CN108385043A

CN108385043A - A kind of preparation method of 6016 aluminum alloy plate materials of body of a motor car

Info

Publication number: CN108385043A
Application number: CN201810182197.3A
Authority: CN
Inventors: 田妮; 刘启隆; 方兴; 赵紫研; 张豪; 赵刚; 左良
Original assignee: Northeastern University China
Current assignee: Northeastern University China
Priority date: 2018-03-06
Filing date: 2018-03-06
Publication date: 2018-08-10

Abstract

A kind of body of a motor car preparation method of 6016 aluminum alloy plate materials, includes the following steps：(1) 6016 aluminium alloy cast ingots are prepared；(2) 6016 aluminium alloy cast ingots are heated to 440~490 DEG C of heat preservation hot rollings, hot rolled plate is made；(3) by hot rolled plate at 470~550 DEG C, after keeping the temperature 2~6h, it is furnace-cooled to room temperature；(4) it carries out cold rolling and obtains cold-reduced sheet；(5) solution treatment is carried out；(6) it is placed at room temperature for 5~30min；(7) Pre-aging treatment is carried out；(8) 4 weeks or more are placed at room temperature for rolling plate after Pre-aging treatment.The present invention method can significantly shorten 6016 car body of aluminum alloy plates production procedure, it is energy saving, production cost is greatly lowered and the press formability and baking hardenability of sheet alloy can be improved simultaneously.

Description

A kind of preparation method of 6016 aluminum alloy plate materials of body of a motor car

Technical field

The invention belongs to Aluminum alloy for automotive body board technology fields, and in particular to a kind of body of a motor car is closed with 6016 aluminium The preparation method of golden plate material.

Background technology

Automotive light weight technology is current automobile industry important development direction.It is that automobile is light that aluminium alloy automobile plate, which substitutes autobody sheet, Quantify most effective approach.Current vehicle body aluminium alloy automobile plate mainly has 2xxx systems, 5xxx systems, 6xxx systems.6xxx systems aluminium closes Metallographic is respectively provided with good corrosion resistance and baking vanish hardening capacity, therefore 6xxx systems compared with 2xxx systems, 5xxx line aluminium alloys Aluminium alloy becomes aluminium alloy automobile plate main direction of studying；Currently, external aluminum car body large size timber-used aluminium alloy mainly uses 6xxx series alloys have 6009-T4P, 6010-T4P, 6111-T4P, 6016-T4P, 6022-T4P etc., wherein Europe is more adopted With 6016 aluminium alloys with preferable forming property.

6016 aluminium alloys can in solid solution, there is after water quenching lower yield strength, good punching performance, and subsequent Paint baking during intensity improved, excellent press formability and stronger baking vanish hardening capacity meet vapour very much The requirement of vehicle car body panel；6016 aluminum alloy plate materials have been used in the manufacture of the positions such as car door, vehicle window and body panels at present；So And the vehicle body prepared using traditional handicraft is the 2~4 of conventional automobile bodies steel plate with the production cost of 6016 aluminum alloy plate materials Times, and its deep drawability also has certain gap compared with low carbon steel plate, this seriously inhibits 6016 car body of aluminum alloy plates on automobile Large-scale application.Therefore, the production cost for reducing by 6016 car body of aluminum alloy plates is imperative.

Invention content

Present invention aims at a kind of preparation method of 6016 car body of aluminum alloy plates of body of a motor car is provided, in traditional processing Homogenization Treatments technique is saved on the basis of method, directly carries out hot rolling, to improve the deep drawability and baking hardening of sheet alloy Property, significantly shorten production procedure, it is energy saving, production cost is greatly reduced, while improve sheet alloy press formability and Baking hardenability.

The method of the present invention includes the following steps：

(1) prepared by ingot casting：6016 aluminium alloy cast ingots are prepared using semi-continuous casting method；

(2) hot rolling：By 6016 aluminium alloy cast ingots, 440~490 DEG C are heated to, keeps the temperature hot rolling after 2~6h, hot rolled plate is made, Thickness is 4~6mm；

(3) intermediate annealing：By hot rolled plate at 470~550 DEG C, after keeping the temperature 2~6h, it is furnace-cooled to room temperature, is rolled after obtaining furnace cooling Plate；

(4) cold rolling：Annealed state is rolled into plate, carries out cold rolling, cold-reduced sheet, 0.9~1.2mm of thickness is made；

(5) solution treatment：Solution treatment is carried out to cold-reduced sheet, rolls plate after forming solution treatment；The temperature of solution treatment is 535~550 DEG C, the time is 10~15min, and the type of cooling is water quenching to room temperature；

(6) it is placed at room temperature for：It is placed at room temperature for 5~30min to rolling plate after solution treatment；

(7) Pre-aging treatment：To rolling plate after being placed at room temperature for, Pre-aging treatment is carried out, rolls plate after forming Pre-aging treatment；In advance Aging temperature is 160~190 DEG C, and the time is 5~10min, and the type of cooling is to be air-cooled to room temperature；

(8) it is placed at room temperature for：To rolling plate after Pre-aging treatment, carries out being placed at room temperature for 4 weeks or more, body of a motor car is made with 6016 Aluminum alloy plate materials.

In the step (1), 6016 aluminium alloy cast ingots are by mass percentage：Si：0.90~1.40%, Mg：0.20 ~0.50%, Cu≤0.20%, Mn≤0.20%, Fe≤0.50%, Zn≤0.20%, Cr≤0.10%, Ti≤0.15% are miscellaneous Prime element≤0.15%, surplus Al.

6016 above-mentioned aluminium alloy cast ingot thickness be 190mm, hot rolling plate thickness be 4~6mm, Cold Rolled Plate Thickness 0.9~ 1.2mm。

In the step (1), 6016 aluminium alloy cast ingots are made using semi-continuous casting (DC castings).

In the step (2), 6016 aluminium alloy cast ingots before heating, through cropping milling surface treatment.

Above-mentioned body of a motor car is with the performance indicator of 6016 aluminum alloy plate materials：σ_0.2=108~113MPa, σ_b=225~ 232MPa, r₁₅=0.68~0.73, n (strain hardening exponent)=0.27~0.31, δ=27.0~27.9%, I_E=8.80~ 8.91mm。

Above-mentioned body of a motor car is with the performance indicator after the paint baking of 6016 aluminum alloy plate materials：σ_0.2=207~ 216MPa, σ_b=281~294MPa, δ=18.5~19.9%.

The hot rolling mode is that cross rolling is combined with longitudinally rolling, and course of hot rolling is first rolled along ingot casting width direction 3~5 passages are made, 9~13 passages is rolled then along slab ingot length direction, obtains hot rolled plate.

The traditional preparation methods of 6016 car body of aluminum alloy planks are usually all by semi-continuous casting (Direct Chill Casting, DC are cast) method prepares alloy cast ingot, then carry out high temperature it is long when Homogenization Treatments with reduce ingot casting component segregation, Dendritic segregation, generally above 535 DEG C of 6016 aluminium alloy cast ingot Homogenization Treatments temperature, soaking time is more than 12h, not only time-consuming Energy consumption, and production efficiency is seriously reduced, improve production cost；It is worth noting that, high-temperature homogenization processing can make conjunction Superfluous crystalline phase nodularization in gold, roughening are simultaneously distributed along dendrite boundary, it is possible to can reduce the press formability of follow-up plank； If using the direct hot rolling of no Homogenization Treatments, crystalline phase is broken under big deformation condition and tiny, disperse be distributed in base In body；By improving intermediate annealing process so that solvable phased soln, broken crystalline phase nodularization are conducive to the modeling for improving plank Property and forming property；Therefore using the technique of no Homogenization Treatments direct hot rolling change intermediate annealing can significantly reduce cost, Research work that is energy saving, shortening the production cycle, while optimizing sheet material forming performance has stronger innovative and very strong Scientific meaning and actual application value；The study found that by 6016 aluminium alloy cast ingot of semi-continuous casting without the direct hot rolling of uniform treatment Slab, then through 420 DEG C or so of conventional intermediate annealing process, then cold rolling, solid solution, Pre-aging treatment are prepared again plank With good baking hardenability but formability it is still not fully up to expectations；Deep study and analysis is found, although directly hot without uniform treatment 6016 aluminium sheets of superfluous crystalline phase particle fine uniform Dispersed precipitate can be obtained by rolling, but since intermediate anneal temperature is relatively low, Soaking time of annealing is shorter, and solvable phase is caused to be difficult in follow-up conventional solid solution processing procedure during complete back dissolving enters matrix, more main Want to be insoluble superfluous crystalline phase particle still have obvious wedge angle after the processing of conventional intermediate annealing process, fail to Apparent nodularization, this be cause to use at present fail to obtain without 6016 car body of aluminum alloy plates prepared by Homogenization Treatments technique it is excellent The critical issue of deep drawability；Further innovation experiment, continuous analysis and summary experimental result update experimental program, and the present invention carries Go out to break through conventional intermediate anneal temperature and combine the inventive concept that annealing soaking time is appropriately extended, develops novel low-cost system 6016 aluminium sheet fabricating technology of standby high deep drawing quality and high baking hardenability.

The preparation method of the present invention saves Homogenization Treatments technique on the basis of traditional diamond-making technique, directly carries out hot rolling； In order to promote solvable alloy phased soln and the nodularization of fragmentation surplus crystalline phase particle, boundary to tend to be round and smooth, to improve sheet alloy Deep drawability and baking hardenability, take on the basis of conventional intermediate annealing process (420~440 DEG C, 1~2h) further Improve the process that intermediate annealing soaking time is appropriately extended in intermediate anneal temperature simultaneously；This method can significantly shorten 6016 The production procedure of car body of aluminum alloy plate, it is energy saving, production cost is greatly lowered and sheet alloy can be improved simultaneously Press formability and baking hardenability.

Compared with the prior art, the advantages of the present invention are as follows：Plank is prepared using no Homogenization Treatments, it is energy saving, it carries High efficiency reduces production cost；It can implement on existing aluminium alloy production line, without changing existing tooling, it is not necessary to increase Equipment and technology investment, it is simple to operate feasible；Proper extension annealing soaking time is combined by improving intermediate anneal temperature, Make solvable crystallization phased soln, superfluous crystalline phase particle edges are round and smooth, nodularization, and 6016 aluminum alloy plate materials are improved simultaneously to final Press formability and baking vanish hardenability.Realize the depth that plank is improved while reducing by 6016 car body of aluminum alloy plate cost Punching performance and baking and hardening performance, the economic results in society brought therefrom are considerable.

Description of the drawings

Fig. 1 is optical microstructure's figure of 6016 aluminum alloy plate materials of body of a motor car made from the embodiment of the present invention 1；

Fig. 2 is optical microstructure's figure of 6016 aluminum alloy plate materials of body of a motor car made from comparative example 1 of the present invention.

Specific implementation mode

With reference to embodiment, the present invention is described in further detail.

6016 aluminum alloy plate materials supply of material state performance index and baking vanish made from the embodiment of the present invention 1~27 and comparative example 1 Treated, and performance indicator is shown in Table 1.

The performance after 6016 aluminum alloy plate materials supply of material state performance index and paint baking is made in 1 embodiment and comparative example of table Index

There is good forming property by 6016 aluminum alloy plate materials that the 1 visible present invention of table prepares, through simulating baking vanish Show good baking hardenability afterwards, hence it is evident that better than comparative example 1 by 6016 conventionally produced aluminum alloy plate materials at Shape index and baking vanish hardenability index.

It is GB/T228-2002 that tension test accepted standard is carried out in the embodiment of the present invention and comparative example 1《Metal material Tensile testing at ambient temperature》.

It is GB/T4156-2007 that cupping test accepted standard is carried out in the embodiment of the present invention and comparative example 1《Metal cupping Experimental method》.

Paint baking in the embodiment of the present invention 1~27 be after 2% predeformation, then in drying box carry out 170 DEG C × The simulation baking vanish of 30min heats, and then measures its intensity.

Paint baking in comparative example 1 of the present invention be after 2% predeformation, then in drying box carry out 170 DEG C × 30min Simulation baking vanish heat treatment, then measure its intensity.

6016 aluminium alloy cast ingots are made using direct water-cooling semi-continuous casting (DC castings) in the embodiment of the present invention and comparative example 1 .

In the embodiment of the present invention and comparative example 1 6016 aluminium alloy cast ingots before heating, through cropping milling surface treatment.

Hot rolling mode in the embodiment of the present invention and comparative example 1 is that cross rolling is combined with longitudinally rolling, course of hot rolling 3~5 passages first are rolled along ingot casting width direction, 9~13 passages is rolled then along slab ingot length direction, obtains hot rolled plate Material.

The equipment that solution treatment and Pre-aging treatment use in the embodiment of the present invention is resistance furnace.

Embodiment 1

A kind of body of a motor car preparation method of 6016 aluminum alloy plate materials, includes the following steps：

(1) prepared by ingot casting：6016 aluminium alloy cast ingots are prepared using semi-continuous casting；

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 440 DEG C in recycling wind furnace, keeps the temperature 2h Hot rolling afterwards, hot rolling mode is first to roll 4 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 11 It is secondary, it is rolled into the hot rolled plate that thickness is 4mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 470 DEG C in recycling wind furnace, after keeping the temperature 2h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(4) cold rolling：Annealed state is rolled into plate and carries out cold rolling, cold-reduced sheet is made；Wherein, Cold Rolled Plate Thickness 1.0mm；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 540 DEG C, Soaking time is 13min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(6) it is placed at room temperature for：It is placed at room temperature for 5min to rolling plate after solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 170 DEG C, The Pre-aging treatment time is 6min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

(8) it is placed at room temperature for：Plate will be rolled after Pre-aging treatment, be placed at room temperature for 4 weeks or more, as T4P states, 6016- is made T4P aluminum alloy plate materials, optical microstructure are as shown in Figure 1.

Stretching and cupping test are carried out to 6016 aluminum alloy plate materials made from the present embodiment, and to made from the present embodiment 6016 aluminum alloy plate materials are after 2% predeformation, then the simulation baking vanish of 170 DEG C × 30min of progress heats in drying box, with After measure its intensity；Related performance indicators data are shown in Table 1.

Comparative example 1

(2) it homogenizes：6016 aluminium alloy cast ingots are fitted into cycle wind furnace, are warming up to 550 DEG C of heat preservations for 24 hours with stove within 2 hours Afterwards, it comes out of the stove and is air-cooled to room temperature；

(3) hot rolling：After 6022 aluminium alloy cast ingot after cooling is cut off milling surface treatment, 440 DEG C are heated to, keeps the temperature heat after 2h It rolls, hot rolling system is first to roll 4 passages along rectangle ingot width direction, and 11 passages are rolled then along rectangle ingot length direction, It is rolled into the hot rolled plate that thickness is 4mm；

(4) intermediate annealing：After hot rolled plate is cut scale, it is heated to 430 DEG C in recycling wind furnace, after keeping the temperature 2h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) cold rolling：Annealed state is rolled into plate and carries out cold rolling, cold-reduced sheet is made；Wherein, Cold Rolled Plate Thickness 1.0mm；

(6) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 535 DEG C, Soaking time is 15min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(7) it is placed at room temperature for：It is placed at room temperature for 18min to rolling plate after solution treatment；

(8) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 180 DEG C, The Pre-aging treatment time is 5min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

(9) it is placed at room temperature for：Plate will be rolled after Pre-aging treatment, be placed at room temperature for 4 weeks or more, as T4P states, 6016- is made T4P aluminum alloy plate materials, optical microstructure are as shown in Figure 2；

Stretching and cupping test are carried out to 6016 aluminum alloy plate materials made from this comparative example, and to made from this comparative example 6016 aluminum alloy plate materials are after 2% predeformation, then the simulation baking vanish of 170 DEG C × 30min of progress heats in drying box, with After measure its intensity；Related performance indicators data are shown in Table 1.

Embodiment 2

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 440 DEG C in recycling wind furnace, keeps the temperature 6h Hot rolling afterwards, hot rolling mode is first to roll 4 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 10 It is secondary, it is rolled into the hot rolled plate that thickness is 5mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 470 DEG C in recycling wind furnace, after keeping the temperature 5h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(4) cold rolling：Annealed state is rolled into plate and carries out cold rolling, cold-reduced sheet is made；Wherein, Cold Rolled Plate Thickness 0.9mm；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 538 DEG C, Soaking time is 11min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(6) it is placed at room temperature for：It is placed at room temperature for 8min to rolling plate after solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 170 DEG C, The Pre-aging treatment time is 5min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

(8) it is placed at room temperature for：Plate will be rolled after Pre-aging treatment, be placed at room temperature for 4 weeks or more, as T4P states, 6016- is made T4P aluminum alloy plate materials；

Embodiment 3

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 450 DEG C in recycling wind furnace, keeps the temperature 3h Hot rolling afterwards, hot rolling mode is first to roll 3 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 12 It is secondary, it is rolled into the hot rolled plate that thickness is 4mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 475 DEG C in recycling wind furnace, after keeping the temperature 2h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 536 DEG C, Soaking time is 10min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(6) it is placed at room temperature for：It is placed at room temperature for 20min to rolling plate after solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 170 DEG C, The Pre-aging treatment time is 7min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 4

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 450 DEG C in recycling wind furnace, keeps the temperature 4h Hot rolling afterwards, hot rolling mode is first to roll 5 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 11 It is secondary, it is rolled into the hot rolled plate that thickness is 6mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 475 DEG C in recycling wind furnace, after keeping the temperature 6h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(4) cold rolling：Annealed state is rolled into plate and carries out cold rolling, cold-reduced sheet is made；Wherein, Cold Rolled Plate Thickness 1.1mm；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 542 DEG C, Soaking time is 15min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(6) it is placed at room temperature for：It is placed at room temperature for 16min to rolling plate after solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 165 DEG C, The Pre-aging treatment time is 10min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 5

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 460 DEG C in recycling wind furnace, keeps the temperature 3h Hot rolling afterwards, hot rolling mode is first to roll 3 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 12 It is secondary, it is rolled into the hot rolled plate that thickness is 5mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 480 DEG C in recycling wind furnace, after keeping the temperature 2h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 543 DEG C, Soaking time is 15min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 165 DEG C, The Pre-aging treatment time is 9min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 6

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 460 DEG C in recycling wind furnace, keeps the temperature 4h Hot rolling afterwards, hot rolling mode is first to roll 4 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 9 It is secondary, it is rolled into the hot rolled plate that thickness is 4mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 480 DEG C in recycling wind furnace, after keeping the temperature 5h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(4) cold rolling：Annealed state is rolled into plate and carries out cold rolling, cold-reduced sheet is made；Wherein, Cold Rolled Plate Thickness 1.2mm；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 550 DEG C, Soaking time is 10min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(6) it is placed at room temperature for：It is placed at room temperature for 23min to rolling plate after solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 190 DEG C, The Pre-aging treatment time is 5min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 7

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 470 DEG C in recycling wind furnace, keeps the temperature 2h Hot rolling afterwards, hot rolling mode is first to roll 4 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 11 It is secondary, it is rolled into the hot rolled plate that thickness is 4mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 485 DEG C in recycling wind furnace, after keeping the temperature 3h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 540 DEG C, Soaking time is 14min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(6) it is placed at room temperature for：It is placed at room temperature for 25min to rolling plate after solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 185 DEG C, The Pre-aging treatment time is 10min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 8

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 470 DEG C in recycling wind furnace, keeps the temperature 6h Hot rolling afterwards, hot rolling mode is first to roll 4 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 10 It is secondary, it is rolled into the hot rolled plate that thickness is 4mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 485 DEG C in recycling wind furnace, after keeping the temperature 4h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 535 DEG C, Soaking time is 10min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(6) it is placed at room temperature for：It is placed at room temperature for 19min to rolling plate after solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 175 DEG C, The Pre-aging treatment time is 6min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 9

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 480 DEG C in recycling wind furnace, keeps the temperature 3h Hot rolling afterwards, hot rolling mode is first to roll 4 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 11 It is secondary, it is rolled into the hot rolled plate that thickness is 5mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 490 DEG C in recycling wind furnace, after keeping the temperature 2h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 535 DEG C, Soaking time is 13min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 160 DEG C, The Pre-aging treatment time is 5min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 10

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 480 DEG C in recycling wind furnace, keeps the temperature 2h Hot rolling afterwards, hot rolling mode is first to roll 4 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 11 It is secondary, it is rolled into the hot rolled plate that thickness is 5mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 490 DEG C in recycling wind furnace, after keeping the temperature 5h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 535 DEG C, Soaking time is 12min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 180 DEG C, The Pre-aging treatment time is 10min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 11

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 490 DEG C in recycling wind furnace, keeps the temperature 6h Hot rolling afterwards, hot rolling mode is first to roll 5 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 13 It is secondary, it is rolled into the hot rolled plate that thickness is 5mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 495 DEG C in recycling wind furnace, after keeping the temperature 3h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 535 DEG C, Soaking time is 15min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(6) it is placed at room temperature for：It is placed at room temperature for 10min to rolling plate after solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 180 DEG C, The Pre-aging treatment time is 8min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 12

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 490 DEG C in recycling wind furnace, keeps the temperature 5h Hot rolling afterwards, hot rolling mode is first to roll 5 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 13 It is secondary, it is rolled into the hot rolled plate that thickness is 6mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 495 DEG C in recycling wind furnace, after keeping the temperature 6h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 541 DEG C, Soaking time is 10min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 160 DEG C, The Pre-aging treatment time is 10min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 13

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 440 DEG C in recycling wind furnace, keeps the temperature 4h Hot rolling afterwards, hot rolling mode is first to roll 5 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 12 It is secondary, it is rolled into the hot rolled plate that thickness is 5mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 500 DEG C in recycling wind furnace, after keeping the temperature 4h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 540 DEG C, Soaking time is 15min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 170 DEG C, The Pre-aging treatment time is 8min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 14

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 440 DEG C in recycling wind furnace, keeps the temperature 3h Hot rolling afterwards, hot rolling mode is first to roll 4 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 11 It is secondary, it is rolled into the hot rolled plate that thickness is 4mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 500 DEG C in recycling wind furnace, after keeping the temperature 6h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 175 DEG C, The Pre-aging treatment time is 10min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 15

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 450 DEG C in recycling wind furnace, keeps the temperature 2h Hot rolling afterwards, hot rolling mode is first to roll 4 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 12 It is secondary, it is rolled into the hot rolled plate that thickness is 5mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 505 DEG C in recycling wind furnace, after keeping the temperature 2h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(6) it is placed at room temperature for：It is placed at room temperature for 13min to rolling plate after solution treatment；

Embodiment 16

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 450 DEG C in recycling wind furnace, keeps the temperature 5h Hot rolling afterwards, hot rolling mode is first to roll 4 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 11 It is secondary, it is rolled into the hot rolled plate that thickness is 5mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 505 DEG C in recycling wind furnace, after keeping the temperature 6h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 545 DEG C, Soaking time is 12min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(6) it is placed at room temperature for：It is placed at room temperature for 27min to rolling plate after solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 175 DEG C, The Pre-aging treatment time is 9min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 17

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 460 DEG C in recycling wind furnace, keeps the temperature 6h Hot rolling afterwards, hot rolling mode is first to roll 5 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 12 It is secondary, it is rolled into the hot rolled plate that thickness is 4mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 510 DEG C in recycling wind furnace, after keeping the temperature 2h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 185 DEG C, The Pre-aging treatment time is 8min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 18

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 460 DEG C in recycling wind furnace, keeps the temperature 2h Hot rolling afterwards, hot rolling mode is first to roll 4 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 9 It is secondary, it is rolled into the hot rolled plate that thickness is 4mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 510 DEG C in recycling wind furnace, after keeping the temperature 6h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(6) it is placed at room temperature for：It is placed at room temperature for 30min to rolling plate after solution treatment；

Embodiment 19

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 470 DEG C in recycling wind furnace, keeps the temperature 3h Hot rolling afterwards, hot rolling mode is first to roll 5 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 9 It is secondary, it is rolled into the hot rolled plate that thickness is 5mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 515 DEG C in recycling wind furnace, after keeping the temperature 3h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

Embodiment 20

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 470 DEG C in recycling wind furnace, keeps the temperature 5h Hot rolling afterwards, hot rolling mode is first to roll 5 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 10 It is secondary, it is rolled into the hot rolled plate that thickness is 4mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 515 DEG C in recycling wind furnace, after keeping the temperature 5h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 540 DEG C, Soaking time is 10min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(6) it is placed at room temperature for：It is placed at room temperature for 26min to rolling plate after solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 170 DEG C, The Pre-aging treatment time is 10min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 21

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 480 DEG C in recycling wind furnace, keeps the temperature 4h Hot rolling afterwards, hot rolling mode is first to roll 4 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 11 It is secondary, it is rolled into the hot rolled plate that thickness is 6mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 520 DEG C in recycling wind furnace, after keeping the temperature 4h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 545 DEG C, Soaking time is 11min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(6) it is placed at room temperature for：It is placed at room temperature for 21min to rolling plate after solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 175 DEG C, The Pre-aging treatment time is 5min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 22

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 480 DEG C in recycling wind furnace, keeps the temperature 6h Hot rolling afterwards, hot rolling mode is first to roll 3 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 13 It is secondary, it is rolled into the hot rolled plate that thickness is 4mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 520 DEG C in recycling wind furnace, after keeping the temperature 6h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 535 DEG C, Soaking time is 14min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 180 DEG C, The Pre-aging treatment time is 7min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 23

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 490 DEG C in recycling wind furnace, keeps the temperature 2h Hot rolling afterwards, hot rolling mode is first to roll 3 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 12 It is secondary, it is rolled into the hot rolled plate that thickness is 4.5mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 525 DEG C in recycling wind furnace, after keeping the temperature 3h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(6) it is placed at room temperature for：10min is put to rolling plate room temperature after solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 165 DEG C, The Pre-aging treatment time is 8min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 24

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 490 DEG C in recycling wind furnace, keeps the temperature 4h Hot rolling afterwards, hot rolling mode is first to roll 3 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 11 It is secondary, it is rolled into the hot rolled plate that thickness is 5mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 530 DEG C in recycling wind furnace, after keeping the temperature 5h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

Embodiment 25

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 450 DEG C in recycling wind furnace, keeps the temperature 6h Hot rolling afterwards, hot rolling mode is first to roll 4 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 12 It is secondary, it is rolled into the hot rolled plate that thickness is 4.5mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 540 DEG C in recycling wind furnace, after keeping the temperature 3h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(6) it is placed at room temperature for：It is placed at room temperature for 9min to rolling plate after solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 190 DEG C, The Pre-aging treatment time is 8min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 26

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 470 DEG C in recycling wind furnace, keeps the temperature 4h Hot rolling afterwards, hot rolling mode is first to roll 5 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 11 It is secondary, it is rolled into the hot rolled plate that thickness is 4.6mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 550 DEG C in recycling wind furnace, after keeping the temperature 3h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 550 DEG C, Soaking time is 15min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

(7) Pre-aging treatment：To rolling plate, progress Pre-aging treatment after being placed at room temperature for, pre-ageing treatment temperature is 190 DEG C, The Pre-aging treatment time is 6min, and the type of cooling is to be air-cooled to room temperature, is formed after Pre-aging treatment and rolls plate；

Embodiment 27

(2) hot rolling：After 6016 aluminium alloy cast ingots are cut off milling surface treatment, it is heated to 480 DEG C in recycling wind furnace, keeps the temperature 5h Hot rolling afterwards, hot rolling mode is first to roll 5 passages along rectangle ingot width direction, then along rectangle ingot length direction rolling 12 It is secondary, it is rolled into the hot rolled plate that thickness is 5mm；

(3) intermediate annealing：After hot rolled plate is cut scale, it is heated to 550 DEG C in recycling wind furnace, after keeping the temperature 6h, is furnace-cooled to Room temperature obtains annealed state and rolls plate；

(5) solution treatment：Solution treatment is carried out in salt bath furnace to cold-reduced sheet, the heating temperature of solution treatment is 540 DEG C, Soaking time is 12min, and the type of cooling is water quenching to room temperature, rolls plate after forming solution treatment；

Claims

1. a kind of body of a motor car preparation method of 6016 aluminum alloy plate materials, it is characterised in that include the following steps：

(1) prepared by ingot casting：Prepare 6016 aluminium alloy cast ingots；

(2) hot rolling：By 6016 aluminium alloy cast ingots, 440~490 DEG C are heated to, keeps the temperature hot rolling after 2~6h, hot rolled plate, thickness is made For 4~6mm；

(3) intermediate annealing：By hot rolled plate at 470~550 DEG C, after keeping the temperature 2~6h, it is furnace-cooled to room temperature, rolls plate after obtaining furnace cooling；

(5) solution treatment：Solution treatment is carried out to cold-reduced sheet, rolls plate after forming solution treatment；The temperature of solution treatment be 535~ 550 DEG C, the time is 10~15min, and the type of cooling is water quenching to room temperature；

(7) Pre-aging treatment：To rolling plate after being placed at room temperature for, Pre-aging treatment is carried out, rolls plate after forming Pre-aging treatment；Preageing Treatment temperature is 160~190 DEG C, and the time is 5~10min, and the type of cooling is to be air-cooled to room temperature；

(8) it is placed at room temperature for：To rolling plate after Pre-aging treatment, carries out being placed at room temperature for 4 weeks or more, body of a motor car is made and is closed with 6016 aluminium Golden plate material.

2. a kind of preparation method of 6016 aluminum alloy plate materials of body of a motor car according to claim 1, it is characterised in that institute 6016 aluminium alloy cast ingots stated are by mass percentage：Si：0.90~1.40%, Mg：0.20~0.50%, Cu≤0.20%, Mn≤0.20%, Fe≤0.50%, Zn≤0.20%, Cr≤0.10%, Ti≤0.15%, impurity element≤0.15%, surplus For Al.

3. a kind of preparation method of 6016 aluminum alloy plate materials of body of a motor car according to claim 1, it is characterised in that institute 6016 aluminium alloy cast ingots stated are made using semi-continuous casting.

4. a kind of preparation method of 6016 aluminum alloy plate materials of body of a motor car according to claim 1, it is characterised in that institute 6016 aluminium alloy cast ingots stated before heating, through cropping milling surface treatment.Hot rolling mode is that cross rolling is mutually tied with longitudinal rolling It closing, course of hot rolling first rolls 3~5 passages along ingot casting width direction, and 9~13 passages are rolled then along slab ingot length direction, Obtain hot rolled plate.

5. a kind of preparation method of 6016 aluminum alloy plate materials of body of a motor car according to claim 1, it is characterised in that institute The 6016 aluminium alloy cast ingot thickness stated are 190mm, and hot rolling plate thickness is 4~6mm, 0.9~1.2mm of Cold Rolled Plate Thickness.

6. a kind of preparation method of 6016 aluminum alloy plate materials of body of a motor car according to claim 1, it is characterised in that institute The body stated is with the performance indicator of 6009 aluminum alloy plate materials：σ_0.2=108~113MPa, σ_b=225~232MPa, r₁₅=0.68 ~0.73, n (strain hardening exponent)=0.27~0.31, δ=27.0~27.9%, I_E=8.80~8.91mm.

7. a kind of preparation method of 6016 aluminum alloy plate materials of body of a motor car according to claim 1, it is characterised in that institute The body of a motor car stated is with the performance indicator after the paint baking of 6009 aluminum alloy plate materials：σ_0.2=207~216MPa, σ_b=281 ~294MPa, δ=18.5~19.9%.