CN1944702A - Process for solidifying fine crystal under built-in chilling and oscillation action - Google Patents
Process for solidifying fine crystal under built-in chilling and oscillation action Download PDFInfo
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- CN1944702A CN1944702A CN 200610029237 CN200610029237A CN1944702A CN 1944702 A CN1944702 A CN 1944702A CN 200610029237 CN200610029237 CN 200610029237 CN 200610029237 A CN200610029237 A CN 200610029237A CN 1944702 A CN1944702 A CN 1944702A
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Abstract
The solidifying and crystal fining process under the actions of inside chilling and oscillating belongs to the field of metal working technology. The present invention features that the aluminum block is first smelted at 760-780 deg.c and then cast into special sand mold with upper U-shaped cooling water tube soaked in the aluminum melt inside the sand mold and outer extending part connected to a spring on the micro vibration motor. The micro vibration motor applying vibration to the system has input voltage of 220-380 V and vibration frequency of 1-3 kHz; and the cooling water has pressure of 0.6-0.7 MPa, inlet temperature of 25 deg.c, and outlet temperature of 45deg.c. The process can obtain aluminum metal block with great amount of fine crystals.
Description
Technical field
The present invention relates to the process for solidifying fine crystal under a kind of built-in chilling and the vibration acting in conjunction, belong to metal processing treatment Technology field.
Background technology
At present, be used for the thin brilliant processing method of metal freezing both at home and abroad and have two kinds: a kind of is by external energy, as adds physical field, comprises induction stirring, pulsed current, ultrasonic wave, mechanical vibration; A kind of is by external heterogeneous crystallization nuclei, gives birth to the nuclear treatment process as chemical treatment technology, micro-area composition disturbance.Although above-mentioned processing mode has all obtained tangible thinning effect, yet adding physical field needs special equipment and technology.With add the physical field treatment process different be, chemical treatment method and add not only cost height of foreign matter technology, complex process, and the foreign matter particle may impel to be mingled with and increase, thereby caused pollution, shortcomings such as material plasticity reduction.
After the metal solidification texture refinement, can impel tissue and chemical cost evenly, hot cracking tendency reduces, the macrosegregation phenomenon reduces, thereby its mechanical property is improved.Therefore, crystal grain thinning is one of main contents of metal material processing research always.
Summary of the invention
The purpose of this invention is to provide the process for solidifying fine crystal under a kind of built-in chilling and the vibration combined action.Another object of the present invention provides a kind of free of contamination environment-friendly metal solidified structure refinement novel process.
Process for solidifying fine crystal under a kind of built-in chilling of the present invention and the vibration acting in conjunction is characterized in that having following technological process and step:
A. aluminium content is positioned over resistance furnace internal heating melting to 760～780 ℃ greater than 99.6% commercial-purity aluminium aluminium block, is incubated and comes out of the stove after 0.5 hour;
B. in the time of 740～750 ℃, aluminum melt is cast in the specific sand mold; The top of this sand mold is provided with a U-shaped water-cooled tube, and its outside extending area is connected with little spring that shakes above the motor; The U-shaped water-cooled tube immerses in the interior aluminum melt of sand mold; Opening power makes little motor that shakes apply vibration to this system; Input voltage is 220～380V, and the motor oscillating frequency is 1～3kHz; The hydraulic pressure of water coolant is 0.6～0.7MPa, and cooling water inlet temperature is 25 ℃, and temperature out is 45 ℃;
C. said process was handled after 2～3 hours, and progressively cooling is solidified molten aluminium, and final acquisition contains a large amount of thin brilliant aluminium gold genotype pieces that coagulate.
The used isolated plant of process for solidifying fine crystal under a kind of built-in chilling of the present invention and the vibration acting in conjunction, it includes U-shaped water-cooled tube, spring, little motor and model of shaking, it is characterized in that: the top that can hold the model of metal melt is provided with a U-shaped water-cooled tube, and the outside extending area of U-shaped water pipe is connected with little spring that shakes above the motor; The U-shaped water-cooled tube immerses in the interior metal melt of model; The material of U type water-cooled tube is the alloy copper pipe that contains chromium and zirconium; The input voltage of little motor that shakes is 220～380V, and its vibrational frequency is 1～3kHz.
Characteristics of the present invention are: adopt a kind of new built-in water-cooling oscillation device, form crystallization nuclei by Quench, and cause coming off, drift about and breeding of filament crystal core by vibration, change melt internal liquid flow field and temperature field simultaneously, obtain ideal solidifying fine crystal tissue, to change the performance of material.
Under common curing condition, have only a spot of elementide as the forming core core, the crystal grain that obtains is thicker; And when under the Quench condition, all as effectively forming core core existence, under little vibration and metal melt mobile condition, these cores come off, drift about and breed a large amount of elementides simultaneously, obtained a large amount of free crystal grain, thereby made metal melt be able to solidifying fine crystalization.Also avoided simultaneously the defective of center segregation.
The present invention is a kind of edge look free of contamination environment-friendly type treatment process, also can not pollute material itself simultaneously, has both improved the reuse of material, has reduced carrying capacity of environment again.Technology of the present invention is simple, and is easy to operate.The inventive method also is applicable to the casting of metals such as aluminium alloy, copper and copper alloy, magnesium and magnesium alloy.
Description of drawings
Fig. 1 is for taking out low power optical contrast photo with digital camera among the present invention.Wherein a is not for making the sample that solidifies of Quench oscillation treatment; B is the sample that solidifies through Quench oscillation treatment of the present invention.
Fig. 2 is the isolated plant synoptic diagram of built-in chilling of the present invention with vibration solidifying fine crystal technology.
Wherein digital marker is expressed as follows:
1-U shape water-cooled tube, 2-spring, the little motor that shakes of 3-, 4-model.
Embodiment
After now specific embodiments of the invention being described in.
Embodiment 1
Technological process and step in the present embodiment are as follows:
(1) adopt the chemical ingredients of commercial-purity aluminium aluminium block as follows: (wt%)
Al 〉=99.6%, Cu 0.01%, and Si 0.08%, other trace elements 0.21%.This aluminium block is positioned over resistance furnace internal heating melting to 770 ℃, is incubated and comes out of the stove after 0.5 hour.
In the time of (2) 745 ℃, aluminum melt is cast in the specific sand mold; The top of this sand mold is provided with the U-shaped water-cooled tube, and its outside extending area is connected with little spring that shakes above the motor; The U-shaped water-cooled tube immerses in the interior aluminum melt of sand mold; Opening power makes little motor that shakes apply vibration to this system; Input voltage is 220～380V, and the motor oscillating frequency is 1～3kHz; The hydraulic pressure of water coolant is 0.70MPa, and cooling water inlet temperature is 25 ℃, and temperature out is 45 ℃.
(3) said process was handled after 2 hours, and progressively cooling is solidified molten aluminium, the final aluminium gold genotype piece that obtains to contain a large amount of solidifying fine crystals.
In the foregoing description, the structure of the isolated plant of employing is as described below:
Referring to Fig. 2, this figure is built-in chilling of the present invention and vibration solidifying fine crystal technology isolated plant synoptic diagram.
This device includes a U-shaped water-cooled tube 1, spring 2, little motor 3 and model 4 of shaking; The top that can hold the model 4 of molten aluminium is provided with a U-shaped water-cooled tube 1, and each is connected the outside extending area of two sides of U-shaped water pipe 1 with little spring 2 that shakes above the motor 3; In the aluminum metal melt in the U-shaped water-cooled tube immersion model 4; The material of U-shaped water-cooled tube is the alloy copper pipe (Cr 0.5～1.5%, and Zr 0.08～0.3%, Cu 〉=98%) that contains chromium and zirconium; The input voltage of little motor that shakes is 220～380V, and its vibrational frequency is 1～3kHz.The inner cavity size of model 4 is φ 50 * 110mm.
The low power optical photograph that sample is taken the photograph as shown in fig. 1.Referring to the photo among Fig. 1, wherein a is not for making the solidified aluminum assay map of Quench oscillation treatment; B makes the solidified aluminum assay map through Quench oscillation treatment of the present invention.
Can see from above-mentioned photo, treated aluminium sample has equally distributed solidifying fine crystal, the significantly refinement of its solidified structure; Untreated aluminium sample then has thick columnar grain.Both contrasts are very obvious.
Claims (2)
1. the process for solidifying fine crystal under a built-in chilling and the vibration acting in conjunction is characterized in that having following technological process and step:
A. aluminium content is positioned over resistance furnace internal heating melting to 760～780 ℃ greater than 99.6% commercial-purity aluminium aluminium block, is incubated and comes out of the stove after 0.5 hour;
B. in the time of 740～750 ℃, aluminum melt is cast in the specific sand mold; The top of this sand mold is provided with a U-shaped water-cooled tube, and its outside extending area is connected with little spring that shakes above the motor; The U-shaped water-cooled tube immerses in the interior aluminum melt of sand mold; Opening power makes little motor that shakes apply vibration to this system; Input voltage is 220～380V, and the motor oscillating frequency is 1～3kHz; The hydraulic pressure of water coolant is 0.6～0.7MPa, and cooling water inlet temperature is 25 ℃, and temperature out is 45 ℃;
C. said process was handled after 2～3 hours, and progressively cooling is solidified molten aluminium, the final aluminium gold genotype piece that obtains to contain a large amount of solidifying fine crystals.
2. the used isolated plant of process for solidifying fine crystal under a built-in chilling and the vibration acting in conjunction, it includes U-shaped water-cooled tube 1, spring 2, little motor 3 and model 4 of shaking, it is characterized in that: the top that can hold the model 4 of metal melt is provided with a U-shaped water-cooled tube 1, and the outside extending area of U-shaped water pipe 1 is connected with little spring 2 that shakes above the motor 3; In the metal melt in the U-shaped water-cooled tube immersion model 4; The material of U type water-cooled tube is the alloy copper pipe that contains chromium and zirconium; The input voltage of little motor that shakes is 220～380V, and its vibrational frequency is 1～3kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610029237 CN1944702A (en) | 2006-07-21 | 2006-07-21 | Process for solidifying fine crystal under built-in chilling and oscillation action |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610029237 CN1944702A (en) | 2006-07-21 | 2006-07-21 | Process for solidifying fine crystal under built-in chilling and oscillation action |
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| CN1944702A true CN1944702A (en) | 2007-04-11 |
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| CN 200610029237 Pending CN1944702A (en) | 2006-07-21 | 2006-07-21 | Process for solidifying fine crystal under built-in chilling and oscillation action |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102240778A (en) * | 2011-07-03 | 2011-11-16 | 湖北庚联耐磨材料科技有限公司 | Lost wax shell-based negative pressure dry sand and iron shot chilling vibrational casting process method |
| CN115821091A (en) * | 2022-12-14 | 2023-03-21 | 四川越创铝业有限公司 | Aluminum alloy preparation method and aluminum alloy casting device |
-
2006
- 2006-07-21 CN CN 200610029237 patent/CN1944702A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102240778A (en) * | 2011-07-03 | 2011-11-16 | 湖北庚联耐磨材料科技有限公司 | Lost wax shell-based negative pressure dry sand and iron shot chilling vibrational casting process method |
| CN115821091A (en) * | 2022-12-14 | 2023-03-21 | 四川越创铝业有限公司 | Aluminum alloy preparation method and aluminum alloy casting device |
| CN115821091B (en) * | 2022-12-14 | 2024-02-06 | 四川越创铝业有限公司 | Aluminum alloy preparation method and aluminum alloy casting device |
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