperature range to be crushed dendrite, it is difficult to
Stable batch machining is carried out by traditional approach.
Summary of the invention
The technical problems to be solved by the present invention are: providing a kind of spheroidal structure that can be effectively controlled ADC12 alloy, realize
ADC12 alloy stablizes the preparation method for ADC12 alloy semi-solid blank of batch machining.
Used technical solution is to solve above-mentioned technical problem: a kind of system for ADC12 alloy semi-solid blank
Preparation Method, the preparation method is based on the predeformation ADC12 alloy after alloy grain breaking deformation, after isothermal processes
The ADC12 alloy semi-solid blank is obtained by water cooled copper mould pressurization or water quenching.
Further, dicing treatment is first carried out before carrying out at isothermal to predeformation ADC12 alloy, the pre- change after stripping and slicing
The volume for the ADC12 alloy semi-solid blank that the volume and needs of shape ADC12 alloy obtain is adapted.
The preferred mode of the above solution is that carrying out isothermal processes again after the completion of stripping and slicing, the design parameter of isothermal processes is,
Between 480 DEG C~550 DEG C, soaking time requires to select isothermal treatment temperatures interval selection according to corresponding solid rate
Between 10~500min.
Further, the use forging method for the predeformation ADC12 alloy that alloy grain is crushed obtains.
The preferred mode of the above solution is that the forging and stamping when forging obtains the broken predeformation ADC12 alloy of alloy grain
Than between 2~4.
The preferred mode of the above solution is that forging and stamping temperature control is between 200-300 DEG C.
The beneficial effects of the present invention are: the application is based on the predeformation ADC12 alloy after alloy grain breaking deformation,
The ADC12 alloy semi-solid blank is obtained by water cooled copper mould pressurization or water quenching after isothermal processes.In the above-mentioned of the application
In technical solution, due to having isothermal processes and water cooled copper mould pressurization or water quenching, so as to adequately by traditional plastic processing
Technology is used for the preparation of ADC12 alloy semi-solid blank in conjunction with isothermal preservation and controlling technology, on the one hand can overcome the alloy
Solid-liquid temperature range is narrow to be difficult to the shortcomings that liquid is directly processed, on the other hand also can more stable realization continuously prepare, fit
Close batch production.Its principle is that traditional Technology of Plastic Processing is distorted alloy grain, and there are huge distortion for intercrystalline
Can, at a proper temperature heat preservation distortion can be released be easy so that crystal boundary preferentially melt, rounding, thus formed spherical shape
Grain.Above-mentioned technology is exactly adequately utilized in the application, combines both, and both can be effectively controlled the ball of ADC12 alloy
Shape tissue, and ADC12 alloy may be implemented and stablize batch machining.
Detailed description of the invention
Fig. 1 be the present invention relates to ADC12 alloy raw element tree arborescent structure;
Fig. 2 be the present invention relates to ADC12 alloy spherical microstructure of semisolid.
Specific embodiment
In order to solve the above technical problems existing in the prior art, one kind provided by the invention can be effectively controlled ADC12
The spheroidal structure of alloy realizes that ADC12 alloy stablizes the preparation method for ADC12 alloy semi-solid blank of batch machining.
The preparation method passes through water based on the predeformation ADC12 alloy after alloy grain breaking deformation after isothermal processes
Cold copper mold pressurization or water quenching obtain the ADC12 alloy semi-solid blank.The application is with pre- after alloy grain breaking deformation
Based on deforming ADC12 alloy, the ADC12 alloy semi-solid is obtained by water cooled copper mould pressurization or water quenching after isothermal processes
Blank.In the above-mentioned technical proposal of the application, due to having isothermal processes and water cooled copper mould pressurization or water quenching, so as to abundant
The preparation that traditional Technology of Plastic Processing is used for ADC12 alloy semi-solid blank in conjunction with isothermal preservation and controlling technology, one
Aspect can overcome the alloy solid-liquid temperature range is narrow to be difficult to the shortcomings that liquid is directly processed, on the other hand also can be more stable
Realization continuously prepare, it is suitable for mass production.Its principle is that traditional Technology of Plastic Processing is distorted alloy grain, brilliant
There are huge distortion energy for intergranular, and heat preservation distortion, which can be released, at a proper temperature is easy so that crystal boundary preferentially melts, is round
Integralization, to form spheric granules.Above-mentioned technology is exactly adequately utilized in the application, combines both, Ji Nengyou
The spheroidal structure of effect control ADC12 alloy, and ADC12 alloy may be implemented and stablize batch machining.
In above embodiment, in order to control the spheroidal structure of ADC12 alloy to greatest extent, improves plastic processing and walk sequence
Final product quality, the application to predeformation ADC12 alloy carry out isothermal at before first carry out dicing treatment, the predeformation after stripping and slicing
The volume for the ADC12 alloy semi-solid blank that the volume and needs of ADC12 alloy obtain is adapted.Meanwhile also isothermal is kept the temperature
And the parameter of forging and stamping has carried out the control of more refinement matter, specifically: isothermal processes are carried out again after the completion of stripping and slicing, isothermal processes
Design parameter is that between 480 DEG C~550 DEG C, soaking time requires isothermal treatment temperatures interval selection according to corresponding solid rate
Selection is between 10~500min.
Correspondingly, process equipment is simple, at low cost since forging technology is most traditional metal plastic deformation technique
It is honest and clean, with short production cycle, it is very suitable for the predeformation of alloy.Therefore the broken predeformation ADC12 alloy of the application alloy grain
It is obtained using forging method.Ratio of forging reduction when forging obtains the broken predeformation ADC12 alloy of alloy grain is between 2~4;
Temperature control is forged and pressed between 200-300 DEG C.
The present invention combines traditional forging deformation technique and Semi-solid Blank Production, realizes ADC12
The efficient preparation of the effectively controllable semi-solid blank of the high-quality spheroidal structure of alloy, further promotes and applies for the alloy and opens up
New approaches.
The present invention is described in detail combined with specific embodiments below.
Embodiment 1
The present embodiment is related to a kind of preparation method for forging predeformation ADC12 alloy semi-solid blank;The method includes
Following steps:
200 DEG C of ADC12 alloy is subjected to forging predeformation under 2 ratio of forging reduction.Then by the predeformation alloy 480
DEG C heat-treatment furnace keeps the temperature 500min, then quenches in water, then is made the semi-solid blank for having spheroidal structure, it is specific as Fig. 1,
Shown in Fig. 2, Fig. 1 is original dendrite tissue, and Fig. 2 is spherical microstructure of semisolid.
Embodiment 2
The present embodiment is related to a kind of preparation method for forging predeformation ADC12 alloy semi-solid blank;The method includes
Following steps:
300 DEG C of ADC12 alloy is carried out forging predeformation under 3 ratio of forging reduction.Then by the predeformation alloy 550
DEG C heat preservation 10min, is then quickly transferred to copper mold pressurization cooling, is then made and has the semi-solid blank of spheroidal structure.
Embodiment 3
The present embodiment is related to a kind of preparation method for forging predeformation ADC12 alloy semi-solid blank;The method includes
Following steps:
200 DEG C of ADC12 alloys are carried out the open die forging predeformation that forging ratio is about 4 in forging press.Then by the pre- change
Shape alloy keeps the temperature 100min in 500 DEG C of isothermals, is then quickly transferred to cold water quenching, then the semisolid of spheroidal structure is prepared
Blank.