EP2357263B1 - Method for controlling variation of grain refining ability of al-ti-c alloy by controlling compression ratio - Google Patents
Method for controlling variation of grain refining ability of al-ti-c alloy by controlling compression ratio Download PDFInfo
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- EP2357263B1 EP2357263B1 EP10723902.2A EP10723902A EP2357263B1 EP 2357263 B1 EP2357263 B1 EP 2357263B1 EP 10723902 A EP10723902 A EP 10723902A EP 2357263 B1 EP2357263 B1 EP 2357263B1
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- 238000000034 method Methods 0.000 title claims description 84
- 230000006835 compression Effects 0.000 title claims description 25
- 238000007906 compression Methods 0.000 title claims description 25
- 229910045601 alloy Inorganic materials 0.000 title description 7
- 239000000956 alloy Substances 0.000 title description 7
- 238000007670 refining Methods 0.000 title description 2
- 229910001339 C alloy Inorganic materials 0.000 claims description 97
- 239000013078 crystal Substances 0.000 claims description 28
- 238000005096 rolling process Methods 0.000 description 18
- 238000001125 extrusion Methods 0.000 description 13
- 238000005266 casting Methods 0.000 description 12
- 238000001816 cooling Methods 0.000 description 9
- 238000009749 continuous casting Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000012809 cooling fluid Substances 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000274 aluminium melt Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
Definitions
- the present invention relates to processing techniques, especially relates to a method for controlling variations of Al(aluminum)-Ti(titanium)-C(carbon) alloy crystal grain refinement through controlling a ratio of sectional area of Al-Ti-C alloy before press processing to after press processing (namely compression ratio) during a production of the Al-Ti-C alloy.
- Al-Ti-C alloy is much popularly employing in Al material machining as a most efficient preliminary alloy for Al and Al alloy coagulation crystal grain refinement.
- a refinement ability of the Al-Ti-C alloy crystal grain is a very important factor when judging a quality of Al processing material.
- the US aluminum association has specially ruled an AA value to represent the crystal grain refinement ability.
- the AA value is a value that can be used for measuring the Al-Ti-C alloy crystal grain refinement ability, and the lesser the AA value is, the better the refinement ability of the Al-Ti-C alloy is. That is, the lesser AA value that the Al-Ti-C alloy added during Al and Al alloy producing process has, the more refined the crystal grain of the Al and Al alloy are. With a development of the process and refinement technology, the AA value is decreased from 250 at very beginning to 170. Presently, alloy fabrication technology is focused on material components, melting process, and such like. However, a quality control during a press process of the Al-Ti-C alloy has been ignored or indifferent to people.
- the press process includes mill rolling and cast extrusion machine extruding, and many believe that a ratio of the sectional area before press process to that after press process (defined as compression ratio), a variation of temperatures before and after press process, a line speed at exit, and a quantity of the standers have relations with the refinement ability of the Al-Ti-C alloy crystal grain, and there is no quantitative optimal control method for control the refinement ability of the Al-Ti-C alloy crystal grain through these respects including compression ratio.
- compression ratio a ratio of the sectional area before press process to that after press process
- WO 88/09392 discloses a method for the production of master alloys intended for grain refining of aluminium melts wherein it is possible to regulate the properties of the compounds with the aid of several parameters - like reaction temperature, holding times for isothermal treatments, cooling rate to casting temperature, cooling rate during treatment, titanium content, added carbon and nitrogen amounts, - based on theoretical grounds and according to practical experiments.
- One exemplary embodiment of the present invention is a method for controlling variations of Al-Ti-C alloy crystal grain refinement ability through controlling a compression ratio of sectional area of Al-Ti-C alloy including: A. establishing a relationship between variations of refinement ability of Al-Ti-C alloy crystal grain and parameters of press process of the Al-Ti-C alloy; setting the parameters of press process and controlling the variation of the refinement ability of the Al-Ti-C alloy crystal grain through controlling a value of the compression ratio.
- the continuous casting and tandem rolling machines includes a rolling mill 30 and a cooling module for Al-Ti-C alloy during a cooling press process.
- the cooling module includes a temperature sensor for detecting a temperature before the press process of the Al-Ti-C alloy and a temperature after the press process of the Al-Ti-C alloy.
- the press process of the Al-Ti-C alloy is completed through a cooperation of two rollers 31 of the rolling mill 30, and the Al-Ti-C alloy maintains solid state before, after, and during the press process.
- an instantaneous temperature of the Al-Ti-C alloy is about the same as an input temperature, and after the pressure being released, an instantaneous temperature of Al-Ti-C alloy is about the same as an output temperature, therefore it is convenient to detect temperatures of the two points.
- Al-Ti-C alloy melt is put into a crystallize wheel 20 from a crucible 10 thereby forming an Al-Ti-C alloy bar. Thereafter, the bar-shaped Al-Ti-C alloy is put into the rolling mill 30 to conduct press process.
- An amount of standers of the rolling mill 30 could be 3, 4, 5, 6, 7, 8, 9 or 10. In the illustrated embodiment as shown in FIG 1 , an amount of standers of the rolling mill 30 is 10.
- FIG. 3 one stand of the rolling mill 30 is shown in enlarged view. The two rollers 31 of the rolling mill 30 are rolling inward and toward each other. S 1 is denoted for the sectional area before press process, and S 2 is denoted for the sectional area after the press process.
- the temperature sensors are configured to detect the temperature of the Al-Ti-C alloy before the press process and the temperature of the Al-Ti-C alloy after the press process.
- a scope of temperatures of the Al-Ti-C alloy before the press process is between 300°C-450 °C.
- the temperature of the Al-Ti-C alloy is raised when being processed in the rolling mill 30.
- the cooling module is configured for spraying cooling fluid 50 onto the rollers 31 of the rolling mill 30. By controlling a flow rate of the cooling fluid 50, a temperature difference ⁇ T of the Al-Ti-C alloy before the press process and after the press process can be controlled within a proper range.
- the cooling fluid 50 can be water.
- the Al-Ti-C alloy comes out from the rolling mill 30 and forms an Al-Ti-C alloy rod.
- K is a constant and can be calculated according the data of table 1 to be 5.13.
- ⁇ T represents a temperature variation of the Al-Ti-C alloy before the press process and after the press process.
- N represents the number of the standers of the rolling mill 30.
- the press process parameters including temperature variation ⁇ T, line speed of the outlet V, and the amount of the standers are normally fixed, and through controlling on the compression ratio of the press process of the Al-Ti-C alloy, the refinement ability variation ⁇ AA can be controlled precisely.
- the continuous casting and continuous extruding machines includes a casting extrusion machine 40 and a cooling module for Al-Ti-C alloy during a cooling press process.
- the press process of the Al-Ti-C alloy is competed in a roller of the casting extrusion machine 40.
- the Al-Ti-C alloy maintains solid state before, after, and during the press process.
- an instantaneous temperature of the Al-Ti-C alloy is about the same as an friction heat temperature
- an instantaneous temperature of Al-Ti-C alloy is about the same as an temperature outputted from the casting extrusion machine 40, therefore it is convenient to detect temperatures of the two points.
- Al-Ti-C alloy melt is put into a crystallize wheel 20 from a crucible 10 thereby forming an Al-Ti-C alloy bar. Thereafter, the bar-shaped Al-Ti-C alloy is put into the casting extrusion machine 40 to conduct press process.
- Al-Ti-C alloy melt is put into a crystallize wheel 20 from a crucible 10 thereby forming an Al-Ti-C alloy bar. Thereafter, the bar-shaped Al-Ti-C alloy is put into the casting extrusion machine 40 to conduct press process.
- An amount of the standers of the casting extrusion machine 40 is as shown in FIG 2 .
- S 1 is denoted for the sectional area before press process
- S 2 is denoted for the sectional area after the press process.
- the temperature of the Al-Ti-C alloy is raised when being processed in the casting extrusion machine 40 and the Al-Ti-C alloy is altered into semifluid.
- the cooling module spraying cooling fluid into the casting extrusion machine 40. By controlling a flow rate of the cooling fluid, a temperature difference ⁇ T of the Al-Ti-C alloy before the press process and after the press process can be controlled within a proper range.
- the cooling fluid can be water.
- the Al-Ti-C alloy comes out from the casting extrusion machine 40 and forms an Al-Ti-C alloy rod.
- ⁇ AA AA 1 - AA 2 , wherein AA 1 represents a refinement ability value of the Al-Ti-C alloy before the press process, AA 2 represents a refinement ability value of the Al-Ti-C alloy after the press process.
- K is a constant and can be calculated according the data of table 1 to be 5.13.
- ⁇ T represents a temperature variation of the Al-Ti-C alloy before the press process and after the press process.
- V represents a line speed of the outlet.
- the press process parameters including temperature variation ⁇ T, line speed of the outlet V, and the amount of the standers are normally fixed, and through controlling on the compression ratio of the press process of the Al-Ti-C alloy, the refinement ability variation ⁇ AA can be controlled precisely.
- ⁇ T 150°C
- V 4m/s
- the method for controlling variations of Al-Ti-C alloy crystal grain refinement ability through controlling a compression ratio of sectional area of Al-Ti-C alloy has overcome the deficiencies of conventional technique for Al-Ti-C alloy process, and proved that variations of the refinement ability can be controlled through controlling a compression ratio of sectional area of Al-Ti-C alloy.
- the variations of the refinement ability of Al-Ti-C alloy crystal grain can be precisely controlled by controlling the compression ratio.
Description
- The present invention relates to processing techniques, especially relates to a method for controlling variations of Al(aluminum)-Ti(titanium)-C(carbon) alloy crystal grain refinement through controlling a ratio of sectional area of Al-Ti-C alloy before press processing to after press processing (namely compression ratio) during a production of the Al-Ti-C alloy.
- Currently, Al-Ti-C alloy is much popularly employing in Al material machining as a most efficient preliminary alloy for Al and Al alloy coagulation crystal grain refinement. A refinement ability of the Al-Ti-C alloy crystal grain is a very important factor when judging a quality of Al processing material. Usually, the better the Al-Ti-C alloy crystal grain refinement ability is, the higher yield strength and the better malleability of the Al material are. Therefore, the Al-Ti-C alloy manufacturers and research organizations are forward into developing improvements of the Al-Ti-C alloy crystal grain refinement ability. The US aluminum association has specially ruled an AA value to represent the crystal grain refinement ability. The AA value is a value that can be used for measuring the Al-Ti-C alloy crystal grain refinement ability, and the lesser the AA value is, the better the refinement ability of the Al-Ti-C alloy is. That is, the lesser AA value that the Al-Ti-C alloy added during Al and Al alloy producing process has, the more refined the crystal grain of the Al and Al alloy are. With a development of the process and refinement technology, the AA value is decreased from 250 at very beginning to 170. Presently, alloy fabrication technology is focused on material components, melting process, and such like. However, a quality control during a press process of the Al-Ti-C alloy has been ignored or indifferent to people. The press process includes mill rolling and cast extrusion machine extruding, and many believe that a ratio of the sectional area before press process to that after press process (defined as compression ratio), a variation of temperatures before and after press process, a line speed at exit, and a quantity of the standers have relations with the refinement ability of the Al-Ti-C alloy crystal grain, and there is no quantitative optimal control method for control the refinement ability of the Al-Ti-C alloy crystal grain through these respects including compression ratio.
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WO 88/09392 - What is needed, therefore, is a method for controlling variations of Al-Ti-C alloy crystal grain refinement ability through controlling a compression ratio of sectional area of Al-Ti-C alloy that can overcome the above-described deficiencies.
- It is an object of the present invention to provide a method for controlling variations of Al-Ti-C alloy crystal grain refinement ability through controlling a compression ratio of sectional area of Al-Ti-C alloy.
- One exemplary embodiment of the present invention is a method for controlling variations of Al-Ti-C alloy crystal grain refinement ability through controlling a compression ratio of sectional area of Al-Ti-C alloy including: A. establishing a relationship between variations of refinement ability of Al-Ti-C alloy crystal grain and parameters of press process of the Al-Ti-C alloy; setting the parameters of press process and controlling the variation of the refinement ability of the Al-Ti-C alloy crystal grain through controlling a value of the compression ratio.
- Other novel features and advantages will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
- The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of at least one embodiment of the present invention. In the drawings, like reference numerals designate corresponding parts throughout various views, and all the views are schematic.
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FIG. 1 is a schematic view of continuous casting and tandem rolling manufacturing process employing a method for controlling variations of Al-Ti-C alloy crystal grain refinement ability through controlling a compression ratio of sectional area of Al-Ti-C alloy according to an exemplary embodiment of the present invention. -
FIG. 2 is a schematic view of continuous casting and continuous extruding manufacturing process employing the method for controlling variations of Al-Ti-C alloy crystal grain refinement ability through controlling a compression ratio of sectional area of Al-Ti-C alloy. -
FIG. 3 is a schematic, plane structural view of part of a rolling mill used for the method for controlling variations of Al-Ti-C alloy crystal grain refinement ability through controlling a compression ratio of sectional area of Al-Ti-C alloy. -
FIG. 4 is a schematic, plane structural view of a cast extrusion machine used for the method for controlling variations of Al-Ti-C alloy crystal grain refinement ability through controlling a compression ratio of sectional area of Al-Ti-C alloy. - Reference will now be made to the drawings to describe preferred and exemplary embodiments in detail.
- It has been proved that during a press process of the Al-Ti-C alloy, a pressure parameter of the press process is directly related with the refinement ability of the Al-Ti-C alloy crystal grain by experiments conducted by inventors of the present application using continuous casting and tandem rolling machines, and continuous casting and continuous extruding machines. The pressure parameter is closely relevant to the refinement ability of the Al-Ti-C alloy crystal grain. The following is a table 1 showing part of the experiments data.
Table 1 S1 (mm2) S2 (mm2) ΔT (°C) V (m/s) n ΔAA AA1 AA2 760 70.8 10.7 3 3 7 7.9 170 162 780 70.8 11.0 3 3 7 8.1 170 162 800 70.8 11.3 3 3 7 8.3 170 162 960 70.8 13.6 3 3 7 9.9 170 160 980 70.8 13.8 3 3 7 10.1 170 160 1000 70.8 14.1 3 3 7 10.4 170 160 1160 70.8 16.4 3 3 7 12.0 170 158 1180 70.8 16.7 3 3 7 12.2 170 158 1200 70.8 16.9 3 3 7 12.4 170 158 760 70.8 10.7 4 6 8 10.3 170 160 780 70.8 11.0 4 6 8 10.6 170 159 800 70.8 11.3 4 6 8 10.9 170 159 960 70.8 13.6 4 6 8 13.0 170 157 980 70.8 13.8 4 6 8 13.3 170 157 1000 70.8 14.1 4 6 8 13.6 170 156 1160 70.8 16.4 4 6 8 15.8 170 154 1180 70.8 16.7 4 6 8 16.0 170 154 1200 70.8 16.9 4 6 8 16.3 170 154 760 70.8 10.7 5 9 10 9.9 170 160 780 70.8 11.0 5 9 10 10.2 170 160 800 70.8 11.3 5 9 10 10.4 170 160 960 70.8 13.6 5 9 10 12.5 170 157 980 70.8 13.8 5 9 10 12.8 170 157 1000 70.8 14.1 5 9 10 13.0 170 157 1160 70.8 16.4 5 9 10 15.1 170 155 1180 70.8 16.7 5 9 10 15.4 170 155 1200 70.8 16.9 5 9 10 15.7 170 154 - There is an international standard for the Al-Ti-C alloy production that the final product of the Al-Ti-C alloy should have a diameter of 9.5mm, that is a sectional area of 70.8mm2. Contents of table 1 is part of experiments data conducted by continuous casting and tandem rolling machines using a method for controlling variations of Al-Ti-C alloy .crystal grain refinement ability through controlling a compression ratio of sectional area of Al-Ti-C alloy according to an exemplary embodiment of the present invention. The continuous casting and tandem rolling machines includes a rolling mill 30 and a cooling module for Al-Ti-C alloy during a cooling press process. The cooling module includes a temperature sensor for detecting a temperature before the press process of the Al-Ti-C alloy and a temperature after the press process of the Al-Ti-C alloy. The press process of the Al-Ti-C alloy is completed through a cooperation of two
rollers 31 of the rolling mill 30, and the Al-Ti-C alloy maintains solid state before, after, and during the press process. During the press process, there are two points of temperatures that one point of the temperature is before the pressure being imposed and the other point of the temperature is after the pressure being released. Before the pressure being imposed, an instantaneous temperature of the Al-Ti-C alloy is about the same as an input temperature, and after the pressure being released, an instantaneous temperature of Al-Ti-C alloy is about the same as an output temperature, therefore it is convenient to detect temperatures of the two points. - Referring to
FIG. 1 , Al-Ti-C alloy melt is put into acrystallize wheel 20 from acrucible 10 thereby forming an Al-Ti-C alloy bar. Thereafter, the bar-shaped Al-Ti-C alloy is put into the rolling mill 30 to conduct press process. An amount of standers of the rolling mill 30 could be 3, 4, 5, 6, 7, 8, 9 or 10. In the illustrated embodiment as shown inFIG 1 , an amount of standers of the rolling mill 30 is 10. Referring toFIG. 3 , one stand of the rolling mill 30 is shown in enlarged view. The tworollers 31 of the rolling mill 30 are rolling inward and toward each other. S1 is denoted for the sectional area before press process, and S2 is denoted for the sectional area after the press process. There are at least two temperature sensors provided therein, which are configured to detect the temperature of the Al-Ti-C alloy before the press process and the temperature of the Al-Ti-C alloy after the press process. A scope of temperatures of the Al-Ti-C alloy before the press process is between 300°C-450 °C. The temperature of the Al-Ti-C alloy is raised when being processed in the rolling mill 30. The cooling module is configured for sprayingcooling fluid 50 onto therollers 31 of the rolling mill 30. By controlling a flow rate of thecooling fluid 50, a temperature difference ΔT of the Al-Ti-C alloy before the press process and after the press process can be controlled within a proper range. In the illustrated embodiment, thecooling fluid 50 can be water. The Al-Ti-C alloy comes out from the rolling mill 30 and forms an Al-Ti-C alloy rod. -
- In the formula, Δ AA=AA1 - AA2, wherein AA1 represents a refinement ability value of the Al-Ti-C alloy before the press process, AA2 represents a refinement ability value of the Al-Ti-C alloy after the press process. K is a constant and can be calculated according the data of table 1 to be 5.13. D represents the compression ratio, and D=S1/S2, S1 is denoted for the sectional area before press process, and S2 is denoted for the sectional area after the press process. ΔT represents a temperature variation of the Al-Ti-C alloy before the press process and after the press process. V represents a line speed of the outlet, and V=3ΔT-6, V ≥ 1m/s. Currently the line speed V can reach high to 30m/s. N represents the number of the standers of the rolling mill 30.
- The above-mentioned formula ΔAA=K • D • V/ (ΔT • n) is applicable to both single stander and a plurality of standers, that is, whether the computation is for total standers or for single stander, the formula is applicable. When n=1, the computation means for the last one of the standers, and the sectional area of the Al-Ti-C alloy products output from the last stander is 70.8mm2.
- In the production of the Al-Ti-c alloy, the press process parameters including temperature variation ΔT, line speed of the outlet V, and the amount of the standers are normally fixed, and through controlling on the compression ratio of the press process of the Al-Ti-C alloy, the refinement ability variation Δ AA can be controlled precisely. As shown in table 1, when ΔT=4°C, V=6m/s, and n=8, by controlling the compression ratio D from 10.7 to 16.9, the refinement ability ΔAA can raised from 10.3 up to 16.3, and when the AA1 value maintains at 170, the AA2 value can be changed from 160 to 154.
Table 2 S1 (mm2) S2 (mm2) ΔT (°C) V (m/s) n ΔAA AA1 AA2 760 70.8 10.7 149 3 1 1.1 170 169 780 70.8 11.0 149 3 1 1.1 170 169 800 70.8 11.3 149 3 1 1.2 170 169 960 70.8 13.6 149 3 1 1.4 170 169 980 70.8 13.8 149 3 1 1.4 170 169 1000 70.8 14.1 149 3 1 1.5 170 169 1160 70.8 16.4 149 3 1 1.7 170 168 1180 70.8 16.7 149 3 1 1.7 170 168 1200 70.8 16.9 149 3 1 1.8 170 168 1360 70.8 19.2 149 3 1 2.0 170 168 1380 70.8 19.5 149 3 1 2.0 170 168 1400 70.8 19.8 149 3 1 2.0 170 168 760 70.8 10.7 150 4 1 1.5 170 169 780 70.8 11.0 150 4 1 1.5 170 168 800 70.8 11.3 150 4 1 1.5 170 168 960 70.8 13.6 150 4 1 1.9 170 168 980 70.8 13.8 150 4 1 1.9 170 168 1000 70.8 14.1 150 4 1 1.9 170 168 1160 70.8 16.4 150 4 1 2.2 170 168 1180 70.8 16.7 150 4 1 2.3 170 168 1200 70.8 16.9 150 4 1 2.3 170 168 1360 70.8 19.2 150 4 1 2.6 170 167 1380 70.8 19.5 150 4 1 2.7 170 167 1400 70.8 19.8 150 4 1 2.7 170 167 760 70.8 10.7 149 5 1 1.8 170 168 780 70.8 11.0 149 5 1 1.9 170 168 800 70.8 11.3 149 5 1 1.9 170 168 960 70.8 13.6 149 5 1 2.3 170 168 980 70.8 13.8 149 5 1 2.4 170 168 1000 70.8 14.1 149 5 1 2.4 170 168 1160 70.8 16.4 149 5 1 2.8 170 167 1180 70.8 16.7 149 5 1 2.9 170 167 1200 70.8 16.9 149 5 1 2.9 170 167 1360 70.8 19.2 149 5 1 3.3 170 167 1380 70.8 19.5 149 5 1 3.4 170 167 1400 70.8 19.8 149 5 1 3.4 170 167 760 70.8 10.7 151 6 1 2.2 170 168 780 70.8 11.0 151 6 1 2.2 170 168 800 70.8 11.3 151 6 1 2.3 170 168 960 70.8 13.6 151 6 1 2.8 170 167 980 70.8 13.8 151 6 1 2.8 170 167 1000 70.8 14.1 151 6 1 2.9 170 167 1160 70.8 16.4 151 6 1 3.3 170 167 1180 70.8 16.7 151 6 1 3.4 170 167 1200 70.8 16.9 151 6 1 3.5 170 167 1360 70.8 19.2 151 6 1 3.9 170 166 1380 70.8 19.5 151 6 1 4.0 170 166 1400 70.8 19.8 151 6 1 4.0 170 166 - Contents of table 2 is part of experiments data conducted by continuous casting and continuous extruding machines designed by the applicant and using a method for controlling variations of Al-Ti-C alloy crystal grain refinement ability through controlling a compression ratio of sectional area of Al-Ti-C alloy according to an exemplary embodiment of the present invention. The continuous casting and continuous extruding machines includes a casting
extrusion machine 40 and a cooling module for Al-Ti-C alloy during a cooling press process. The press process of the Al-Ti-C alloy is competed in a roller of the castingextrusion machine 40. The Al-Ti-C alloy maintains solid state before, after, and during the press process. During the press process, there are two points of temperatures that one point of the temperature is before the pressure being imposed and the other point of the temperature is after the pressure being released. Before the pressure being imposed, an instantaneous temperature of the Al-Ti-C alloy is about the same as an friction heat temperature, and after the pressure being released, an instantaneous temperature of Al-Ti-C alloy is about the same as an temperature outputted from the castingextrusion machine 40, therefore it is convenient to detect temperatures of the two points. - Referring to
FIG. 2 , Al-Ti-C alloy melt is put into acrystallize wheel 20 from acrucible 10 thereby forming an Al-Ti-C alloy bar. Thereafter, the bar-shaped Al-Ti-C alloy is put into the castingextrusion machine 40 to conduct press process. - Referring to
FIG. 2 , Al-Ti-C alloy melt is put into acrystallize wheel 20 from acrucible 10 thereby forming an Al-Ti-C alloy bar. Thereafter, the bar-shaped Al-Ti-C alloy is put into the castingextrusion machine 40 to conduct press process. An amount of the standers of the castingextrusion machine 40 is as shown inFIG 2 . Referring toFIG 4 , S1 is denoted for the sectional area before press process, and S2 is denoted for the sectional area after the press process. There are at least two temperature sensors provided therein, which are configured to detect the temperature of the Al-Ti-C alloy before the press process and the temperature of the Al-Ti-C alloy after the press process. The temperature of the Al-Ti-C alloy is raised when being processed in the castingextrusion machine 40 and the Al-Ti-C alloy is altered into semifluid. The cooling module spraying cooling fluid into the castingextrusion machine 40. By controlling a flow rate of the cooling fluid, a temperature difference ΔT of the Al-Ti-C alloy before the press process and after the press process can be controlled within a proper range. In the illustrated embodiment, the cooling fluid can be water. The Al-Ti-C alloy comes out from the castingextrusion machine 40 and forms an Al-Ti-C alloy rod. -
- In the formula, ΔAA=AA1 - AA2, wherein AA1 represents a refinement ability value of the Al-Ti-C alloy before the press process, AA2 represents a refinement ability value of the Al-Ti-C alloy after the press process. K is a constant and can be calculated according the data of table 1 to be 5.13. D represents the compression ratio, and D=S1/S2, S1 is denoted for the sectional area before press process, and S2 is denoted for the sectional area after the press process. ΔT represents a temperature variation of the Al-Ti-C alloy before the press process and after the press process. V represents a line speed of the outlet. N represents the number of the standers of the casting
extrusion machine 40, and n=1. - The above-mentioned formula ΔAA=K• D • V/ (Δ T • n ) is applicable to casting
extrusion machine 40 with single stander. When n=1, the computation means for the last one of the standers, and the sectional area of the Al-Ti-C alloy products output from the last stander is 70.8mm2. - In the production of the Al-Ti-c alloy, the press process parameters including temperature variation ΔT, line speed of the outlet V, and the amount of the standers are normally fixed, and through controlling on the compression ratio of the press process of the Al-Ti-C alloy, the refinement ability variation Δ AA can be controlled precisely. As shown in table 2, when ΔT=150°C, V=4m/s, and n=1, by controlling the compression ratio D from 10.7 to 19.8, the refinement ability ΔAA can raised from 1.5 to 2.7, and when the AA1 value maintains at 170, the AA2 value can be changed from 169 to 167.
- The method for controlling variations of Al-Ti-C alloy crystal grain refinement ability through controlling a compression ratio of sectional area of Al-Ti-C alloy has overcome the deficiencies of conventional technique for Al-Ti-C alloy process, and proved that variations of the refinement ability can be controlled through controlling a compression ratio of sectional area of Al-Ti-C alloy. By adopting the present invention, with the parameters of press process, the temperature variation before and after the press process, the line speed of outlet, and the amount of the standers being set fixed, the variations of the refinement ability of Al-Ti-C alloy crystal grain can be precisely controlled by controlling the compression ratio. The greater the variation is, the better the refinement ability of Al-Ti-C alloy crystal grain is with a certain AA value before the press process and a lesser AA value after the press process.
- It is to be understood, however, that even though numerous characteristics and advantages of exemplary and preferred embodiments have been set out in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Claims (1)
- A method for controlling variations of Al-Ti-C alloy crystal grain refinement ability through controlling a compression ratio of sectional area of Al-Ti-C alloy comprising:A. establishing a relationship between variations of refinement ability of Al-Ti-C alloy crystal grain and parameters of press process of the Al-Ti-C alloy:
wherein ΔAA=AA1-AA2, AA1 represents a refinement ability value of the Al-Ti-C alloy before the press process, AA2 representing a refinement ability value of the Al-Ti-C alloy after the press process, K being a constant, wherein D=S1/S2,S1 being denoted for the sectional area before press process, and S2 being denoted for the sectional area after the press process, wherein ΔT represents a temperature variation of the Al-Ti-C alloy before the press process and after the press process, V representing a line speed of an outlet, n representing a number of the standers of process machine;B. setting the parameters V, ΔT, and n, and controlling the ΔAA value through controlling a value of the compression ratio D.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010101100600A CN101838783B (en) | 2010-02-05 | 2010-02-05 | Method for controlling variable quantity of grain refinement capability of TiAl carbon alloy by compression ratio control |
PCT/CN2010/072550 WO2011022985A1 (en) | 2010-02-05 | 2010-05-10 | Method for controlling variation of grain refining ability of al-ti-c alloy by controlling compression ratio |
Publications (3)
Publication Number | Publication Date |
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EP2357263A1 EP2357263A1 (en) | 2011-08-17 |
EP2357263A4 EP2357263A4 (en) | 2012-12-05 |
EP2357263B1 true EP2357263B1 (en) | 2014-09-03 |
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EP10723902.2A Not-in-force EP2357263B1 (en) | 2010-02-05 | 2010-05-10 | Method for controlling variation of grain refining ability of al-ti-c alloy by controlling compression ratio |
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US (1) | US20110192503A1 (en) |
EP (1) | EP2357263B1 (en) |
CN (1) | CN101838783B (en) |
ES (1) | ES2519167T3 (en) |
GB (1) | GB2479853B (en) |
WO (1) | WO2011022985A1 (en) |
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CN102676957B (en) * | 2012-03-14 | 2014-01-15 | 河南理工大学 | Anti-corrosion aluminum alloy for complex heat conduction system and production method thereof |
CN115341116B (en) * | 2021-05-12 | 2023-04-18 | 中国科学院过程工程研究所 | Aluminum-titanium-carbon-nitrogen intermediate alloy refiner and preparation method thereof |
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US4612073A (en) * | 1984-08-02 | 1986-09-16 | Cabot Corporation | Aluminum grain refiner containing duplex crystals |
SE8702149L (en) * | 1987-05-22 | 1988-11-23 | Baeckerud Innovation Ab | ALUMINIUMFOERLEGERING |
US5100488A (en) * | 1988-03-07 | 1992-03-31 | Kb Alloys, Inc. | Third element additions to aluminum-titanium master alloys |
RU2021048C1 (en) * | 1993-02-01 | 1994-10-15 | Новолипецкий металлургический комбинат | Method of preparing rolls for operation |
US5481086A (en) * | 1994-08-09 | 1996-01-02 | Dynamic Systems Inc. | High temperature deformable crucible for use with self-resistively heated specimens |
GB2299099A (en) * | 1995-03-18 | 1996-09-25 | Christopher Duncan Mayes | Process for producing grain refining master alloys. |
CN1109767C (en) * | 2000-10-20 | 2003-05-28 | 山东大学 | Method for preparing aluminium-titanium-carbon intermediate alloy |
EP1205567B1 (en) * | 2000-11-10 | 2005-05-04 | Alcoa Inc. | Production of ultra-fine grain structure in as-cast aluminium alloys |
KR100526302B1 (en) * | 2003-07-04 | 2005-11-08 | 주식회사 Slm | Additive for miniaturing crystallization of aluminium-silicon alloy |
WO2006129566A1 (en) * | 2005-05-30 | 2006-12-07 | Osaka University | Method for processing magnesium alloy sheet and magnesium alloy sheet |
DE502005006241D1 (en) * | 2005-06-07 | 2009-01-22 | Deutsch Zentr Luft & Raumfahrt | ALUMINUM ALLOY BEARING |
CN100402681C (en) * | 2006-09-05 | 2008-07-16 | 中国铝业股份有限公司 | Preparation method of Al-TiC master alloy |
CN101768708B (en) * | 2010-02-05 | 2012-05-23 | 深圳市新星轻合金材料股份有限公司 | Method for controlling variable quantity of grain refining capacity of aluminum-titanium-boron alloy by controlling compression ratio |
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2010
- 2010-02-05 CN CN2010101100600A patent/CN101838783B/en active Active
- 2010-05-10 EP EP10723902.2A patent/EP2357263B1/en not_active Not-in-force
- 2010-05-10 GB GB1114921.8A patent/GB2479853B/en not_active Expired - Fee Related
- 2010-05-10 US US12/867,195 patent/US20110192503A1/en not_active Abandoned
- 2010-05-10 ES ES10723902.2T patent/ES2519167T3/en active Active
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EP2357263A1 (en) | 2011-08-17 |
WO2011022985A1 (en) | 2011-03-03 |
CN101838783B (en) | 2012-01-04 |
GB201114921D0 (en) | 2011-10-12 |
GB2479853B (en) | 2012-02-08 |
CN101838783A (en) | 2010-09-22 |
US20110192503A1 (en) | 2011-08-11 |
ES2519167T3 (en) | 2014-11-06 |
GB2479853A (en) | 2011-10-26 |
EP2357263A4 (en) | 2012-12-05 |
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