CN106191574A - A kind of 6 line aluminium alloys and the preparation technology of pre-stretching plate thereof - Google Patents
A kind of 6 line aluminium alloys and the preparation technology of pre-stretching plate thereof Download PDFInfo
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- CN106191574A CN106191574A CN201610728617.4A CN201610728617A CN106191574A CN 106191574 A CN106191574 A CN 106191574A CN 201610728617 A CN201610728617 A CN 201610728617A CN 106191574 A CN106191574 A CN 106191574A
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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
Abstract
The invention discloses a kind of 6 line aluminium alloys, composed of the following components according to percentage by weight: 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) produces 6 line aluminium alloys described above, carries out casting, evenly heating processes, preheating successively；(2) hot rolling, cooling；(3) solution hardening, to obtain final product.The present invention prepares the technique of 6 line aluminium alloys and pre-stretching plate thereof, is effectively improved sheet alloy intensity, improves alloy internal structure tissue and energy storage situation, crystal grain thinning, improves sheet alloy intensity and plasticity, reduces cracking during bending；Interacted step by step by the inventive method and affect, can effectively control crystallite dimension, eliminate alloy sheets face rough Pericarpium Citri tangerinae stricture of vagina phenomenon 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 pre-stretching plate thereof, particularly to a kind of 6 line aluminium alloys and
The preparation technology of pre-stretching plate.
Background technology
6 line aluminium alloys are thermally treated, the high-quality aluminum alloy products of prestretched technique production, its magnesium, silicon alloy characteristic
Many, there is the weld characteristics that processing characteristics is splendid, excellent；After plating resistance excellent, good corrosion resistance, toughness height and processing not
Deformation；Material densification zero defect and the good characteristics such as be easily polished.This alloy is made to be widely used in machine components, structure work
The fields such as journey, modern architecture and transportation, are therefore trend of the times with aluminum for steel in these fields, and demand is big.
It is to be not easy to second during the technique of T651 has the disadvantages that (1) alloy preparation technology that traditional handicraft prepares 6
The control of phase content, it is not easy to the second mutually full and uniform precipitation, causes performance on the low side and crystallite dimension abnormal growth；(2) alloy
Sheet deformation is uneven, and internal energy storage is uneven, thus grain structure size, crystal grain group after directly influencing solution hardening
Knit size abnormal growth；(3) this sheet alloy stretching rear surface Pericarpium Citri tangerinae shape lines is serious, affects sheet alloy outward appearance.Therefore, existing
The present needs the refinement of a kind of crystal grain badly, elimination stretches the uneven Pericarpium Citri tangerinae stricture of vagina phenomenon of back plate face no concave-convex, improve the 6 of sheet alloy quality is
Aluminium alloy and the preparation technology of pre-stretching plate thereof.
The information being disclosed in this background section is merely intended to increase the understanding of the general background to the present invention, and should not
When being considered to recognize or imply in any form this information structure prior art well known to persons skilled in the art.
Summary of the invention
The present invention is directed to above-mentioned technical problem, invent a kind of 6 line aluminium alloys and the preparation technology of pre-stretching plate thereof, it is intended to
There is provided a kind of in the case of guaranteeing that alloy property is qualified, stable, by optimizing preparation technology, raising sheet alloy quality, disappearing
Preparation technology except 6 line aluminium alloy pre-stretching plates of the Pericarpium Citri tangerinae lines phenomenon occurred after stretching.
For achieving the above object, the technical scheme that the present invention provides is as follows:
A kind of 6 line aluminium alloys, 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.
The preparation technology of a kind of 6 line aluminium alloy pre-stretching plates described above, comprises following operating procedure:
(1) producing 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, cast the most successively
Make, evenly heating processes, preheating；
(2) gained 6 line aluminium alloy after preheating in step (1) is carried out hot rolling, is rolled to finished product thickness, thickness be 30～
160mm, obtains 6 line aluminium alloy sheet materials, then cools down；
(3) gained 6 line aluminium alloy sheet material after cooling in step (2) being carried out solution hardening, after solution hardening, gained 6 is aluminum
Sheet alloy carries out later stage process, to obtain final product.
Wherein, being cast into described in step (1) casts the slab ingot of thickness 400～700mm.
Wherein, homogenization heat treatment temperature described in step (1) is 460 DEG C～570 DEG C, heating rate is 40～80 DEG C/
H, is incubated 8～30h.
Wherein, the preheating described in step (1) is 420 DEG C～510 DEG C preheatings 2～25h.
Wherein, hot rolling percentage pass reduction third from the bottom 18～35% in step (2), mill speed 2～7m/s；Second from the bottom
Percentage pass reduction 20～36%, mill speed 1～6m/s；Last percentage pass reduction 24～38%, mill speed 0.8～5m/
s。
Wherein, the solution hardening described in step (3) is multistage solution hardening, i.e. uses differential temperature quickly to heat, material liter
Temperature speed is 40～120 DEG C/min, is warming up to 300～380 DEG C, is incubated 5～35min, then keeps thing after reaching assigned temperature
Material heating rate is 40～100 DEG C/min, is warming up to 500～550 DEG C, is incubated 20～150min after reaching assigned temperature.
Wherein, the more detailed step of step (3) solution hardening is:
1. gained after cooling 6 line aluminium alloy sheet material being warming up to 200 DEG C, heating rate is more than 90 DEG C/min；
Being warming up to 300～380 DEG C from 200 DEG C the most again, heating rate is 40～120 DEG C/min, is incubated 5 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 C1Rear insulation, heating rate is 40～100 DEG C/
Min, temperature retention time is 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, temperature retention time is 20～150min；Wherein T1It is 420～460 DEG C, t1It is 5～25min.
Wherein, the later stage described in step (3) is processed as: step (4) stretching and step (5) Ageing Treatment；Wherein, described
Step (4) stretches, and amount of tension is 0.8～3.0%；Described step (5) Ageing Treatment, treatment temperature is 165～185 DEG C, insulation
10～20h.
Compared with prior art, there is advantages that
The present invention prepares the technique of 6 line aluminium alloys and pre-stretching plate thereof, by optimized alloy composition of the present invention, is added with
The trace element of benefit, the second phase constitution of adjustment suppression grain structure abnormal growth, conservative control Mg, Si content simultaneously, thus
Reach to be effectively improved the purpose of sheet alloy intensity；The hot top casting that the present invention uses simultaneously, high-temperature homogenization heat treatment, can subtract
Few component segregation, fully separates out the second phase of suppression abnormal grain growth；Furthermore the hot rolling technology of the present invention, optimizes hot rolling
Percentage pass reduction, makes the full and uniform deformation of sheet material, effectively improves alloy internal structure tissue and energy storage situation, crystal grain thinning,
Improve sheet alloy intensity and plasticity, reduce cracking during bending；Multistage solution hardening technique in the present invention simultaneously, it is ensured that sheet material is high
During temperature solid solution there is not abnormal growth in internal grain tissue；Interacted step by step by the inventive method and affect,
Can effectively control crystallite dimension, eliminate stretching after alloy sheets face rough Pericarpium Citri tangerinae stricture of vagina phenomenon, improve sheet material mechanical performance and
Surface quality.
Accompanying drawing explanation
Fig. 1 is preparation technology flow chart of the present invention.
Fig. 2 is that the embodiment of the present invention 1 prepares gained 6 line aluminium alloy pre-stretching plate surface quality 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, Zuo Tu
For surface quality, right figure is crystal size tissue in alloy.
Fig. 4 is product surface quality and the crystal size schematic diagram in alloy that comparative example 2 prepares gained；Wherein, 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, Zuo Tu
For surface quality, right figure is crystal size tissue in alloy.
Detailed description of the invention
Detailed description of the invention is described in detail below in conjunction with the accompanying drawings, it is to be understood that protection scope of the present invention is not subject to
The restriction of detailed description of the invention.Min express time minute, h express time hour.
Embodiment 1
A kind of preparation technology of 6 line aluminium alloy pre-stretching plates, operating procedure is 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, the most deaerated, filter after carry out successively casting, evenly heating processes, preheating, i.e. casts thickness
The slab ingot of degree 550mm；Then slab ingot carries out at temperature is 515 DEG C evenly heating process, and heating rate is 60 DEG C/h, and arrival refers to
After fixed temperature be incubated 19h, be cooled to room temperature, by gained slab ingot excision end to end with peeling after, obtaining thickness is 525～535mm
Slab ingot, keeps temperature 465 DEG C preheating 13.5h；
(2) after step (1) being preheated, gained 6 line aluminium alloy slab ingot carries out hot rolling, is rolled to the slab of 70mm finished product thickness, 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, obtain 6 line aluminium alloy sheet materials, then cool down；
(3) gained 6 line aluminium alloy sheet material after cooling in step (2) is carried out solution hardening, i.e. uses differential temperature quickly to heat,
6 line aluminium alloy sheet materials are warming up to 200 DEG C, and heating rate is more than 90 DEG C/min；It is warming up to 340 DEG C again, heating rate from 200 DEG C
It is 65 DEG C/min, is incubated 20min at 340 DEG C；Finally being warming up to 525 DEG C 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 C1Rear insulation, heating rate is 70 DEG C/min, and temperature retention time is 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, and temperature retention time is 80min；Wherein T1It is 440
DEG C, t1For 15min), rapid quenching is to room temperature；
(4) stretching: by gained 6 line aluminium alloy plate stretch after step (3) solution hardening, amount of tension is 1.9%；
(5) Ageing Treatment: after step (4) being stretched, gained 6 line aluminium alloy sheet material keeps temperature to be 175 DEG C, insulation 15h's
Ageing Treatment, obtains 6 line aluminium alloy pre-stretching plates, is analyzed after finished product sawing, and performance is as shown in table 1.
Table 1 70mm heavy-gauge sheeting performance indications
| State | Rp0.2/MPa | Rm/MPa | A/% |
| 6061/T651-GB | 240 | 290 | 9 |
| 6 is /T651-3 | 301 | 332 | 17.5 |
As seen from Table 1, the embodiment of the present invention 1 technical scheme products obtained therefrom, its performance is far beyond GB；Soaking simultaneously,
The technique such as hot rolling, solid solution, its plate surface is without Pericarpium Citri tangerinae shape lines phenomenon, and internal grain is tiny, and crystal grain about 60 μm, such as Fig. 2.
Embodiment 2
A kind of preparation technology of 6 line aluminium alloy pre-stretching plates, operating procedure is 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, the most deaerated, filter after carry out successively casting, evenly heating processes, preheating, i.e. casts thickness
The slab ingot of 400mm；Then slab ingot carries out at temperature is 460 DEG C evenly heating process, and heating rate is 40 DEG C/h, arrives and specifies
After temperature be incubated 30h be cooled to room temperature, by gained slab ingot excision end to end with peeling after, obtain thickness be 380～390mm flat
Ingot, keeps temperature 420 DEG C preheating 25h；
(2) after step (1) being preheated, gained 6 line aluminium alloy slab ingot carries out hot rolling, is rolled to the slab of 160mm finished product thickness,
Hot rolling percentage pass reduction third from the bottom 18%, 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, obtain 6 line aluminium alloy sheet materials, then cool down；
(3) gained 6 line aluminium alloy sheet material after cooling in step (2) is carried out solution hardening, i.e. uses differential temperature quickly to heat,
6 line aluminium alloy sheet materials are warming up to 200 DEG C, and heating rate is more than 90 DEG C/min；It is warming up to 300 DEG C again, heating rate from 200 DEG C
It is 40 DEG C/min, is incubated 35min at 300 DEG C；Finally being warming up to 500 DEG C 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 C1Rear insulation, heating rate is 40 DEG C/min, and temperature retention time is 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, and temperature retention time is 150min；Wherein T1It is 420
DEG C, t1For 25min), rapid quenching is to room temperature；
(4) stretching: by gained 6 line aluminium alloy plate stretch after step (3) solution hardening, amount of tension is 0.8%；
(5) Ageing Treatment: after step (4) being stretched, gained 6 line aluminium alloy sheet material keeps temperature to be 165 DEG C, insulation 20h's
Ageing Treatment, obtains 6 line aluminium alloy pre-stretching plates.
Embodiment 3
A kind of preparation technology of 6 line aluminium alloy pre-stretching plates, operating procedure is 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 that Al can not with some
The impurity element avoided, the most deaerated, filter after carry out successively casting, evenly heating processes, preheating, i.e. casts thickness 700mm
Slab ingot；Then slab ingot carries out at temperature is 570 DEG C evenly heating process, and heating rate is 80 DEG C/h, arrives assigned temperature
Rear insulation 8h, is cooled to room temperature, by gained slab ingot excision end to end with peeling after, obtain the slab ingot that thickness is 680～690mm, protect
Hold temperature 510 DEG C preheating 2h；
(2) after step (1) being preheated, gained 6 line aluminium alloy slab ingot carries out hot rolling, is rolled to the slab of 30mm finished product thickness, 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；?
Rear a time pressure 38%, mill speed 0.8m/s, obtain 6 line aluminium alloy sheet materials, then cool down；
(3) gained 6 line aluminium alloy sheet material after cooling in step (2) is carried out solution hardening, i.e. uses differential temperature quickly to heat,
6 line aluminium alloy sheet materials are warming up to 200 DEG C, and heating rate is more than 90 DEG C/min；It is warming up to 380 DEG C again, heating rate from 200 DEG C
It is 120 DEG C/min, is incubated 5min at 380 DEG C；Finally being warming up to 550 DEG C from 380 DEG C, heating rate is 100 DEG C/min, 550
DEG C solid solution 20min (is warming up to T from 380 DEG C1Rear insulation, heating rate is 100 DEG C/min, and temperature retention time is t1；Again by 6 be aluminum close
Gold sheet material is from T1Temperature is incubated after being warming up to 550 DEG C, and heating rate is 100 DEG C/min, and temperature retention time is 20min；Wherein T1For
460 DEG C, t1For 5min), rapid quenching is to room temperature；
(4) stretching: by gained 6 line aluminium alloy plate stretch after step (3) solution hardening, amount of tension is 3.0%；
(5) Ageing Treatment: after step (4) being stretched, gained 6 line aluminium alloy sheet material keeps temperature to be 185 DEG C, insulation 10h's
Ageing Treatment, obtains 6 line aluminium alloy pre-stretching plates.
Comparative example 1
A kind of preparation technology of 6 line aluminium alloy pre-stretching plates, operating procedure is 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, the most deaerated, filter after carry out successively casting, evenly heating processes, preheating, i.e. casts thickness
The slab ingot of degree 550mm；Then slab ingot carries out at temperature is 515 DEG C evenly heating process, and heating rate is 60 DEG C/h, and arrival refers to
After fixed temperature be incubated 19h, be cooled to room temperature, by gained slab ingot excision end to end with peeling after, obtaining thickness is 525～535mm
Slab ingot, keeps temperature 465 DEG C preheating 13.5h；
(2) after step (1) being preheated, gained 6 line aluminium alloy slab ingot carries out hot rolling, is rolled to the slab of 70mm finished product thickness, heat
Roll percentage pass reduction 15～17% third from the bottom, mill speed 3～4m/s；Percentage pass reduction 17～20% second from the bottom, rolling
Speed 2～3.5m/s；Last percentage pass reduction 19～22%, mill speed 1.5～2.5m/s, obtain 6 line aluminium alloy sheet materials,
Then cool down；
(3) gained 6 line aluminium alloy sheet material after cooling in step (2) is carried out solution hardening, i.e. uses differential temperature quickly to heat,
6 line aluminium alloy sheet materials are warming up to 200 DEG C, and heating rate is more than 90 DEG C/min；It is warming up to 340 DEG C again, heating rate from 200 DEG C
It is 65 DEG C/min, is incubated 20min at 340 DEG C；Finally being warming up to 525 DEG C 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 C1Rear insulation, heating rate is 70 DEG C/min, and temperature retention time is 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, and temperature retention time is 80min；Wherein T1It is 440
DEG C, t1For 15min), rapid quenching is to room temperature；
(4) stretching: by gained 6 line aluminium alloy plate stretch after step (3) solution hardening, amount of tension is 1.9%；
(5) Ageing Treatment: after step (4) being stretched, gained 6 line aluminium alloy sheet material keeps temperature to be 175 DEG C, insulation 15h's
Ageing Treatment, obtains product, is analyzed after finished product sawing, and performance is as shown in table 2.
Table 2 70mm heavy-gauge sheeting performance indications
| State | Rp0.2/MPa | Rm/MPa | A/% |
| 6061/T651-GB | 240 | 290 | 9 |
| 6 is /T651-1 | 289 | 321 | 18 |
As seen from Table 2, after composition being optimized by comparative example 1 and combining comparative example 1 process, gained
Its performance of product is far beyond GB；But do not process according to the hot rolling technology in the technology of the present invention, therefore, its sheet material table
There is heavier Pericarpium Citri tangerinae shape lines in face, and internal grain is relatively big, and grain size about 230 μm, its product is as shown in Figure 3.
Comparative example 2
A kind of preparation technology of 6 line aluminium alloy pre-stretching plates, operating procedure is 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, the most deaerated, filter after carry out successively casting, evenly heating processes, preheating, i.e. cast
The slab ingot of thickness 550mm；Then slab ingot carries out at temperature is 515 DEG C evenly heating process, and heating rate is 60 DEG C/h, arrives
After assigned temperature be incubated 19h, be cooled to room temperature, by gained slab ingot excision end to end with peeling after, obtaining thickness is 525～535mm
Slab ingot, keep temperature 465 DEG C preheating 13.5h；
(2) after step (1) being preheated, gained 6 line aluminium alloy slab ingot carries out hot rolling, is rolled to the slab of 70mm finished product thickness, heat
Roll percentage pass reduction 25～27% third from the bottom, mill speed 3～3.5m/s；Percentage pass reduction 25～27% second from the bottom, rolls
Speed 1.5～3m/s processed；Last percentage pass reduction 27～30%, mill speed 1.5～2.5m/s, obtain 6 line aluminium alloy plates
Material, then cools down；
(3) gained 6 line aluminium alloy sheet material after cooling in step (2) is carried out solution hardening, i.e. uses differential temperature quickly to heat,
6 line aluminium alloy sheet materials are warming up to 200 DEG C, and heating rate is more than 90 DEG C/min；It is warming up to 340 DEG C again, heating rate from 200 DEG C
It is 65 DEG C/min, is incubated 20min at 340 DEG C；Finally being warming up to 525 DEG C 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 C1Rear insulation, heating rate is 70 DEG C/min, and temperature retention time is 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, and temperature retention time is 80min；Wherein T1It is 440
DEG C, t1For 15min), rapid quenching is to room temperature；
(4) stretching: by gained 6 line aluminium alloy plate stretch after step (3) solution hardening, amount of tension is 1.9%；
(5) Ageing Treatment: after step (4) being stretched, gained 6 line aluminium alloy sheet material keeps temperature to be 175 DEG C, insulation 15h's
Ageing Treatment, obtains product, is analyzed after finished product sawing, and performance is as shown in table 3.
Table 3 70mm heavy-gauge sheeting performance indications
| State | Rp0.2/MPa | Rm/MPa | A/% |
| 6061/T651-GB | 240 | 290 | 9 |
| 6 is /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 is optimized, and performance can meet standard, but relatively low, and internal grain tissue is relatively big, grain size about 370 μm, table
Face also has more serious Pericarpium Citri tangerinae lines defect, and its product is as shown in Figure 4.
Comparative example 3
Producing 6 is alloy, 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%, composition melting 6061 aluminium alloy, deaerated, filter after, carry out semi-continuous casting, cast out the slab ingot that thickness is 520mm.
By slab ingot at 480 ± 10 DEG C of soaking, 60 DEG C/h of heating rate, it is incubated 15h.It is 500mm by thickness after slab cut end tail and peeling
Slab ingot.Slab ingot 450 DEG C is preheated 5h, is first rolled into slab, thickness 35mm, cooling.By sheet material at 530 DEG C of solid solution 50min, do
Single-stage solid solution, cools down after-drawing 2.0%, timeliness 172 DEG C insulation 12h.After finished product sawing, sheet material is analyzed, performance such as table 4
Shown in.
Table 4 35mm heavy-gauge sheeting performance indications
| State | Rp0.2/MPa | Rm/MPa | A/% |
| 6061/T651-GB | 240 | 290 | 9 |
| Conventional 6061/T651-1 | 262 | 307 | 13.5 |
As seen from Table 4, not being optimized composition, soaking, hot rolling etc., its performance is just met for GB；Its sheet material table
There is serious Pericarpium Citri tangerinae stricture of vagina in face, and internal grain is thick, and crystal grain about 500 μm, such as Fig. 5.
The aforementioned description to the specific illustrative embodiment of the present invention illustrates that and the purpose of illustration.These describe
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can much change
And change.The purpose selected exemplary embodiment and describe is to explain that the certain principles of the present invention and reality thereof should
With so that those skilled in the art be capable of and utilize the present invention various different exemplary and
Various different selections and change.The scope of the present invention is intended to be limited by claims and equivalents thereof.
Claims (10)
1. a line aluminium alloy, 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 elements.
2. the preparation technology of the pre-stretching plate of 6 line aluminium alloys as claimed in claim 1, it is characterised in that comprise following
Operating procedure:
(1) producing 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, cast the most successively
Make, evenly heating processes, preheating；
(2) gained 6 line aluminium alloy after preheating in step (1) is carried out hot rolling, be rolled to finished product thickness, then cool down；
(3) gained 6 line aluminium alloy after cooling in step (2) being carried out solution hardening, after solution hardening, gained 6 line aluminium alloy is carried out
Later stage processes, and to obtain final product.
The preparation technology of 6 line aluminium alloy pre-stretching plates the most according to claim 2, it is characterised in that: described in step (1)
Be cast into the slab ingot casting thickness 400～700mm.
The preparation technology of 6 line aluminium alloy pre-stretching plates the most according to claim 2, it is characterised in that: described in step (1)
Homogenization heat treatment temperature is 460 DEG C～570 DEG C, and heating rate is 40～80 DEG C/h, is incubated 8～30h.
The preparation technology of 6 line aluminium alloy pre-stretching plates the most according to claim 2, it is characterised in that: described in step (1)
Preheating be 420 DEG C～510 DEG C preheating 2～25h.
The preparation technology of 6 line aluminium alloy pre-stretching plates the most according to claim 2, it is characterised in that: hot rolling in step (2)
Percentage pass reduction 18～35% third from the bottom, mill speed 2～7m/s；Percentage pass reduction 20～36% second from the bottom, rolling speed
Degree 1～6m/s；Last percentage pass reduction 24～38%, mill speed 0.8～5m/s.
The preparation technology of 6 line aluminium alloy pre-stretching plates the most according to claim 2, it is characterised in that: described in step (3)
Solution hardening be material heating rate be 40～120 DEG C/min, be warming up to 300～380 DEG C, reach to be incubated after assigned temperature 5
～35min, then keeping material heating rate is 40～100 DEG C/min, is warming up to 500～550 DEG C, protects after reaching assigned temperature
Temperature 20～150min.
The preparation technology of 6 line aluminium alloy pre-stretching plates the most according to claim 2, it is characterised in that step (3) solid solution is quenched
The more detailed step of fire is:
1. gained after cooling 6 line aluminium alloy being warming up to 200 DEG C, heating rate is more than 90 DEG C/min；
Being warming up to 300～380 DEG C from 200 DEG C the most again, heating rate is 40～120 DEG C/min, 300～380 DEG C insulation 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.
The preparation technology of 6 line aluminium alloy pre-stretching plates the most according to claim 8, it is characterised in that step is 3. by two
The individual stage realizes:
Stage 1: 6 line aluminium alloy sheet materials are warming up to T from 300～380 DEG C1Rear insulation, heating rate is 40～100 DEG C/min, protects
The temperature 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,
Temperature retention time is 20～150min；Wherein T1It is 420～460 DEG C, t1It is 5～25min.
The preparation technology of 9 line aluminium alloy pre-stretching plates the most according to claim 1, it is characterised in that: institute in step (3)
The later stage stated is processed as: step (4) stretching and step (5) Ageing Treatment；Wherein, described step (4) stretches, and amount of tension is 0.8
～3.0%；Described step (5) Ageing Treatment, treatment temperature is 165～185 DEG C, is incubated 10～20h.
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| CN109576617A (en) * | 2018-12-20 | 2019-04-05 | 广西南南铝加工有限公司 | A kind of preparation method of 6 line aluminium alloy hot investment casting Quenching Sheet |
| CN111778431A (en) * | 2020-07-02 | 2020-10-16 | 苏州阿罗米科技有限公司 | High-toughness single-walled carbon nanotube aluminum alloy-based composite material and preparation method thereof |
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| CN112593100A (en) * | 2020-11-24 | 2021-04-02 | 广西南南铝加工有限公司 | Preparation method of large-size 6061 aluminum alloy plate for semiconductor equipment |
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