CN106363021B - A kind of milling method of 1500MPa grades of titanium alloy rod bar - Google Patents
A kind of milling method of 1500MPa grades of titanium alloy rod bar Download PDFInfo
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- CN106363021B CN106363021B CN201610769497.2A CN201610769497A CN106363021B CN 106363021 B CN106363021 B CN 106363021B CN 201610769497 A CN201610769497 A CN 201610769497A CN 106363021 B CN106363021 B CN 106363021B
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- titanium alloy
- bar
- finished product
- 1500mpa
- rolling
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 50
- 238000003801 milling Methods 0.000 title claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 238000005096 rolling process Methods 0.000 claims abstract description 25
- 230000032683 aging Effects 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 239000006104 solid solution Substances 0.000 claims abstract description 7
- 230000008520 organization Effects 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 230000008602 contraction Effects 0.000 abstract description 4
- 239000010936 titanium Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001040 Beta-titanium Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing 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
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
Abstract
A kind of milling method of 1500MPa grades of titanium alloy rod bars disclosed by the invention, is specifically implemented according to the following steps：Step 1, selection Ti 6Al 4Mo 4Zr 2Sn 2Cr 1Fe 1Nb bar stocks；Step 2, under air atmosphere, carry out isothermal holding using the bar stock selected in heating furnace heating stepses 1, and to it；The bar stock obtained after step 2 processing is positioned on open-train mill by step 3, heated to be rolling to finished product bar stock；Step 4, by the finished product bar stock after step 3 rolling, successively through solid solution, ageing treatment, finally align grinding to titanium alloy finished product bar.A kind of milling method of 1500MPa grades of titanium alloy rod bar of the present invention, the high-strength titanium alloy tensile strength of rolling is more than 1500MPa, while elongation percentage and the contraction percentage of area can reach 10% and 30% respectively.
Description
Technical field
The invention belongs to non-ferrous metals processing method and technology fields, and in particular to a kind of 1500MPa grades of titanium alloy rod bar
Milling method.
Background technology
It since titanium alloy has higher specific strength, good corrosion resistance, and can be on active service at a higher temperature, by conduct
Aircraft structure designs and the main material of manufacture.To realize a large amount of losss of weight, increasing thrust-weight ratio, raising flying speed and continuation of the journey energy
The mesh of power, the steel of aircraft grid beam and the nickel-base alloy of engine manufacture are gradually replaced by titanium alloy.
With the development of Aeronautics and Astronautics technology, general tensile strength be the alpha+beta titanium alloys of 1000MPa~1200MPa not
It can meet the requirement of airplane design, and tensile strength reaches the titanium alloys such as β 21s, β-C of 1400MPa or so its design strengths and wants
It asks as 1300MPa, many components for military service intensity in 1500MPa or more are still using steel alloy.Therefore, exploitation is a kind of anti-
Tensile strength reaches 1600MPa, designs use intensity in 1500MPa grades of superhigh intensity titanium alloy to China's Aeronautics and Astronautics cause
There is great progradation.
Invention content
The purpose of the present invention is to provide a kind of milling method of 1500MPa grades of titanium alloy rod bar, the high-strength titanium of rolling closes
Golden tensile strength is more than 1500MPa, while elongation percentage and the contraction percentage of area can reach 10% and 30% respectively.
The technical solution adopted in the present invention is a kind of milling method of 1500MPa grades of titanium alloy rod bar, specifically according to
Lower step is implemented：
Step 1, selection Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar stocks；
Step 2, under air atmosphere, using the Ti-6Al-4Mo-4Zr-2Sn-2Cr- selected in heating furnace heating stepses 1
1Fe-1Nb bar stocks, and isothermal holding is carried out to it；
The bar stock obtained after step 2 processing is positioned on open-train mill by step 3, heated to be rolling to finished product
Bar stock；
Finished product bar stock after step 3 rolling is finally aligned grinding by step 4 successively through solid solution, ageing treatment
To titanium alloy finished product bar, obtained titanium alloy finished product bar is that nominal composition is Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-
1Nb, tensile strength are more than the small dimension titanium alloy rod bar of 1500MPa.
The features of the present invention also characterized in that：
The Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar stocks selected in step 1, standard are specific as follows：
The cross-sectional diameter of Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar stocks be 45mm~55mm, surface be with
The casting skin of oxide layer passes through the processing that strips off the skin, and horizontal organization and longitudinal tissue are uniform.
Heating furnace is using resistance-type heating furnace in step 2.
Heating temperature is 780 DEG C~900 DEG C in step 2.
Soaking time is 1h~2h in step 2.
During the heating rolling of step 3：Deflection total amount is 85.0%~98.0%, the pass system of open-train mill
Flat-square for circle-, by 8~18 passes, every time deflection is 10%~30%.
The beneficial effects of the present invention are：
(1) a kind of milling method of 1500MPa grades of titanium alloy rod bar of the present invention, can produce a kind of tensile strength is more than
1500MPa, elongation percentage and the contraction percentage of area small dimension Ti-6Al-4Mo-4Zr-2Sn-2Cr- more than 10% and 30% respectively
1Fe-1Nb titanium alloy rod bars.
(2) a kind of milling method of 1500MPa grades of titanium alloy rod bar of the present invention, solves current high-strength titanium alloy and does not have
The problem of High-strength high-plasticity, filled up China's Service Environment 1500MPa grades of high-strength high-ductility titanium alloy blank.
Description of the drawings
Fig. 1 is the Ti-6Al-4Mo-4Zr- using a kind of milling method rolling of 1500MPa grades of titanium alloy rod bar of the present invention
The high power micro-organization chart of longitudinal tissue of the small bars of 2Sn-2Cr-1Fe-1Nb；
Fig. 2 is the Ti-6Al-4Mo-4Zr- using a kind of milling method rolling of 1500MPa grades of titanium alloy rod bar of the present invention
The horizontal organization high power micro-organization chart of the small bars of 2Sn-2Cr-1Fe-1Nb；
Fig. 3 is the Ti-6Al-4Mo-4Zr- using a kind of milling method rolling of 1500MPa grades of titanium alloy rod bar of the present invention
The mechanical property figure of the small bars of 2Sn-2Cr-1Fe-1Nb.
Specific implementation mode
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
A kind of milling method of 1500MPa grades of titanium alloy rod bar of the present invention, is specifically implemented according to the following steps：
A kind of milling method of 1500MPa grades of titanium alloy rod bar of the present invention, is specifically implemented according to the following steps：
Step 1, selection Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar stocks, selection criteria are specific as follows：
The cross-sectional diameter of Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar stocks be 45mm~55mm, surface be with
The casting skin of oxide layer passes through the processing that strips off the skin, and horizontal organization and longitudinal tissue are uniform.
Step 2, under air atmosphere, using the Ti-6Al-4Mo-4Zr-2Sn-2Cr- selected in heating furnace heating stepses 1
1Fe-1Nb bar stocks, and isothermal holding is carried out to it；
Wherein, heating furnace is using resistance-type heating furnace, and heating temperature is 780 DEG C~900 DEG C in heating process；Heat preservation
Time is 1h~2h.
The bar stock obtained after step 2 processing is positioned on open-train mill by step 3, heated to be rolling to finished product
Bar stock；
During heating rolling：Deflection total amount is 85.0%~98.0%, and the pass system of open-train mill is circle-
Flat-side, by 8~18 passes, every time deflection is 10%~30%.
Finished product bar stock after step 3 rolling is finally aligned grinding by step 4 successively through solid solution, ageing treatment
To titanium alloy finished product bar, obtained titanium alloy finished product bar is that nominal composition is Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-
1Nb, tensile strength are more than the small dimension titanium alloy rod bar of 1500MPa.
What is obtained using a kind of milling method of 1500MPa grades of titanium alloy rod bar of the present invention is that a kind of tensile strength reaches
1610MPa, elongation percentage reach 12%, the small-sized bar that reduction of area is 40%.
Embodiment 1
Selection Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar stocks, selection criteria are：
The cross-sectional diameter of Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar stocks is 45mm, and surface is with oxide layer
Casting skin or by stripping off the skin processing, and horizontal organization and longitudinal tissue are uniform；
Under air atmosphere, using the Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb of resistance-type heating stove heat selection
Bar stock, heating temperature is 780 DEG C, and isothermal holding is carried out to it, and soaking time 1h obtains pieces of bar stock；
Pieces of bar stock is positioned on open-train mill to heating rolling is to finished product bar stock, during heating rolling：Become
Shape amount total amount is 85.0%, and the pass system of open-train mill is that circle-is flat-square, and by 8 passes, every time deflection is
15%~30%；
By the finished product bar stock after rolling, successively through solid solution, ageing treatment, grinding is finally aligned to titanium alloy finished product stick
Material, obtained titanium alloy finished product bar are that nominal composition is Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb, and tensile strength is super
Cross the small dimension titanium alloy rod bar of 1500MPa.
Embodiment 2
Selection Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar stocks, selection criteria are：
The cross-sectional diameter of Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar stocks is 50mm, and surface is with oxide layer
Casting skin or by stripping off the skin processing, and horizontal organization and longitudinal tissue are uniform；
Under air atmosphere, using the Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb of resistance-type heating stove heat selection
Bar stock, heating temperature is 900 DEG C, and isothermal holding is carried out to it, and soaking time 1.5h obtains pieces of bar stock；
Pieces of bar stock is positioned on open-train mill to heating rolling is to finished product bar stock, during heating rolling：Become
Shape amount total amount is 95.0%, and the pass system of open-train mill is that circle-is flat-square, and by 14 passes, every time deflection is
10%~22%；
By the finished product bar stock after rolling, successively through solid solution, ageing treatment, grinding is finally aligned to titanium alloy finished product stick
Material, obtained titanium alloy finished product bar are that nominal composition is Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb, and tensile strength is super
Cross the small dimension titanium alloy rod bar of 1500MPa.
Embodiment 3
Selection Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar stocks, selection criteria are：
The cross-sectional diameter of Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar stocks is 55mm, and surface is with oxide layer
Casting skin or by stripping off the skin processing, and horizontal organization and longitudinal tissue are uniform；
Under air atmosphere, using the Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb of resistance-type heating stove heat selection
Bar stock, heating temperature is 780 DEG C, and isothermal holding is carried out to it, and soaking time 2.0h obtains pieces of bar stock；
Pieces of bar stock is positioned on open-train mill to heating rolling is to finished product bar stock, during heating rolling：Become
Shape amount total amount is 98.0%, and the pass system of open-train mill is that circle-is flat-square, and by 18 passes, every time deflection is
18%~30%；
By the finished product bar stock after rolling, successively through solid solution, ageing treatment, grinding is finally aligned to titanium alloy finished product stick
Material, obtained titanium alloy finished product bar are that nominal composition is Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb, and tensile strength is super
Cross the small dimension titanium alloy rod bar of 1500MPa.
It can be seen that by Fig. 1 and Fig. 2：It can be given birth to using a kind of milling method of 1500MPa grades of titanium alloy rod bar of the present invention
Output longitudinal tissue and the small bars of the uniform Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb of horizontal organization.
As shown in figure 3, using a kind of titanium alloy that the milling method of 1500MPa grades of titanium alloy rod bar is produced of the present invention at
Product bar, tensile strength have been more than 1500MPa.
A kind of milling method of 1500MPa grades of titanium alloy rod bar of the present invention, solve current high-strength titanium alloy do not have it is anti-
The problem of tensile strength is more than 1500MPa, while elongation percentage and the contraction percentage of area are not achieved 10% and 30%.
Claims (3)
1. a kind of milling method of 1500MPa grades of titanium alloy rod bar, which is characterized in that be specifically implemented according to the following steps：
Step 1, selection Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar stocks；
The cross-sectional diameter of Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar stocks is 45mm~55mm, and surface is with oxidation
The casting skin of layer passes through the processing that strips off the skin, and horizontal organization and longitudinal tissue are uniform；
Step 2, under air atmosphere, using the Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe- selected in heating furnace heating stepses 1
1Nb bar stocks, heating temperature is 780 DEG C~900 DEG C, and carries out isothermal holding to it；
The bar stock obtained after step 2 processing is positioned on open-train mill by step 3, heated to be rolling to finished product bar stock；
During heating rolling：Deflection total amount is 85.0%~98.0%, and the pass system of open-train mill is that circle-is flat-square, warp
8~18 passes are crossed, every time deflection is 10%~30%；
Step 4, by the finished product bar stock after step 3 rolling, successively through solid solution, ageing treatment, finally align grinding to titanium
Alloy finished product bar, obtained titanium alloy finished product bar are that nominal composition is Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb,
Tensile strength is more than the small dimension titanium alloy rod bar of 1500MPa.
2. a kind of milling method of 1500MPa grades of titanium alloy rod bars according to claim 1, which is characterized in that the step
Heating furnace is using resistance-type heating furnace in rapid 2.
3. a kind of milling method of 1500MPa grades of titanium alloy rod bars according to claim 1, which is characterized in that the step
Soaking time is 1h~2h in rapid 2.
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| CN201610769497.2A CN106363021B (en) | 2016-08-30 | 2016-08-30 | A kind of milling method of 1500MPa grades of titanium alloy rod bar |
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| CN201610769497.2A CN106363021B (en) | 2016-08-30 | 2016-08-30 | A kind of milling method of 1500MPa grades of titanium alloy rod bar |
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| CN107214207A (en) * | 2017-05-22 | 2017-09-29 | 西部超导材料科技股份有限公司 | A kind of processing method of high uniform beta titanium alloy bar |
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| US10053758B2 (en) * | 2010-01-22 | 2018-08-21 | Ati Properties Llc | Production of high strength titanium |
| AT509768B1 (en) * | 2010-05-12 | 2012-04-15 | Boehler Schmiedetechnik Gmbh & Co Kg | METHOD FOR PRODUCING A COMPONENT AND COMPONENTS FROM A TITANIUM ALUMINUM BASE ALLOY |
| CN103667788B (en) * | 2012-09-14 | 2016-12-21 | 北京工业大学 | A kind of titanium alloy and Technology for Heating Processing |
| CN102978437A (en) * | 2012-11-23 | 2013-03-20 | 西部金属材料股份有限公司 | Alpha plus beta two-phase titanium alloy and method for processing same |
| CN104532057B (en) * | 2014-12-11 | 2017-01-04 | 西部超导材料科技股份有限公司 | A kind of Ti6242 titanium alloy and the preparation method of small-sized bar thereof |
| CN105251804B (en) * | 2015-10-28 | 2018-05-08 | 西部超导材料科技股份有限公司 | A kind of milling method of six square rod of TC6 titanium alloys |
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