CN105039880A - Heat treatment method for small-pipe-nozzle, large-diameter and large-length-diameter-ratio cylindrical aluminum alloy inner container - Google Patents

Heat treatment method for small-pipe-nozzle, large-diameter and large-length-diameter-ratio cylindrical aluminum alloy inner container Download PDF

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CN105039880A
CN105039880A CN201510494770.0A CN201510494770A CN105039880A CN 105039880 A CN105039880 A CN 105039880A CN 201510494770 A CN201510494770 A CN 201510494770A CN 105039880 A CN105039880 A CN 105039880A
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inner bag
heat treatment
inner container
cylindricality
diameter
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CN105039880B (en
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赵磊
阴中炜
韩冬峰
张绪虎
丁俊峰
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China Academy of Launch Vehicle Technology CALT
Aerospace Research Institute of Materials and Processing Technology
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China Academy of Launch Vehicle Technology CALT
Aerospace Research Institute of Materials and Processing Technology
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Abstract

The invention relates to a heat treatment method for a small-pipe-nozzle, large-diameter and large-length-diameter-ratio cylindrical aluminum alloy inner container. According to the structural characteristic that the length of the aluminum alloy inner container is larger, a vertical water entering posture is adopted in quenching treatment, a cooling manner that a spraying system and a water tank are combined is designed, and therefore the cooling speed of a rear water inflow end of a bottle body is increased, the uniformity of the overall mechanical performance of the bottle body is guaranteed, and the design requirement is met. Besides, according to the structural characteristic that the belly portion of the aluminum alloy inner container is large and the nozzle of the aluminum alloy inner container is small, a rear water inflow end pipe nozzle water injection pipeline is designed, a moderate balance weight is added, and therefore the eliminating speed of air in the large-volume and small-pipe-nozzle hollow bottle body is increased, and the quenching and water entering process is smooth. Finally, an inverted conical baffle is further designed on the junction of a rear water entering end socket of the bottle body and the straight line segment of the bottle body, and therefore sprayed water is prevented from making contact with the straight line segment of the bottle body within a short time, and the uniformity of the mechanical performance of the straight line segment of the bottle body and the deformation risk caused by splashing of the sprayed water are reduced.

Description

The cylindricality aluminium alloy inner container heat treating method of little ozzle, major diameter, big L/D ratio
Technical field
The invention belongs to Composite Material in Space gas cylinder manufacturing technology field, be specifically related to the cylindricality aluminium alloy inner container heat treating method of the little ozzle of a kind of composites gas cylinder, major diameter, big L/D ratio.
Background technology
6061 aluminium alloys are heat treatment reinforcement alloy, comprise solid solution and aging strengthening model process, solid solution and aging strengthening model system: at 535 ± 5 DEG C of insulation 120min, shrend, quenching shift time is no more than 60s, again at 165 ± 5 DEG C of insulation 10h, air cooling, the quenching process of wherein solution treatment is the key link that aluminium alloy bottle mechanical property controls.Generally speaking, the solution heat treatment of tank, gas cylinder type III pressure vessel adopts tank direct-water-quenching or spray two kinds of modes, wherein tank quenching is widely used in semisphere or the cylindrical component of reduced size, and spray is applicable to large-size structure, as Japanese H-2 rocket diameter 5m magnitude tank end socket housing quenching (Li Baorong etc., H-2B launch vehicle tank manufacturing technology and application, Aerospace manufacturing technology, 2008 (5): 35-37).At present, domesticly direct tank is generally adopted to quench (Chinese patent, CN201010295347.5 simply for ozzle small in ends (external diameter φ 60 ~ 80mm, endoporus φ 20 ~ 40mm), major diameter (φ 300 ~ 400mm), big L/D ratio (> 2), hollow, cylindricality, no-welding-seam seamless cylinder solution heat treatment; The experimental study of LD31 alloy high-pressure tanks spinning forming process, 8th national rotary pressure technology exchanging meeting, 1999), whole bottle vertical water entry during quenching, but because bottle volume is large, length large, during bottle quenching there is notable difference in upper/lower terminal speed of cooling; In addition, because bottle two ends ozzle is less, the air discharge process in bottle is comparatively slow, and buoyancy effect bottle digging water speed, causes the speed of cooling of rear water intake end bottle low; In addition, during hollow bottle quenching, the difference of digging water speed also affects cooling performance, too fast, in bottle, air is not easily discharged, " hollow " state is to a certain degree formed in bottle, easily cause that bottle floats, bottle internal cooling speed reduces or uneven etc., after crossing slow then bottle, water intake end speed of cooling is not enough.In general, the mechanical property at rear inhalent siphon mouth, end socket and neighbouring straight-line segment position is on the low side, easily cause matrix material bottle hydraulic pressure self-tightening, fatigue or explosive bulge test time ozzle R angle place occur to leak and can not meet design requirement.Therefore, improve " the large mouth of tripe is little " bottle in quenching process after water intake end ozzle, end socket and near the speed of cooling of straight-line segment, the mechanical property of 6061 aluminium alloys is met design requirement most important.
Summary of the invention
The object of the invention is to the problems referred to above overcoming prior art, the cylindricality aluminium alloy inner container heat treating method of little ozzle, major diameter, big L/D ratio is provided, the heat treatment mode adopting spray and shrend to combine, makes the mechanical property of aluminium alloy inner container two ends ozzle, end socket and straight-line segment all can meet design requirement.
Above-mentioned purpose of the present invention is mainly achieved by following technical solution: the cylindricality aluminium alloy inner container heat treating method of little ozzle, major diameter, big L/D ratio, and step is as follows:
Step (one), had at two ends the cylindricality aluminium alloy inner container of little ozzle to be vertically fixedly mounted on heat treatment tooling, described heat treatment tooling comprises end breaket, balancing weight and frame baffle under cylindricality outside framework, inner bag upper end stationary installation, inner bag; Wherein, at cylindricality outside framework end breaket under lower end position fixes inner bag, and under inner bag below end breaket base of frame place balancing weight, aluminium alloy inner container to be vertically placed under inner bag on end breaket, aluminium alloy inner container direct tube section upper end is vertically fixed on cylindricality by stationary installation and expects that frame is near upper end position outward, frame baffle along cylindrical frame circumference parcel, and is fixed on cylindricality outside framework top;
Step (two), the aluminium alloy inner container be vertically mounted on heat treatment tooling is put into heat treatment furnace carry out solution treatment, after being disposed, heat treatment tooling and cylindricality aluminium alloy inner container are hung out and is transferred to above quench treatment tank, in transfer process, spray equipment is moved to fixed position, cylindricality outside framework upper end, when heat treatment tooling drop to inner bag contact with water time, the spray equipment above opening sink water, and rapidly by heat treatment tooling and inner bag submerged;
After step (three), quenching, heat treatment tooling and aluminium alloy inner container are together put into heat treatment furnace and carries out ageing treatment, after being disposed, aluminium alloy inner container is dismantled from heat treatment tooling.
The cylindricality outside framework top center of described heat treatment tooling arranges location annulus, and annulus height is less than aluminium alloy inner container ozzle height, and diameter mates with inner bag upper end nozzle diameter.
The inner bag upper end stationary installation of described heat treatment tooling comprises inverted-cone shape baffle plate, fixed link, the thin bed course of fine aluminium; Wherein, inverted-cone shape baffle plate lower edge is the cylindrical extension that 10 ~ 15mm is high, fit along inner bag straight-line segment direction, and its girth and inner bag straight-line segment upper limb match, and be fixed on inner bag straight-line segment upper limb by clip, inside inverted-cone shape baffle plate extension, lay the thin bed course of fine aluminium, two fixed links are symmetrically welded outside inverted-cone shape baffle plate, fixed link free end is fixed in cylindricality outer frame edges, and inverted-cone shape baffle plate upper limb circumference is less than framework inner circle, and lower than framework upper surface.
Under the inner bag of described heat treatment tooling, end breaket comprises a location annulus and two fixed links; Location annulus is as the center of end breaket under inner bag, and setting circle ring diameter is less than cylindricality inner bag diameter, is greater than inner bag nozzle diameter, is welded in frame edge outside the outer toroid of top with fixed link.
Described spray equipment comprises chilling spray pipeline and the upper end ozzle endoporus water injecting pipeline of inner bag upper end ozzle and end socket; Wherein, inner bag upper end ozzle is connected with water pump with chilling spray pipeline one end of end socket, the other end is equipped with bent angle porous nozzle, ozzle endoporus water injecting pipeline one end, upper end is also connected with water pump, the other end is equipped with right angle pipe shower nozzle, and upper end ozzle endoporus water injecting pipeline pipe diameter is less than frame roof central position setting circle ring diameter.
The present invention compared with prior art has following beneficial effect:
(1), the present invention is directed to the constructional feature of large volume, large length 6061 aluminium alloy inner container, adopt along the vertical water entry of inner bag length direction during shrend, it is the problem of water intake end and upper end speed of cooling deficiency after solution big scale inner bag simultaneously, sprinkling system is added in upper end, inner bag bottle upper/lower terminal ozzle is contacted with water simultaneously, improve the speed of cooling of rear water intake end, make upper/lower terminal ozzle and neighbouring straight-line segment mechanical property meet the design requirements of aluminum alloy materials, ensure the homogeneity of the overall mechanical property of bottle;
(2), the present invention is directed to the constructional feature of large volume, little ozzle aluminium alloy inner container " the large mouth of tripe is little ", for avoiding the inner bag bottle inner air velocity of discharge slow, the problem that the rear water intake end speed of cooling that its buoyancy causes bottle digging water speed to bring slowly is slow, the water injecting pipeline for upper end ozzle endoporus is added in sprinkling system, improve the eliminating speed of air in bottle, increase appropriate counterweight simultaneously, ensure that quenching water-inlet process improves digging water speed smoothly simultaneously, ensure the quenching effect of inner bag bottle further;
(3), the present invention also brings current splashing for sprinkling system and causes the even distortion of bottle straight-line segment inhomogeneous cooling, inverted-cone shape baffle plate is added at bottle upper end end socket and bottle straight-line segment intersection, avoid spray water to contact with bottle straight-line segment in short-term, reduce and cause bottle straight-line segment mechanical property to reduce and risk of distortion because spray water splashes;
(4), the cylindricality aluminium alloy inner container heat treating method technique of the little ozzle of the present invention, major diameter, big L/D ratio is simple, is easy to realize, has stronger practicality.
Accompanying drawing explanation
Fig. 1 is heat treatment tooling of the present invention and sprinkling system structural representation.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
For reducing the risk of distortion during quenching of large length cylindricality aluminium alloy inner container straight-line segment, the mode that the present invention adopts vertical water entry along its length to quench, is placed on cylinder liner in heat treatment tooling as shown in Figure 1.Heat treatment tooling comprises end breaket 3, balancing weight 4 and frame baffle 5 under cylindricality outside framework 1, inner bag upper end stationary installation 2, inner bag as shown in Figure 1.Wherein, framework 1 is column construction, 4 ~ 6 vertical beam welding of upper and lower two circular end face.Framework 1 bottom disc welds many cross couplings, and for placing removably balancing weight 4, its effect is the floating that the hollow bottle buoyancy of attenuating causes comparatively greatly, improves large volume hollow bottle quenching water-inlet speed, and ensures that quenching water-inlet process is smooth and easy.At framework 1 end breaket 3 under lower end position is welded and fixed inner bag, under inner bag, end breaket 3 center is location annulus, and circle diameter is less than cylindricality inner bag 6 diameter, is greater than inner bag nozzle diameter, and aluminium alloy inner container 6 is vertically placed on bracket 3.Removably inner bag upper end stationary installation 2 is also provided with near upper end position at framework 1, stationary installation 2 two ends iron wire is fixed on the vertical beam at framework 1 edge, and its effect is for vertically fixing inner bag 6 and preventing inner bag 6 run-off the straight or floating in shrend process.
For improving the speed of cooling of inner bag 6 upper end ozzle and end socket, above the present invention have employed in quenching process spray and below the mode that combines of tank quenching carry out quench treatment.After solution treatment, rapidly heat treatment tooling and cylindricality aluminium alloy inner container 6 hung out with crane and be transferred to above quench treatment tank, in transfer process, manually the rapid fixed position, framework 1 upper end 8 that moved to by spray equipment 7 is also fixed, when heat treatment tooling drop to inner bag 6 contact with water time, spray equipment 7 above opening sink water, and rapidly by heat treatment tooling and inner bag 6 submerged.Wherein, spray equipment 7 comprises chilling spray pipeline 12 and the upper end ozzle endoporus water injecting pipeline 13 of inner bag upper end ozzle and end socket, the object arranging the chilling spray pipeline 12 of inner bag upper end ozzle and end socket is the speed of cooling improving inner bag 6 upper end ozzle and end socket, and the object of upper end ozzle endoporus water injecting pipeline 13 is the air velocities of discharge accelerated further in hollow inner bag 6, ensure into water smooth and easy.As shown in Figure 1, the chilling spray pipeline 12 of inner bag upper end ozzle and end socket has two, one end is connected with water pump, the other end for being equipped with bent angle porous nozzle, upper end ozzle endoporus water injecting pipeline 13 is one, one end is also connected with water pump, and the other end is for being equipped with right angle pipe shower nozzle.In addition, the fixed position 8 of sprinkling system comprises chilling spray conduit positions and the ozzle endoporus water injecting pipeline position, upper end of inner bag upper end ozzle and end socket.As shown in Figure 1, the chilling spray pipeline of inner bag upper end ozzle and end socket when spraying direct built at thermal treatment framework 1 nose-circle in the face of on edges at two ends position, upper end ozzle endoporus water injecting pipeline is placed on framework 1 top center when spraying, for fixing this central position, cylindricality outside framework 1 welded top crossbeam, center weld location annulus, annulus height is about 30mm, and its internal diameter and upper end ozzle water injecting pipeline 13 diameter mate with inner bag upper end nozzle diameter.
In addition, for reduction causes bottle straight-line segment mechanical heterogeneity and risk of distortion because spray water splashes, the present invention have also been devised back taper baffle plate in inner bag upper end stationary installation 2, avoids spray water and bottle straight-line segment short contact in quenching process.As shown in Figure 1, inner bag upper end stationary installation 2 comprises inverted-cone shape baffle plate 9, fixed link 10, the thin bed course 11 of fine aluminium.Wherein, inverted-cone shape baffle plate 9 upper/lower terminal is circular open, tapering is about greater than 30 degree, upper limb circumference is slightly less than framework 1 inner circle, and lower than framework 1 upper surface, lower edge is placed in inner bag 6 straight-line segment upper limb position, and the high cylindrical extension of about 10mm is set, fit downwards along inner bag 6 straight-line segment direction, its girth and inner bag 6 straight-line segment upper limb match, and can be fixed on inner bag 6 straight-line segment upper limb by manually fastening clip; In addition, the thin bed course 11 of the thick fine aluminium of about 1mm is laid inside baffle plate extension, fine aluminium fusing point is higher than 6061 aluminum alloy solution temperature, can not melt under solid solubility temperature and come off, and when easily deformable after inner bag 6 and baffle plate 9 expanded by heating, can gap between sealing baffle 9 and inner bag 6 after clip is fastening, when spraying in short-term in avoid spray water to permeate contacting with bottle straight-line segment.
Simultaneously, for avoiding the random splashing tank external region of water in spray process, outside framework 1, also wrapping up cylindrical frame baffle plate 5, and be fixed on framework 1 top, but top and the bottom of frame baffle 5 are not blocked, be convenient to shrend process bottle and fully contact with water.In addition, heat treatment tooling and sprinkling system adopt material, and except the chilling spray pipeline 12 of inverted-cone shape baffle plate 9, inner bag upper end ozzle and end socket and upper end ozzle endoporus water injecting pipeline 13 are stainless material, other fixture components all adopt 45# steel.
Embodiment 1
In the present embodiment, 6061 aluminium alloy inner containers are through aluminium alloy pipe two ends closing in mould pressing, for two ends have little ozzle and ellipsoidal head and between the hollow inner bag of cylindricality straight-line segment, its volume is 130L, total length is 1300mm, internal diameter is Ф 400mm, and wall thickness is 7.6mm, and straight-line segment is 870mm, straight-line segment linearity < 0.5mm, two ends ozzle external diameter is Ф 56mm, diameter of bore is Ф 20mm.Be below the detailed process of heat treating method:
Step (one), 6061 aluminium alloy cylindricality inner bags are fixedly mounted on heat treatment tooling;
Step (two), the large volume inner bag (6) be arranged on heat treatment tooling is put into heat treatment furnace and carries out solution treatment, at 535 ± 5 DEG C of insulation 120min, after being disposed, rapidly heat treatment tooling and cylindricality aluminium alloy inner container (6) hung out and be transferred to above quench treatment tank, in transfer process, manually rapid spray equipment (7) is moved to framework (1) fixed position, upper end (8), when heat treatment tooling drop to inner bag (6) contact with water time, spray equipment (7) above opening sink water is opened, and rapidly by heat treatment tooling and inner bag (6) submerged.Quenching shift time is no more than 60s; .
After step (three), quenching, will process frock and cylindricality aluminium alloy inner container (6) and together put into heat treatment furnace and carry out ageing treatment, be incubated 10h at 165 ± 5 DEG C, air cooling.After being disposed, aluminium alloy inner container is loaded onto dismounting from quencher.
Inner bag (6) bottle mechanical property in the present embodiment after process is as shown in table 1, upper/lower terminal ozzle and neighbouring straight-line segment material mechanical performance all meet design requirement, the linearity < 1.0mm of inner bag (6) straight-line segment, meet design requirement≤1.5mm, ensure that mechanical property and the dimensional precision of product, improve the reliability of composites gas cylinder inner bag.
Table 1130L aluminium alloy inner container bottle mechanical property
The above; be only the embodiment of the best of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
The content be not described in detail in specification sheets of the present invention belongs to the known technology of professional and technical personnel in the field.

Claims (5)

1. the cylindricality aluminium alloy inner container heat treating method of little ozzle, major diameter, big L/D ratio, is characterized in that:
Step (one), had at two ends the cylindricality aluminium alloy inner container of little ozzle to be vertically fixedly mounted on heat treatment tooling, described heat treatment tooling comprises end breaket (3), balancing weight (4) and frame baffle (5) under cylindricality outside framework (1), inner bag upper end stationary installation (2), inner bag; Wherein, at cylindricality outside framework (1) end breaket (3) under lower end position fixes inner bag, and end breaket (3) below base of frame places balancing weight (4) under inner bag, aluminium alloy inner container (6) to be vertically placed under inner bag on end breaket (3), aluminium alloy inner container (6) direct tube section upper end is vertically fixed on cylindricality by stationary installation (2) and expects that frame (1) is near upper end position outward, frame baffle (5) along cylindrical frame circumference parcel, and is fixed on cylindricality outside framework (1) top;
Step (two), the aluminium alloy inner container be vertically mounted on heat treatment tooling (6) is put into heat treatment furnace and carries out solution treatment, after being disposed, heat treatment tooling and cylindricality aluminium alloy inner container (6) are hung out and is transferred to above quench treatment tank, in transfer process, spray equipment (7) is moved to cylindricality outside framework (1) fixed position, upper end (8), when heat treatment tooling drop to inner bag (6) contact with water time, spray equipment (7) above opening sink water, and rapidly by heat treatment tooling and inner bag (6) submerged,
After step (three), quenching, heat treatment tooling and aluminium alloy inner container (6) are together put into heat treatment furnace and carries out ageing treatment, after being disposed, aluminium alloy inner container (6) is dismantled from heat treatment tooling.
2. the cylindricality aluminium alloy inner container heat treating method of little ozzle according to claim 1, major diameter, big L/D ratio, it is characterized in that: cylindricality outside framework (1) top center of described heat treatment tooling arranges location annulus, annulus height is less than aluminium alloy inner container (6) ozzle height, and diameter mates with inner bag upper end nozzle diameter.
3. the cylindricality aluminium alloy inner container heat treating method of little ozzle according to claim 1, major diameter, big L/D ratio, is characterized in that: inner bag upper end stationary installation (2) of described heat treatment tooling comprises inverted-cone shape baffle plate (9), fixed link (10), the thin bed course of fine aluminium (11), wherein, inverted-cone shape baffle plate (9) lower edge is the cylindrical extension that 10 ~ 15mm is high, fit along inner bag (6) straight-line segment direction, and its girth and inner bag (6) straight-line segment upper limb match, and be fixed on inner bag (6) straight-line segment upper limb by clip, the thin bed course of fine aluminium (11) is laid inside inverted-cone shape baffle plate (9) extension, inverted-cone shape baffle plate (9) outside is symmetrically welded two fixed links (10), fixed link (10) free end is fixed on cylindricality outside framework (1) edge, inverted-cone shape baffle plate (9) upper limb circumference is less than framework (1) inner circle, and lower than framework (1) upper surface.
4. the cylindricality aluminium alloy inner container heat treating method of little ozzle according to claim 1, major diameter, big L/D ratio, is characterized in that: under the inner bag of described heat treatment tooling, end breaket (3) comprises a location annulus and two fixed links; Location annulus is as the center of end breaket under inner bag, and setting circle ring diameter is less than cylindricality inner bag (6) diameter, is greater than inner bag nozzle diameter, is welded on framework (1) edge outside the outer toroid of top with fixed link.
5. the cylindricality aluminium alloy inner container heat treating method of little ozzle according to claim 1, major diameter, big L/D ratio, is characterized in that: described spray equipment (7) comprises chilling spray pipeline (12) and upper end ozzle endoporus water injecting pipeline (13) of inner bag upper end ozzle and end socket; Wherein, inner bag upper end ozzle is connected with water pump with chilling spray pipeline (12) one end of end socket, the other end is equipped with bent angle porous nozzle, ozzle endoporus water injecting pipeline (13) one end, upper end is also connected with water pump, the other end is equipped with right angle pipe shower nozzle, and upper end ozzle endoporus water injecting pipeline (13) pipe diameter is less than framework (1) top center setting circle ring diameter.
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Cited By (7)

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CN107570972A (en) * 2017-09-22 2018-01-12 航天材料及工艺研究所 The manufacturing process of large-scale high mode spheroid shape face Aluminum alloys tank Loadings On Hemispherical Shell
CN107723636A (en) * 2017-10-29 2018-02-23 航天材料及工艺研究所 A kind of thermomechanical treatment process for improving high-intensity thermal deformation resistant magnesium alloy cylindrical member performance
CN108555543A (en) * 2018-05-11 2018-09-21 航天材料及工艺研究所 A kind of manufacturing process of Aluminum alloys tank Loadings On Hemispherical Shell
CN108637602A (en) * 2018-05-11 2018-10-12 航天材料及工艺研究所 A kind of large size, thin walled Aluminum alloys tank Loadings On Hemispherical Shell manufacturing process
CN112251585A (en) * 2020-09-30 2021-01-22 中材科技(成都)有限公司 Thin-wall aluminum alloy gas cylinder liner solid solution frame and framing method thereof
CN113667804A (en) * 2021-08-23 2021-11-19 湖南云箭集团有限公司 Device for delaying cooling speed of steel shell after heat treatment and using method thereof
CN114062038A (en) * 2020-07-31 2022-02-18 力合科技(湖南)股份有限公司 Pollution tracing management and control method

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CN107570972A (en) * 2017-09-22 2018-01-12 航天材料及工艺研究所 The manufacturing process of large-scale high mode spheroid shape face Aluminum alloys tank Loadings On Hemispherical Shell
CN107723636A (en) * 2017-10-29 2018-02-23 航天材料及工艺研究所 A kind of thermomechanical treatment process for improving high-intensity thermal deformation resistant magnesium alloy cylindrical member performance
CN108555543A (en) * 2018-05-11 2018-09-21 航天材料及工艺研究所 A kind of manufacturing process of Aluminum alloys tank Loadings On Hemispherical Shell
CN108637602A (en) * 2018-05-11 2018-10-12 航天材料及工艺研究所 A kind of large size, thin walled Aluminum alloys tank Loadings On Hemispherical Shell manufacturing process
CN114062038A (en) * 2020-07-31 2022-02-18 力合科技(湖南)股份有限公司 Pollution tracing management and control method
CN112251585A (en) * 2020-09-30 2021-01-22 中材科技(成都)有限公司 Thin-wall aluminum alloy gas cylinder liner solid solution frame and framing method thereof
CN113667804A (en) * 2021-08-23 2021-11-19 湖南云箭集团有限公司 Device for delaying cooling speed of steel shell after heat treatment and using method thereof

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