CN107964640A - A kind of rolling screen door locating support - Google Patents
A kind of rolling screen door locating support Download PDFInfo
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- CN107964640A CN107964640A CN201711216896.7A CN201711216896A CN107964640A CN 107964640 A CN107964640 A CN 107964640A CN 201711216896 A CN201711216896 A CN 201711216896A CN 107964640 A CN107964640 A CN 107964640A
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- Prior art keywords
- screen door
- rolling screen
- locating support
- door locating
- powder
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-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/04—Light metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
- E06B9/08—Roll-type closures
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F2003/145—Both compacting and sintering simultaneously by warm compacting, below debindering temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
- B22F2003/208—Warm or hot extruding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Abstract
The present invention relates to a kind of stent, and in particular to a kind of rolling screen door locating support, belongs to field of alloy material.Rolling screen door locating support of the present invention is made of magnesium alloy, and the magnesium alloy specifically includes the component of following mass percent：Al：7.5 8.0%, Zn：0.55 0.65%, Mn：0.15 0.25%, Si：0.05 0.1%, La：0.5 0.8%, Nd：0.8 1.2%, NiTi long fibre：0.6 0.85%, surplus Mg；The Mg alloy surface expands the Al Zn film layers for being impregnated with that thickness is 1.0 1.2mm.Al Zn film layers are made by surface diffusion penetration in Mg alloy surface in the present invention, form stable surface alloying layer AlMg2The diffusion layer that Zn is collectively constituted with Mg Al Zn solid solution layers, so as to play the role of to rolling screen door locating support of the present invention anti-corrosion.
Description
Invention field
The present invention relates to a kind of stent, and in particular to a kind of rolling screen door locating support, belongs to field of alloy material.
Background technology
Rolling screen door equally plays horizontal subdivision with the effect of wall, it is by curtain plate, seat board, guide rail, bearing, spool, babinet, control
Case, door roller, limiter, lintel and manual speed processed put switching device etc. parts composition, rolling screen door its off and on operation letter
Just, relative to common iron gate structure is made, it has the advantages that the low and easy installation of cost to folk prescription, continuous with living standard
Improve and various rolling screen door occur in the continuous development of social technology, existing in the market, it has obtained widely should
With；For example, for public place or houses such as the business shop front, garage, market, hospital, industrial enterprise.Especially door opening is larger,
Convenient, fast unlatching etc. is played the role of in the place of inconvenience installation ground door body, and rolling screen door is the door piece string with multi-joint activity
It is linked togather, in fixed slideway, upper and lower door is rotated centered on spool above door.The limiter of existing rolling screen door is general
It is to be fixed by locating support, its complicated manufacture cost of existing locating support is higher, in addition, determining when limiter is installed to
After on the stent of position, it adjusts inconvenient.
The content of the invention
The present invention is in view of the above-mentioned problems existing in the prior art, it is proposed that a kind of rolling screen door locating support of high intensity.
The purpose of the present invention can be realized by following technical solution：A kind of rolling screen door locating support of high intensity, it is described
Rolling screen door locating support is made of magnesium alloy, and the magnesium alloy specifically includes the component of following mass percent：Al：7.5-
8.0%, Zn：0.55-0.65%, Mn：0.15-0.25%, Si：0.05-0.1%, La：0.5-0.8%, Nd：0.8-1.2%,
NiTi long fibres：0.6-0.85%, surplus Mg；The Mg alloy surface expands the Al-Zn films for being impregnated with that thickness is 1.0-1.2mm
Layer.
Rolling screen door locating support of the present invention is closed by adding NiTi long fibres, NiTi long fibres in magnesium alloy component with magnesium
Make a clear distinction between good and evil between auri body, the defects of without hole, gap etc, also without interfacial reaction products and interfacial reaction layer, because
Any reaction does not occur with magnesium alloy substrate in this, has remarkable effect for the hardness for improving magnesium alloy substrate.
Meanwhile Al-Zn film layers are made by surface diffusion penetration in Mg alloy surface in the present invention, can make Al-Zn film layers
The fine and closely woven infiltration layer of even tissue is formed between magnesium alloy substrate, while forms stable surface alloying layer AlMg2Zn and Mg-
The diffusion layer that Al-Zn solid solution layers collectively constitute, so as to play the role of to rolling screen door locating support of the present invention anti-corrosion.
In rolling screen door locating support of the present invention, Al elements have larger solid solubility in solid-state magnesium, can improve pressure magnesium
The Castability of alloy, so that the intensity of magnesium alloy is improved, and Al constituent contents are higher in magnesium alloy, then corrosion resisting property is better；
But Al constituent contents are excessive, the increase of stress moisture-proof sensitiveness, is unfavorable for the manufacture of finished product, therefore the present invention is using mentioned component
Al content.
In a kind of above-mentioned rolling screen door locating support, a certain amount of Zn is also added into.The addition of Zn, can improve magnesium alloy
Creep resisting ability, so as to improve the sensitiveness of stress corrosion, meanwhile, add suitable Zn in the magnesium alloy, can substantially carry
The fatigue limit of high magnesium alloy.
In addition, in rolling screen door locating support of the present invention, a small amount of Mn elements are also added into.The addition of Mn elements, can carry
The stress corrosion resistant tendency of high magnesium alloy, so as to improve corrosion resistance and improve the welding performance of alloy；Simultaneously as magnesium closes
Gold brings more Impurity Fe into smelting process, and MgFeMn can be formed by adding Mg, so as to remove the influence of Fe elements, be carried
The heat resistance of high magnesium alloy.
Secondly, Si is added in rolling screen door locating support of the present invention, the precipitated phase of small and dispersed can be formed in grain boundaries
Mg2Si, it has CaF2Type face-centered cubic crystal structure, there is higher fusing point and hardness, so as to strengthen the heat endurance of magnesium alloy
Energy and creep-resistant property.
In rolling screen door locating support of the present invention, by compound addition La and Nd, it can separate out in the alloy needle-shaped
Al11La3With block Al2Nd, and the rare earth formed compares small disperse, can not only mitigate rare-earth phase, and two separated out at the same time
The rare-earth phase of kind different-shape so that they are not easy accumulation and grow up, and are not easy to cause stress concentration, therefore can strengthen the strong of magnesium alloy
Tough effect.Preferably, the mass percent of La+Nd of the present invention is 1.5-1.7%.
It is another object of the present invention to provide a kind of preparation method of above-mentioned rolling screen door locating support, the preparation side
Method includes the following steps：
Ball powder-grinding：Weigh except the raw material magnesium alloy of the long stapled preparation rolling screen door locating supports of NiTi is fitted into ball mill
Ball milling is carried out under Ar gas and obtains powder；
Hot pressing base：Powder and NiTi long fibres are hot pressed into prefabricated blank in individual event compacting tool set；
Sintering：Prefabricated blank is sintered in Ar gas shieldeds, temperature is 550-600 DEG C, sintering time 1-2h；
Hot extrusion：By prefabricated blank temperature be 360-380 DEG C, extrusion ratio 16-18:Extrusion forming must close under conditions of 1
Alloy components are finally obtained rolling screen door locating support semi-finished product by golden part after cutting, machining；
Surface, which is expanded, oozes Al-Zn layers：Rolling screen door locating support semi-finished product are embedded in Al-Zn penetration enhancers, and 470-480 DEG C into
Row expansion is oozed, time 2-3h.
In a kind of above-mentioned preparation method of rolling screen door locating support, stearic acid is also added into mechanical milling process, it is stearic
The addition of acid is the 1.2-1.4% of raw material magnesium alloy quality.Wherein, stearic acid is added as process control agent, can be in ball milling
When, surface of metal particles is coated one layer of organic film, the direct contact between powder particle can be hindered, on the one hand play lubrication
Effect, effectively reduce the mutual abrasion between abrading-ball, between abrading-ball and ball mill, on the other hand, stearic cladding energy
The surface energy of metallic particles is significantly reduced, so that flour extraction greatly improves, also prevent powder adhesion.
In a kind of above-mentioned preparation method of rolling screen door locating support, the ball mill is planetary ball mill, and ball milling turns
Speed is 420-430r/min, Ball-milling Time 11-13h.The shape of particle has notable shadow during the entire process of powder metallurgy
Ring.The higher mobility of particle of roundness is preferable, and die cavity is easily filled in pressing process, makes the Density Distribution of pressed compact uniform,
And sheet, strip easily produce " bridging " phenomenon when the powder particle of shape is in compacting, a large amount of gaps, therefore the present invention are left
Select above-mentioned rotating speed and Ball-milling Time.
In a kind of above-mentioned preparation method of rolling screen door locating support, the hot pressing specifically comprises the following steps：It is warming up to
200-220 DEG C of insulation 0.5-0.7h, then 240-250 DEG C is warming up to, 0.5-0.8h is kept the temperature, the pressure of hot pressing is 370-
380MPa。
In a kind of above-mentioned preparation method of rolling screen door locating support, the Al-Zn penetration enhancers are mixed by pure Al powder and pure Zn powder
Conjunction forms, and portion rate is 1-1.1:1.Preferably, the granularity of the pure Al powder and pure Zn powder is 280-300 mesh.
In a kind of above-mentioned preparation method of rolling screen door locating support, the rolling screen door locating support semi-finished product expand on surface
Need, by pretreatment, to specifically comprise the following steps before oozing：By rolling screen door locating support semi-finished product through varigrained sand paper progressively
Polishing is placed on cleaning, drying in acetone soln.
Compared with prior art, the invention has the advantages that：
1st, Al-Zn film layers are made by surface diffusion penetration in Mg alloy surface in the present invention, can make Al-Zn film layers and magnesium
The fine and closely woven infiltration layer of even tissue is formed between alloy substrate, while forms stable surface alloying layer AlMg2Zn and Mg-Al-Zn
The diffusion layer that solid solution layer collectively constitutes, so as to play the role of to rolling screen door locating support of the present invention anti-corrosion；
2nd, rolling screen door locating support of the present invention in magnesium alloy component by adding NiTi long fibres, NiTi long fibres and magnesium
Make a clear distinction between good and evil between alloy substrate, the defects of without hole, gap etc, also without interfacial reaction products and interfacial reaction layer,
Therefore any reaction does not occur with magnesium alloy substrate, there is remarkable effect for the hardness for improving magnesium alloy substrate；
3rd, rolling screen door locating support of the present invention selects the rational magnesium alloy materials of compatibility, and uses specific method, can
The rolling screen door locating support made has high intensity and hardness.
Embodiment
It is the embodiment of the present invention below, technical scheme is further described, but the present invention
It is not limited to these embodiments.
Embodiment 1
Ball powder-grinding：Weigh except the raw material magnesium alloy of the long stapled preparation rolling screen door locating supports of NiTi is fitted into ball mill
Ball milling is carried out under Ar gas and obtains powder；Wherein, magnesium alloy specifically includes the component of following mass percent：Al：7.5-8.0%,
Zn：0.55-0.65%, Mn：0.15-0.25%, Si：0.05-0.1%, La：0.5-0.8%, Nd：0.8-1.2%, NiTi long
Fiber：0.6-0.85%, surplus Mg；Stearic acid is also added into mechanical milling process, stearic addition is former for magnesium alloy
Expect the 1.2-1.4% of quality；The ball mill is planetary ball mill, rotational speed of ball-mill 420-430r/min, and Ball-milling Time is
11-13h；
Hot pressing base：Powder and NiTi long fibres are hot pressed into prefabricated blank in individual event compacting tool set；The hot pressing is specific
Include the following steps：200-220 DEG C of insulation 0.5-0.7h is warming up to, then is warming up to 240-250 DEG C, keeps the temperature 0.5-0.8h, hot pressing
The pressure of process is 370-380MPa；
Sintering：Prefabricated blank is sintered in Ar gas shieldeds, temperature is 550-600 DEG C, sintering time 1-2h；
Hot extrusion：By prefabricated blank temperature be 360-380 DEG C, extrusion ratio 16-18:Extrusion forming must close under conditions of 1
Alloy components are finally obtained rolling screen door locating support semi-finished product by golden part after cutting, machining；
Surface, which is expanded, oozes Al-Zn layers：Rolling screen door locating support semi-finished product are embedded in Al-Zn penetration enhancers, and 470-480 DEG C into
Row expansion is oozed, time 2-3h；The Al-Zn penetration enhancers are mixed by pure Al powder and pure Zn powder, and portion rate is 1-1.1:1；Institute
The granularity for stating pure Al powder and pure Zn powder is 280-300 mesh；The rolling screen door locating support semi-finished product surface expand ooze before need by
Pretreatment, specifically comprises the following steps：Rolling screen door locating support semi-finished product are progressively polished through varigrained sand paper and are placed on
Cleaning, drying in acetone soln.
Embodiment 2
Ball powder-grinding：Weigh except the raw material magnesium alloy of the long stapled preparation rolling screen door locating supports of NiTi is fitted into ball mill
Ball milling is carried out under Ar gas and obtains powder；Wherein, magnesium alloy specifically includes the component of following mass percent：Al：7.5-8.0%,
Zn：0.55-0.65%, Mn：0.15-0.25%, Si：0.05-0.1%, La：0.5-0.8%, Nd：0.8-1.2%, NiTi long
Fiber：0.6-0.85%, surplus Mg；Stearic acid is also added into mechanical milling process, stearic addition is former for magnesium alloy
Expect the 1.2-1.4% of quality；The ball mill is planetary ball mill, rotational speed of ball-mill 420-430r/min, and Ball-milling Time is
11-13h；
Hot pressing base：Powder and NiTi long fibres are hot pressed into prefabricated blank in individual event compacting tool set；The hot pressing is specific
Include the following steps：200-220 DEG C of insulation 0.5-0.7h is warming up to, then is warming up to 240-250 DEG C, keeps the temperature 0.5-0.8h, hot pressing
The pressure of process is 370-380MPa；
Sintering：Prefabricated blank is sintered in Ar gas shieldeds, temperature is 550-600 DEG C, sintering time 1-2h；
Hot extrusion：By prefabricated blank temperature be 360-380 DEG C, extrusion ratio 16-18:Extrusion forming must close under conditions of 1
Alloy components are finally obtained rolling screen door locating support semi-finished product by golden part after cutting, machining；
Surface, which is expanded, oozes Al-Zn layers：Rolling screen door locating support semi-finished product are embedded in Al-Zn penetration enhancers, and 470-480 DEG C into
Row expansion is oozed, time 2-3h；The Al-Zn penetration enhancers are mixed by pure Al powder and pure Zn powder, and portion rate is 1-1.1:1；Institute
The granularity for stating pure Al powder and pure Zn powder is 280-300 mesh；The rolling screen door locating support semi-finished product surface expand ooze before need by
Pretreatment, specifically comprises the following steps：Rolling screen door locating support semi-finished product are progressively polished through varigrained sand paper and are placed on
Cleaning, drying in acetone soln.
Embodiment 3
Ball powder-grinding：Weigh except the raw material magnesium alloy of the long stapled preparation rolling screen door locating supports of NiTi is fitted into ball mill
Ball milling is carried out under Ar gas and obtains powder；Wherein, magnesium alloy specifically includes the component of following mass percent：Al：7.5-8.0%,
Zn：0.55-0.65%, Mn：0.15-0.25%, Si：0.05-0.1%, La：0.5-0.8%, Nd：0.8-1.2%, NiTi long
Fiber：0.6-0.85%, surplus Mg；Stearic acid is also added into mechanical milling process, stearic addition is former for magnesium alloy
Expect the 1.2-1.4% of quality；The ball mill is planetary ball mill, rotational speed of ball-mill 420-430r/min, and Ball-milling Time is
11-13h；
Hot pressing base：Powder and NiTi long fibres are hot pressed into prefabricated blank in individual event compacting tool set；The hot pressing is specific
Include the following steps：200-220 DEG C of insulation 0.5-0.7h is warming up to, then is warming up to 240-250 DEG C, keeps the temperature 0.5-0.8h, hot pressing
The pressure of process is 370-380MPa；
Sintering：Prefabricated blank is sintered in Ar gas shieldeds, temperature is 550-600 DEG C, sintering time 1-2h；
Hot extrusion：By prefabricated blank temperature be 360-380 DEG C, extrusion ratio 16-18:Extrusion forming must close under conditions of 1
Alloy components are finally obtained rolling screen door locating support semi-finished product by golden part after cutting, machining；
Surface, which is expanded, oozes Al-Zn layers：Rolling screen door locating support semi-finished product are embedded in Al-Zn penetration enhancers, and 470-480 DEG C into
Row expansion is oozed, time 2-3h；The Al-Zn penetration enhancers are mixed by pure Al powder and pure Zn powder, and portion rate is 1-1.1:1；Institute
The granularity for stating pure Al powder and pure Zn powder is 280-300 mesh；The rolling screen door locating support semi-finished product surface expand ooze before need by
Pretreatment, specifically comprises the following steps：Rolling screen door locating support semi-finished product are progressively polished through varigrained sand paper and are placed on
Cleaning, drying in acetone soln.
Embodiment 4
Ball powder-grinding：Weigh except the raw material magnesium alloy of the long stapled preparation rolling screen door locating supports of NiTi is fitted into ball mill
Ball milling is carried out under Ar gas and obtains powder；Wherein, magnesium alloy specifically includes the component of following mass percent：Al：7.5-8.0%,
Zn：0.55-0.65%, Mn：0.15-0.25%, Si：0.05-0.1%, La：0.5-0.8%, Nd：0.8-1.2%, NiTi long
Fiber：0.6-0.85%, surplus Mg；Stearic acid is also added into mechanical milling process, stearic addition is former for magnesium alloy
Expect the 1.2-1.4% of quality；The ball mill is planetary ball mill, rotational speed of ball-mill 420-430r/min, and Ball-milling Time is
11-13h；
Hot pressing base：Powder and NiTi long fibres are hot pressed into prefabricated blank in individual event compacting tool set；The hot pressing is specific
Include the following steps：200-220 DEG C of insulation 0.5-0.7h is warming up to, then is warming up to 240-250 DEG C, keeps the temperature 0.5-0.8h, hot pressing
The pressure of process is 370-380MPa；
Sintering：Prefabricated blank is sintered in Ar gas shieldeds, temperature is 550-600 DEG C, sintering time 1-2h；
Hot extrusion：By prefabricated blank temperature be 360-380 DEG C, extrusion ratio 16-18:Extrusion forming must close under conditions of 1
Alloy components are finally obtained rolling screen door locating support semi-finished product by golden part after cutting, machining；
Surface, which is expanded, oozes Al-Zn layers：Rolling screen door locating support semi-finished product are embedded in Al-Zn penetration enhancers, and 470-480 DEG C into
Row expansion is oozed, time 2-3h；The Al-Zn penetration enhancers are mixed by pure Al powder and pure Zn powder, and portion rate is 1-1.1:1；Institute
The granularity for stating pure Al powder and pure Zn powder is 280-300 mesh；The rolling screen door locating support semi-finished product surface expand ooze before need by
Pretreatment, specifically comprises the following steps：Rolling screen door locating support semi-finished product are progressively polished through varigrained sand paper and are placed on
Cleaning, drying in acetone soln.Embodiment 5
Ball powder-grinding：Weigh except the raw material magnesium alloy of the long stapled preparation rolling screen door locating supports of NiTi is fitted into ball mill
Ball milling is carried out under Ar gas and obtains powder；Wherein, magnesium alloy specifically includes the component of following mass percent：Al：7.5-8.0%,
Zn：0.55-0.65%, Mn：0.15-0.25%, Si：0.05-0.1%, La：0.5-0.8%, Nd：0.8-1.2%, NiTi long
Fiber：0.6-0.85%, surplus Mg；Stearic acid is also added into mechanical milling process, stearic addition is former for magnesium alloy
Expect the 1.2-1.4% of quality；The ball mill is planetary ball mill, rotational speed of ball-mill 420-430r/min, and Ball-milling Time is
11-13h；
Hot pressing base：Powder and NiTi long fibres are hot pressed into prefabricated blank in individual event compacting tool set；The hot pressing is specific
Include the following steps：200-220 DEG C of insulation 0.5-0.7h is warming up to, then is warming up to 240-250 DEG C, keeps the temperature 0.5-0.8h, hot pressing
The pressure of process is 370-380MPa；
Sintering：Prefabricated blank is sintered in Ar gas shieldeds, temperature is 550-600 DEG C, sintering time 1-2h；
Hot extrusion：By prefabricated blank temperature be 360-380 DEG C, extrusion ratio 16-18:Extrusion forming must close under conditions of 1
Alloy components are finally obtained rolling screen door locating support semi-finished product by golden part after cutting, machining；
Surface, which is expanded, oozes Al-Zn layers：Rolling screen door locating support semi-finished product are embedded in Al-Zn penetration enhancers, and 470-480 DEG C into
Row expansion is oozed, time 2-3h；The Al-Zn penetration enhancers are mixed by pure Al powder and pure Zn powder, and portion rate is 1-1.1:1；Institute
The granularity for stating pure Al powder and pure Zn powder is 280-300 mesh；The rolling screen door locating support semi-finished product surface expand ooze before need by
Pretreatment, specifically comprises the following steps：Rolling screen door locating support semi-finished product are progressively polished through varigrained sand paper and are placed on
Cleaning, drying in acetone soln.
Embodiment 6
With differing only in for embodiment 1, common hot pressing work is used in the embodiment rolling screen door locating support preparation process
Skill, other are same as Example 1, and details are not described herein again.
Embodiment 7
With differing only in for embodiment 1, expand in the embodiment rolling screen door locating support preparation process before oozing and do not pass through
Pretreatment, other are identical with embodiment, and details are not described herein again.
Comparative example 1
With differing only in for embodiment 1, the magnesium alloy of the comparative example rolling screen door locating support is closed using common commercially available magnesium
Gold, other are same as Example 1, and details are not described herein again.
Comparative example 2
With differing only in for embodiment 1, the Mg alloy surface of the comparative example rolling screen door locating support does not coat Al-Zn
Film layer, other are same as Example 1, and details are not described herein again.
Comparative example 3
With differing only in for embodiment 1, the group of magnesium alloys of the comparative example rolling screen door locating support is in without NiTi long
Fiber, other are same as Example 1, and details are not described herein again.
Comparative example 4
With differing only in for embodiment 1, the group of magnesium alloys of the comparative example rolling screen door locating support does not have La elements in,
Other are same as Example 1, and details are not described herein again.
Comparative example 5
With differing only in for embodiment 1, the group of magnesium alloys of the comparative example rolling screen door locating support does not have Nd elements in,
Other are same as Example 1, and details are not described herein again.
Rolling screen door locating support in embodiment 1-7 and comparative example 1-5 is subjected to performance detection, the testing result such as institute of table 1
Show.
Table 1：Rolling screen door locating support test result in embodiment 1-7 and comparative example 1-5
It can be seen from the results above that rolling screen door locating support of the present invention is fine by adding NiTi long in magnesium alloy component
Dimension, makes a clear distinction between good and evil between NiTi long fibres and magnesium alloy substrate, the defects of without hole, gap etc, also without interfacial reaction
Product and interfacial reaction layer, therefore any reaction does not occur with magnesium alloy substrate, the hardness for improving magnesium alloy substrate
With remarkable effect；Meanwhile rolling screen door locating support of the present invention selects the rational magnesium alloy materials of compatibility, and using specific side
Method, the rolling screen door locating support enabled to have high intensity and hardness.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can do various modifications or supplement to described specific embodiment or substitute in a similar way, but simultaneously
The spirit or beyond the scope of the appended claims of the present invention is not deviated by.
It is skilled to this area although having been made a detailed description to the present invention and being cited some specific embodiments
For technical staff, as long as it is obvious that can make various changes or correct without departing from the spirit and scope of the present invention.
Claims (9)
1. a kind of rolling screen door locating support, it is characterised in that the rolling screen door locating support is made of magnesium alloy, the magnesium alloy
Specifically include the component of following mass percent：Al：7.5-8.0%, Zn：0.55-0.65%, Mn：0.15-0.25%, Si：
0.05-0.1%, La：0.5-0.8%, Nd：0.8-1.2%, NiTi long fibre：0.6-0.85%, surplus Mg；The magnesium closes
Gold surface expands the Al-Zn film layers for being impregnated with that thickness is 1.0-1.2mm.
2. a kind of rolling screen door locating support according to claim 1, it is characterised in that the mass percent of La+Nd is
1.5-1.7%.
A kind of 3. preparation method of rolling screen door locating support as claimed in claim 1, it is characterised in that the preparation method bag
Include following steps：
Ball powder-grinding：Weigh except the raw material magnesium alloy of the long stapled preparation rolling screen door locating supports of NiTi is fitted into ball mill in Ar
Ball milling is carried out under gas and obtains powder；
Hot pressing base：Powder and NiTi long fibres are hot pressed into prefabricated blank in individual event compacting tool set；
Sintering：Prefabricated blank is sintered in Ar gas shieldeds, temperature is 550-600 DEG C, sintering time 1-2h；
Hot extrusion：By prefabricated blank temperature be 360-380 DEG C, extrusion ratio 16-18:Extrusion forming obtains alloy components under conditions of 1,
Alloy components are finally obtained into rolling screen door locating support semi-finished product after cutting, machining；
Surface, which is expanded, oozes Al-Zn layers：Rolling screen door locating support semi-finished product are embedded in Al-Zn penetration enhancers, and are expanded at 470-480 DEG C
Ooze, time 2-3h.
4. the preparation method of a kind of rolling screen door locating support according to claim 3, it is characterised in that in mechanical milling process
Stearic acid is also added into, stearic addition is the 1.2-1.4% of raw material magnesium alloy quality.
5. the preparation method of a kind of rolling screen door locating support according to claim 3, it is characterised in that the ball mill is
Planetary ball mill, rotational speed of ball-mill 420-430r/min, Ball-milling Time 11-13h.
6. the preparation method of a kind of rolling screen door locating support according to claim 3, it is characterised in that the hot pressing is specific
Include the following steps：200-220 DEG C of insulation 0.5-0.7h is warming up to, then is warming up to 240-250 DEG C, keeps the temperature 0.5-0.8h, hot pressing
The pressure of process is 370-380MPa.
7. the preparation method of a kind of rolling screen door locating support according to claim 3, it is characterised in that the Al-Zn oozes
Agent is mixed by pure Al powder and pure Zn powder, and portion rate is 1-1.1:1.
A kind of 8. preparation method of rolling screen door locating support according to claim 7, it is characterised in that the pure Al powder and
The granularity of pure Zn powder is 280-300 mesh.
9. the preparation method of a kind of rolling screen door locating support according to claim 3, it is characterised in that the rolling screen door is determined
Position stent semi-finished product need, by pretreatment, to specifically comprise the following steps before surface expansion is oozed：By rolling screen door locating support semi-finished product
Progressively polish through varigrained sand paper and be placed on cleaning, drying in acetone soln.
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| CN201711216896.7A CN107964640A (en) | 2017-11-28 | 2017-11-28 | A kind of rolling screen door locating support |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| AT521500A4 (en) * | 2018-12-18 | 2020-02-15 | Lkr Leichtmetallkompetenzzentrum Ranshofen Gmbh | Process for increasing corrosion resistance of a component formed with a magnesium-based alloy against galvanic corrosion and also a corrosion-resistant component obtainable with it |
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Application publication date: 20180427 |