CN106191574B - A kind of preparation technology of 6 line aluminium alloy and its pre-stretching plate - Google Patents
A kind of preparation technology of 6 line aluminium alloy and its pre-stretching plate Download PDFInfo
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- CN106191574B CN106191574B CN201610728617.4A CN201610728617A CN106191574B CN 106191574 B CN106191574 B CN 106191574B CN 201610728617 A CN201610728617 A CN 201610728617A CN 106191574 B CN106191574 B CN 106191574B
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- 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
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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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
- C22F1/047—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 magnesium as the next major constituent
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Abstract
It is composed of the following components according to percentage by weight the invention discloses a kind of 6 line aluminium alloys：Mg, Mn, Si, Cr, Zr, Cu, Fe≤0.32%, Zn≤0.25%, Ti≤0.1%, other are Al and some inevitable impurity elements；The preparation technology of 6 line aluminium alloy pre-stretching plates：(1) 6 line aluminium alloy as described above is produced, is cast successively, evenly heating is handled, preheating；(2) hot rolling, cooling；(3) solution hardening, produce.The present invention prepares the technique of 6 line aluminium alloys and its pre-stretching plate, effectively improves sheet alloy intensity, improves alloy internal structure tissue and energy storage situation, crystal grain thinning, improve sheet alloy intensity and plasticity, reduces cracking during bending；Interact and influence step by step by the inventive method, can effectively control crystallite dimension, eliminate the rough orange peel line phenomenon of alloy plate face after stretching, improve sheet material mechanical performance and surface quality.
Description
Technical field
The present invention relates to the preparation technology of a kind of alloy and its pre-stretching plate, more particularly to a kind of 6 line aluminium alloys and its
The preparation technology of pre-stretching plate.
Background technology
6 line aluminium alloys be it is thermally treated, pre-stretching technique productions high-quality aluminum alloy product, its magnesium, silicon alloy characteristic
It is more, there are splendid, the excellent weld characteristicses of processing characteristics；After plating resistance excellent, good corrosion resistance, toughness height and processing not
Deformation；Material densification zero defect and the good characteristics such as it is easily polished.So that the alloy is widely used in machine components, structure work
The fields such as journey, modern architecture and communications and transportation, therefore be trend of the times for steel with aluminium in these fields, demand is big.
Traditional handicraft prepares 6 techniques for being T651 and had the disadvantages that：(1) it is not easy to second during alloy preparation technology
The control of phase content, the second mutually full and uniform precipitation is not easy to, causes performance relatively low and crystallite dimension abnormal growth；(2) alloy
Sheet deformation is uneven, and internal energy storage is uneven, so as to directly influence grain structure size, crystal grain group after solution hardening
Knit size abnormal growth；(3) surface orange peel shape lines is serious after sheet alloy stretching, influences sheet alloy outward appearance.Therefore, it is existing
The present needs a kind of crystal grain refinement badly, eliminates plate face no concave-convex is uneven after stretching orange peel line phenomenon, 6 systems of raising sheet alloy quality
The preparation technology of aluminium alloy and its pre-stretching plate.
The information for being disclosed in the background section is merely intended to understanding of the increase to the general background of the present invention, without answering
It has been the prior art well known to persons skilled in the art when being considered as recognizing or implying the information structure in any form.
The content of the invention
The present invention is directed to above-mentioned technical problem, invents a kind of preparation technology of 6 line aluminium alloy and its pre-stretching plate, it is intended to
There is provided it is a kind of ensure alloy property it is qualified, it is stable in the case of, by optimizing preparation technology, improving sheet alloy quality, disappear
Except the preparation technology of 6 line aluminium alloy pre-stretching plates of the orange peel lines phenomenon occurred after stretching.
To achieve the above object, technical scheme provided by the invention is as follows：
A kind of 6 line aluminium alloys, it is composed of the following components according to percentage by weight：Mg:0.9~1.3%, Mn:0.08~
0.25%, Si:0.52~0.9%, Cr:0.18~0.32%, Zr：0.005~0.12%, Cu:0.05~0.35%, Fe≤
0.32%, Zn≤0.25%, Ti≤0.1%, other are Al and some inevitable impurity elements.
A kind of preparation technology of 6 line aluminium alloy pre-stretching plate as described above, includes following operating procedure：
(1) 6 line aluminium alloys are produced, it is composed of the following components according to percentage by weight；Mg:0.9~1.3%, Mn:0.08
~0.25%, Si:0.52~0.9%, Cr:0.18~0.32%, Zr：0.005~0.12%, Cu:0.05~0.35%, Fe≤
0.32%, Zn≤0.25%, Ti≤0.1%, other are Al and some inevitable impurity elements, are then cast successively
Make, evenly heating is handled, preheating；
(2) 6 line aluminium alloys of gained carry out hot rolling after preheating in step (1), are rolled to finished product thickness, and thickness is 30~
160mm, 6 line aluminium alloy sheet materials are produced, are then cooled down；
(3) 6 line aluminium alloy sheet materials of gained carry out solution hardening after being cooled down in step (2), and gained 6 is aluminium after solution hardening
Sheet alloy carries out post-processing, produces.
Wherein, it is cast into the slab ingot for casting 400~700mm of thickness described in step (1).
Wherein, described in step (1) homogenize heat treatment temperature be 460 DEG C~570 DEG C, heating rate be 40~80 DEG C/
H, it is incubated 8~30h.
Wherein, the preheating described in step (1) is 420 DEG C~510 DEG C 2~25h of preheating.
Wherein, hot rolling percentage pass reduction 18~35% third from the bottom, 2~7m/s of mill speed in step (2)；It is second from the bottom
Percentage pass reduction 20~36%, 1~6m/s of mill speed；Last percentage pass reduction 24~38%, 0.8~5m/ of mill speed
s。
Wherein, the solution hardening described in step (3) is multistage solution hardening, i.e., is quickly heated using differential temperature, material liter
Warm speed is 40~120 DEG C/min, is warming up to 300~380 DEG C, is incubated 5~35min after reaching assigned temperature, then keeps thing
Material heating rate is 40~100 DEG C/min, is warming up to 500~550 DEG C, and 20~150min is incubated after reaching assigned temperature.
Wherein, the more detailed step of step (3) solution hardening is：
1. 6 line aluminium alloy sheet materials of gained after cooling are warming up into 200 DEG C, heating rate is more than 90 DEG C/min；
2. being warming up to 300~380 DEG C from 200 DEG C again, heating rate is 40~120 DEG C/min, and 5 are incubated at 300~380 DEG C
~35min；
3. being finally warming up to 500~550 DEG C from 300~380 DEG C, heating rate is 40~100 DEG C/min, 500~550
DEG C solid solution 20~150min.
Wherein, 3. step is realized by two stages：
Stage 1：6 line aluminium alloy sheet materials are warming up to T from 300~380 DEG C1After be incubated, heating rate be 40~100 DEG C/
Min, soaking time t1；
Stage 2：Again by 6 line aluminium alloy sheet materials from T1Temperature is incubated after being warming up to 500~550 DEG C, heating rate be 40~
100 DEG C/min, soaking time is 20~150min；Wherein T1For 420~460 DEG C, t1For 5~25min.
Wherein, the post-processing described in step (3) is：Step (4) stretches and step (5) Ageing Treatment；Wherein, it is described
Step (4) stretches, and amount of tension is 0.8~3.0%；Step (5) Ageing Treatment, treatment temperature are 165~185 DEG C, insulation
10~20h.
Compared with prior art, the present invention has the advantages that：
The present invention prepares the technique of 6 line aluminium alloys and its pre-stretching plate, by optimized alloy composition of the present invention, is added with
The trace element of benefit, adjustment suppresses the second phase constitution of grain structure abnormal growth, while rationally controls Mg, Si content, so as to
Reach the purpose for effectively improving sheet alloy intensity；The hot direct casting that the present invention uses simultaneously is made, and high-temperature homogenization heat treatment, can be subtracted
Few component segregation, fully separates out the second phase for suppressing abnormal grain growth；Furthermore the hot rolling technology of the present invention, optimize hot rolling
Percentage pass reduction, make the full and uniform deformation of sheet material, it is effective to improve alloy internal structure tissue and energy storage situation, crystal grain thinning,
Sheet alloy intensity and plasticity are improved, reduces cracking during bending；Multistage solution hardening technique in the present invention simultaneously, it is ensured that sheet material is high
Abnormal growth does not occur for internal grain tissue during temperature solid solution；Interact and influence step by step by the inventive method,
Can effectively control crystallite dimension, eliminate stretching after the rough orange peel line phenomenon of alloy plate face, improve sheet material mechanical performance and
Surface quality.
Brief description of the drawings
Fig. 1 is preparation technology flow chart of the present invention.
Fig. 2 is that the embodiment of the present invention 1 prepares 6 line aluminium alloy pre-stretching plate surface quality of gained and crystal size in alloy
Schematic diagram；Wherein, left figure is surface quality, and right figure is crystal size tissue in alloy.
Fig. 3 is that comparative example 1 prepares products obtained therefrom surface quality and crystal size schematic diagram in alloy；Wherein, left figure
For surface quality, right figure is crystal size tissue in alloy.
Fig. 4 is that comparative example 2 prepares crystal size schematic diagram in the product surface quality and alloy of gained；Wherein, it is left
Figure is surface quality, and right figure is crystal size tissue in alloy.
Fig. 5 is that comparative example 3 prepares products obtained therefrom surface quality and crystal size schematic diagram in alloy；Wherein, left figure
For surface quality, right figure is crystal size tissue in alloy.
Embodiment
Embodiment is described in detail below in conjunction with the accompanying drawings, it is to be understood that protection scope of the present invention not by
The limitation of embodiment.Min represents the minute of time, and h represents the hour of time.
Embodiment 1
A kind of preparation technology of 6 line aluminium alloy pre-stretching plate, operating procedure are as follows：
(1) 6 line aluminium alloys are produced, according to percentage by weight consisting of：Mg：1.22%, Mn：0.15%, Si：
0.72%, Cr：0.27%, Zr：0.11%, Cu：0.26%, Fe：0.25%, Zn：0.19%, Ti：0.09%, other be Al and
Some inevitable impurity elements, it is then deaerated, filtering after cast successively, evenly heating processing, preheating, that is, cast thickness
Spend 550mm slab ingot；Then slab ingot is subjected to evenly heating processing in the case where temperature is 515 DEG C, heating rate is 60 DEG C/h, and arrival refers to
Be incubated 19h after constant temperature degree, be cooled to room temperature, by the excision of gained slab ingot end to end with after peeling, to obtain thickness be 525~535mm
Slab ingot, 465 DEG C of preheating 13.5h of keeping temperature；
(2) 6 line aluminium alloy slab ingots of gained carry out hot rolling after step (1) is preheated, and are rolled to the slab of 70mm finished product thicknesses, heat
Roll percentage pass reduction 26.5% third from the bottom, mill speed 4.5m/s；Percentage pass reduction 28% second from the bottom, mill speed
3.5m/s；Last percentage pass reduction 31%, mill speed 2.9m/s, 6 line aluminium alloy sheet materials are produced, are then cooled down；
(3) 6 line aluminium alloy sheet materials of gained carry out solution hardening after being cooled down in step (2), i.e., are quickly heated using differential temperature,
6 line aluminium alloy sheet materials are warming up to 200 DEG C, heating rate is more than 90 DEG C/min；340 DEG C are warming up to from 200 DEG C again, heating rate
For 65 DEG C/min, 20min is incubated at 340 DEG C；525 DEG C are finally warming up to from 340 DEG C, heating rate is 70 DEG C/min, at 525 DEG C
Solid solution 80min (is warming up to T from 340 DEG C1After be incubated, heating rate is 70 DEG C/min, soaking time t1；Again by 6 line aluminium alloys
Sheet material is from T1Temperature is incubated after being warming up to 525 DEG C, and heating rate is 70 DEG C/min, soaking time 80min；Wherein T1For 440
DEG C, t1For 15min), rapid quenching to room temperature；
(4) stretch：By 6 line aluminium alloy plate stretchs of gained, amount of tension 1.9% after step (3) solution hardening；
(5) Ageing Treatment：6 line aluminium alloy sheet material keeping temperatures of gained are 175 DEG C after step (4) is stretched, and are incubated 15h's
Ageing Treatment, 6 line aluminium alloy pre-stretching plates are produced, are analyzed after finished product sawing, performance is as shown in table 1.
The 70mm heavy-gauge sheeting performance indications of table 1
| State | Rp0.2/MPa | Rm/MPa | A/% |
| 6061/T651- national standards | 240 | 290 | 9 |
| 6 systems/T651-3 | 301 | 332 | 17.5 |
As seen from Table 1, the technical scheme products obtained therefrom of the embodiment of the present invention 1, its performance is far beyond national standard；Soaking simultaneously,
The techniques such as hot rolling, solid solution, its plate surface is without orange peel shape lines phenomenon, and internal grain is tiny, about 60 μm of crystal grain, such as Fig. 2.
Embodiment 2
A kind of preparation technology of 6 line aluminium alloy pre-stretching plate, operating procedure are as follows：
(1) 6 line aluminium alloys are produced, according to percentage by weight consisting of：Mg：0.9%, Mn：0.08%, Si：0.52%,
Cr：0.18%, Zr：0.005%, Cu：0.05%, Fe：0.32%, Zn：0.25%, Ti：0.08%, other be Al and some not
Evitable impurity element, it is then deaerated, filtering after cast successively, evenly heating processing, preheating, that is, cast thickness
400mm slab ingot；Then slab ingot is subjected to evenly heating processing in the case where temperature is 460 DEG C, heating rate is 40 DEG C/h, reaches and specifies
After temperature be incubated 30h be cooled to room temperature, by gained slab ingot excision end to end with after peeling, obtain thickness be 380~390mm it is flat
Ingot, 420 DEG C of preheating 25h of keeping temperature；
(2) 6 line aluminium alloy slab ingots of gained carry out hot rolling after step (1) is preheated, and are rolled to the slab of 160mm finished product thicknesses,
Hot rolling percentage pass reduction 18% third from the bottom, mill speed 7m/s；Percentage pass reduction 20% second from the bottom, mill speed 6m/s；
Last percentage pass reduction 24%, mill speed 5m/s, 6 line aluminium alloy sheet materials are produced, are then cooled down；
(3) 6 line aluminium alloy sheet materials of gained carry out solution hardening after being cooled down in step (2), i.e., are quickly heated using differential temperature,
6 line aluminium alloy sheet materials are warming up to 200 DEG C, heating rate is more than 90 DEG C/min；300 DEG C are warming up to from 200 DEG C again, heating rate
For 40 DEG C/min, 35min is incubated at 300 DEG C；500 DEG C are finally warming up to from 300 DEG C, heating rate is 40 DEG C/min, at 500 DEG C
Solid solution 150min (is warming up to T from 300 DEG C1After be incubated, heating rate is 40 DEG C/min, soaking time t1；Again by 6 line aluminium alloys
Sheet material is from T1Temperature is incubated after being warming up to 500 DEG C, and heating rate is 40 DEG C/min, soaking time 150min；Wherein T1For 420
DEG C, t1For 25min), rapid quenching to room temperature；
(4) stretch：By 6 line aluminium alloy plate stretchs of gained, amount of tension 0.8% after step (3) solution hardening；
(5) Ageing Treatment：6 line aluminium alloy sheet material keeping temperatures of gained are 165 DEG C after step (4) is stretched, and are incubated 20h's
Ageing Treatment, produce 6 line aluminium alloy pre-stretching plates.
Embodiment 3
A kind of preparation technology of 6 line aluminium alloy pre-stretching plate, operating procedure are as follows：
(1) 6 line aluminium alloys are produced, according to percentage by weight consisting of：Mg：1.3%, Mn：0.25%, Si：0.9%,
Cr：0.32%, Zr：0.06%, Cu：0.35%, Fe：0.25%, Zn：0.19%, Ti：0.1%, other are Al and some can not
The impurity element avoided, it is then deaerated, filtering after cast successively, evenly heating processing, preheating, that is, cast thickness 700mm
Slab ingot；Then slab ingot is subjected to evenly heating processing in the case where temperature is 570 DEG C, heating rate is 80 DEG C/h, reaches assigned temperature
After be incubated 8h, be cooled to room temperature, by gained slab ingot excision end to end with after peeling, obtain thickness be 680~690mm slab ingot, protect
Hold 510 DEG C of preheating 2h of temperature；
(2) 6 line aluminium alloy slab ingots of gained carry out hot rolling after step (1) is preheated, and are rolled to the slab of 30mm finished product thicknesses, heat
Roll percentage pass reduction 35% third from the bottom, mill speed 2m/s；Percentage pass reduction 36% second from the bottom, mill speed 1m/s；Most
A time depresses 38%, mill speed 0.8m/s afterwards, produces 6 line aluminium alloy sheet materials, is then cooled down；
(3) 6 line aluminium alloy sheet materials of gained carry out solution hardening after being cooled down in step (2), i.e., are quickly heated using differential temperature,
6 line aluminium alloy sheet materials are warming up to 200 DEG C, heating rate is more than 90 DEG C/min；380 DEG C are warming up to from 200 DEG C again, heating rate
For 120 DEG C/min, 5min is incubated at 380 DEG C；550 DEG C are finally warming up to from 380 DEG C, heating rate is 100 DEG C/min, 550
DEG C solid solution 20min (be warming up to T from 380 DEG C1After be incubated, heating rate is 100 DEG C/min, soaking time t1；It is again that aluminium closes by 6
Golden plate material is from T1Temperature is incubated after being warming up to 550 DEG C, and heating rate is 100 DEG C/min, soaking time 20min；Wherein T1For
460 DEG C, t1For 5min), rapid quenching to room temperature；
(4) stretch：By 6 line aluminium alloy plate stretchs of gained, amount of tension 3.0% after step (3) solution hardening；
(5) Ageing Treatment：6 line aluminium alloy sheet material keeping temperatures of gained are 185 DEG C after step (4) is stretched, and are incubated 10h's
Ageing Treatment, produce 6 line aluminium alloy pre-stretching plates.
Comparative example 1
A kind of preparation technology of 6 line aluminium alloy pre-stretching plate, operating procedure are as follows：
(1) 6 line aluminium alloys are produced, according to percentage by weight consisting of：Mg：1.08%, Mn：0.12%, Si：
0.68%, Cr：0.27%, Zr：0.08%, Cu：0.26%, Fe：0.26%, Zn：0.21%, Ti：0.09%, other be Al and
Some inevitable impurity elements, it is then deaerated, filtering after cast successively, evenly heating processing, preheating, that is, cast thickness
Spend 550mm slab ingot；Then slab ingot is subjected to evenly heating processing in the case where temperature is 515 DEG C, heating rate is 60 DEG C/h, and arrival refers to
Be incubated 19h after constant temperature degree, be cooled to room temperature, by the excision of gained slab ingot end to end with after peeling, to obtain thickness be 525~535mm
Slab ingot, 465 DEG C of preheating 13.5h of keeping temperature；
(2) 6 line aluminium alloy slab ingots of gained carry out hot rolling after step (1) is preheated, and are rolled to the slab of 70mm finished product thicknesses, heat
Roll percentage pass reduction 15~17% third from the bottom, 3~4m/s of mill speed；Percentage pass reduction 17~20% second from the bottom, rolling
2~3.5m/s of speed；Last percentage pass reduction 19~22%, 1.5~2.5m/s of mill speed, 6 line aluminium alloy sheet materials are produced,
Then cooled down；
(3) 6 line aluminium alloy sheet materials of gained carry out solution hardening after being cooled down in step (2), i.e., are quickly heated using differential temperature,
6 line aluminium alloy sheet materials are warming up to 200 DEG C, heating rate is more than 90 DEG C/min；340 DEG C are warming up to from 200 DEG C again, heating rate
For 65 DEG C/min, 20min is incubated at 340 DEG C；525 DEG C are finally warming up to from 340 DEG C, heating rate is 70 DEG C/min, at 525 DEG C
Solid solution 80min (is warming up to T from 340 DEG C1After be incubated, heating rate is 70 DEG C/min, soaking time t1；Again by 6 line aluminium alloys
Sheet material is from T1Temperature is incubated after being warming up to 525 DEG C, and heating rate is 70 DEG C/min, soaking time 80min；Wherein T1For 440
DEG C, t1For 15min), rapid quenching to room temperature；
(4) stretch：By 6 line aluminium alloy plate stretchs of gained, amount of tension 1.9% after step (3) solution hardening；
(5) Ageing Treatment：6 line aluminium alloy sheet material keeping temperatures of gained are 175 DEG C after step (4) is stretched, and are incubated 15h's
Ageing Treatment, product is produced, is analyzed after finished product sawing, performance is as shown in table 2.
The 70mm heavy-gauge sheeting performance indications of table 2
| State | Rp0.2/MPa | Rm/MPa | A/% |
| 6061/T651- national standards | 240 | 290 | 9 |
| 6 systems/T651-1 | 289 | 321 | 18 |
As seen from Table 2, after being optimized in comparative example 1 to composition and combining the process of comparative example 1, gained
Its performance of product is far beyond national standard；But do not handled according to the hot rolling technology in the technology of the present invention, therefore, its sheet material table
There is heavier orange peel shape lines in face, and internal grain is larger, and about 230 μm of grain size, its product is as shown in Figure 3.
Comparative example 2
A kind of preparation technology of 6 line aluminium alloy pre-stretching plate, operating procedure are as follows：
(1) 6 line aluminium alloys are produced, according to percentage by weight consisting of：Mg：0.87%, Mn：0.05%, Si：
0.57%, Cr：0.12%, Zr：0.006%, Cu：0.26%, Fe：0.36%, Zn：0.20%, Ti：0.08%, other are Al
With some inevitable impurity elements, it is then deaerated, filtering after cast successively, evenly heating processing, preheating, that is, cast
Thickness 550mm slab ingot；Then slab ingot is subjected to evenly heating processing in the case where temperature is 515 DEG C, heating rate is 60 DEG C/h, is reached
19h is incubated after assigned temperature, is cooled to room temperature, by the excision of gained slab ingot end to end with after peeling, to obtain thickness be 525~535mm
Slab ingot, 465 DEG C of keeping temperature preheating 13.5h；
(2) 6 line aluminium alloy slab ingots of gained carry out hot rolling after step (1) is preheated, and are rolled to the slab of 70mm finished product thicknesses, heat
Roll percentage pass reduction 25~27% third from the bottom, 3~3.5m/s of mill speed；Percentage pass reduction 25~27% second from the bottom, rolls
1.5~3m/s of speed processed；Last percentage pass reduction 27~30%, 1.5~2.5m/s of mill speed, produce 6 line aluminium alloy plates
Material, then cooled down；
(3) 6 line aluminium alloy sheet materials of gained carry out solution hardening after being cooled down in step (2), i.e., are quickly heated using differential temperature,
6 line aluminium alloy sheet materials are warming up to 200 DEG C, heating rate is more than 90 DEG C/min；340 DEG C are warming up to from 200 DEG C again, heating rate
For 65 DEG C/min, 20min is incubated at 340 DEG C；525 DEG C are finally warming up to from 340 DEG C, heating rate is 70 DEG C/min, at 525 DEG C
Solid solution 80min (is warming up to T from 340 DEG C1After be incubated, heating rate is 70 DEG C/min, soaking time t1；Again by 6 line aluminium alloys
Sheet material is from T1Temperature is incubated after being warming up to 525 DEG C, and heating rate is 70 DEG C/min, soaking time 80min；Wherein T1For 440
DEG C, t1For 15min), rapid quenching to room temperature；
(4) stretch：By 6 line aluminium alloy plate stretchs of gained, amount of tension 1.9% after step (3) solution hardening；
(5) Ageing Treatment：6 line aluminium alloy sheet material keeping temperatures of gained are 175 DEG C after step (4) is stretched, and are incubated 15h's
Ageing Treatment, product is produced, is analyzed after finished product sawing, performance is as shown in table 3.
The 70mm heavy-gauge sheeting performance indications of table 3
| State | Rp0.2/MPa | Rm/MPa | A/% |
| 6061/T651- national standards | 240 | 290 | 9 |
| 6 systems/T651-1 | 261 | 312 | 15 |
As seen from Table 2, to other process parameter optimizings in comparative example 2, but not according to technical solution of the present invention pair
Composition optimizes, and performance can meet standard, but relatively low, and internal grain tissue is larger, about 370 μm of grain size, table
There is more serious orange peel lines defect in face, and its product is as shown in Figure 4.
Comparative example 3
It is alloy to produce 6, and Al-Mg-Si alloy is composed of the following components according to percentage by weight：Mg：0.86%, Mn：
0.07%, Si：0.59%, Cr：0.09%, Zr：0.008%, Cu：0.25%, Fe：0.39%, Zn：0.24%, Ti：
0.08%, the aluminium alloy of composition melting 6061, after deaerated, filtering, semi-continuous casting is carried out, cast out the slab ingot that thickness is 520mm.
By slab ingot in 480 ± 10 DEG C of soaking, 60 DEG C/h of heating rate, insulation 15h.It is 500mm by thickness after slab cut end tail and peeling
Slab ingot.By 450 DEG C of preheating 5h of slab ingot, slab, thickness 35mm, cooling are first rolled into.Sheet material is dissolved 50min at 530 DEG C, done
Single-stage is dissolved, and cools down post-tensioning 2.0%, 172 DEG C of insulation 12h of timeliness.Sheet material is analyzed after finished product sawing, performance such as table 4
It is shown.
The 35mm heavy-gauge sheeting performance indications of table 4
| State | Rp0.2/MPa | Rm/MPa | A/% |
| 6061/T651- national standards | 240 | 290 | 9 |
| Conventional 6061/T651-1 | 262 | 307 | 13.5 |
As seen from Table 4, composition, soaking, hot rolling etc. are not optimized, its performance is just met for national standard；Its sheet material table
There is serious orange peel line in face, and internal grain is thick, about 500 μm of crystal grain, such as Fig. 5.
The description of the foregoing specific illustrative embodiment to the present invention is to illustrate and the purpose of illustration.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can be much changed
And change.The purpose of selecting and describing the exemplary embodiment is that explain that the certain principles of the present invention and its reality should
With so that those skilled in the art can realize and utilize the present invention a variety of exemplaries and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (8)
1. a kind of 6 line aluminium alloy pre-stretching plates, it is characterised in that composed of the following components according to percentage by weight：Mg:0.9
~1.3%, Mn:0.08~0.25%, Si:0.52~0.9%, Cr:0.18~0.32%, Zr:0.005~0.12%, Cu:
0.05~0.35%, Fe≤0.32%, Zn≤0.25%, Ti≤0.1%, other are Al and some inevitable impurity members
Element；
Wherein, the preparation technology of the 6 line aluminium alloy pre-stretching plate, includes following operating procedure：
(1) 6 line aluminium alloys are produced, it is composed of the following components according to percentage by weight：Mg:0.9~1.3%, Mn:0.08~
0.25%, Si:0.52~0.9%, Cr:0.18~0.32%, Zr:0.005~0.12%, Cu:0.05~0.35%, Fe≤
0.32%, Zn≤0.25%, Ti≤0.1%, other are Al and some inevitable impurity elements, are then cast successively
Make, evenly heating is handled, preheating；
(2) 6 line aluminium alloys of gained carry out hot rolling after being preheated in step (1), are rolled to finished product thickness, are then cooled down；It is described
Hot rolling percentage pass reduction 18~35% third from the bottom, 2~7m/s of mill speed；Percentage pass reduction 20~36% second from the bottom, rolls
1~6m/s of speed processed；Last percentage pass reduction 24~38%, 0.8~5m/s of mill speed；
(3) 6 line aluminium alloys of gained carry out solution hardening after being cooled down in step (2)；
(4) resulting materials after solution hardening in step (3) are stretched；
(5) resulting materials carry out Ageing Treatment after step (4) is stretched, and produce.
2. 6 line aluminium alloy pre-stretching plate according to claim 1, it is characterised in that：Being cast into described in step (1)
Into 400~700mm of thickness slab ingot.
3. 6 line aluminium alloy pre-stretching plate according to claim 1, it is characterised in that：Homogenized described in step (1) at heat
It is 460 DEG C~570 DEG C to manage temperature, and heating rate is 40~80 DEG C/h, is incubated 8~30h.
4. 6 line aluminium alloy pre-stretching plate according to claim 1, it is characterised in that：Preheating described in step (1) is
420 DEG C~510 DEG C 2~25h of preheating.
5. 6 line aluminium alloy pre-stretching plate according to claim 1, it is characterised in that：Solution hardening described in step (3)
It is 40~120 DEG C/min for material heating rate, is warming up to 300~380 DEG C, is incubated 5~35min after reaching assigned temperature, so
It is 40~100 DEG C/min to keep material heating rate afterwards, is warming up to 500~550 DEG C, reach be incubated 20 after assigned temperature~
150min。
6. 6 line aluminium alloy pre-stretching plate according to claim 1, it is characterised in that step (3) solution hardening is more detailed
Step is：
1. 6 line aluminium alloys of gained after cooling are warming up into 200 DEG C, heating rate is more than 90 DEG C/min；
2. being warming up to 300~380 DEG C from 200 DEG C again, heating rate is 40~120 DEG C/min, 300~380 DEG C be incubated 5~
35min；
3. being finally warming up to 500~550 DEG C from 300~380 DEG C, heating rate is 40~100 DEG C/min, solid at 500~550 DEG C
Molten 20~150min.
7. 6 line aluminium alloy pre-stretching plate according to claim 6, it is characterised in that 3. step is realized by two stages：
Stage 1：6 line aluminium alloy sheet materials are warming up to T from 300~380 DEG C1After be incubated, heating rate is 40~100 DEG C/min, protect
The warm time is t1；
Stage 2：Again by 6 line aluminium alloys from T1Temperature is incubated after being warming up to 500~550 DEG C, and heating rate is 40~100 DEG C/min,
Soaking time is 20~150min；Wherein T1For 420~460 DEG C, t1For 5~25min.
8. 6 line aluminium alloy pre-stretching plate according to claim 1, it is characterised in that：Step (4) stretching, amount of tension
For 0.8~3.0%；Step (5) Ageing Treatment, treatment temperature are 165~185 DEG C, are incubated 10~20h.
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| CN109280822A (en) * | 2018-11-29 | 2019-01-29 | 天津忠旺铝业有限公司 | A kind of rail traffic 6082G aluminum alloy plate materials and its processing technology |
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| CN112126824B (en) * | 2020-10-09 | 2021-08-13 | 福建祥鑫股份有限公司 | Manufacturing method of 6-series container aluminum alloy section |
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