CN105081328A - Manufacturing method for high-strength aluminum alloy pipe - Google Patents
Manufacturing method for high-strength aluminum alloy pipe Download PDFInfo
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- CN105081328A CN105081328A CN201510472961.7A CN201510472961A CN105081328A CN 105081328 A CN105081328 A CN 105081328A CN 201510472961 A CN201510472961 A CN 201510472961A CN 105081328 A CN105081328 A CN 105081328A
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Abstract
The invention discloses a manufacturing method for a high-strength aluminum alloy pipe. The manufacturing method comprises the following steps of (a) selecting materials and preparing the materials; (b) conducting ball-milling mixing, (c) conducting compression and low-temperature sintering, (d) conducting extrusion forming and (e) conducting strengthening treatment. According to the manufacturing method for the high-strength aluminum alloy pipe, the working procedures are proper, operation is easy and convenient, and cost is appropriate; the manufactured aluminum alloy pipe has stable comprehensive mechanical performance and excellent and stable strength performance, and following machining of the aluminum alloy pipe is facilitated; and the application fields of the aluminum alloy pipe are further broadened.
Description
Technical field
The present invention relates to a kind of preparation method of aluminium alloy pipe, particularly relate to a kind of preparation method of High-strength aluminum alloy pipe, belong to Al-alloy products technical field.
Background technology
Aluminium alloy pipe is the one of nonferrous metal tube, and it is through the tubular metal material of the processes one-tenth such as extruding, drawing along its longitudinal total length hollow by aluminium alloy extrusions.Aluminium alloy pipe can have one or more closed through hole, and wall thickness, cross-sectional uniformity are consistent, can be divided into: square tube, pipe, pattern pipe, shape tube etc. by profile; Can be divided into by fashion of extrusion: seamless aluminium tubing and common extruded tube; Can be divided into by precision: common aluminum pipe and accurate aluminum pipe, wherein accurate aluminum pipe generally needs to reprocess after extrusion, as cold drawn essence is taken out; Can be divided into by rolling thickness: common aluminum pipe and thin-wall aluminium pipe.Due to aluminium alloy pipe have density is little, quality is light, intensity is high and excellent thermal conductivity, solderability, can forge, the performance such as low resistive and machined, aluminium alloy pipe is widely used in all trades and professions, as: automobile, steamer, space flight, aviation, electrical equipment, agricultural, electromechanics, household etc.Aluminium alloy pipe is ubiquitous in our life, has replaced iron and steel, copper material, timber and plastics in a lot of occasion, becomes a kind of important basic material of human society.
Existing aluminium alloy pipe is due to the deficiency of intensity and production technology, and the mechanical properties of tubular goods fluctuation of production is comparatively large, and have impact on the formed machining such as follow-up bending enlarging, percent defective is higher.Therefore, composition and the Technology for Heating Processing of optimizing aluminium alloy pipe are that aluminium alloy pipe manufacturing industry is devoted to goal in research for a long time.
Summary of the invention
For the demand, the invention provides a kind of preparation method of High-strength aluminum alloy pipe, this preparation method's procedure arrangement is reasonable, easy and simple to handle, moderate cost, obtained aluminium alloy pipe comprehensive mechanical property is stablized, and has excellent and stable strength character, is conducive to the following process of aluminium alloy pipe.
The present invention is a kind of preparation method of High-strength aluminum alloy pipe, and this preparation method comprises the steps: that a) selection is got the raw materials ready, b) ball mill mixing, c) die mould and low-temperature sintering, d) extruded, e) intensive treatment.
In a preferred embodiment of the present invention, in described step a), the main component of aluminium alloy pipe raw material is: zinc powder, magnesium powder, copper powder, nickel powder, titanium valve, tungsten powder, silica flour and aluminium powder; The average particulate diameter of zinc powder and copper powder is about 8-10um, the average particulate diameter of magnesium powder is about 15-18um, the average particulate diameter of nickel powder is about 6-8um, the average particulate diameter of titanium valve and tungsten powder is about 1-2um, the average particulate diameter of silica flour is about 4-5um, and the average particulate diameter of aluminium powder is about 3-4um.
In a preferred embodiment of the present invention, in described step b), equipment choosing dry ball, ratio of grinding media to material is 4:1, adds the plasticizer that mass percent is about 3%-3.5% in mechanical milling process; Batch mixing process is as follows: first, and by zinc powder, magnesium powder, copper powder, nickel powder and aluminium powder abundant ball milling 7-8 hour in ball-grinding machine, drum's speed of rotation controls at 35r/min; Then, add quantitative titanium valve, tungsten powder, silica flour and plasticizer, drum's speed of rotation controls at 25r/min, and Ball-milling Time is about 2-3 hour.
In a preferred embodiment of the present invention, in described step c), tamping plant selects iso-static pressure shaping machine, and Stress control is at 60-70MPa; Electrical resistance sintering stove selected by agglomerating plant, and processing procedure is as follows: first, vacuumizes sintering furnace; Then, sintering furnace is warming up to 450 DEG C-550 DEG C, programming rate controls at 10 DEG C/min, and controling of the pressure of the oven is at 70MPa, and the sintering time of blank is 2-2.5 hour; Then, furnace temperature is risen to 600 DEG C-620 DEG C, logical nitrogen protection, furnace pressure remains unchanged, and continues sintering processes 3-3.5 hour; Finally, blank in stove slow cooling to room temperature.
In a preferred embodiment of the present invention, in described step d), the preheat temperature of hot-extrusion mold controls at 500 DEG C-520 DEG C, and extrusion speed is 1.2-1.3m/min, carries out the annealing in process of 1-1.5 hour after extruded in 300 DEG C of-350 DEG C of temperature.
In a preferred embodiment of the present invention, in described step e), first, semi-finished product are carried out intensive treatment in the temperature of 420 DEG C-450 DEG C, the processing time is 3-3.5 hour; Then, be warming up to 480 DEG C-500 DEG C, continue intensive treatment 5 hours; Then, in the deep fat of 120 DEG C-140 DEG C, carry out Quenching Treatment, the processing time is 40-50 minute, and carries out temper in 300 DEG C of-350 DEG C of temperature, and the processing time is 3-4 hour; Finally, air cooling is to room temperature.
Present invention is disclosed a kind of preparation method of High-strength aluminum alloy pipe, this preparation method's procedure arrangement is proper, easy and simple to handle, moderate cost, obtained aluminium alloy pipe comprehensive mechanical property is stablized, and there is excellent and stable strength character, be conducive to the following process of aluminium alloy pipe, further expand the application of aluminium alloy pipe.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the process figure of the preparation method of embodiment of the present invention High-strength aluminum alloy pipe.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Fig. 1 is the process figure of the preparation method of embodiment of the present invention High-strength aluminum alloy pipe; This preparation method comprises the steps: that a) selection is got the raw materials ready, b) ball mill mixing, c) die mould and low-temperature sintering, d) extruded, e) intensive treatment.
Embodiment 1
The concrete preparation method of the High-strength aluminum alloy pipe that the present invention mentions is as follows:
A) selection is got the raw materials ready, and main component and the percentage composition proportioning thereof of aluminium alloy pipe raw material are: zinc powder 4.4%, magnesium powder 2.4%, copper powder 1.4%%, nickel powder 0.27%, titanium valve 0.08%, tungsten powder 0.07%, silica flour 0.2%, and surplus is aluminium powder; The average particulate diameter of zinc powder and copper powder is about 8-10um; The average particulate diameter of magnesium powder is about 15-18um; The average particulate diameter of nickel powder is about 6-8um; The average particulate diameter of titanium valve and tungsten powder is about 1-2um; The average particulate diameter of silica flour is about 4-5um; The average particulate diameter of aluminium powder is about 3-4um;
B) ball mill mixing, equipment choosing dry ball, ratio of grinding media to material is 4:1, and add the plasticizer that mass percent is about 3% in mechanical milling process, the present embodiment selects absolute alcohol; Batch mixing process is as follows: first, and by zinc powder, magnesium powder, copper powder, nickel powder and aluminium powder abundant ball milling 7-7.5 hour in ball-grinding machine, drum's speed of rotation controls at 35r/min; Then, add quantitative titanium valve, tungsten powder, silica flour and plasticizer, drum's speed of rotation controls at 25r/min, and Ball-milling Time is about 2-2.5 hour;
C) die mould and low-temperature sintering, tamping plant selects iso-static pressure shaping machine, and Stress control is at 60-65MPa; Electrical resistance sintering stove selected by agglomerating plant, and processing procedure is as follows: first, vacuumizes sintering furnace; Then, sintering furnace is warming up to 450 DEG C-500 DEG C, programming rate controls at 10 DEG C/min, and controling of the pressure of the oven is at 70MPa, and the sintering time of blank is 2.5 hours; Then, furnace temperature is risen to about 600 DEG C, logical nitrogen protection, furnace pressure remains unchanged, and continues sintering processes 3.5 hours; Finally, blank in stove slow cooling to room temperature;
D) extruded, the preheat temperature of hot-extrusion mold controls at 500 DEG C, and extrusion speed is 1.2m/min, carries out the annealing in process of 1.5 hours after extruded in 300 DEG C of-320 DEG C of temperature;
E) intensive treatment, first, semi-finished product are carried out intensive treatment in the temperature of 420 DEG C, the processing time is 3.5 hours; Then, be warming up to 480 DEG C, continue intensive treatment 5 hours; Then, in the deep fat of 120 DEG C, carry out Quenching Treatment, the processing time is 50 minutes, and carries out temper in 300 DEG C of-320 DEG C of temperature, and the processing time is 4 hours; Finally, air cooling is to room temperature.
Embodiment 2
The concrete preparation method of the High-strength aluminum alloy pipe that the present invention mentions is as follows:
A) selection is got the raw materials ready, and main component and the percentage composition proportioning thereof of aluminium alloy pipe raw material are: zinc powder 4.5%, magnesium powder 2.3%, copper powder 1.5%, nickel powder 0.26%, titanium valve 0.09%, tungsten powder 0.06%, silica flour 0.2%, and surplus is aluminium powder; The average particulate diameter of zinc powder and copper powder is about 8-10um; The average particulate diameter of magnesium powder is about 15-18um; The average particulate diameter of nickel powder is about 6-8um; The average particulate diameter of titanium valve and tungsten powder is about 1-2um; The average particulate diameter of silica flour is about 4-5um; The average particulate diameter of aluminium powder is about 3-4um;
B) ball mill mixing, equipment choosing dry ball, ratio of grinding media to material is 4:1, and add the plasticizer that mass percent is about 3.5% in mechanical milling process, the present embodiment selects atoleine; Batch mixing process is as follows: first, and by zinc powder, magnesium powder, copper powder, nickel powder and aluminium powder abundant ball milling 7.5-8 hour in ball-grinding machine, drum's speed of rotation controls at 35r/min; Then, add quantitative titanium valve, tungsten powder, silica flour and plasticizer, drum's speed of rotation controls at 25r/min, and Ball-milling Time is about 2.5-3 hour;
C) die mould and low-temperature sintering, tamping plant selects iso-static pressure shaping machine, and Stress control is at 65-70MPa; Electrical resistance sintering stove selected by agglomerating plant, and processing procedure is as follows: first, vacuumizes sintering furnace; Then, sintering furnace is warming up to 500 DEG C-550 DEG C, programming rate controls at 10 DEG C/min, and controling of the pressure of the oven is at 70MPa, and the sintering time of blank is 2 hours; Then, furnace temperature is risen to about 620 DEG C, logical nitrogen protection, furnace pressure remains unchanged, and continues sintering processes 3 hours; Finally, blank in stove slow cooling to room temperature;
D) extruded, the preheat temperature of hot-extrusion mold controls at 520 DEG C, and extrusion speed is 1.3m/min, carries out the annealing in process of 1 hour after extruded in 340 DEG C of-350 DEG C of temperature;
E) intensive treatment, first, semi-finished product are carried out intensive treatment in the temperature of 440 DEG C, the processing time is 3 hours; Then, be warming up to 500 DEG C, continue intensive treatment 5 hours; Then, in the deep fat of 140 DEG C, carry out Quenching Treatment, the processing time is 40 minutes, and carries out temper in 330 DEG C of-340 DEG C of temperature, and the processing time is 3.5 hours; Finally, air cooling is to room temperature.
Present invention is disclosed a kind of preparation method of High-strength aluminum alloy pipe, be characterized in: this preparation method's procedure arrangement is proper, easy and simple to handle, moderate cost, obtained aluminium alloy pipe comprehensive mechanical property is stablized, and there is excellent and stable strength character, be conducive to the following process of aluminium alloy pipe, further expand the application of aluminium alloy pipe.
The above; be only the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those of ordinary skill in the art are in the technical scope disclosed by the present invention; the change can expected without creative work or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should limit with claims is as the criterion.
Claims (6)
1. a preparation method for High-strength aluminum alloy pipe, is characterized in that, this preparation method comprises the steps: that a) selection is got the raw materials ready, b) ball mill mixing, c) die mould and low-temperature sintering, d) extruded, e) intensive treatment.
2. the preparation method of High-strength aluminum alloy pipe according to claim 1, is characterized in that, in described step a), the main component of aluminium alloy pipe raw material is: zinc powder, magnesium powder, copper powder, nickel powder, titanium valve, tungsten powder, silica flour and aluminium powder; The average particulate diameter of zinc powder and copper powder is about 8-10um, the average particulate diameter of magnesium powder is about 15-18um, the average particulate diameter of nickel powder is about 6-8um, the average particulate diameter of titanium valve and tungsten powder is about 1-2um, the average particulate diameter of silica flour is about 4-5um, and the average particulate diameter of aluminium powder is about 3-4um.
3. the preparation method of High-strength aluminum alloy pipe according to claim 1, is characterized in that, in described step b), and equipment choosing dry ball, ratio of grinding media to material is 4:1, adds the plasticizer that mass percent is about 3%-3.5% in mechanical milling process; Batch mixing process is as follows: first, and by zinc powder, magnesium powder, copper powder, nickel powder and aluminium powder abundant ball milling 7-8 hour in ball-grinding machine, drum's speed of rotation controls at 35r/min; Then, add quantitative titanium valve, tungsten powder, silica flour and plasticizer, drum's speed of rotation controls at 25r/min, and Ball-milling Time is about 2-3 hour.
4. the preparation method of High-strength aluminum alloy pipe according to claim 1, is characterized in that, in described step c), tamping plant selects iso-static pressure shaping machine, and Stress control is at 60-70MPa; Electrical resistance sintering stove selected by agglomerating plant, and processing procedure is as follows: first, vacuumizes sintering furnace; Then, sintering furnace is warming up to 450 DEG C-550 DEG C, programming rate controls at 10 DEG C/min, and controling of the pressure of the oven is at 70MPa, and the sintering time of blank is 2-2.5 hour; Then, furnace temperature is risen to 600 DEG C-620 DEG C, logical nitrogen protection, furnace pressure remains unchanged, and continues sintering processes 3-3.5 hour; Finally, blank in stove slow cooling to room temperature.
5. the preparation method of High-strength aluminum alloy pipe according to claim 1, it is characterized in that, in described step d), the preheat temperature of hot-extrusion mold controls at 500 DEG C-520 DEG C, extrusion speed is 1.2-1.3m/min, carries out the annealing in process of 1-1.5 hour after extruded in 300 DEG C of-350 DEG C of temperature.
6. the preparation method of High-strength aluminum alloy pipe according to claim 1, is characterized in that, in described step e), first, semi-finished product are carried out intensive treatment in the temperature of 420 DEG C-450 DEG C, the processing time is 3-3.5 hour; Then, be warming up to 480 DEG C-500 DEG C, continue intensive treatment 5 hours; Then, in the deep fat of 120 DEG C-140 DEG C, carry out Quenching Treatment, the processing time is 40-50 minute, and carries out temper in 300 DEG C of-350 DEG C of temperature, and the processing time is 3-4 hour; Finally, air cooling is to room temperature.
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| CN105522146A (en) * | 2015-12-24 | 2016-04-27 | 宁波天阁汽车零部件有限公司 | Air compressor shell of turbocharger and manufacturing method of air compressor shell |
| CN105603229A (en) * | 2016-02-04 | 2016-05-25 | 青岛中科应化技术研究院 | Preparation method of corrosion-resistant aluminum alloy |
| CN107695340A (en) * | 2017-10-10 | 2018-02-16 | 浙江跃进机械有限公司 | Aluminum base powder metallurgy forges the preparation method of engine link |
| CN107695339A (en) * | 2017-10-10 | 2018-02-16 | 浙江跃进机械有限公司 | A kind of preparation method of aluminum base powder metallurgy forging engine link |
| CN108479825A (en) * | 2018-04-11 | 2018-09-04 | 郭凯 | A kind of catalyst and preparation method thereof of catalytic pyrolysis benzene class and its derivative |
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