CN110004337A - A kind of high-strength aluminum alloy seamless tubular goods - Google Patents
A kind of high-strength aluminum alloy seamless tubular goods Download PDFInfo
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- CN110004337A CN110004337A CN201810012344.2A CN201810012344A CN110004337A CN 110004337 A CN110004337 A CN 110004337A CN 201810012344 A CN201810012344 A CN 201810012344A CN 110004337 A CN110004337 A CN 110004337A
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- aluminium alloy
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- aluminum alloy
- tubular goods
- strength aluminum
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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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
-
- 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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Metal Extraction Processes (AREA)
- Forging (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a kind of high-strength aluminum alloy seamless tubular goods, it is characterised in that: in terms of quality %, the aluminium alloy contains Si:0.7~0.9%, and Cu:1.2~1.8%, Mg:0.8~1.2%, remaining is Al and inevitable impurity.Aluminium alloy of the invention can simultaneously with it is high-intensitive, be easy to be easy aligning integer after plastic processing, solid solution water quenching with up to precise measure, corrosion-resistant and the advantages that avoid scratch, so as to greatly improve practicability of the invention.
Description
Technical field
The present invention relates to a kind of aluminum alloy materials, in particular to a kind of aluminum alloy materials for aluminium alloy seamless pipe.
Background technique
Aluminium alloy seamless pipe has important and is widely applied in the vehicle frame or spare part of bicycle or locomotive, to keep away
Shake type bicycle frame pipe such as shock-absorbing front fork pipe fitting (suspension fork, i.e., with front crown (fork crown) close-fitting it
Pipe fitting) for, hard sun processing is carried out using high intensity aluminium alloy pipe and surface, use loss of weight and promoted antiwear characteristic with meet by
Power and the topology requirement of sliding, it has also become the mainstream and trend of industry.Refering to Figure 1, which show a kind of existing available
In the typical processes for making front fork pipe fitting as described above: an aluminium alloy seamless pipe being squeezed type (squeezing pipe) first, a nothing is made
Extrusion type pipe is stitched, becomes relatively thin and more accurate pipe fitting through the system of taking out (take out and manage) again after annealing, solid solution water next is bestowed to pipe fitting again
It quenches and aging strengthening model, finally again by NC processing (numerical control processing), grinding (outer diameter) and programs such as (internal diameters) of boring and grinding to pipe fitting
It is processed to reach the requirement of precise measure, and carries out necessary hard sun processing to promote the wear-resisting property of pipe fitting, thus complete
At the manufacturing process of front fork pipe fitting.In general, front fork tube, which need to usually meet surface, should reach the low surface roughness of sliding part (such as
Ra value should be in the range of 0.05~0.25 μm) and high-accuracy size (such as outer diameter (O.D) error within ± 0.03mm, internal diameter
(I.D) error is within ± 0.05mm) etc. requirement in structures.
In the prior art, the 7xxx line aluminium alloy (such as 7075 or 7050 aluminium alloy) with high-strength characteristic is bicycle
One of the mainstay material of vehicle frame tubing or shock-absorbing front fork pipe fitting, however, being used when actually considering above-mentioned front fork tube processing procedure
The problem of 7xxx line aluminium alloy, emerges one by one: firstly, processability of the 7xxx line aluminium alloy in seamless pipes processing procedures such as the type of squeezing, pumping pipes
Obviously it is inferior to the aluminium alloy (such as 6xxx line aluminium alloy) of other series, i.e., there are be not easy the problem of carrying out plastic processing；Secondly,
7xxx line aluminium alloy its intensity of a period of time after being dissolved water quenching can be substantially improved, and will so be less susceptible to be made to after solid solution water quenching
At size distortion problem carry out aligning integer operation；In addition, 7xxx line aluminium alloy is processed in NC, the stages such as grinds and bore and grind and hold
It is also easy to produce etching problem, makes hard sun treated that product yield is restricted, such visible 7xxx line aluminium alloy is not actually
It is the ideal material of shock-absorbing front fork pipe fitting.
In terms of the 6xxx line aluminium alloy for being easy plastic processing, Alcoa development of company goes out 6013 famous aluminium alloys, warp
After T6 processing, it is high-strength that yield strength (Yield Strength) is similar or close to 2024-T3 aluminium alloy up to 317MPa
Development critically important in forge aluminium alloy is spent, however, this aluminium alloy in intensity still cannot be with general 7xxx line aluminium alloy
It compares.
United States Patent (USP) US5571347 discloses a kind of 6xxx line aluminium alloy of high intensity, typical to represent such as 6069 aluminium
Alloy, more than test shows its yield strength up to 52ksi (358MPa), this right patent document is only with stick, the type after extruding
The conditions such as material and heat treatment are tested, and under the above conditions, the elements such as added V, Be and Sr hold in such 6069 aluminium alloy
It easily maintains the tissue of non-recrystallization and has the effect of reinforcing, the precise measure of front fork tube requires and often have the pipe of not uniform thickness if considering
Material size (such as the one end matched is covered tightly with shoulder thicker) is needed with the system of taking out come the case where making product, at this point, due to taking out system processing
It is easy to generate recrystallization after heat treatment and weaken intensity, therefore, although such aluminium alloy is squeezing pipe and T6, treated subdues
Some parameters of intensity can reach 55ksi (379MPa), and need the vehicle frame industry welded to have important application, but still less be answered
For front fork tube.
In addition, industry also has 6066 seamless pipes for releasing a kind of high silicon content, it is the content of increase Si to promote alloy
The Si content of intensity, usual such aluminium alloy is greater than 1.2wt%, if 6066 aluminium alloys of such high silicon content are applied to front fork tube
Processing procedure will be substantially better than high-intensitive 7xxx line aluminium alloy in the processability of the type of squeezing, pumping pipe, in solid solution and timeliness heat treatment stages
Aligning integer is also easier to so that up to precise measure, hard sun handles also more corrosion-free problem, however, such aluminium alloy is easy to produce richness
Jie's metallic particles (intermetallic compound) of the ingredient containing Si, in this way, the equal gold that is situated between in operations such as crowded pipes
Metal particles easily adhere on mold and cause scratch to pipe fitting, so as to cause in subsequent NC processing etc. in operations, especially
It is that the inside diameter surface of tubing will be not easy to bore and grind to low surface roughness required by sliding part is met, this technical problem also limits
Application of 6066 aluminium alloys of such high silicon content on front fork tube.
Therefore, how to develop a kind of demand of each stage process that can take into account shock-absorbing front fork tube and avoid the above problem
High-strength aluminum alloy seamless tubular goods becomes the technical task of a high practicability and urgency.
Summary of the invention
It existing above-mentioned is asked as shock-absorbing bicycle frame pipe using upper in view of aluminum alloy materials in the prior art
Topic, therefore the purpose of the present invention is to develop one kind can have both that be easy aligning after high-intensitive, easy plastic processing, solid solution water quenching whole
Type is to reach precise measure, aluminum alloy seamless tube that is corrosion-resistant and reducing the characteristics such as scratch.
To reach above-mentioned purpose, the present invention provides a kind of high-strength aluminum alloy seamless tubular goods, it is characterised in that: with quality %
It counts, Si:0.7~0.9% is contained in the aluminium alloy, Cu:1.2~1.8%, Mg:0.8~1.2%, remaining is Al and can not keep away
The impurity exempted from.
Preferably, the content of Si is 0.8~0.85% in the aluminium alloy.
Preferably, the content of Cu is 1.54~1.64% in the aluminium alloy.
Preferably, the content of Mg is 0.9~1.0% in the aluminium alloy.
Preferably, in terms of quality %, one or more of the element of following contents is further contained in the aluminium alloy:
Fe:0.2% hereinafter, Mn:0.6% hereinafter, Cr:0.2% hereinafter, Ti:0.2% hereinafter, Zn:0.25% hereinafter, Zr:0.2% with
Under.
Preferably, the content of each impurity in the aluminium alloy is respectively less than 0.05%, and the total content of all impurity
Less than 0.15%.
Whereby, aluminium alloy of the invention can be simultaneously with easy aligning after high-intensitive, easy plastic processing, solid solution water quenching
Integer is with up to precise measure, corrosion-resistant and the advantages that avoid scratch, so as to greatly improve practicability of the invention.
Detailed description of the invention
Fig. 1 is the recipe step flow chart of shock-absorbing front fork pipe fitting in the prior art.
Fig. 2 is the enlarged drawing that 6066 aluminium alloy seamless pipe in the prior art is easy to appear scratch after extruding.
Fig. 3 is the metallographic microscope that Fig. 2 measures scratch depth on cross section.
Fig. 4 is the metallographic microscope of the tissue of its cross section of 6066 aluminium alloy seamless pipe in the prior art.
Fig. 5 is the metallographic microscope of the tissue of its cross section of aluminium alloy seamless pipe of the invention.
Specific implementation method
The invention will now be further described with reference to specific embodiments, the advantages and features of the present invention will be with description and
It is apparent.But examples are merely exemplary for these, and it is not intended to limit the scope of the present invention in any way.Those skilled in the art
Member it should be understood that without departing from the spirit and scope of the invention can details to technical solution of the present invention and form into
Row modifications or substitutions, but these modifications and replacement are fallen within the protection scope of the present invention.
In an embodiment of high-strength aluminum alloy seamless tubular goods of the present invention, the aluminium as high intensity seamless tubing is closed
The chemical component of gold contains: in terms of quality %, Si:0.7~0.9%, Cu:1.2~1.8%, Mg:0.8~1.2% etc. are mainly closed
Gold element, remaining is Al and inevitable impurity.
Preferably, in one embodiment of the invention, the content of Si is 0.8~0.85%.
Preferably, in one embodiment of the invention, the content of Cu is 1.54~1.64%.
Preferably, in one embodiment of the invention, the content of Mg is 0.9~1.0%.
It preferably, in one embodiment of the invention, can be further as the aluminium alloy of high intensity seamless tubing
In secondary alloying element containing following content one or more of: in terms of quality %, Fe:0.2% hereinafter, Mn:0.6% with
Under, Cr:0.2% hereinafter, Ti:0.2% hereinafter, Zn:0.25% hereinafter, Zr:0.2% or less；Also that is, above-mentioned secondary alloy member
Element can not also actually add, if but added in above-mentioned ratio range, can make product have promoted again intensity and
The advantages that facilitating recycling founding, therefore the upper range of permission is designed herein.
Preferably, in one embodiment of the invention, as each in the aluminium alloy of high intensity seamless tubing
The content of kind impurity is respectively less than 0.05%, and the total content of all impurity is less than 0.15%；In the present invention, the impurity refers to
Other elements ingredient other than Al, the main alloy element and the secondary alloying element.
The present invention selects a variety of specific proportion combinations made in the ratio range of above-mentioned provided each constituent
Examination body of the standby obtained aluminium alloy as embodiment, and it is numbered, to verify the technical effect of aluminium alloy of the invention,
Wherein respectively the specific ingredient (quality %) of examination body forms as shown in following table one:
Table one
Body aluminium alloy will be respectively tried in upper table one, by typical front fork pipe fitting processing procedure above-mentioned, is fabricated to front fork pipe fitting respectively, and
Corresponding pipe fitting number is equally assigned (to try the made front fork pipe fitting of body by No. 1 and be known as No. 1 pipe fitting, with such
Push away), then to these front fork pipe fittings carry out tensile strength (Tensile Strength), yield strength (Yield Strength) with
The measurement of elongation (Elongation), obtained data and with other representative aluminium alloys in the prior art
The comparison result such as following table two of (7075-T73 aluminium alloy, 2014-T6 aluminium alloy, 2024-T3 aluminium alloy and 6066-T6 aluminium alloy)
It is shown:
Table two
In table two, each pipe fitting of the invention is to be extruded into tubing by 7 inches of ingot castings with 420 DEG C, then take out system 30%
Left and right is at more accurate size (in the present embodiment, outer diameter (O.D) is 35.62mm, and internal diameter (I.D) is 29.95mm), to meet
The requirement of front fork tube, wherein No. 1 is to take out system 12% again after being dissolved with 535 DEG C, and bestow T8 processing (180 DEG C of x8 with No. 2 pipe fittings
Hour), No. 3 pipe fittings are averagely to be acquired with bestowing T6 processing (180 DEG C x8 hours) again after 560 DEG C of solid solutions by representative test specimen
Typical tensile property can prove compared with the characteristic of representative aluminium alloys in the prior art other in table two
The present invention may conform to the property of 7xxx line aluminium alloy T73 in the yield strength of stretching.
If typical by taking 7075 aluminium alloys as an example from the processabilities of processing procedures such as extruding or whether from the point of view of easy plastic processing
Ingredient is 5.6Zn-2.5Mn-1.6Cu-0.23Cr, and alloy content is up to 9.93 (wt%), opposite, of the invention typical composition
0.8Si-1.0Mg-1.5Cu, alloy content only about 3.3 (wt%), or even also less than high silicon content 6066 aluminium alloys conjunction
Gold content, considers the extruding property by squeezing speed, yield and the temperature range that can be worked are determined, aluminium alloy of the invention close to
6xxx line aluminium alloy is but better than the plastic processing property of 7075 aluminium alloys with 2~4 times.
The problem of difficulty or ease and property about processing of boring and grinding, by taking a kind of common 6066 aluminium alloy of industry as an example, ingredient
(wt%) are as follows: Si:1.35, Fe:0.16, Cu:1.09, Mn:1.03, Mg:1.10, Cr:0.16, Ti:0.01, remaining is Al and miscellaneous
Matter is extruded as the tubing of outer diameter 32mm, internal diameter 25.2mm, then is heat-treated and exists for outer diameter 25.6mm, internal diameter 19.97mm and error
Precise measure within ± 0.01mm, at this point, 6066 aluminium alloy is in crowded Guan Houqi inside diameter surface, it is easy to appear as shown in Figure 2
Scratch, meanwhile, if checking its transversal cross-section, easily discovery is as shown in Figure 3, depth up to 25 μm (i.e. 0.025mm) scratch,
For process of boring and grinding, the grinding depth greater than 0.02mm is the bottleneck being not easily overcome and is unable to satisfy internal diameter error and exists
Requirement within ± 0.01mm show the metallographic microscope of its cross section tissue of such 6066 aluminium alloy referring again to Fig. 4, thus schemes
It can find easily to be distributed some greyish black Jie's metal compound particles rich in Fe-Si in 6066 aluminium alloys of such high silicon content
(the black pointing object i.e. in figure), thus it is speculated that this is because the alloy based on Si is unable to fully caused by the factors such as solid solution, cause this etc.
Jie's metallic particles rich in Fe-Si is easily adhered mold when squeezing pipe and scratches pipe fitting；Finally referring again to shown in Fig. 5, Fig. 5 is
The metallographic microscope of No. 1 its cross section tissue of pipe fitting of the invention, can be seen that by the figure, and in aluminium alloy of the invention, be situated between metallization
Polymer beads are only micro distribution, the image analysing computer of the greyish black particle of further progress, it is possible to find greyish black Jie of 6066 aluminium alloys
The average particle size particle size of metallic compound is up to 5.96 μm, and occupying point rate is 4.97%, and greyish black Jie in aluminium alloy of the invention
An average example size for metallic compound only has 3.84 μm, and occupying point rate is 2.07%, compares the alloy content of the two, Fe's contains
Amount is 0.16% and 0.13% respectively, and the content of Si is 1.35% and 0.84% respectively, the content of Mn be respectively 1.03% and
0.09%, analysis should be that high Si, Mn content of 6066 aluminium alloys causes a large amount of Jie's metal compound particles to be distributed, and review, this hair
The Mg-Si-Cu aluminium alloy of bright relatively high Cu content suitably can be dissolved and homogenize, so as to efficiently reduce the metallization that is situated between
Polymer beads simultaneously avoid generating scratch when squeezing pipe.
In summary illustrate, it is seen that in being closed using upper, of the invention aluminium for shock-absorbing bicycle frame pipe such as seat pipe or front fork tube
Gold not only in intensity close to high intensity 7xxx line aluminium alloy, while again can with the easy plastic processing of 6xxx line aluminium alloy,
Be dissolved after water quenching be easy aligning integer with up to precise measure and it is corrosion-resistant the advantages that, it is often more important that, while also can avoid high silicon
The problem of 6066 aluminium alloys of content are easy to produce scratch, and due to the need of high intensity 7xxx front fork tube originally close in intensity
It asks, facilitates engineer and used under conditions of original 7xxx front fork pipe size with slightly thickening or not changing, and can be easy to pass through production
It is more competitive in product performance test and processing procedure, and then the practical value and progressive of the provable present invention.
Claims (6)
1. a kind of high-strength aluminum alloy seamless tubular goods, it is characterised in that: in terms of quality %, the aluminium alloy contain Si:0.7~
0.9%, Cu:1.2~1.8%, Mg:0.8~1.2%, surplus are Al and inevitable impurity.
2. high-strength aluminum alloy seamless tubular goods as described in claim 1, it is characterised in that: the content of Si is in the aluminium alloy
0.8~0.85%.
3. high-strength aluminum alloy seamless tubular goods as described in claim 1, it is characterised in that: the content of Cu is in the aluminium alloy
1.54~1.64%.
4. high-strength aluminum alloy seamless tubular goods as described in claim 1, it is characterised in that: the content of Mg is in the aluminium alloy
0.9~1.0%.
5. high-strength aluminum alloy seamless tubular goods as described in claim 1, it is characterised in that: in terms of quality %, the aluminium alloy
In further contain following contents one or more of element: Fe:0.2% hereinafter, Mn:0.6% hereinafter, Cr:0.2% with
Under, Ti:0.2% hereinafter, Zn:0.25% hereinafter, Zr:0.2% or less.
6. high-strength aluminum alloy seamless tubular goods as described in claim 1, it is characterised in that: each in the aluminium alloy is miscellaneous
The content of matter is respectively less than 0.05%, and the total content of all impurity is less than 0.15%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810012344.2A CN110004337A (en) | 2018-01-05 | 2018-01-05 | A kind of high-strength aluminum alloy seamless tubular goods |
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| CN201810012344.2A CN110004337A (en) | 2018-01-05 | 2018-01-05 | A kind of high-strength aluminum alloy seamless tubular goods |
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| CN110004337A true CN110004337A (en) | 2019-07-12 |
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| CN201810012344.2A Pending CN110004337A (en) | 2018-01-05 | 2018-01-05 | A kind of high-strength aluminum alloy seamless tubular goods |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112877623A (en) * | 2019-11-29 | 2021-06-01 | 中国科学院金属研究所 | Aluminum alloy and aluminum matrix composite for preparing aluminum matrix composite with low natural aging hardness and high artificial aging strength |
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| JPH05156402A (en) * | 1991-11-29 | 1993-06-22 | Furukawa Alum Co Ltd | Aluminum alloy for chassis parts of automobile |
| TW200838394A (en) * | 2007-03-15 | 2008-09-16 | Advanced Material Specialty Inc | High strength aluminum alloy applicable to case of electronic products and the manufacture method thereof |
| CN106011560A (en) * | 2016-07-13 | 2016-10-12 | 苏州中色研达金属技术有限公司 | High-performance 5xxx series aluminium alloy and processing method thereof |
-
2018
- 2018-01-05 CN CN201810012344.2A patent/CN110004337A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05156402A (en) * | 1991-11-29 | 1993-06-22 | Furukawa Alum Co Ltd | Aluminum alloy for chassis parts of automobile |
| TW200838394A (en) * | 2007-03-15 | 2008-09-16 | Advanced Material Specialty Inc | High strength aluminum alloy applicable to case of electronic products and the manufacture method thereof |
| CN106011560A (en) * | 2016-07-13 | 2016-10-12 | 苏州中色研达金属技术有限公司 | High-performance 5xxx series aluminium alloy and processing method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会: "《中国人民共和国国家标准 变形铝及铝合金化学成分》", 17 June 2008 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112877623A (en) * | 2019-11-29 | 2021-06-01 | 中国科学院金属研究所 | Aluminum alloy and aluminum matrix composite for preparing aluminum matrix composite with low natural aging hardness and high artificial aging strength |
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