CN108213110A - A kind of preparation method of catheter blank and aluminum alloy conduit - Google Patents
A kind of preparation method of catheter blank and aluminum alloy conduit Download PDFInfo
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- CN108213110A CN108213110A CN201711481541.0A CN201711481541A CN108213110A CN 108213110 A CN108213110 A CN 108213110A CN 201711481541 A CN201711481541 A CN 201711481541A CN 108213110 A CN108213110 A CN 108213110A
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- hollow ingot
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
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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
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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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Abstract
The present invention provides a kind of preparation method of catheter blank, including：It is squeezed after hollow ingot is heated, obtains catheter blank；The hollow ingot cuts gradient≤2mm；Wall-Thickness Difference≤2mm of the hollow ingot；The curvature of the hollow ingot is 0.45~0.55mm.The present invention is specifically controlled by cut gradient, Wall-Thickness Difference and the curvature to hollow ingot, and the catheter blank being prepared is made to have good dimensional accuracy.The present invention also provides a kind of preparation method of aluminum alloy conduit, including：The catheter blank that above-mentioned technical proposal is prepared carry out successively straightening, erosion wash, roll, tube reducing annealing, drawing, aligning, cleaning, detection, finished products, obtain aluminum alloy conduit.
Description
Technical field
The present invention relates to technical field of aluminum alloy technology more particularly to the preparation methods of a kind of catheter blank and aluminum alloy conduit.
Background technology
LF2 alloy thin-wall pipes are widely used in the oil circuit conduit of space shuttle.At present, it is asked existing for LF2 alloy thin-walls pipe
Topic mainly include dimensional accuracy, surface quality (surface wipe scuffing, draw bead, press-in, dent), bend test orange peel (spend by crystal grain
The problems such as greatly) and being flared air seal test gas leakage.
Therefore, it is badly in need of being improved the production technology of LF2 conduits at present, to improve its quality.
Invention content
In view of this, the purpose of the present invention is to provide the preparation method of a kind of catheter blank and aluminum alloy conduit, sheets
The preferable catheter blank of dimensional accuracy can be prepared in the method that invention provides.
The present invention provides a kind of preparation method of catheter blank, including：
It is squeezed after hollow ingot is heated, obtains catheter blank；
The hollow ingot cuts gradient≤2mm；
Wall-Thickness Difference≤2mm of the hollow ingot；
The curvature of the hollow ingot is 0.4~0.6mm.
In the present invention, the preparation method of the hollow ingot is preferably：
Solid ingot is subjected to railway carriage and bore hole, obtains hollow ingot.
In the present invention, the ingredient of the solid ingot is preferably：
The silicon of 0~0.40wt%；
The iron of 0~0.40wt%；
The copper of 0~0.10wt%；
The manganese of 0.15~0.40wt%；
The magnesium of 2.0~2.5wt%；
The titanium of 0~0.15wt%；
The gross mass content of iron and silicon is not more than 0.6%；
Surplus is aluminium.
In the present invention, the mass content of the silicon is preferably 0.15~0.35%, and more preferably 0.2~0.3%；It is described
The mass content of iron is preferably 0.15~0.35%, and more preferably 0.2~0.3%；The mass content of the copper is preferably 0.02
~0.08%, more preferably 0.04~0.06%；The mass content of the manganese is preferably 0.2~0.35%, and more preferably 0.25
~0.3%；The mass content of the magnesium is preferably 2.1~2.4%, and more preferably 2.2~2.3%；The mass content of the titanium
Preferably 0.02~0.12%, more preferably 0.04~0.1%, most preferably 0.06~0.08%.In the present invention, the iron
Total mass content is preferably 0~0.6% with silicon, more preferably 0.2~0.5%, most preferably 0.3~0.4%.
In the present invention, the hollow ingot is to be formed by solid ingot through railway carriage Boring.The present invention is to the railway carriage boring
The method in hole does not have special limitation, is machined i.e. using the method for railway carriage bore hole well known to those skilled in the art
It can.
In the present invention, the hollow ingot outer surface roughness preferably≤Ra12.5, more preferably Ra6.3~12.5,
More preferably Ra3.2~6.3, most preferably Ra1.6~3.2.In the present invention, the outside diameter tolerance of the hollow ingot preferably ±
0.5~± 1.5mm, most preferably more preferably ± 0.8~± 1.2mm, ± 1mm.In the present invention, the internal diameter of the hollow ingot
Deviation is preferably ± 0.5~± 1mm, more preferably ± 0.6~± 0.9mm, most preferably ± 0.7~± 0.8mm.In the present invention
In, the length variation of the hollow ingot is preferably ± 4~± 8mm, most preferably more preferably ± 5~± 7mm, ± 6mm.
In the present invention, the hollow ingot cut gradient preferably≤1.5mm, more preferably 0~1.2mm, more preferably 0.2
~1mm, more preferably 0.4~0.8mm, most preferably 0.5~0.6mm.In the present invention, the Wall-Thickness Difference of the hollow ingot is preferred
≤ 0.75mm, more preferably 0~0.7mm, more preferably 0.1~0.6mm, more preferably 0.2~0.5mm, most preferably 0.3~
0.4mm.In the present invention, the curvature of the hollow ingot is preferably 0.4~0.6mm, more preferably 0.5mm；The curvature
Refer to the curvature in every 500mm length.
In the present invention, the hollow ingot heating carries out preferably in induction heater, the temperature of the hollow ingot heating
Preferably 450~520 DEG C, more preferably 460~500 DEG C, most preferably 470~490 DEG C.
In the present invention, in the extrusion process hollow ingot length preferably≤350mm, more preferably 50~300mm, more
Preferably 100~250mm, more preferably 150~250mm, most preferably 200mm.In the present invention, it is worn in the extrusion process
The length of hole needle is preferably 200~850mm, more preferably 250~800mm, more preferably 300~750mm, and more preferably 350
~700mm, more preferably 400~650mm, more preferably 450~600mm, more preferably 500~550mm, most preferably
240mm, 630mm, 730mm or 830mm.
In the present invention, the outer diameter of hollow ingot is preferably 30~32mm in the extrusion process, more preferably 31mm；It is described
The internal diameter of hollow ingot is preferably 24~26mm, more preferably 25mm；The wall thickness of the hollow ingot is preferably 2.5~4mm, more preferably
For 3~3.5mm.In the present invention, the diameter of the extrusion process middle punch needle is preferably 24~26mm, more preferably 25mm.
In the present invention, the catheter blank being prepared can be made using the pecker of length described in above-mentioned technical proposal
Wall-Thickness Difference is obviously reduced, and further improves the dimensional accuracy for the catheter blank being prepared.
In the present invention, the method for the extruding is preferably unlubricated extruding, and present invention preferably uses above-mentioned technical proposals
The pecker of the length carries out unlubricated extruding, and pressing method provided by the invention can avoid the catheter blank being prepared
There is the defects of peeling, recess in inner wall, improves the inner surface quality of catheter blank.
In the present invention, the extrusion speed in the extrusion process is preferably 1~2.5m/min, more preferably 1.3~
2.2m/min, more preferably 1.5~2m/min, most preferably 1.6~1.8m/min；Extrusion temperature in the extrusion process is excellent
It is selected as 440~460 DEG C, more preferably 445~455 DEG C, most preferably 450 DEG C；Extrusion ratio in the extrusion process is preferably
15~45, more preferably 20~40, more preferably 25~35, most preferably 30.
In the present invention, the bending acting as in elimination extrusion process of the straightening, convenient for follow-up operation of rolling punching
Bar, the extensibility during the straightening are preferably 0.5~2.0%, more preferably 0.8~1.6%, more preferably 1~
1.4%, most preferably 1.2~1.3%.
In the present invention, what the erosion was washed act as slight wiping scuffing, the aluminium skimmings hair that removal pipe woollen extrusion process generates
Thorn etc., the method washed of losing is preferably that soda acid is washed, and the specific method washed that loses is preferably：
The aluminium skimmings inside the aluminium alloy pipe after straightening are blown off with compressed air, successively carry out clear water wash, pickling, cold water
Wash (neutralization chamber), alkali cleaning, cold water are washed (neutralization chamber), pickling and clear water and washed.
It is in the present invention, preferred before the rolling to check whether the catheter blank surfaces externally and internally lost after washing meets the requirements,
If catheter blank has apparent peeling, wipes the defects of scratching, cope with undesirable material and finally concentrate rolling, independent bundling is simultaneously noted
It is bright.There is the pipe woollen of major defect, should choose in time and cut useless processing.In the present invention, it is preferred to it when rolling mode and rolled
The waste material (such as dimension overproof, surfaces externally and internally defect) generated in journey, cuts useless in time, never allows to be mixed into the conjunction normally produced
In lattice material.In the present invention, during the rolling, lubricating oil preferably requires to clean, and must not have the fouls such as sand, metal fragment.Profit
The lubricating oil circulatory system should have intact filter device.
In the present invention, the milling method is preferably two roller cold pilgered pipe methods, the feeding in the operation of rolling
Amount is preferably no greater than 3.0mm, most preferably more preferably 0~3mm, more preferably 0.5~2.5mm, 1~2mm.In the present invention
In, the outer diameter tolerance of the tubing obtained after the rolling is preferably ± 0.5mm~± 1.5mm, and more preferably ± 0.8mm~±
1.2mm, most preferably ± 1mm；The wall thickness tolerance of the tubing obtained after the rolling is preferably ± 0.05mm~± 0.1mm, more
Preferably ± 0.06mm~± 0.08mm, most preferably ± 0.07mm；The average wall thickness tolerance of the tubing obtained after the rolling
Preferably+0.02~-0.01mm, more preferably+0.01~-0.005mm.In the present invention, the tubing obtained after the rolling
The defects of surface is chewed preferably without wiping scuffing, metal or nonmetallic press-in, load mould, crackle, breach, overlap, wave, pass.
In the present invention, the tube reducing annealing can discharge the stress of product after rolling, increase the extension of product after rolling
Property and toughness, convenient for subsequently carrying out drawing.In the present invention, the temperature of tube reducing annealing is preferably 195~205 DEG C, more preferably
198~202 DEG C, most preferably 200 DEG C；The time of tube reducing annealing is preferably 0.5~1.5 hour, more preferably 0.8~
1.2 hours, most preferably 1 hour.
In the present invention, the elliptical wave for acting as tube reducing, eliminating the operation of rolling of the drawing, it is accurate control conduit into
Product outer diameter tolerance；The Hubbing method is preferably that sky is drawn, every time sizing reduction is preferably no greater than 3mm in the drawing process, more
Preferably 0.5~2.5mm, more preferably 1~2mm, most preferably 1.5mm.In the present invention, the tubing obtained after the drawing
Surface preferably without road plan, scratch, crackle, peeling, press-in object, it is stupefied son, jump ring, cross vast sky draw section the defects of.In the present invention,
The outer diameter tolerance of tubing after the drawing is preferably controlled in -0.15~0mm, more preferably -0.12~0mm, more preferably -
0.1~0mm, most preferably -0.05~0mm.
In the present invention, it is preferred to drawing at a slow speed, stretch as possible (the especially catheter blank of finished product outer diameter >=50mm, subsequently
Straightening processing will no longer be carried out)；The catheter blank of outer diameter≤12mm, the preferred bundling in drawing process often tie diameter preferably not
More than 100mm.
In the present invention, during the drawing debugging production, if preferably finding, tubing sticking to mould or outer diameter are overproof, should choose in time
Go out.It often to be inspected by random samples in drawing process, underproof material will be chosen during sampling observation, never allow to be mixed into the conjunction normally produced
In lattice material.After expecting to have produced by the gross, underproof material concentration is cut useless.In the present invention, it is preferable to use special during the drawing
It is produced with tool and mould.Conduit drawing tool and mould (including mold, core print etc.) implements concrete management.
In the present invention, the elimination that act as of the aligning is bent.In the present invention, the method for the aligning is preferably roller
(roll straightening) or tension straingtening are rectified, more preferably roller is rectified.Preferred roll straightening roll surface is smooth not damaged in the straightening process,
Nothing has the fouls such as metal fillings.In the present invention, it was discovered that answering timely processing when having foul, viscous metal on roll surface, having damage, roll-type is rectified
Straight complete tube surfaces are preferably bright and clean, without have scuffing, damage, the press-in of load mould, metal, serious spiral trace the defects of, in this hair
In bright, the outside diameter tolerance of tubing, ovality and curvature should meet technical conditions requirement after the aligning.
In the present invention, the lubrication for acting as conduit surfaces externally and internally in cleaning drawing process of the cleaning (finished product is washed)
Oil, the method for the cleaning preferably first carries out hot water wash and then progress kerosene is washed, and the method for the cleaning is preferably：
Before cleaning, the aluminium skimmings in tubing are blown clean with compressed air；Tubing first in hot water is cleaned, is risen up and down
Drop, scavenging period are moderate；After hot water cleaning, tubing is placed in kerosene slot and is cleaned, oscilaltion, tubing surfaces externally and internally greasy dirt
It cleans up, scavenging period is unlimited.
In the present invention, the detection (finished product preliminary examination) act as check catheter outer diameter, wall thickness and surface quality, will not
Certified products select cut it is useless.
In the present invention, the method for the finished products preferably includes following steps：
(1) empty stove constant temperature to 480~500 DEG C after reaching predetermined temperature is kept the temperature, carries out baker；
(2) it is rapid to carry out hot stove charging after baker, complete shove charge；
(3) furnace temperature is set as 430~450 DEG C of heat preservations after shove charge, is made annealing treatment；
(4) it comes out of the stove rapidly, carries out air-cooled after the completion of annealing；
The shove charge is accomplished to the time≤65min to come out of the stove.
Present invention preferably employs the method for the finished products described in above-mentioned technical proposal, this method can ensure to prepare
The Crystallite Sizes On The Surface of aluminum alloy conduit is improved while obtained aluminum alloy conduit performance is met the requirements, aluminum alloy conduit is avoided to exist
In later stage bending process, there is " orange peel " phenomenon in curved surface.Present invention preferably employs above-mentioned high temperature, short time, quick heating coolings
Annealing process, hot stove charging can be such that the metal temperature of tubing is climbed to more than recrystallization temperature, after short time heat preservation, metal
With regard to recrystallization process can be completed.It is quickly cooled down after coming out of the stove, can effectively prevent crystal grain and grow up.Improve heating cooling velocity, Ke Yiyou
Imitate crystal grain thinning.The present invention uses high temperature, short-cycle annealing technique, can inhibit crystal grain coarsening rate, plays the role of crystal grain refinement,
And then avoid the later stage when being bent curved surface generate " orange peel ".
In the present invention, the finished products preferably carry out in 1.5T annealing furnaces.In the present invention, the step (1)
In soaking time be preferably 10~30min, more preferably 15~25min, most preferably 20min；Guarantor in the step (3)
The warm time is preferably 10~30min, more preferably 15~25min, most preferably 20min.In the present invention, the hot stove charging
Preferably close fire door immediately afterwards.In the present invention, the air-cooled method preferably machine that blows in is quickly cooled down.
In the present invention, the highly preferred of annealing charging basket is 200mm~350mm during the finished products；More preferably
For 250~300mm；The batch of the annealing charging basket is preferably the conduit of outer diameter ＞ Ф 20mm, can fill basket；Ф20mm≥
The conduit of outer diameter ＞ Ф 10mm, every basket of work loading height are preferably more than half basket；The conduit of outer diameter≤Ф 10mm, every basket of charging
It is highly preferred to be no more than 100mm.The present invention is preferably evenly laid out by tubing when filling basket.Using the above-mentioned annealing charging basket of the present invention
And batch can ensure well-ventilated, make annealing more abundant.
Compared with prior art, the present invention is specifically controlled by cut gradient, Wall-Thickness Difference and the curvature to hollow ingot
System makes the catheter blank being prepared have good dimensional accuracy.
Specific embodiment
The technical solution in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example is only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff it is improved or retouching all other example, shall fall within the protection scope of the present invention.
Embodiment 1
Solid ingot is subjected to railway carriage and bore hole, obtains hollow ingot；The ingredient of the solid ingot is：The silicon of 0.06wt%；
The iron of 0.16wt%；The copper of 0.02wt%；The manganese of 0.31wt%；The magnesium of 2.48wt%；The titanium of 0.01wt%；Total matter of iron and silicon
Measure content 0.22%；Surplus is aluminium.
The hollow ingot cuts gradient as 1.8mm；The Wall-Thickness Difference of the hollow ingot is 1.8mm；The bending of the hollow ingot
It spends for 0.5mm；The outside diameter tolerance of the hollow ingot is+1mm；The inner diameter deviation of the hollow ingot is -1mm；The hollow ingot
Length variation is+6mm；Outer surface roughness≤Ra12.5 of the hollow ingot, inside surface roughness≤Ra6.3.
The hollow ingot on the extruder after 480 DEG C of heating in 2500T is squeezed, obtains catheter blank；The extruding
For unlubricated extruding, the length of the pecker in the extrusion process is 630mm；The length of hollow ingot is in the extrusion process
250mm, the internal diameter of hollow ingot is 70mm, outer diameter 78mm, thickness 4mm, described in the extrusion process in extrusion process
Extrusion speed is 2m/min, extrusion temperature is 450 DEG C, extrusion ratio 33.42.
Embodiment 2
Catheter blank is prepared in method according to embodiment 1；Difference lies in the hollow ingot is cut with embodiment 1
Gradient is 1.5mm；The Wall-Thickness Difference of the hollow ingot is 0.75mm；It is squeezed on the extruder of 600T, the length of pecker is
240mm；The length of hollow ingot is 200mm in the extrusion process, and the internal diameter of hollow ingot is 25mm, outer diameter 31mm, and thickness is
3mm。
Embodiment 3
Catheter blank is prepared in method according to embodiment 1；Difference lies in the hollow ingot is cut with embodiment 1
Gradient is 1mm；The Wall-Thickness Difference of the hollow ingot is 0.5mm；The curvature of the hollow ingot is 0.45mm.
Embodiment 4
Catheter blank is prepared in method according to embodiment 1, with embodiment 1 difference lies in during, extruding using containing
The lubricating oil of graphite powder smears pecker, and the length of pecker is 1030mm.
Comparative example 1
Catheter blank is prepared in method according to embodiment 1；Difference lies in the hollow ingot is cut with embodiment 1
Gradient is 2.5mm.
Comparative example 2
Catheter blank is prepared in method according to embodiment 1；Difference lies in the walls of the hollow ingot with embodiment 1
Thick difference is 2.5mm.
Comparative example 3
Catheter blank is prepared in method according to embodiment 1；Difference lies in the curved of, the hollow ingot with embodiment 1
Curvature is 0.6mm.
Embodiment 5
Using outside micrometer and wall thickness micrometer gauge, the embodiment of the present invention is tested and catheter blank that comparative example is prepared
Dimensional accuracy, testing result is as shown in table 1, the ruler of catheter blank that table 1 is prepared for the embodiment of the present invention and comparative example
Very little precision.
The dimensional accuracy of catheter blank that 1 embodiment of the present invention of table and comparative example are prepared
Embodiment 6
Solid ingot is subjected to railway carriage and bore hole, obtains hollow ingot；The ingredient of the solid ingot is：The silicon of 0.06wt%；
The iron of 0.15wt%；The copper of 0.02wt%；The manganese of 0.26wt%；The magnesium of 2.49wt%；The titanium of 0.02wt%；Iron and silicon it is total
Mass content is 0.24%；Surplus is aluminium.
The hollow ingot cuts gradient as 1.6mm；The Wall-Thickness Difference of the hollow ingot is 1.7mm；The bending of the hollow ingot
It spends for 0.5mm；The outside diameter tolerance of the hollow ingot is+1mm；The inner diameter deviation of the hollow ingot is -0.5mm；The hollow ingot
Length variation be -6mm；Outer surface roughness≤Ra12.5 of the hollow ingot, inside surface roughness≤Ra6.3.
The hollow ingot on the extruder after 500 DEG C of heating in 2500T is squeezed, obtains catheter blank；The extruding
For unlubricated extruding, the length of the pecker in the extrusion process is 730mm；The length of hollow ingot is in the extrusion process
300mm, the internal diameter of hollow ingot is 80mm, outer diameter 88mm, thickness 4mm；Extrusion speed in the extrusion process is 1.5m/
Min, extrusion temperature are 455 DEG C, extrusion ratio 26.31.
The catheter blank obtained after extruding is subjected to straightening, the extensibility during the straightening is 1.5%；
Product after straightening is carried out erosion to wash, the method washed of losing is：
The aluminium skimmings inside the tubing after straightening are blown off with compressed air, carry out successively clear water wash, pickling, cold water wash (in
And slot), alkali cleaning, cold water washes (neutralization chamber), pickling and clear water and washes.
By lose wash after product roll, the milling method be two roller cold pilgered pipe methods, the operation of rolling
In feeding amount be 2.0mm；The outer diameter tolerance of the tubing obtained after the rolling is+1mm；The tubing obtained after the rolling
Wall thickness tolerance is -0.07mm；The average wall thickness tolerance of the tubing obtained after the rolling is+0.01mm.
Product after rolling is subjected to tube reducing annealing, the temperature of tube reducing annealing is 200 DEG C, the tube reducing annealing when
Between be 1 hour.
Product after tube reducing is annealed carries out drawing, and the method for the drawing is drawn to be empty, it is described it is empty draw during every time
Sizing reduction is 2.5mm.
Product after drawing is aligned, the method for the aligning is roll straightening.
Product after aligning is cleaned, the method for the cleaning is：
Before cleaning, the aluminium skimmings in tubing are blown clean with compressed air；Tubing first in hot water is cleaned, is risen up and down
Drop, scavenging period are moderate；After hot water cleaning, tubing is placed in kerosene slot and is cleaned, oscilaltion, tubing surfaces externally and internally greasy dirt
It cleans up, scavenging period is unlimited.
Product after cleaning is subjected to outer wall, wall thickness and surface quality detection；
Qualified product will be detected and carry out finished products, obtain aluminum alloy conduit；The method of the finished products is：
Carried out in 1.5T annealing furnaces, empty 480~500 DEG C of stove constant temperature, to temperature after keep the temperature 25min；After baker, rapidly
Hot stove feeds；Fire door is closed after charging immediately, furnace temperature, which changes, is set as 430~450 DEG C, to temperature after keep the temperature 25min, from closing
Fire door terminates whole no more than 65min to heat preservation.It after heat preservation, comes out of the stove rapidly, and the machine that blows in is quickly cooled down.
The dimensional accuracy of aluminum alloy conduit that the detection embodiment of the present invention 6 is prepared according to the method described above, testing result
For the outside diameter tolerance for the aluminum alloy conduit that the embodiment of the present invention 6 is prepared is -0.06mm, and Wall-Thickness Difference is ± 0.07mm.
The conduit that the embodiment of the present invention 6 is prepared is carried out to cut open pipe range estimation, the detection embodiment of the present invention 6 is prepared
The inner surface quality of aluminum alloy conduit, testing result be, the aluminum alloy conduit inner surface that the embodiment of the present invention 6 is prepared is without rising
Skin, pit defect.
According to GB/T228《Metal material tensile testing at ambient temperature》、GB/T3246.2《It deforms aluminium and Al-alloy products is low
Times histological test method》Standard, the tensile strength and surface microstructure of aluminum alloy conduit that the detection embodiment of the present invention 6 is prepared
Degree, testing result are that tensile strength is 210~220MPa, and grain size is 1 grade.The aluminium alloy that the embodiment of the present invention 6 is prepared
Catheter surface grain size is smaller, and curved surface is without " orange peel " phenomenon in later stage bending process.
The present invention provides a kind of preparation method of catheter blank, including：It squeezes, is led after hollow ingot is heated
Pipe blank；The hollow ingot cuts gradient≤2mm；Wall-Thickness Difference≤2mm of the hollow ingot；The curvature of the hollow ingot is
0.45~0.55mm.The present invention is specifically controlled by cut gradient, Wall-Thickness Difference and the curvature to hollow ingot, makes to be prepared into
The catheter blank arrived has good dimensional accuracy.
What has been described above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill of the art
For personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of preparation method of catheter blank, including：
It is squeezed after hollow ingot is heated, obtains catheter blank；
The hollow ingot cuts gradient≤2mm；
Wall-Thickness Difference≤2mm of the hollow ingot；
The curvature of the hollow ingot is 0.45~0.55mm.
2. according to the method described in claim 1, it is characterized in that, the hollow ingot cuts gradient≤1.5mm.
3. according to the method described in claim 1, it is characterized in that, Wall-Thickness Difference≤0.75mm of the hollow ingot.
4. according to the method described in claim 1, it is characterized in that, the curvature of the hollow ingot is 0.5mm.
5. according to the method described in claim 1, it is characterized in that, the outside diameter tolerance of the hollow ingot for ± 0.5~±
1.5mm。
6. according to the method described in claim 1, it is characterized in that, the inner diameter deviation of the hollow ingot is ± 0.5~± 1mm.
7. according to the method described in claim 1, it is characterized in that, the length variation of the hollow ingot is ± 4~± 8mm.
8. according to the method described in claim 1, it is characterized in that, the temperature of the heating is 450~520 DEG C.
9. according to the method described in claim 1, it is characterized in that, the length of the extrusion process middle punch needle for 200~
850mm。
10. a kind of preparation method of aluminum alloy conduit, including：
The catheter blank that claim 1 is prepared carry out successively straightening, erosion wash, roll, tube reducing annealing, drawing, aligning, clearly
It washes, detect and finished products, obtain aluminum alloy conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711481541.0A CN108213110B (en) | 2017-12-29 | 2017-12-29 | Preparation method of conduit blank and aluminum alloy conduit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711481541.0A CN108213110B (en) | 2017-12-29 | 2017-12-29 | Preparation method of conduit blank and aluminum alloy conduit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108213110A true CN108213110A (en) | 2018-06-29 |
| CN108213110B CN108213110B (en) | 2020-02-18 |
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| CN201711481541.0A Active CN108213110B (en) | 2017-12-29 | 2017-12-29 | Preparation method of conduit blank and aluminum alloy conduit |
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Cited By (3)
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