WO2024051856A1 - 一种提升6016汽车冲压板包边性能的制造方法 - Google Patents
一种提升6016汽车冲压板包边性能的制造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 230000032683 aging Effects 0.000 claims abstract description 36
- 238000000265 homogenisation Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000006104 solid solution Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 23
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 238000005266 casting Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 238000007670 refining Methods 0.000 claims abstract description 14
- 238000005097 cold rolling Methods 0.000 claims abstract description 13
- 238000005098 hot rolling Methods 0.000 claims abstract description 13
- 229910000838 Al alloy Inorganic materials 0.000 claims description 62
- 238000010791 quenching Methods 0.000 claims description 40
- 230000000171 quenching effect Effects 0.000 claims description 40
- 238000010438 heat treatment Methods 0.000 claims description 31
- 239000000243 solution Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000003723 Smelting Methods 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 150000001875 compounds Chemical class 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052748 manganese Inorganic materials 0.000 claims description 8
- 238000009957 hemming Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 238000007872 degassing Methods 0.000 claims description 6
- 239000004615 ingredient Substances 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 16
- 238000000137 annealing Methods 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 5
- 239000011159 matrix material Substances 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 29
- 230000000052 comparative effect Effects 0.000 description 17
- 239000000758 substrate Substances 0.000 description 15
- 239000012535 impurity Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910019752 Mg2Si Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011856 silicon-based particle Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
Classifications
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- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- 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
-
- 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
- C22F1/043—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 of alloys with silicon as the next major constituent
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the invention belongs to the technical field of aluminum alloy processing, and specifically relates to a manufacturing method for improving the edge wrapping performance of 6016 automobile stamping plates.
- Automotive panel hemming technology is a process that bends the edges of outer panels and fastens and connects inner and outer panels.
- 6016 automotive stamping sheets are used as automobile exterior parts. After stamping, they need to be edged.
- the synthesis of the inner and outer panels of the engine cover uses the edge edge process. Therefore, the aluminum alloy plate is required to have good edge edge properties.
- the excellent edge binding performance can ensure that when the outer panel of the panel is wrapped around the inner panel of the panel, there will be no micro-cracks on the surface of the material and the arc of the edge will be smooth and delicate. .
- the Chinese invention patent with application publication number CN101935785A discloses a highly formable aluminum alloy for automobile bodies.
- This invention patent avoids the insoluble Mg2Si phase by controlling the contents of the main alloy elements Mg, Si, and Cu, and the process of Si particles Formation, thereby improving the formability of the material, while ensuring the content and proportion of Mg and Si phases, so that the baking hardening performance of the material meets the needs of use; and the content of trace elements Fe and Mn are reasonably controlled to control the grain size, thereby achieving further
- the purpose is to improve the formability of the material; however, although the aluminum alloy prepared by this technical solution has good elongation, it does not have good edge wrapping properties;
- the Chinese invention patent application with publication number CN105543741A discloses an intermediate annealing process for aluminum alloys and aluminum alloys for automobile panels.
- the invention patent uses continuous annealing to increase the annealing temperature of the intermediate annealing process and improve the quality of the returned aluminum alloys. Microstructure morphology, thereby improving the flanging performance of the product; although the technical solution provided by the invention patent can make the surface of the produced aluminum alloy smooth after flanging, without crack initiation lines or cracks, the process is used to prepare The cost of aluminum alloy is higher;
- the invention patent application published with the application publication number CN105441740A discloses a 6XXX series aluminum alloy plate with high hemming performance for automobile bodies and its manufacturing method.
- the invention patent uses a higher homogenization heat treatment temperature to treat the hot-rolled strip.
- the material is cold rolled, intermediate annealed, cold rolled again, and the cold rolling reduction rate of the cold rolled again is 60-85% to improve the aluminum
- the invention patent did not improve the intermediate annealing system and did not control the evolution process of the structure within the aluminum alloy, resulting in unsatisfactory hemming properties of the prepared aluminum alloy;
- the Chinese invention patent with application publication number CN109868398A discloses a 6xxx series aluminum alloy plate with high flanging performance. It mainly adjusts the proportion of coarse second phase and fine second phase in the plate structure after intermediate annealing, giving full play to the
- the coarse second phase promotes the recrystallization nucleation (PSN mechanism) and the fine second phase hinders the growth of recrystallized grains, thereby improving the final plate grain size and adjusting the proportion of the second phase in the final finished plate.
- PSN mechanism recrystallization nucleation
- It has excellent flanging performance to meet the needs of automobile panel outer panels.
- the intermediate annealing before solution quenching mainly emphasizes the adjustment of the second phase ratio and the proportion of the final finished panel after annealing. Grain size, but it does not control the impurity compounds that affect the edge binding performance of automobile panels, the morphology, size, mechanical properties, and dimensional accuracy of second phase compounds.
- the purpose of the present invention is to overcome the shortcomings of the existing technology and provide a manufacturing method that effectively improves the edge wrapping performance of 6016 automotive stamping plates.
- a manufacturing method for improving the edge binding performance of 6016 automobile stamping plates including the following preparation process:
- step S2 Smelting and casting.
- the raw materials in step S1 are placed in the smelting furnace for smelting.
- the melt is then introduced into the refining furnace for refining. After degassing and slag removal, it is cast into a 600-650mm thick aluminum alloy ingot. ;
- step S3 Homogenization heat treatment. After sawing and milling the aluminum alloy ingot obtained in step S2, put it into a heating furnace and homogenize it. Homogenization heat treatment, the metal temperature is controlled at 565°C-570°C, and the temperature is kept for 15 hours;
- Hot rolling perform multi-pass hot rolling on the aluminum alloy ingot after homogenization heat treatment to obtain an 8.0mm thick hot-rolled billet
- the 8.0mm thick hot-rolled billet obtained in S4 is subjected to the first pass of ultra-fine rolling using high pressure and large processing rate to a 4.0mm thick first cold-rolled billet, and then the first pass
- the cold-rolled billet is subjected to 3-4 passes of ordinary rolling at a processing rate of 25%-35% per pass to obtain a second cold-rolled billet, and finally the second cold-rolled billet is processed at a processing rate of 15%-20%.
- the finished coil is solution quenched in a continuous quenching line using a sub-temperature solution method.
- the solution temperature is 495 ⁇ At 5°C, the solid solution holding time is 2-3.5 minutes.
- water spray quenching is performed when the transfer time is less than 20 seconds.
- the water temperature is lower than 35°C, and the cooling rate of water spray quenching is 100°C/ Seconds or more; pre-aging treatment should be carried out within 3 minutes after water spray quenching.
- the pre-aging temperature is 190 ⁇ 5°C
- the pre-aging holding time is 50 to 70 seconds
- multiple air cooling channels are installed at the outlet of the pre-aging furnace. Zone, so that the material temperature of the pre-aged aluminum coil drops below 45°C before export winding;
- the finished coil processed by S6 is tensioned, straightened, and transversely sheared to obtain an aluminum alloy base material.
- the ratio of Mn and Fe is controlled to 1:1.
- the inclusion content in the launder is less than 0.02 mm 2 /kg, and the inclusion size is less than 12 ⁇ m.
- the aluminum alloy base material has a tensile strength of 200-215MPa, a yield strength of 90-110MPa, a yield ratio of less than 0.5, and an elongation at break of A50mm of more than 24.0%; the minimum relative bending radius of the edge can be less than 0.5t and The flanging morphology can reach first-class morphology.
- the invention controls Mn with Fe
- the ratio is 1:1, which can maximize the transformation of the iron-rich phase structure from ⁇ -AlFeSi to ⁇ -AlFeSi phase, making the iron-rich phase appear in the form of small Chinese characters or polygonal particles, dispersedly distributed in the ternary eutectic In the structure, reduce the harmful effects of ⁇ -AlFeSi phase, thereby improving the morphology of the iron-rich phase;
- the present invention found that the homogenization heat treatment caused the iron-rich phase morphology to transform from needle-like or flaky ⁇ -AlFeSi phase to granular or Hanzi-like ⁇ -AlFeSi phase, the addition of Mn can accelerate the transformation of the iron-rich phase during the homogenization heat treatment process.
- the 6016 alloy ingot becomes brittle needle-shaped or flake-shaped.
- the ⁇ -AlFeSi phase transforms into the granular ⁇ -AlFeSi phase.
- the spheroidization rate of the Fe-rich phase reaches more than 95%.
- the reduction of the coarse Fe-rich phase avoids the stress concentration of dislocations around the coarse second phase during bending and edge wrapping. , effectively avoids the formation of micro-cracks during hemming, thereby improving the hemming performance;
- the total processing rate of the hot-rolled blank to the finished coil is more than 85%, and in the first pass of cold rolling, high-pressure and high-processing rate ultra-fine rolling is used to fully The second phase particles in the matrix are broken and refined to achieve the purpose of refining the structure; on the other hand, in the last pass of cold rolling, a smaller cold rolling processing rate of no more than 20% is used, which is beneficial to Improved dimensional accuracy and plate shape quality of finished products, reducing edge wrinkling or cracking caused by uneven thickness and poor plate shape during edge wrapping, thereby improving edge wrapping performance;
- the solid solution temperature is controlled at 495 ⁇ 5°C, thereby maintaining a lower solid solution temperature, thereby facilitating the refinement of the grains, and after the solution quenching is completed, water spraying is performed.
- Pre-aging treatment is carried out within 3 minutes after shower quenching, which can effectively reduce the mechanical properties of the finished coil after pre-aging treatment and reduce its yield strength, thus ensuring that the finished coil has good bending performance;
- the 6061 automotive stamping plate prepared by the method provided by the present invention has good bending performance and edge wrapping performance.
- Figure 1 is a grain diagram of the aluminum alloy substrate prepared in Example 1;
- Figure 2 is a grain diagram of the aluminum alloy substrate prepared in Comparative Example 4.
- Figure 3 is an SEM image of the fracture surface of the aluminum alloy substrate prepared in Example 1;
- Figure 4 is an SEM image of the fracture surface of the aluminum alloy substrate prepared in Comparative Example 4.
- a manufacturing method for improving the edge binding performance of 6016 automobile stamping plates including the following preparation process:
- step S2 Smelting and casting.
- the raw materials in step S1 are placed in the smelting furnace for smelting.
- the melt is then introduced into the refining furnace for refining. After degassing and slag removal, it is cast into a 600-650mm thick aluminum alloy ingot. ;
- step S3 Homogenization heat treatment. After sawing and milling the aluminum alloy ingot obtained in step S2, place it in a heating furnace for homogenization heat treatment. The metal temperature is controlled at 565°C-570°C and kept warm for 15 hours;
- Hot rolling perform multi-pass hot rolling on the aluminum alloy ingot after homogenization heat treatment to obtain an 8.0mm thick hot-rolled billet
- the finished coil is solution quenched in a continuous quenching line using a sub-temperature solution method.
- the solution temperature is 495 ⁇ At 5°C, the solid solution holding time is 2-3.5 minutes.
- water spray quenching is performed when the transfer time is less than 20 seconds.
- the water temperature is lower than 35°C, and the cooling rate of water spray quenching is 100°C/ Seconds or more; pre-aging treatment should be carried out within 3 minutes after water spray quenching.
- the pre-aging temperature is 190 ⁇ 5°C
- the pre-aging holding time is 50 to 70 seconds
- multiple air cooling channels are installed at the outlet of the pre-aging furnace. Zone, so that the material temperature of the pre-aged aluminum coil drops below 45°C before export winding;
- the finished coil processed by S6 is tensioned, straightened, and transversely sheared to obtain an aluminum alloy base material.
- the ratio of Mn to Fe in S1 is controlled to 1:1;
- Fe element is an impurity element in aluminum alloy. Since its solubility in the aluminum matrix is very low, it will inevitably form during the casting process.
- the impurity phase affects the mechanical properties and corrosion resistance of the alloy; this impurity phase is mainly the AlFeSi phase, which will transform during the homogenization and heat preservation process, from the lath-like ⁇ -AlFeSi phase to the granular ⁇ -AlFeSi phase. ;
- the Mn element can accelerate the speed of this transformation, and the Mn element provides an innate elemental basis for the Fe-rich phase transformation.
- the Mn element can change the morphology of the iron-rich phase to a certain extent and promote the precipitation process.
- the inclusion content in the launder is less than 0.02 mm 2 /kg, and the inclusion size is less than 12 ⁇ m; thereby reducing the content of impurity compounds in the plate.
- a manufacturing method for improving the edge binding performance of 6016 automobile stamping plates including the following preparation process:
- step S2 Smelting and casting.
- the raw materials in step S1 are placed in the smelting furnace for smelting, and then the melt is introduced into the refining furnace for refining. After degassing and slag removal, it is cast into a 600mm thick aluminum alloy ingot; proceed During melting and casting, metal and non-metallic compounds are strictly controlled, the launder inclusion content is ⁇ 0.02mm 2 /kg, and the inclusion size is less than 12 ⁇ m; thereby reducing the content of impurity compounds in the plate;
- step S3 Homogenization heat treatment. After sawing and milling the aluminum alloy ingot obtained in step S2, place it in a heating furnace for homogenization heat treatment. The metal temperature is controlled at 565°C-570°C and kept warm for 15 hours;
- Hot rolling perform multi-pass hot rolling on the aluminum alloy ingot after homogenization heat treatment to obtain an 8.0mm thick hot-rolled billet
- the 8.0mm thick hot-rolled billet obtained in S4 is subjected to the first pass of ultra-fine rolling using high pressure and large processing rate to a 4.0mm thick first cold-rolled billet, and then the first pass
- the cold-rolled billets are processed at a processing rate of 35% per pass. Perform 3 passes of ordinary rolling to obtain a second cold-rolled billet, and finally cold-roll the second cold-rolled billet to a 0.9mm finished coil at a processing rate of 18%;
- the finished coil is solution quenched in a continuous quenching line using a sub-temperature solution method.
- the solid solution temperature is 495 ⁇ 5°C.
- the solid solution holding time is 2 minutes.
- water spray quenching is performed when the transfer time is less than 20 seconds.
- the water temperature is lower than 35°C, and the water spray quenching cooling rate is above 100°C/second; water
- pre-aging treatment is carried out within 3 minutes.
- the pre-aging temperature is 190 ⁇ 5°C, and the pre-aging holding time is 55 seconds.
- the finished coil processed by S6 is tensioned, straightened, and transversely sheared to obtain an aluminum alloy base material.
- a manufacturing method for improving the edge binding performance of 6016 automobile stamping plates including the following preparation process:
- step S2 Smelting and casting.
- the raw materials in step S1 are placed in the smelting furnace for smelting, and then the melt is introduced into the refining furnace for refining. After degassing and slag removal, it is cast into a 650mm thick aluminum alloy ingot; proceed During melting and casting, metal and non-metallic compounds are strictly controlled, the launder inclusion content is ⁇ 0.02mm 2 /kg, and the inclusion size is less than 12 ⁇ m; thereby reducing the content of impurity compounds in the plate;
- step S3 Homogenization heat treatment. After sawing and milling the aluminum alloy ingot obtained in step S2, place it in a heating furnace for homogenization heat treatment. The metal temperature is controlled at 565°C-570°C and kept warm for 15 hours;
- Hot rolling perform multi-pass hot rolling on the aluminum alloy ingot after homogenization heat treatment to obtain an 8.0mm thick hot-rolled billet
- the 8.0mm thick hot-rolled billet obtained in S4 is subjected to the first pass of ultra-fine rolling using high pressure and large processing rate to a 4.0mm thick first cold-rolled billet, and then the first pass The cold-rolled billet is subjected to 3 passes of ordinary rolling at a processing rate of 31% per pass to obtain a second cold-rolled billet. Finally, the second cold-rolled billet is cold-rolled at a processing rate of 16% to 1.1mm finished coil;
- the finished coil is solution quenched in a continuous quenching line using a sub-temperature solution method.
- the solid solution temperature is 495 ⁇ 5°C.
- the solid solution holding time is 3.0 minutes.
- water spray quenching is performed when the transfer time is less than 20 seconds.
- the water temperature is lower than 35°C, and the water spray quenching cooling rate is above 100°C/second; water
- pre-aging treatment is carried out within 3 minutes.
- the pre-aging temperature is 190 ⁇ 5°C, and the pre-aging holding time is 65 seconds.
- the finished coil processed by S6 is tensioned, straightened, and transversely sheared to obtain an aluminum alloy base material.
- a manufacturing method for improving the edge binding performance of 6016 automobile stamping plates including the following preparation process:
- step S2 Smelting and casting.
- the raw materials in step S1 are placed in the smelting furnace for smelting, and then the melt is introduced into the refining furnace for refining. After degassing and slag removal, it is cast into a 600mm thick aluminum alloy ingot; proceed During melting and casting, metal and non-metallic compounds are strictly controlled, the launder inclusion content is ⁇ 0.02mm 2 /kg, and the inclusion size is less than 12 ⁇ m; thereby reducing the content of impurity compounds in the plate;
- step S3 Homogenization heat treatment. After sawing and milling the aluminum alloy ingot obtained in step S2, place it in a heating furnace for homogenization heat treatment. The metal temperature is controlled at 565°C-570°C and kept warm for 15 hours;
- Hot rolling perform multi-pass hot rolling on the aluminum alloy ingot after homogenization heat treatment to obtain an 8.0mm thick hot-rolled billet
- the 8.0mm thick hot-rolled billet obtained in S4 is subjected to the first pass of ultra-fine rolling using high pressure and large processing rate to a 4.0mm thick first cold-rolled billet, and then the first pass The cold-rolled billet is subjected to 3 passes of ordinary rolling at a processing rate of 33% per pass to obtain a second cold-rolled billet. Finally, the second cold-rolled billet is cold-rolled to a 1.0mm finished coil at a processing rate of 17%. material;
- the finished coil is solution quenched in a continuous quenching line using a sub-temperature solution method.
- the solid solution temperature is 495 ⁇ 5°C.
- the solid solution holding time is 2.5 minutes.
- water spray quenching is performed when the transfer time is less than 20 seconds.
- the water temperature is lower than 35°C, and the cooling rate of water spray quenching is above 100°C/second; water After spray quenching, pre-aging treatment is carried out within 3 minutes.
- the pre-aging temperature is 190 ⁇ 5°C, and the pre-aging holding time is 60 seconds. There are multiple air-cooling zones at the outlet of the pre-aging furnace, so that after pre-aging The material temperature of the aluminum coil drops below 45°C before exporting;
- the finished coil processed by S6 is tensioned, straightened, and transversely sheared to obtain an aluminum alloy base material.
- Comparative Example 1 The production method of Comparative Example 1 is roughly the same as that of Example 1, except that when step S12 is performed, the added amount of Mn is 0.1% or less.
- Comparative Example 2 The production method of Comparative Example 2 is roughly the same as that of Example 1, except that during step S3, during the homogenization heat treatment, the metal temperature is controlled to 550°C and the temperature is maintained for 8 hours.
- Comparative Example 3 The production method of Comparative Example 3 is roughly the same as that of Example 1, except that in step S5, ordinary rolling is used to perform multiple passes of cold rolling on the hot-rolled billet to a finished coil with a thickness of 0.9 mm.
- Comparative Example 4 The production method of Comparative Example 4 is roughly the same as that of Example 1, except that when performing step S6, the solid solution temperature is 550°C; as shown in Figures 1 and 2, the solid solution temperature provided by the present invention is 495 ⁇ 5°C. Compared with the electron microscope images of the prepared aluminum alloy substrate and the aluminum alloy substrate prepared at the conventional solid solution temperature in Comparative Example 4, the grain size of the aluminum alloy substrate provided by the present invention is smaller than that prepared by the method provided in Comparative Example 4.
- the grain size of the aluminum alloy substrate as shown in Figure 3 and Figure 4, the aluminum alloy substrate prepared by the solid solution temperature of 495 ⁇ 5°C provided by the present invention and the aluminum alloy substrate prepared by the conventional solid solution temperature in Comparative Example 4 Compared with the SEM electron micrograph of the fracture surface of the material, the fracture surface of the aluminum alloy substrate prepared by the method provided by the present invention is a typical ductile fracture.
- the fracture surface of the aluminum alloy substrate prepared by the method of Comparative Example 4 has fewer dimples and is layered.
- the proportion of intergranular cracking increases, that is, the plasticity of the aluminum alloy substrate prepared by the method provided by the present invention is better than that of the aluminum alloy prepared in Comparative Example 4. gold substrate;
- Table 1 is the performance monitoring table of Examples 1-3:
- Table 2 is the performance monitoring table of Comparative Examples 1-4:
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Abstract
Description
Claims (4)
- 一种提升6016汽车冲压板包边性能的制造方法,其特征在于,包括以下制备过程:S1、配料,按以下重量百分比含量组分配制原料备用:Si=1.0%-1.05%,Fe=0.12%-0.2%,Cu≤0.02%,Mn=0.12%-0.2%,Mg=0.38%-0.45%,Cr≤0.002%,Zn≤0.02%,Ti=0.02%-0.025%,其他不可避免的单个元素≤0.05%,合计≤0.15%,余量为Al,Mn与Fe的比例控制为1∶1;S2、熔炼、铸造,将步骤S1中的原料置于熔炼炉中进行熔炼,再将熔体导入精炼炉中进行精炼后,再经过除气除渣后铸造成600-650mm厚的铝合金铸锭;S3、均匀化热处理,将步骤S2得到的铝合金铸锭经过锯切、铣面后置入加热炉中均匀化热处理,金属温度控制在565℃-570℃,保温15h;S4、热轧,将经过均匀化热处理后的铝合金铸锭进行多道次热轧得到8.0mm厚的热轧坯料;S5、冷轧,将S4中得到的8.0mm厚的热轧坯料采用高压大加工率进行第一道次的超细化轧制至4.0mm厚的第一冷轧坯料,然后将所述第一冷轧坯料按每道次25%-35%的加工率进行3-4道次的普通轧制得到第二冷轧坯料,最后将所述第二冷轧坯料按15%-20%的加工率冷轧至0.9-1.2mm的成品卷材;S6、固溶淬火和预时效处理,将所述成品卷材在连续式淬火线采用亚温固溶方式进行固溶淬火,对厚度0.9-1.2mm厚的成品卷材在固溶温度为495±5℃下,固溶保温时间2-3.5分钟,固溶淬火后在转移时间小于20秒的情况下进行水喷淋式淬火,水温低于35℃,水喷淋式淬火冷却速度在100℃/秒以上;水喷淋式淬火结束后在3分钟之内进行预时效处理,预时效温度为190±5℃,预时效保温时间为50~70秒,预时效炉出口处设置有多道风冷区,使预时效后的铝卷在出口收卷前料温降至45℃以下;S7、将经过S6处理的成品卷材经过拉矫、横剪后得到铝合金基材。
- 根据权利要求1所述的提升6016汽车冲压板包边性能的制造方法,其特征在于:所述S2中,进行熔铸时,严格控制金属及非金属化合物,流槽夹杂物含量<0.02mm2/kg,夹杂物尺寸小于12μm。
- 根据权利要求1所述的提升6016汽车冲压板包边性能的制造方法,其特征在于: 所述S3中,经过均匀化热处理后的铝合金铸锭的板条状β-AlFeSi相全部转化为颗粒状α-AlFeSi相。
- 根据权利要求1所述的提升6016汽车冲压板包边性能的制造方法,其特征在于:所述铝合金基材的抗拉强度200-215MPa,屈服强度90-110MPa,屈强比在0.5以下,断裂延伸率A50mm达24.0%以上;包边最小相对弯曲半径达0.5t以下且翻边形貌达一级形貌。
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