CN109821915A - A kind of ultra-thin aluminum alloy profile extrusion technique - Google Patents
A kind of ultra-thin aluminum alloy profile extrusion technique Download PDFInfo
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- CN109821915A CN109821915A CN201910211781.1A CN201910211781A CN109821915A CN 109821915 A CN109821915 A CN 109821915A CN 201910211781 A CN201910211781 A CN 201910211781A CN 109821915 A CN109821915 A CN 109821915A
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Abstract
The present invention relates to aluminium alloy extrusions manufacturing fields, and in particular to a kind of ultra-thin aluminum alloy profile extrusion technique comprising following steps: one, ingot casting being carried out Homogenization Treatments, Homogenization Treatments temperature is 550-600 DEG C, and soaking time is 4-8 hours；Two, the ingot casting after step 1 is heated to 450-500 DEG C, merging equal channel angular extrusion die carries out Equal-channel Angular Pressing, and extrusion passes are 4-6 times；Three, the ingot casting after step 2 is heated to 550-600 DEG C, is placed in extruder and is squeezed, obtain aluminium alloy extrusions, the mould heating-up temperature in extruder is 500-530 DEG C, and the extrusion speed in extrusion process is 3-6m/min；Four, aluminium alloy extrusions after extruding carries out online water spray quenching processing in extrusion die exit, and aluminium alloy extrusions, which goes out quenching area temperature, should be less than or be equal to 60 DEG C；Five, the aluminium alloy extrusions after quenching treatment is subjected to tension straingtening；Six, the aluminium alloy extrusions after step 5 is subjected to artificial aging.The present invention is applied to the extrusion forming of ultra-thin aluminum alloy profile production.
Description
Technical field
The present invention relates to aluminium alloy extrusions manufacturing fields, and in particular to a kind of ultra-thin aluminum alloy profile extrusion technique.
Background technique
In recent years, with advances in technology with modernization rapid development of economy, aluminium alloy extrusions is just towards enlarged, whole
The flat widthization of body, thin-walled, size high precision int, complex-shapedization direction develop.Big section thin-walled aluminum profile is for product ruler
Very little required precision is higher, is easy to produce the defects of surface wave, wall thickness are thinning, mechanical property is not up to standard.It must be used when extruding
The mold of some special technological measures and special construction can just produce qualified product.
Chinese patent CN105925921A if the applying date is on July 12nd, 2016 discloses a kind of ultra-thin allotype aluminum alloy
Extrudate production technology and product, in quenching specifically: to the aluminium alloy extrusions squeezed out in the extrusion cylinder
Outlet first carries out the online water mist processing setting in part, then carries out whole online water mist processing and when aluminium alloy extrusions goes out quenching area
Temperature is 18~35 DEG C, provides a kind of first selective hardening, then the preparation process of integral quenching, to reduce overall deformation and rise
Wave, but the technical solution profile, after selective hardening, this will appear different physical characteristics when being in integral quenching, be formed local
Differentiation influences the consistency of product.
Summary of the invention
Therefore, the present invention provides a kind of ultra-thin aluminum alloy profile extrusion technique, solves aluminium alloy extrusions homogeneity of product
Poor problem.
In order to achieve the above objectives, the present invention is achieved by the following technical solutions:
A kind of ultra-thin aluminum alloy profile extrusion technique comprising following steps:
One, ingot casting is subjected to Homogenization Treatments, Homogenization Treatments temperature is 550-600 DEG C, and soaking time is that 4-8 is small
When；
Two, the ingot casting after step 1 is heated to 450-500 DEG C, merging equal channel angular extrusion die carries out that channels is waited to turn
Angle squeezes, and extrusion passes are 4-6 times；
Three, the ingot casting after step 2 is heated to 550-600 DEG C, is placed in extruder and is squeezed, obtain aluminium alloy type
Material, the mould heating-up temperature in extruder are 500-530 DEG C, and the extrusion speed in extrusion process is 3-6m/min；
Four, step 3 aluminium alloy extrusions after extruding is subjected to online water spray quenching processing, aluminium in extrusion die exit
Alloy profile, which goes out quenching area temperature, should be less than or be equal to 60 DEG C；
Five, the aluminium alloy extrusions after being quenched step 4 carries out tension straingtening；
Six, the aluminium alloy extrusions after step 5 is subjected to artificial aging, aging temp is 180-200 DEG C, and when timeliness is a length of
1-3 hours.
Preferably, equal channel angular extrusion die described in step 2 includes ontology, and it is logical that extruding is offered in the ontology
Road, the squeezing passage section is cylindrical, and the squeezing passage input end is provided with the pressure roller for inputting ingot casting,
Uniformly equipped with a plurality of for transmitting the pinch roller of ingot casting in the ontology of the squeezing passage two sides, the squeezing passage is in
Fold-line-shaped, the arc-shaped concave inward structure of the periphery of the pinch roller.
Preferably, the position of broken line of the squeezing passage is to squeeze corner, and the extruding corner is 120 degree, extrusion speed
For 1mm/s.
Preferably, in above-mentioned steps one ingot homogenization temperature be 580 degrees Celsius, homogenization time 5 hours, in step 2
Equal-channel Angular Pressing ingot casting temperature is 480 degrees Celsius.
Preferably, aluminium alloy stock is prepared according to following weight fraction ratio and produce ingot casting: Si 1.35-1.45%, Fe
0.21%, Cu 0.05%, Mn 0.44~0.48%, Mg 0.50~0.55%, Cr 0.09%, Zn 0.05%, Ti
0.02%, remaining impurity total≤0.15%, prepared aluminium alloy stock is added in smelting furnace and uniformly mixes by surplus Al
Melting is liquid aluminium alloy afterwards, is ingot casting by liquid aluminium alloy founding.
By using preceding solution, the beneficial effects of the present invention are: the present invention is first equal for aluminium alloy cast ingot progress
Processing is homogenized, carries out multiple Equal-channel Angular Pressing processing afterwards, the degree of irregularity that after processing material can deform obtains obviously
Improve, material grains size is refined during multiple shearing, and size is more uniformly spread, so that aluminum alloy materials exist
Intensity and hardness tool after processing increase significantly, and particular for the ultra-thin alloy product of production wall thickness, have relatively strong
Product capability, while also avoiding the poor problem of homogeneity of product caused by selective hardening.
Detailed description of the invention
Fig. 1 is the equal channel angular extrusion die schematic cross-sectional view of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of pinch roller of the embodiment of the present invention.
Specific embodiment
Carry out the embodiment that the present invention will be described in detail below with reference to specific embodiment, how skill is applied to the present invention whereby
Art means solve technical problem, and the realization process for reaching technical effect can fully understand and implement.
Embodiment
Referring to Figure 1 and Figure 2, a kind of ultra-thin aluminum alloy profile extrusion technique comprising following steps:
One, ingot casting is subjected to Homogenization Treatments, Homogenization Treatments temperature is 550-600 DEG C, and soaking time is that 4-8 is small
When, the present embodiment is specially that homogenization temperature is 580 degrees Celsius, homogenization time 5 hours；
Two, the ingot casting after step 1 is heated to 450-500 DEG C, merging equal channel angular extrusion die carries out that channels is waited to turn
Angle squeezes, and extrusion passes are 4 times, and ingot casting temperature is 480 degrees Celsius when the present embodiment Equal-channel Angular Pressing；
Three, the ingot casting after step 2 is heated to 570 DEG C, is placed in extruder and is squeezed, obtain aluminium alloy extrusions, squeezed
Mould heating-up temperature in press is 530 DEG C, and the extrusion speed in extrusion process is 3m/min；
Four, step 3 aluminium alloy extrusions after extruding is subjected to online water spray quenching processing, aluminium in extrusion die exit
It is 60 DEG C that alloy profile, which goes out quenching area temperature,；
Five, the aluminium alloy extrusions after being quenched step 4 carries out tension straingtening；
Six, the aluminium alloy extrusions after step 5 is subjected to artificial aging, aging temp is 180 DEG C, and a length of 3 is small when timeliness
When.
In the present embodiment, equal channel angular extrusion die described in step 2 includes ontology 1, is offered in the ontology 1
Squeezing passage 2,2 section of squeezing passage is cylindrical, is provided with positioned at 2 input end of squeezing passage for inputting casting
The pressure roller 3 of ingot squeezes uniformly equipped with 8 for transmitting the pinch roller 4 of ingot casting in the ontology 1 of 2 two sides of squeezing passage
The pinch roller of 2 two sides of channel is symmetrical, and the squeezing passage 2 is in fold-line-shaped, the arc-shaped indent of the periphery of the pinch roller 4
Structure.Equal channel angular treated ingot casting cylindrical structure under the action of pinch roller 4, can make the distribution of material grains more
To be uniform, crystallite dimension is more consistent.
Specifically, the position of broken line of the squeezing passage 2 is to squeeze corner, the extruding corner is 120 degree, extrusion speed
For 1mm/s.The present embodiment carries out Equal-channel Angular Pressing repeatedly to ingot casting and handles, and the mechanical property for enabling aluminum alloy to material obtains
It significantly improves, tensile strength, yield strength increase, while keeping certain elongation percentage, especially suitable for increasing ultra-thin aluminum alloy
The production of profile.
Specifically, the present embodiment, which prepares aluminium alloy stock according to following weight fraction ratio in production, produces ingot casting: Si
1.35-1.45%, Fe 0.21%, Cu 0.05%, Mn 0.44~0.48%, Mg 0.50~0.55%, Cr 0.09%, Zn
0.05%, Ti 0.02%, remaining impurity add up to≤0.15%, surplus Al, prepared aluminium alloy stock are added to smelting furnace
In after evenly mixing melting be liquid aluminium alloy, by liquid aluminium alloy founding be ingot casting.Each raw material value is in this section.
The present invention carries out first Homogenization Treatments for aluminium alloy cast ingot, carries out multiple Equal-channel Angular Pressing processing afterwards, locates
The degree of irregularity that after reason material can deform be improved significantly, material grains size obtains thin during multiple shearing
To change, size more uniformly spreads, so that aluminum alloy materials intensity after processing and hardness tool increase significantly, special needle
The alloy product ultra-thin to production wall thickness, has stronger product capability, while also avoiding product one caused by selective hardening
The poor problem of cause property.
Although specifically showing and describing the present invention in conjunction with preferred embodiment, those skilled in the art should be bright
It is white, it is not departing from the spirit and scope of the present invention defined by the appended claims, it in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (5)
1. a kind of ultra-thin aluminum alloy profile extrusion technique, which comprises the following steps:
One, ingot casting is subjected to Homogenization Treatments, Homogenization Treatments temperature is 550-600 DEG C, and soaking time is 4-8 hours；
Two, the ingot casting after step 1 is heated to 450-500 DEG C, merging equal channel angular extrusion die carries out equal channel angular and squeezes
Pressure, extrusion passes are 4-6 times；
Three, the ingot casting after step 2 is heated to 550-600 DEG C, is placed in extruder and is squeezed, obtain aluminium alloy extrusions, squeezed
Mould heating-up temperature in press is 500-530 DEG C, and the extrusion speed in extrusion process is 3-6m/min；
Four, step 3 aluminium alloy extrusions after extruding is subjected to online water spray quenching processing, aluminium alloy in extrusion die exit
Profile, which goes out quenching area temperature, should be less than or be equal to 60 DEG C；
Five, the aluminium alloy extrusions after being quenched step 4 carries out tension straingtening；
Six, the aluminium alloy extrusions after step 5 is subjected to artificial aging, aging temp is 180-200 DEG C, and a length of 1-3 is small when timeliness
When.
2. ultra-thin aluminum alloy profile extrusion technique according to claim 1, it is characterised in that: equal channels described in step 2
Angular extrusion die includes ontology, and squeezing passage is offered in the ontology, and the squeezing passage section is cylindrical, is located at institute
It states squeezing passage input end and is provided with pressure roller for inputting ingot casting, it is uniformly embedding in the ontology of the squeezing passage two sides
A plurality of pinch rollers for being used to transmit ingot casting are equipped with, the squeezing passage is in fold-line-shaped, and the periphery of the pinch roller is arc-shaped
Concave inward structure.
3. ultra-thin aluminum alloy profile extrusion technique according to claim 2, it is characterised in that: the broken line of the squeezing passage
Position is to squeeze corner, and the extruding corner is 120 degree, extrusion speed 1mm/s.
4. ultra-thin aluminum alloy profile extrusion technique according to claim 3, it is characterised in that: ingot casting is equal in above-mentioned steps one
Homogenizing temperature is 580 degrees Celsius, and homogenization time 5 hours, Equal-channel Angular Pressing ingot casting temperature was 480 Celsius in step 2
Degree.
5. ultra-thin aluminum alloy profile extrusion technique described in any one of -4 claims according to claim 1, it is characterised in that:
According to following weight fraction ratio prepare aluminium alloy stock produce ingot casting: Si 1.35-1.45%, Fe 0.21%, Cu 0.05%,
Mn 0.44~0.48%, Mg 0.50~0.55%, Cr 0.09%, Zn 0.05%, Ti 0.02%, remaining single impurity≤
0.05%, impurity total≤0.15%, prepared aluminium alloy stock is added in smelting furnace and melts after evenly mixing by surplus Al
Refining is liquid aluminium alloy, is ingot casting by liquid aluminium alloy founding.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110153218A (en) * | 2019-06-19 | 2019-08-23 | 燕山大学 | Channel pressings mold and its pressing methods such as a kind of roller |
| CN110170540A (en) * | 2019-06-05 | 2019-08-27 | 临沂高新区双航材料科技有限公司 | A kind of magnesium lithium-base alloy plate extrusion process |
| CN110408868A (en) * | 2019-09-02 | 2019-11-05 | 江苏江南创佳型材有限公司 | A kind of preparation method for exempting from the high tough aluminium alloy of timeliness based on large deformation homogenization |
| CN110592502A (en) * | 2019-09-02 | 2019-12-20 | 江苏江南创佳型材有限公司 | Preparation method of high-strength wrought aluminum alloy based on severe plastic deformation |
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