CN101812649B - Method for controlling variable quantity of grain refining capability of aluminum-titanium-carbon alloy during pressure processing of aluminum-titanium-carbon alloy - Google Patents
Method for controlling variable quantity of grain refining capability of aluminum-titanium-carbon alloy during pressure processing of aluminum-titanium-carbon alloy Download PDFInfo
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- CN101812649B CN101812649B CN2010101100511A CN201010110051A CN101812649B CN 101812649 B CN101812649 B CN 101812649B CN 2010101100511 A CN2010101100511 A CN 2010101100511A CN 201010110051 A CN201010110051 A CN 201010110051A CN 101812649 B CN101812649 B CN 101812649B
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Abstract
The invention provides a method for controlling the variable quantity of the grain refining capability of aluminum-titanium-carbon alloy during pressure processing of the aluminum-titanium-carbon alloy, which comprises the following steps: firstly, establishing the function relationship of the variable quantity delta AA of the grain refining capability of the aluminum-titanium-carbon alloy and the processing parameters D, V, delta T and n in the pressure processing process of the aluminum-titanium-carbon alloy; and then, precisely controlling the variable quantity delta AA of the grain refining capability of the aluminum-titanium-carbon alloy through coordinating and regulating the processing parameters D, V, delta T and n. The invention overcomes the defect that the technical parameters can not be quantitatively optimized in the traditional pressure processing process of the aluminum-titanium-carbon alloy. The invention proves that the variable quantity of the grain refining capability of the aluminum-titanium-carbon alloy can be precisely controlled through controlling the processing parameters. When the grain refining capability value AA before the pressure processing of the aluminum-titanium-carbon alloy is fixed, the larger the variable quantity of the grain refining capability of the aluminum-titanium-carbon alloy is, the smaller the grain refining capability value AA after the pressure processing of the aluminum-titanium-carbon alloy is, and the stronger the capability of the aluminum-titanium-carbon alloy for refining aluminum and aluminum alloy grains is.
Description
[technical field]
The present invention relates to the complete processing of metallic substance, particularly control the method for the variable quantity of its grain refining capability during press working aluminium titanium carbon alloy.
[background technology]
Aluminium titanium carbon alloy is generally to use in the aluminum profile extrusion in the global range and the most effective master alloy of refinement aluminium and aluminum alloy solidification crystal grain.The grain refining capability of aluminium titanium carbon alloy is one of important factor of decision aluminium processing material quality quality; The grain refining capability of aluminium titanium carbon alloy is high more; Then the ys of aluminium processing material is high more, calendering plasticity is good more, ductile-brittle transition temperature is low more; Otherwise aluminium processing material quality is poor more, and this point is reflected more clearly when aluminium processing material is applied on the aerospace.For this reason; The manufacturing enterprise of each aluminium titanium carbon alloy and research institution are all in the research of strengthening grain refinement capability of TiAl carbon alloy energetically; Association of Alcoa is special stipulation grain refining capability value AA (hereinafter to be referred as the AA value) also; The AA value is the quantitative value of tolerance grain refinement capability of TiAl carbon alloy height; The ability of the more little expression aluminium of AA value titanium carbon alloy refinement aluminium and duraluminum crystal grain is strong more, and the crystal grain that promptly adds the aluminium processed behind the more little aluminium titanium carbon alloy of AA value and duraluminum is tiny more, the AA value by at first 250 reduce to 170 gradually.In the existing aluminium titanium carbon alloy processing technology, generally pay attention to the research of aspects such as material component, melting technology, and ignored the quality control of aluminium titanium carbon alloy in the rolling pressure course of processing; Press working comprises that mill milling and casting and extruding machine push two kinds; Think unilaterally that at present press working do not have influence to the grain refining capability of aluminium titanium carbon alloy; Do not know ratio that is the compression ratio of sectional area before and after the press working, the relation of the temperature difference, egress line speed, frame number and grain refinement capability of TiAl carbon alloy variable quantity before and after the press working yet; The temperature difference before and after just control pressure is processed by rule of thumb before and after the ratio of sectional area that is compression ratio, the press working etc., but the technological method of a cover quantitative optimization control set up.
[summary of the invention]
The present invention provides a kind of and adopts temperature head, egress line speed, frame before and after the ratio of coordinating sectional area before and after the adjustment aluminium titanium carbon alloy press working that is compression ratio, the press working to count the equipressure machined parameters; Thereby accurately control the method for the variable quantity of grain refinement capability of TiAl carbon alloy, solve exist at present can not be quantitatively and the technical problem of the variation of the problem of optimal control aluminium titanium carbon alloy press working parameter and the grain refinement capability of TiAl carbon alloy that brings thus.
The present invention solves the technical scheme that existing technical problem adopts: control the method for the variable quantity of its grain refining capability when a kind of press working aluminium titanium carbon alloy is provided, said method comprises:
A. at first set up the funtcional relationship of machined parameters in variation delta AA and the aluminium titanium carbon alloy press working process of grain refinement capability of TiAl carbon alloy, that is:
ΔAA＝K·D·V÷(ΔT·n)
Δ AA=AA wherein
1-AA
2, AA
1Be the grain refining capability value before the aluminium titanium carbon alloy press working, AA
2Be the grain refining capability value after the aluminium titanium carbon alloy press working, K is a constant, and D is the ratio that is the compression ratio of sectional area before and after the aluminium titanium carbon alloy press working,
S
1Be the sectional area before the aluminium titanium carbon alloy press working, S
2Be the sectional area after the aluminium titanium carbon alloy press working, Δ T is the temperature head before and after the aluminium titanium carbon alloy press working, and V is an egress line speed, and n is the frame number;
B. through coordinating adjustment machined parameters D, V, Δ T and n variation delta AA with accurate control grain refinement capability of TiAl carbon alloy.
An international standard is arranged in the manufacturing of aluminium titanium carbon alloy, and promptly the diameter of the aluminium titanium carbon alloy product of final output is 9.5mm, and promptly sectional area is 70.8mm
2Said funtcional relationship: Δ AA=KDV ÷ (Δ Tn) can be applied in and also can be applied in the casting and extruding machine of making aluminium titanium carbon alloy in the milling train of making aluminium titanium carbon alloy; Said funtcional relationship had both met the calculating of single-rack; Also meet total calculating of a plurality of frames, also meet the calculating of last frame in a plurality of frames simultaneously.
The present invention's improvement further is said 1m/s≤V≤30m/s.
Compared to prior art; The invention has the beneficial effects as follows: the present invention overcome in the conventional aluminum titanium carbon alloy press working process can not the quantitative optimization technical parameter defective; Proof can accurately be controlled the variable quantity of grain refinement capability of TiAl carbon alloy to the control of machined parameters; The variable quantity of grain refining capability is big more; Grain refining capability value AA one timing before aluminium titanium carbon alloy press working, then the grain refining capability value AA after the aluminium titanium carbon alloy press working is more little, and the ability of aluminium titanium carbon alloy refinement aluminium and duraluminum crystal grain is just strong more.
[description of drawings]
Fig. 1 controls the structural representation of continuous casting and rolling process for production of method of the variable quantity of its grain refining capability during for applying pressure of the present invention processing aluminium titanium carbon alloy;
The continuous casting of method that Fig. 2 controls the variable quantity of its grain refining capability during for applying pressure of the present invention processing aluminium titanium carbon alloy connects the structural representation that squeezes production technique;
Fig. 3 controls the single chassis structural representation of milling train of method of the variable quantity of its grain refining capability during for applying pressure of the present invention processing aluminium titanium carbon alloy;
Fig. 4 controls the structural representation of casting and extruding machine of method of the variable quantity of its grain refining capability during for applying pressure of the present invention processing aluminium titanium carbon alloy.
Relevant toponym is among Fig. 1 to Fig. 4: crucible 10, crystallizing wheel 20, milling train 30, roll 31, casting and extruding machine 40, quench liquid 50.
[embodiment]
This case applicant reaches a conclusion after groping through long-term experiment, and in aluminium titanium carbon alloy press working process, the press working parameter will directly have influence on the grain refining capability of aluminium titanium carbon alloy.For this reason; The applicant connects the equipment of squeezing through the self-produced continuous casting of import continuous casting and rolling equipment, applicant self-produced continuous casting and rolling equipment, applicant and experimentizes, and finds out the relation between the variation delta AA of press working parameter and grain refinement capability of TiAl carbon alloy; The part experimental data tabulation that below in experiment, obtains for the applicant:
Table 1
| 980 | 70.8 | 13.8 | 4 | 6 | 7 | 15.2 | 170 | 155 |
| 980 | 70.8 | 13.8 | 4 | 6 | 8 | 13.3 | 170 | 157 |
| 980 | 70.8 | 13.8 | 4 | 6 | 9 | 11.8 | 170 | 158 |
| 980 | 70.8 | 13.8 | 4 | 6 | 10 | 10.7 | 170 | 159 |
| 980 | 70.8 | 13.8 | 5 | 9 | 7 | 18.3 | 170 | 152 |
| 980 | 70.8 | 13.8 | 5 | 9 | 8 | 16.0 | 170 | 154 |
| 980 | 70.8 | 13.8 | 5 | 9 | 9 | 14.2 | 170 | 156 |
| 980 | 70.8 | 13.8 | 5 | 9 | 10 | 12.8 | 170 | 157 |
| 1200 | 70.8 | 16.9 | 3 | 3 | 7 | 12.4 | 170 | 158 |
| 1200 | 70.8 | 16.9 | 3 | 3 | 8 | 10.9 | 170 | 159 |
| 1200 | 70.8 | 16.9 | 3 | 3 | 9 | 9.7 | 170 | 160 |
| 1200 | 70.8 | 16.9 | 3 | 3 | 10 | 8.7 | 170 | 161 |
| 1200 | 70.8 | 16.9 | 4 | 6 | 7 | 18.6 | 170 | 151 |
| 1200 | 70.8 | 16.9 | 4 | 6 | 8 | 16.3 | 170 | 154 |
| 1200 | 70.8 | 16.9 | 4 | 6 | 9 | 14.5 | 170 | 156 |
| 1200 | 70.8 | 16.9 | 4 | 6 | 10 | 13.0 | 170 | 157 |
| 1200 | 70.8 | 16.9 | 5 | 9 | 7 | 22.4 | 170 | 148 |
| 1200 | 70.8 | 16.9 | 5 | 9 | 8 | 19.6 | 170 | 150 |
| 1200 | 70.8 | 16.9 | 5 | 9 | 9 | 17.4 | 170 | 153 |
| 1200 | 70.8 | 16.9 | 5 | 9 | 10 | 15.7 | 170 | 154 |
| 1400 | 70.8 | 19.8 | 4 | 6 | 10 | 15.2 | 170 | 155 |
| 1400 | 70.8 | 19.8 | 5 | 9 | 10 | 18.3 | 170 | 152 |
In the manufacturing of aluminium titanium carbon alloy, an international standard is arranged, promptly the diameter of the aluminium titanium carbon alloy product of final output is 9.5mm, is that sectional area is 70.8mm
2The experimental data of table 1 for using continuous casting and rolling equipment to draw, continuous casting and rolling equipment comprise that refrigerating module, the refrigerating module of the aluminium titanium carbon alloy in milling train 30, the cooling pressure course of processing comprise the thermoscope that detects aluminium titanium carbon alloy press working front and back temperature.Two rolls 31 of aluminium titanium carbon alloy through milling train 30 cooperate milling trains to accomplish press working, aluminium titanium carbon alloy press working forward and backward with the press working process in all be solid-state.In press working, exist two temperature nodes, promptly before the pressurized and behind the decompress(ion); In the press working process of milling train 30; Instantaneous temperature and the input temp approximately equal of aluminium titanium carbon alloy before pressurized; Instantaneous temperature behind the decompress(ion) and output temperature approximately equal, therefore, it is comparatively convenient on milling train 30, to detect the forward and backward temperature of aluminium titanium carbon alloy press working at 2.
Fig. 1 is the structural representation of application through the continuous casting and rolling process for production of the method for the variable quantity of control compression ratio control grain refinement capability of TiAl carbon alloy; The aluminium titanium carbon alloy melt that comes out from crucible 10 forms aluminium titanium carbon alloy rod through crystallizing wheel 20, and bar-shaped then aluminium titanium carbon alloy gets into milling train 30 press working.The frame of milling train 30 is counted n can be 3,4,5,6,7,8,9,10.As shown in Figure 1, it is 10 that the frame in the milling train 30 is counted n.As shown in Figure 3, the roll 31 in the milling train 30 can bear the sectional area S before the aluminium titanium carbon alloy press working
1, and can regulate roll 31 and make and satisfy the sectional area S after the aluminium titanium carbon alloy press working
2Thermoscope has two at least; Detect the forward and backward temperature of aluminium titanium carbon alloy rolling pressure processing respectively; Temperature before the aluminium titanium carbon alloy press working is 300-450 ℃; Aluminium titanium carbon alloy can raise through milling train 30 back temperature, refrigerating module spray quench liquid the roll 31 of milling train 30 with rolling in aluminium titanium carbon alloy on; Flow through controlled chilling liquid 50 makes the temperature head Δ T before and after the aluminium titanium carbon alloy press working be controlled at a reasonable range, and quench liquid 50 can be a water; After coming out from milling train 30, last aluminium titanium carbon alloy forms aluminium titanium carbon alloy bar.
Use the experimental data that continuous casting and rolling equipment draws from table 1, the applicant through the funtcional relationship between the variation delta AA of the press working parameter that obtains after studying repeatedly and summing up and grain refinement capability of TiAl carbon alloy is: Δ AA=KDV ÷ (Δ Tn)
Δ AA=AA wherein
1-AA
2, AA
1Be the grain refining capability value before the aluminium titanium carbon alloy press working, AA
2Be the grain refining capability value after the aluminium titanium carbon alloy press working, K is a constant, and drawing K through table 1 numerical evaluation is 5.13, and D is the ratio that is the compression ratio of sectional area before and after the aluminium titanium carbon alloy press working,
S
1Be the sectional area before the aluminium titanium carbon alloy press working, S
2Be the sectional area after the aluminium titanium carbon alloy press working; Δ T is the temperature head before and after the aluminium titanium carbon alloy press working, and V is an egress line speed, and Δ T and V have funtcional relationship: V=3 Δ T-6; The peak that V>=1m/s and egress line speed V can reach at present is 30m/s, and n is the frame number.
Said funtcional relationship: Δ AA=KDV ÷ (Δ Tn) meets total calculating of a plurality of frames of milling train, also meets the calculating of the single-rack of milling train, as meets the calculating of last frame of milling train; When n=1, must refer to the calculating of last frame, the sectional area of the aluminium titanium carbon alloy product of exporting in last frame is 70.8mm
2
Table 2
An international standard is arranged in the manufacturing of aluminium titanium carbon alloy, and promptly the diameter of the aluminium titanium carbon alloy product of final output is 9.5mm, and promptly sectional area is 70.8mm
2Table 2 connects the experimental data that the equipment of squeezing draws for the self-produced continuous casting of request for utilization people.Continuous casting connects the equipment of squeezing and comprises that refrigerating module, the refrigerating module of the aluminium titanium carbon alloy in casting and extruding machine 40, the cooling pressure course of processing comprise the thermoscope that detects aluminium titanium carbon alloy press working front and back temperature.Aluminium titanium carbon alloy is through the inner completion of the roller press working at casting and extruding machine 40, and aluminium titanium carbon alloy is forward and backward in press working to be solid-state, in the press working process, is semi-solid state.In press working, exist two temperature nodes, promptly before the pressurized and behind the decompress(ion); In the press working of casting and extruding machine 40; The instantaneous temperature of aluminium titanium carbon alloy before pressurized is the temperature of the focus that rubbed; Instantaneous temperature behind the decompress(ion) is the temperature when casting and extruding machine 40 is extruded; Therefore, note on casting and extruding machine 40, detecting the accuracy of the forward and backward temperature of aluminium titanium carbon alloy press working at 2.
Fig. 2 is application connects crowded production technique through the continuous casting of the method for the variable quantity of control compression ratio control grain refinement capability of TiAl carbon alloy a structural representation; The aluminium titanium carbon alloy melt that comes out from crucible 10 forms aluminium titanium carbon alloy rod through crystallizing wheel 20; Bar-shaped then aluminium titanium carbon alloy is through the press working of casting and extruding machine 40; The frame of casting and extruding machine 40 is counted n and is illustrated in figure 2 as 1, and is as shown in Figure 4, and casting and extruding machine 40 can bear the sectional area S before the aluminium titanium carbon alloy press working
1, and can regulate and make and to satisfy the sectional area S after the aluminium titanium carbon alloy press working
2Thermoscope has two at least, detects the forward and backward temperature of aluminium titanium carbon alloy press working respectively; Aluminium titanium carbon alloy can raise and makes aluminium titanium carbon alloy be the semi-fluid attitude through add the man-hour temperature 40 li of casting and extruding machines; It is inner to the roller of casting and extruding machine 40 that refrigerating module sprays quench liquid; Flow through controlled chilling liquid makes the temperature head Δ T before and after the aluminium titanium carbon alloy press working be controlled at a reasonable range, and quench liquid can be a water; Last aluminium titanium carbon alloy is extruded from casting and extruding machine 40 and is formed aluminium titanium carbon alloy bar.
Use continuous casting to connect the experimental data that the equipment of squeezing draws from table 2, the applicant through the funtcional relationship between the variation delta AA of the press working parameter that obtains after studying repeatedly and summing up and grain refinement capability of TiAl carbon alloy is: Δ AA=KDV ÷ (Δ Tn)
Δ AA=AA wherein
1-AA
2, AA
1Be the grain refining capability value before the aluminium titanium carbon alloy press working, AA
2Be the grain refining capability value after the aluminium titanium carbon alloy press working, K is a constant, and drawing K through table 1 numerical evaluation is 5.13; D is the ratio that is the compression ratio of sectional area before and after the aluminium titanium carbon alloy press working,
S
1Be the sectional area before the aluminium titanium carbon alloy press working, S
2Be the sectional area after the aluminium titanium carbon alloy press working, Δ T is the temperature head before and after the aluminium titanium carbon alloy press working, and V is an egress line speed, and n is the frame number, n=1.
Said funtcional relationship: Δ AA=KDV ÷ (Δ Tn) meets the calculating of the single-rack of casting and extruding machine, when n=1, must refer to the calculating of last frame, and the sectional area of output aluminium titanium carbon alloy product is 70.8mm in last frame
2
Thus; The applicant has found the method for accurately controlling the variable quantity of grain refinement capability of TiAl carbon alloy in this press working; This method comprises: at first set up the funtcional relationship of machined parameters D, V, Δ T and n in variation delta AA and the aluminium titanium carbon alloy press working process of grain refinement capability of TiAl carbon alloy, then through coordinating adjustment machined parameters D, V, Δ T and the n variation delta AA with accurate control grain refinement capability of TiAl carbon alloy.
The present invention overcome in the conventional aluminum titanium carbon alloy press working process can not the quantitative optimization technical parameter defective; Proof can accurately be controlled the variable quantity of grain refinement capability of TiAl carbon alloy to the control of machined parameters; The variable quantity of grain refining capability is big more; Grain refining capability value AA one timing before aluminium titanium carbon alloy press working, then the grain refining capability value AA after the aluminium titanium carbon alloy press working is more little, and the ability of aluminium titanium carbon alloy refinement aluminium and duraluminum crystal grain is just strong more.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (2)
1. control the method for the variable quantity of its grain refining capability during a press working aluminium titanium carbon alloy, it is characterized in that: said method comprises:
A. at first set up the funtcional relationship of machined parameters in variation delta AA and the aluminium titanium carbon alloy press working process of grain refinement capability of TiAl carbon alloy, that is:
ΔAA＝K·D·V÷(ΔT·n)
Wherein K is a constant,
S
1Be the sectional area before the aluminium titanium carbon alloy press working, S
2Be the sectional area after the aluminium titanium carbon alloy press working, Δ T is the temperature head before and after the aluminium titanium carbon alloy press working, and V is an egress line speed, and n is the frame number;
B. through coordinating adjustment machined parameters D, V, Δ T and n variation delta AA with accurate control grain refinement capability of TiAl carbon alloy.
2. control the method for the variable quantity of its grain refining capability during press working aluminium titanium carbon alloy according to claim 1, it is characterized in that: said 1m/s≤V≤30m/s.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4612073A (en) * | 1984-08-02 | 1986-09-16 | Cabot Corporation | Aluminum grain refiner containing duplex crystals |
| CN1544678A (en) * | 2003-11-20 | 2004-11-10 | 上海交通大学 | In-situ synthesized TiC-AI composite ultra-fine grain refining agent and process for preparing same |
| CN1847423A (en) * | 2005-10-21 | 2006-10-18 | 兰州理工大学 | Prepn process of composite Al-Ti-C grain refining agent for aluminium and aluminium alloy |
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2010
- 2010-02-05 CN CN2010101100511A patent/CN101812649B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4612073A (en) * | 1984-08-02 | 1986-09-16 | Cabot Corporation | Aluminum grain refiner containing duplex crystals |
| CN1544678A (en) * | 2003-11-20 | 2004-11-10 | 上海交通大学 | In-situ synthesized TiC-AI composite ultra-fine grain refining agent and process for preparing same |
| CN1847423A (en) * | 2005-10-21 | 2006-10-18 | 兰州理工大学 | Prepn process of composite Al-Ti-C grain refining agent for aluminium and aluminium alloy |
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