CN109402543A - A kind of titanium-aluminium alloy bar sheathed extrusion preparation method - Google Patents

A kind of titanium-aluminium alloy bar sheathed extrusion preparation method Download PDF

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CN109402543A
CN109402543A CN201811526144.5A CN201811526144A CN109402543A CN 109402543 A CN109402543 A CN 109402543A CN 201811526144 A CN201811526144 A CN 201811526144A CN 109402543 A CN109402543 A CN 109402543A
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titanium
aluminium alloy
extrusion
ingot casting
cover
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CN201811526144.5A
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Chinese (zh)
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CN109402543B (en
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薛祥义
焦勇
周中波
张利军
白钰
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西安西工大超晶科技发展有限责任公司
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18High-melting or refractory metals or alloys based thereon
    • C22F1/183High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon

Abstract

A kind of titanium-aluminium alloy bar sheathed extrusion preparation method cuts off titanium-aluminium alloy ingot casting head, tail, then by ingot casting surface and head, breech face vehicle light, will be put into jacket after titanium-aluminium alloy ingot casting package with high silicon oxygen cloth, obtains sheathed extrusion blank;It will be put into after snearing is uniform in glass protecting lubricant, squeezed after sheathed extrusion blank heating, cooled down, obtain titanium-aluminium alloy bar after removing jacket.Due to heating temperature height, it squeezes lubriation material and is difficult the so high temperature of tolerance, lubriation material glass protecting lubricant is rolled smearing by the present invention after heating, guarantee the lubricant effect in extrusion process, in addition also cool down to sheath material, so that the resistance of deformation of sheath material and titanium-aluminium alloy is consistent, guarantee that subsequent extrusion process is gone on smoothly.Titanium-aluminium alloy ingot casting is wrapped among sheath material, and by the effect of compression in extrusion process used for forming, this stress state can give full play to the plasticity of material, inhibits the generation of crackle.

Description

A kind of titanium-aluminium alloy bar sheathed extrusion preparation method

Technical field

The invention belongs to alloy material and its preparation technical fields, and in particular to a kind of titanium-aluminium alloy bar sheathed extrusion system Preparation Method.

Background technique

Titanium-aluminium alloy belongs to intermetallic compound, due to metallic bond between the long-range order and atom of its atom and covalently The compossibility of key makes it possible to the elevated temperature strength of the plasticity for having metal concurrently and ceramics.The elasticity modulus of titanium-aluminium alloy, creep resistance Energy is equal suitable with the nickel base superalloy that current aerospace engine largely uses, and the density of titanium-aluminium alloy is only Ni-based height The half of temperature alloy is even lower, and it is expected to reach 900 DEG C using temperature.Titanium-aluminium alloy is 650 DEG C~1000 DEG C best Candidate material, be expected to the system in high-temperature components such as aero-engine, airspace engine, superelevation velocity of sound aircraft casing, aerofoils It makes field and obtains engineer application, partly or entirely the current high density largely used of substitution is Ni-based, iron-based, cobalt base superalloy Material.Due to these advantages of titanium-aluminium alloy, pay much attention to it in material in aerospace engine.

But titanium-aluminium alloy is a kind of ordered intermetallic compound, and it is i.e. essential to have the characteristics of ordered intermetallic compound Brittleness, essential brittleness determine that the temperature-room type plasticity of titanium-aluminium alloy and fracture toughness are very low, and room temperature tensile elongation percentage is less than 1% It can be broken.It since essential brittleness causes its hot-working character excessively poor, easily cracks, so the thermo forming of titanium-aluminium alloy is difficult Degree is very big, has become the major technology bottleneck problem for restricting titanium-aluminium alloy engineering Application Research and popularization and application at present, to Titanium-aluminium alloy obtains engineering application, first has to solve the problem of Cracking in its hot procedure.

Summary of the invention

Aiming at the problem that cracking in existing titanium-aluminium alloy hot procedure, the purpose of the present invention is to provide a kind of conjunctions of titanium aluminium Golden bar sheathed extrusion preparation method carries out hot-working to titanium-aluminium alloy ingot casting convenient for economic.

To achieve the above object, the present invention adopts the following technical scheme that:

A kind of titanium-aluminium alloy bar sheathed extrusion preparation method, comprising the following steps:

Step 1: titanium-aluminium alloy ingot casting is prepared using vacuum consumable arc-melting method;

Step 2: cutting off 100~150mm for the titanium-aluminium alloy ingot casting head of step 1 preparation, tail, then by ingot casting surface and Head, breech face vehicle light, surface roughness≤1.6 μm;The macrostructure of ingot casting end face end to end is radial arborescent structure and without splitting Line;

Step 3: being put into jacket after being wrapped up the titanium-aluminium alloy ingot casting 6 in step 2 with high silicon oxygen cloth, obtains jacket and squeezes Green compact material;

Step 4: sheathed extrusion blank being put into heating furnace and is heated, and heating temperature is 1300~1400 DEG C, and heat preservation 4~ 5h;

Step 5: after heat preservation, sheathed extrusion blank being put into glass protecting lubricant and is rolled 2~3 times, blank table It after surface glass protecting lubricant snearing is uniform, is squeezed, is cooled down after extruding, obtain titanium-aluminium alloy stick after then removing jacket Material.

A further improvement of the present invention lies in that in step 1, melting number is that three times, when third time melting is cooling by crucible At 40~45 DEG C, ingot casting cooling time is 1~1.5h for water temperature control, and ingot casting is wrapped up after coming out of the stove with heat-preservation cotton, slow cooling to room temperature.

A further improvement of the present invention lies in that in step 2, if the macrostructure of ingot casting end face end to end be unsatisfactory for it is radial The condition of arborescent structure and flawless then carries out excision until meeting condition.

A further improvement of the present invention lies in that in step 3, high silicon oxygen cloth with a thickness of 0.5~1mm.

A further improvement of the present invention lies in that sheathed extrusion charge length is 300~400mm in step 3.

A further improvement of the present invention lies in that jacket includes cylinder, top cover and bottom cover in step 3, top cover is arranged in cylinder At the top of body, bottom cover is arranged in cylinder body bottom.

A further improvement of the present invention lies in that cylinder is with a thickness of 19~25mm;Top cover is pyramidal structure, and taper is 120 degree, With a thickness of 60~80mm, venthole (2) are offered on top cover;Bottom cover is with a thickness of 30~40mm.

A further improvement of the present invention lies in that circumferentially arranged on top cover, bottom cover cylindrical surface have wide 2~3mm, thickness 0.5 The circular bar of~1.5mmmm.

A further improvement of the present invention lies in that in step 3, face surface roughness≤1.6 that jacket is contacted with titanium aluminium ingot casting μm, lap surface roughness is 6.3~12.6 μm;Sheath material is titanium or titanium alloy.

A further improvement of the present invention lies in that the extruding that extrusion ratio is 3~4, extrusion speed is 3~10mm/s.

A further improvement of the present invention lies in that the detailed process of extruding are as follows: blank top cover is first directed at extrusion die inner cavity, Pressure ram goes out to be pierced by extrusion die from base bottom cover one end push blank, and it is slow to complete the titanium-aluminium alloy bar heat-preservation cotton squeezed package It is cooled to room temperature.

Compared with prior art, beneficial effects of the present invention:

1) it since heating temperature is high, squeezes lubriation material and is difficult the so high temperature of tolerance, the invention will moisten Sliding material glass protecting lubricant rolls smearing after heating, guarantees the lubricant effect in extrusion process, in addition also to packet Cover material cools down, so that the resistance of deformation of sheath material and titanium-aluminium alloy is consistent, guarantees that subsequent extrusion process is suitable Benefit carries out.

2) titanium-aluminium alloy ingot casting is wrapped among sheath material, by the work of compression in extrusion process used for forming With this stress state can give full play to the plasticity of material, inhibit the generation of crackle.

3) preparation method of the invention is simple, technical process is easy to industrialization, and the titanium-aluminium alloy bar of preparation also can be used Method of the invention carries out a sheathed extrusion again, obtains that crystal grain is more tiny, the smaller bar of specification.

Further, ingot casting is produced using vacuum consumable electrode arc furnace, since the water cooling of crucible acts on, among the ingot casting of preparation Part metallographic structure is single radial arborescent structure, will be carried out after the inconsistent part removal of ingot casting head, tail metallographic structure Hot-working can prevent from being orientated because of crystal grain different cracked in hot procedure.

Detailed description of the invention

Fig. 1 is ingot casting macrostructure of the invention.

Fig. 2 is jacket schematic diagram.

Fig. 3 is the pictorial diagram of bar prepared by the present invention.

In figure, 1 is top cover, and 2 be venthole, and 3 be cylinder, and 4 be bottom cover, and 5 be high silicon oxygen cloth, and 6 be titanium-aluminium alloy ingot casting, 7 For muscle.

Specific embodiment

The present invention is described in detail with reference to the accompanying drawing.

Step 1: titanium-aluminium alloy ingot casting is prepared using vacuum consumable arc-melting method, melting number is melting side three times Method specifically must be controlled crucible coolant water temperature 40~45 when third time melting using conventional titanium alloy smelting method DEG C, ingot casting 1~1.5h cooling time, ingot casting is quickly wrapped up with heat-preservation cotton after coming out of the stove, slow cooling to room temperature.

Step 2: cutting off 100~150mm for the titanium-aluminium alloy ingot casting head of step 1 preparation, tail, then by ingot casting surface and Head, breech face vehicle light, surface roughness≤1.6 μm.To ingot casting, end face carries out low power observation end to end, and macrostructure should be radial Arborescent structure and flawless (see Fig. 1) need to carry out excision until macrostructure meets the requirements again when macrostructure is undesirable.

Step 3: production jacket, referring to fig. 2, jacket includes cylinder 3 and top cover 1, bottom cover 4, and middle cylinder body 3 is with a thickness of 19 ~25mm, top cover 1 are pyramidal structure, and 120 degree of taper, with a thickness of 60~80mm, there are venthole 2,4 thickness of bottom cover on top cover 1 For 30~40mm, top cover 1, bottom cover 4 cylindrical surface on process the muscle 7 of wide 2~3mm, 0.5~1.5mmmm of thickness.Muscle 7 is along circle Cylinder is circumferentially provided with a circle, i.e. muscle 7 is annular, and effect is to be conducive to coating glass protecting lubricant;Jacket and titanium-aluminium alloy are cast Face surface roughness≤1.6 μm of ingot contact, between 6.3~12.6 μm of lap surface roughness, sheath material is titanium or titanium Alloy.

Step 4: it is put after being wrapped up the titanium-aluminium alloy ingot casting 6 that step 2 prepares with the high silicon oxygen cloth 5 with a thickness of 0.5~1mm In the cylinder 3 for entering step 3 preparation, and bottom cover 4, top cover 1 are welded on cylinder 3, obtain sheathed extrusion blank, charge length Control is in 300~400mm.Wherein, high silicon oxygen cloth 5 mainly plays heat-blocking action and the separation convenient for jacket.

Step 5: the sheathed extrusion base that step 4 prepares being put into heating furnace and is heated, and heating temperature is 1300~1400 DEG C, keep the temperature 4~5h.

Step 6: after heat preservation, sheathed extrusion blank is put into preprepared glass protecting lubricant and rolls 2 ~3 times, after blank surface glass protecting lubricant snearing is uniform, sheathed extrusion blank, which is put into progress extrusion ratio in extruder, is 3~4 extruding, extrusion speed are 3~10mm/s.Extrusion process is that blank top cover is first directed at extrusion die inner cavity, pressure ram From base bottom cover one end, push blank goes out to be pierced by extrusion die, completes the titanium-aluminium alloy bar heat-preservation cotton squeezed and wraps up slow cooling to room Temperature.

Step 7: finished product bar is obtained after the bar removal jacket that step 6 is obtained, bar material object is shown in Fig. 3.

It is below specific embodiment.

Embodiment 1

For preparing Ti48Al2Cr2Nb alloy bar material, preparation step is as follows:

Step 1: Ti48Al2Cr2Nb alloy cast ingot is prepared using vacuum consumable arc-melting method, preceding melting twice is adopted Carry out melting with conventional method, when third time melting coolant water temperature control at 45 DEG C, cooling time 1h, with heat-preservation cotton packet after coming out of the stove It wraps up in and is cooled to room temperature, the Ti48Al2Cr2Nb alloy cast ingot specification of preparation is Φ 210mm.

Step 2: it by the ingot casting head of step 1 preparation, tail excision 100mm and strips off the skin to Φ 200mm, ingot casting surface roughness ≤ 1.6 μm, check that head, breech face macrostructure cut 250mm long when macrostructure is radial arborescent structure from ingot casting Degree is used as extrusion billet, referring to Fig. 1.

Step 3: production jacket, referring to fig. 2,3 specification of jacket cylinder: outer diameterInternal diameterHeight 251mm; 1 specification of top cover: thick 70mm, centrum upper surface diameter 125mm, 120 degree of taper, lower end surface diameter 250mm, center is opened Hole;Wide 2mm, the muscle 7 of thick 1mm is distributed on top cover and bottom cover cylindrical surface in bottom cover 4 diameter 250mm, thickness 40mm.

Step 4: Φ 200 × 250mm titanium-aluminium alloy ingot casting 6 of step 2 preparation high silicon oxygen cloth 5 of thickness 0.5mm is wrapped It is put into after wrapping up in the cylinder 3 of step 3 preparation, and top cover 1, bottom cover 4 is welded on cylinder, obtain the packet of 250 × 360mm of Φ Cover extrusion billet.

Step 5: the sheathed extrusion blank that step 4 obtains being put into heating furnace and is heated, and 1380 DEG C of heating temperature, heat preservation Time 5h;

Step 6: after heat preservation, sheathed extrusion blank being put into glass protecting lubricant and rolls around 2 times, blank After watch crystal protecting lubricant snearing is uniform, sheathed extrusion blank is put into extrusion die and is squeezed, extrusion ratio 4, Extrusion speed is 5mm/s.Φ 125 × 1450mm scale rod bar the heat-preservation cotton squeezed out wraps up slow cooling to room temperature.

Step 7: 95 × 1000mm of Φ specification Ti48Al2Cr2Nb alloy is obtained after step 6 is obtained bar removal jacket Bar, referring to Fig. 3.

Embodiment 2

For preparing Ti47Al2Cr2Nb alloy bar material, preparation step is as follows:

Step 1: Ti47Al2Cr2Nb alloy cast ingot is prepared using vacuum consumable arc-melting method, preceding melting twice is adopted Carry out melting with conventional method, when third time melting coolant water temperature control at 45 DEG C, cooling time 1h, with heat-preservation cotton packet after coming out of the stove It wraps up in and is cooled to room temperature, the Ti47Al2Cr2Nb alloy cast ingot specification of preparation is Φ 120mm.

Step 2: it by the ingot casting head of step 1 preparation, tail excision 100mm and strips off the skin to Φ 110mm, ingot casting surface roughness ≤ 1.6 μm, check that head, breech face macrostructure cut 250mm long when macrostructure is radial arborescent structure from ingot casting Degree is used as extrusion billet.

Step 3: production jacket, cylinder specification: outer diameterInternal diameterHeight 251mm;Top cover specification: Thick 70mm, centrum upper surface diameter 85mm, 120 degree of taper, lower end surface diameter 150mm, center is openedHole;Bottom cover diameter Wide 2mm, the muscle of thick 1mm is distributed on top cover and bottom cover cylindrical surface in 150mm, thickness 40mm.

Step 4: Φ 110 × 250mm titanium-aluminium alloy ingot casting of step 2 preparation high silicon oxygen cloth of thickness 0.5mm is wrapped up It is put into the cylinder of step 3 preparation afterwards, and top cover, bottom cover is welded on cylinder, obtain the sheathed extrusion of 150 × 360mm of Φ Blank.

Step 5: the sheathed extrusion blank that step 4 obtains being put into heating furnace and is heated, and 1350 DEG C of heating temperature, heat preservation Time 4h;

Step 6: after heat preservation, sheathed extrusion blank being put into glass protecting lubricant and rolls around 2 times, blank After watch crystal protecting lubricant snearing is uniform, blank is put into extrusion die and is squeezed, extrusion ratio 3, extrusion speed 10mm/s is squeezed and is obtained the heat-preservation cotton package slow cooling to room temperature of 85 × 1120mm of Φ scale rod bar.

Step 7: 57 × 760mm of Φ specification Ti47Al2Cr2Nb alloy is obtained after step 6 is obtained bar removal jacket Bar.

Embodiment 3

For preparing Ti47.5Al2.5V1Cr alloy bar material, preparation step is as follows:

Step 1: Ti47.5Al2.5V1Cr alloy cast ingot, preceding melting twice are prepared using vacuum consumable arc-melting method Melting is carried out using conventional method, by coolant water temperature control at 40 DEG C when third time melting, cooling time 1h, with heat preservation after coming out of the stove Cotton package is cooled to room temperature, and the Ti47.5Al2.5V1Cr alloy cast ingot specification of preparation is Φ 160mm.

Step 2: it by the ingot casting head of step 1 preparation, tail excision 100mm and strips off the skin to Φ 150mm, ingot casting surface roughness ≤ 1.6 μm, check that head, breech face macrostructure cut 250mm long when macrostructure is radial arborescent structure from ingot casting Degree is used as extrusion billet.

Step 3: production jacket, cylinder specification: outer diameterInternal diameterHeight 251mm;Top cover specification: Thick 70mm, centrum upper surface diameter 95mm, 120 degree of taper, lower end surface diameter 190mm, center is openedHole;Bottom cover diameter Wide 2mm, the muscle of thick 1mm is distributed on top cover and bottom cover cylindrical surface in 190mm, thickness 40mm.

Step 4: Φ 150 × 250mm titanium-aluminium alloy ingot casting of step 2 preparation high silicon oxygen cloth of thickness 0.5mm is wrapped up It is put into the cylinder of step 3 preparation afterwards, and top cover, bottom cover is welded on cylinder, obtain the sheathed extrusion of 190 × 360mm of Φ Blank.

Step 5: the sheathed extrusion blank that step 4 obtains being put into heating furnace and is heated, and 1300 DEG C of heating temperature, heat preservation Time 4h;

Step 6: after heat preservation, sheathed extrusion blank being put into glass protecting lubricant and rolls around 2 times, blank After watch crystal protecting lubricant powder snearing applies uniformly, blank is put into extrusion die and is squeezed, extrusion ratio 4 squeezes Speed 8mm/s will squeeze 95 × 1450mm of the Φ scale rod bar heat-preservation cotton obtained and wrap up slow cooling to room temperature.

Step 7: 70 × 1000mm of Φ bar specification is obtained after step 6 is obtained bar removal jacket Ti47.5Al2.5V1Cr alloy bar material.

Embodiment 4

For preparing Ti48Al7Nb2.5V1Cr alloy bar material, preparation step is as follows:

Step 1: preparing Ti48Al7Nb2.5V1Cr alloy cast ingot using vacuum consumable arc-melting method, preceding to melt twice Refining using conventional method carry out melting, third time melting by when coolant water temperature control at 40 DEG C, cooling time, 1.5h, was used after coming out of the stove Heat-preservation cotton package is cooled to room temperature, and the Ti48Al7Nb2.5V1Cr alloy cast ingot specification of preparation is Φ 280mm.

Step 2: it by the ingot casting head of step 1 preparation, tail excision 100mm and strips off the skin to Φ 270mm, ingot casting surface roughness ≤ 1.6 μm, check that head, breech face macrostructure cut 270mm long when macrostructure is radial arborescent structure from ingot casting Degree is used as extrusion billet.

Step 3: production jacket, cylinder specification: outer diameterInternal diameterHeight 271mm;Top cover specification: thick 80mm, centrum upper surface diameter 160mm, 120 degree of taper, lower end surface diameter 320mm, center is openedHole;Bottom cover diameter Wide 2mm, the muscle of thick 1mm is distributed on top cover and bottom cover cylindrical surface in 320mm, thickness 50mm.

Step 4: Φ 270 × 270mm titanium-aluminium alloy ingot casting of step 2 preparation high silicon oxygen cloth of thickness 0.5mm is wrapped up It is put into the cylinder of step 3 preparation afterwards, and top cover, bottom cover is welded on cylinder, obtain the sheathed extrusion of 320 × 400mm of Φ Blank.

Step 5: the sheathed extrusion blank that step 4 obtains being put into heating furnace and is heated, and 1400 DEG C of heating temperature, heat preservation Time 5h.

Step 6: after heat preservation, sheathed extrusion blank being put into glass protecting lubricant and rolls around 2 times, blank After watch crystal protecting lubricant snearing is uniform, blank is put into extrusion die and is squeezed, extrusion ratio 4, extrusion speed 3mm/s will squeeze 160 × 1600mm of the Φ scale rod bar heat-preservation cotton obtained and wrap up slow cooling to room temperature.

Step 7: 130 × 1050mm of Φ specification is obtained after step 6 is obtained bar removal jacket Ti48Al7Nb2.5V1Cr alloy bar material.

Claims (10)

1. a kind of titanium-aluminium alloy bar sheathed extrusion preparation method, which comprises the following steps:
Step 1: titanium-aluminium alloy ingot casting is prepared using vacuum consumable arc-melting method;
Step 2: cutting off 100~150mm for the titanium-aluminium alloy ingot casting head of step 1 preparation, tail, then by ingot casting surface and head, Breech face vehicle light, surface roughness≤1.6 μm;Ingot casting end to end end face macrostructure be radial arborescent structure and flawless;
Step 3: being put into jacket after being wrapped up the titanium-aluminium alloy ingot casting 6 in step 2 with high silicon oxygen cloth, obtains sheathed extrusion base Material;
Step 4: sheathed extrusion blank being put into heating furnace and is heated, and heating temperature is 1300~1400 DEG C, keeps the temperature 4~5h;
Step 5: after heat preservation, sheathed extrusion blank being put into glass protecting lubricant and is rolled 2~3 times, blank surface glass It after glass protecting lubricant snearing is uniform, is squeezed, is cooled down after extruding, obtain titanium-aluminium alloy bar after then removing jacket.
2. a kind of titanium-aluminium alloy bar sheathed extrusion preparation method according to claim 1, which is characterized in that step 1 In, melting number be three times, by the control of crucible coolant water temperature at 40~45 DEG C when third time melting, ingot casting cooling time is 1~ 1.5h, ingot casting are wrapped up after coming out of the stove with heat-preservation cotton, slow cooling to room temperature.
3. a kind of titanium-aluminium alloy bar sheathed extrusion preparation method according to claim 1, which is characterized in that step 2 In, if the macrostructure of ingot casting end face end to end is unsatisfactory for the condition of radial arborescent structure and flawless, carry out excision until Meet condition.
4. a kind of titanium-aluminium alloy bar sheathed extrusion preparation method according to claim 1, which is characterized in that step 3 In, high silicon oxygen cloth with a thickness of 0.5~1mm.
5. a kind of titanium-aluminium alloy bar sheathed extrusion preparation method according to claim 1, which is characterized in that step 3 In, sheathed extrusion charge length is 300~400mm.
6. a kind of titanium-aluminium alloy bar sheathed extrusion preparation method according to claim 1, which is characterized in that step 3 In, jacket includes cylinder (3), top cover (1) and bottom cover (4), and at the top of cylinder (3), bottom cover (4) is arranged in cylinder for top cover (1) setting Body (3) bottom.
7. a kind of titanium-aluminium alloy bar sheathed extrusion preparation method according to claim 6, which is characterized in that cylinder (3) With a thickness of 19~25mm;Top cover (1) is pyramidal structure, and taper is 120 degree, with a thickness of 60~80mm, is offered on top cover (1) logical Stomata (2);Bottom cover (4) is with a thickness of 30~40mm.
8. a kind of titanium-aluminium alloy bar sheathed extrusion preparation method according to claim 6, which is characterized in that in top cover (1), the circumferentially arranged circular bar (7) for having wide 2~3mm, 0.5~1.5mmmm of thickness on bottom cover (4) cylindrical surface.
9. a kind of titanium-aluminium alloy bar sheathed extrusion preparation method according to claim 1, which is characterized in that step 3 In, face surface roughness≤1.6 μm that jacket is contacted with titanium aluminium ingot casting, lap surface roughness is 6.3~12.6 μm;Jacket Material is titanium or titanium alloy.
10. a kind of titanium-aluminium alloy bar sheathed extrusion preparation method according to claim 1, which is characterized in that extrusion ratio For 3~4 extruding, extrusion speed is 3~10mm/s.
CN201811526144.5A 2018-12-13 2018-12-13 Titanium-aluminum alloy bar sheath extrusion preparation method CN109402543B (en)

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Publication number Priority date Publication date Assignee Title
WO2020253884A1 (en) * 2019-06-19 2020-12-24 广东坚美铝型材厂(集团)有限公司 Extrusion method for high-brittleness aluminum alloy, and high-brittleness aluminum alloy extruded piece

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