CN117483473A - Processing method of Ti45Nb titanium alloy straight wire - Google Patents
Processing method of Ti45Nb titanium alloy straight wire Download PDFInfo
- Publication number
- CN117483473A CN117483473A CN202311451029.7A CN202311451029A CN117483473A CN 117483473 A CN117483473 A CN 117483473A CN 202311451029 A CN202311451029 A CN 202311451029A CN 117483473 A CN117483473 A CN 117483473A
- Authority
- CN
- China
- Prior art keywords
- forging
- ti45nb
- titanium alloy
- wire rod
- phi
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 64
- 238000003672 processing method Methods 0.000 title claims abstract description 9
- 238000005242 forging Methods 0.000 claims abstract description 61
- 238000000137 annealing Methods 0.000 claims abstract description 47
- 238000010622 cold drawing Methods 0.000 claims abstract description 46
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 30
- 229910052786 argon Inorganic materials 0.000 claims abstract description 20
- 238000005098 hot rolling Methods 0.000 claims abstract description 14
- 238000011049 filling Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims description 36
- 238000010438 heat treatment Methods 0.000 claims description 29
- 239000000314 lubricant Substances 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000000839 emulsion Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000010304 firing Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 description 9
- 238000000227 grinding Methods 0.000 description 9
- 238000005491 wire drawing Methods 0.000 description 7
- 239000002131 composite material Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 238000010008 shearing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- RJSRQTFBFAJJIL-UHFFFAOYSA-N niobium titanium Chemical compound [Ti].[Nb] RJSRQTFBFAJJIL-UHFFFAOYSA-N 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000003908 quality control method Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910001257 Nb alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C9/00—Cooling, heating or lubricating drawing material
- B21C9/02—Selection of compositions therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/04—Shaping in the rough solely by forging or pressing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention provides a processing method of a Ti45Nb titanium alloy straight wire, which comprises the steps of cogging and forging a Ti45Nb titanium alloy cast ingot with qualified components; repeatedly upsetting and pulling the forging stock to deform; hot rolling the rod blank; cold drawing of a roller die; intermediate annealing; cold drawing of a roller die; argon filling on-line continuous annealing; and (5) vertical electric alignment. The Ti45Nb titanium alloy straight wire prepared by the method has the advantages of simple operation, stable and controllable process, straightness less than or equal to 2.0mm/m, ovality less than or equal to 0.02mm, surface roughness Ra less than or equal to 1.0 mu m, uniform and fine microstructure, qualified eddy current flaw detection, high consistency and stability of mechanical properties at room temperature in an annealed state, and meets the requirements of related standards.
Description
Technical Field
The invention belongs to the technical field of titanium alloy material processing, and particularly relates to a processing method of a Ti45Nb titanium alloy straight wire.
Background
The use level of the titanium alloy material and the composite material becomes an important expression of the advanced performance of the aircraft, more and more titanium alloy materials and composite materials are selected for the advanced aircraft at home and abroad, and the use level of the titanium alloy fastener serving as the composite material connecting piece is increased. In recent years, titanium alloy fasteners replace heavier steel fasteners, have obvious weight reduction effects, and have been widely applied to modern aviation and aerospace mechanical connection structures, so as to further reduce the weight of the aircraft, improve the reliability of connection parts and prolong the design service life of the aircraft. The titanium alloy has excellent corrosion resistance, particularly the positive potential performance of the titanium alloy is exactly matched with that of the carbon fiber composite material, so that the galvanic corrosion of the fastener is effectively prevented, the characteristic is that any other material cannot be replaced, and the titanium alloy fastener is another reason that the titanium alloy fastener is rapidly developed and the use amount is increased year by year.
The Ti45Nb alloy is a special rivet material used in aerospace products in the United states in a large quantity, has good tensile property (441-490 MPa), shearing strength (365 MPa) and high plasticity (the elongation can reach more than 20 percent, the area reduction rate is as high as 60-80 percent) in an annealed state, has excellent cold workability, and is suitable for manufacturing rivet connectors of composite materials. Among titanium alloy materials used for rivet materials, titanium niobium rivets and pure titanium rivets are easier to rivet and form, and the shearing strength and tensile strength of titanium niobium alloy are higher than those of pure titanium, and the deformation resistance is lower than that of pure titanium, so that titanium niobium rivets with excellent cold workability are all used in aerospace products in the United states.
Although Ti45Nb titanium alloy rivet is the best choice for connecting composite materials, the wire surface quality control difficulty is high because of low deformation resistance, high surface viscosity and high possibility of surface scratch. The Ti45Nb titanium alloy rivet has higher requirements on the surface quality and the dimensional accuracy of wires in the continuous riveting process. The preparation process adopted by the patent (CN 107282688A-a preparation method of Ti45Nb alloy wire rod) is complex, equipment parameters of preparation tools such as a twelve-square-hole cold continuous rolling mill, a round flat hole, a round hole and the like are complex, the equipment requirements are high, the large-scale production is not facilitated, and the processing cost is high.
Disclosure of Invention
In view of the above, the invention aims to provide a processing method of Ti45Nb titanium alloy straight wire, which adopts common equipment to realize the processing of the Ti45Nb titanium alloy straight wire with bright surface, high dimensional accuracy, simple operation and stable and controllable process through the combination of cogging forging, repeated upsetting, hot rolling, roller die cold drawing, intermediate annealing, argon filling on-line annealing and vertical electric straightening.
The invention provides a processing method of a Ti45Nb titanium alloy straight wire, which comprises the following steps:
1) Heating the Ti45Nb titanium alloy cast ingot with qualified components to 1000-1150 ℃, cogging, forging and air cooling to obtain a forging stock;
2) Heating the forging stock to 800-900 ℃, upsetting, forging and air cooling to obtain a rod blank;
3) Heating the rod blank to 800-900 ℃ for hot rolling, and air cooling to obtain a wire rod with the diameter phi of 9.0-phi 10.0 mm;
4) After coating the surface of the wire rod with a lubricant, carrying out multi-pass bright cold drawing to obtain a wire rod;
5) Performing intermediate annealing treatment on the wire rod, and performing surface oxide skin cleaning after water cooling;
6) After the lubricant is coated again, carrying out multi-pass bright cold drawing to obtain a wire rod;
7) And carrying out argon filling on-line continuous annealing treatment on the wire rod to obtain a straight wire rod, and then carrying out vertical electric straightening to obtain the Ti45Nb titanium alloy straight wire rod.
Preferably, in the step 1), 1-2 times of cogging forging is performed; the forging pier drawing times of each firing time are not more than three piers and three drawing times;
the upsetting deformation of the cogging forging is controlled to be 45-60%.
Preferably, in the step 2), 2-3 times of repeated upsetting forging are carried out; the forging pier drawing times of each firing time are not more than two piers and two drawing times;
the upsetting deformation of the upsetting forging is controlled to be 40-55%.
Preferably, the diameter of the bar blank is phi 80.0-phi 100.0mm, and the weight is 30.0-50.0 kg.
Preferably, the speed of the multi-pass bright cold drawing in the step 4) is 15-100 m/min, and the deformation amount of each drawing pass is lower than 20%;
the speed of the multi-pass bright cold drawing in the step 6) is 20-150 m/min, and the deformation of each drawing pass is lower than 25%.
Preferably, the temperature of the intermediate annealing treatment in the step 5) is 750-850 ℃, and the heat preservation time is 30-60 min;
the temperature of the argon-filled online continuous annealing treatment in the step 7) is 700-850 ℃, and the travelling speed of the wire is 2-10 m/min.
Preferably, the heating temperature of the vertical electrical straightening in step 7) is controlled between 500 and 600 ℃.
Preferably, the lubricant is a graphite emulsion lubricant.
The invention provides a processing method of a Ti45Nb titanium alloy straight wire, which comprises the following steps: 1) Heating the Ti45Nb titanium alloy cast ingot with qualified components to 1000-1150 ℃, cogging, forging and air cooling to obtain a forging stock; 2) Heating the forging stock to 800-900 ℃, upsetting, forging and air cooling to obtain a rod blank; 3) Heating the rod blank to 800-900 ℃ for hot rolling, and air cooling to obtain a wire rod with the diameter phi of 9.0-phi 10.0 mm; 4) After coating the surface of the wire rod with a lubricant, carrying out multi-pass bright cold drawing to obtain a wire rod; 5) Performing intermediate annealing treatment on the wire rod of the disc in the step 4), and cleaning surface oxide skin after water cooling; 6) After the lubricant is coated again, carrying out multi-pass bright cold drawing to obtain a wire rod; 7) And carrying out argon filling on-line continuous annealing treatment on the wire rod to obtain a straight wire rod, and then carrying out vertical electric straightening to obtain the Ti45Nb titanium alloy straight wire rod. The method provided by the invention is simple to operate, stable and controllable in process, less than or equal to 2.0mm/m in straightness, less than or equal to 0.02mm in ovality, less than or equal to 1.0 mu m in surface roughness Ra, uniform and fine in microstructure, qualified in eddy current flaw detection, high in room-temperature mechanical property consistency and stability in an annealed state, and capable of meeting the requirements of relevant standards, and effectively solves the problems of low dimensional control precision, insufficient surface roughness, uneven form control, low production efficiency, low surface quality control and the like of the conventional Ti45Nb titanium alloy wire.
Drawings
FIG. 1 is a microstructure of a Ti45Nb titanium alloy straight wire prepared in example 1 of the invention;
FIG. 2 is a microstructure of a Ti45Nb titanium alloy wire made in accordance with example 2 of the present invention;
FIG. 3 is a microstructure of a Ti45Nb titanium alloy wire made in accordance with example 3 of the invention.
Detailed Description
The invention provides a processing method of a Ti45Nb titanium alloy straight wire, which comprises the following steps:
1) Heating the Ti45Nb titanium alloy cast ingot with qualified components to 1000-1150 ℃, cogging, forging and air cooling to obtain a forging stock;
2) Heating the forging stock to 800-900 ℃, upsetting, forging and air cooling to obtain a rod blank;
3) Heating the rod blank to 800-900 ℃ for hot rolling, and air cooling to obtain a wire rod with the diameter phi of 9.0-phi 10.0 mm;
4) After coating the surface of the wire rod with a lubricant, carrying out multi-pass bright cold drawing to obtain a wire rod;
5) Performing intermediate annealing treatment on the wire rod of the disc coil obtained in the step 4), and cleaning surface oxide skin after water cooling;
6) After the lubricant is coated again, carrying out multi-pass bright cold drawing to obtain a wire rod;
7) And (3) carrying out argon filling online continuous annealing treatment on the wire rod of the disc coil obtained in the step (6) to obtain a straight wire rod, and then carrying out vertical electric straightening to obtain the Ti45Nb titanium alloy straight wire rod.
The method provided by the invention effectively combines the treatment means of cogging forging, repeated upsetting, hot rolling, roller-die cold drawing, intermediate annealing, argon filling on-line annealing, vertical electric straightening and the like, strictly controls cogging forging, hot rolling temperature, heat preservation time, hot rolling pass deformation and the like, ensures that the Ti45Nb titanium alloy microstructure is sufficiently refined and homogenized, and is favorable for the smooth implementation of the subsequent drawing process; in the subsequent bright cold drawing process of the roller die, the pass deformation is strictly controlled, reasonable, feasible and effective lubrication auxiliary measures are provided, the occurrence of cracks, defects and even broken wires which possibly occur in the drawing process is avoided, and meanwhile, the dimensional accuracy of the wire is ensured; in the drawing process, the working procedures of intermediate annealing, argon filling on-line continuous annealing, vertical electric straightening and the like are reasonably arranged, so that residual stress possibly caused by partial deformation and non-uniformity in the drawing process of the titanium alloy wire is effectively removed, meanwhile, the straightness of the wire and the hydrogen permeation problem possibly existing on the surface are ensured, and the problems of low dimensional control precision, insufficient surface roughness, uneven form control, low production efficiency, low surface quality control and the like existing in the conventional Ti45Nb titanium alloy wire are effectively solved.
The invention heats the Ti45Nb titanium alloy cast ingot to 1000-1150 ℃, cogging, forging and air cooling to obtain a forging stock. The invention preferably performs cogging forging with 1-2 firing times; the forging pier drawing times of each firing time are not more than three piers and three drawing times; the upsetting deformation of the cogging forging is controlled to be 45-60%; in the specific embodiment, two piers and two pulls are adopted, and the upsetting deformation of the first pass is 50% or 55%; the second pass upsetting deformation is 50% or 55%. In the specific embodiment, ti45Nb titanium alloy cast ingots which are qualified by chemical component inspection are adopted; the Ti45Nb titanium alloy ingot is heated to 1100 ℃, 1080 ℃ or 1050 ℃.
The forging stock is heated to 800-900 ℃, forged by heading and air cooling, and a bar stock is obtained. The invention preferably carries out repeated upsetting and pulling forging for 2-3 times; the forging pier drawing times of each firing time are not more than two piers and two drawing times; the upsetting deformation of the upsetting forging is controlled to be 40-55%. The diameter of the bar blank is phi 80.0 mm-phi 100.0mm, the weight is 30.0-50.0 kg, and the surface is free from defect. In particular embodiments, the forging stock is heated to 880 ℃, 850 ℃ or 860 ℃. In some embodiments, a 2-pass two-pier two-pull iterative pier pull forging is performed, the first pass pier pull deflection is 50%, and the second pass pier pull deflection is 45%; in some embodiments, a 2-pass two-pier two-pull iterative pier pull forging is performed, with a first pass pier pull deflection of 55% and a second pass pier pull deflection of 50%; in some embodiments, a 3-pass two-pier two-shot, repeated pier-pull forging is performed with a first pass pier-pull deflection of 45% and a second pass pier-pull deflection of 50%.
In the steps 1) and 2), a quick forging machine with simple operation is adopted to perform cogging forging and repeated upsetting forging on the Ti45Nb titanium alloy cast ingot, so that the microstructure of the alloy is fully refined and homogenized.
The rod blank is heated to 800-900 ℃ for hot rolling and air cooling, so as to obtain the wire rod with the diameter phi 9.0-phi 10.0 mm. The invention adopts hot rolling equipment to hot-roll the Ti45Nb titanium alloy rod blank into the wire rod wire suitable for the subsequent roller die drawing, so that the alloy microstructure is further fully refined and homogenized. In a specific embodiment, the rod blank is heated to 850 ℃, 820 ℃, or 860 ℃. The diameter of the wire rod wire is phi 9.6mm, phi 9.2mm or phi 9.3mm.
After the surface of the wire rod wire is coated with the lubricant, carrying out multi-pass bright cold drawing to obtain the wire rod. The speed of the multipass bright cold drawing is 15-100 m/min, and the deformation of each drawing pass is lower than 20%; in some embodiments, 3-pass bright cold drawing is performed, wherein the diameter of the wire after cold drawing of each pass of roller die is phi 9.0mm, phi 8.5mm and phi 8.2mm respectively; in some embodiments, 4-pass bright cold drawing is performed, and the wire diameter after cold drawing of each pass of roller die is phi 8.6mm, phi 8.0mm, phi 7.4mm and phi 6.8mm respectively; in some embodiments, 7 passes of bright cold drawing are performed, and the wire diameter after each pass of cold drawing is phi 8.8mm, phi 8.0mm, phi 7.2mm, phi 6.5mm, phi 6.0mm, phi 5.5mm, phi 5.0mm, respectively. The drawing speed is 60m/min, 85m/min or 120m/min; the diameter of the coarse disc wire is phi 8.2mm, phi 6.8mm or phi 5.0mm.
The invention carries out intermediate annealing treatment on the coarse disc wire rod, and carries out surface oxide skin cleaning after water cooling. The temperature of the intermediate annealing treatment is 750-850 ℃, and the heat preservation time is 30-60 min. In a specific embodiment, the temperature of the intermediate anneal is 780 ℃, 820 ℃, 800 ℃; the time of heat preservation is specifically 40min, 35min and 45min. The invention adopts the intermediate annealing treatment, eliminates the residual stress generated by uneven deformation of the wire in the continuous drawing process, further refines the grain structure through the intermediate annealing, and improves the process plasticity. Meanwhile, after annealing, a water cooling mode is adopted, so that the surface hardness of the wire is improved, the surface viscosity of the wire is reduced, and the surface defects of the wire are removed.
After the lubricant is coated again, carrying out multi-pass bright cold drawing to obtain a wire rod; the speed of the multipass bright cold drawing is 20-150 m/min, and the deformation of each drawing pass is lower than 25%. In some embodiments, when preparing the wire rod of the disc, 4-pass bright cold drawing is carried out, and the diameter of the wire rod after cold drawing of each pass of roller die is phi 7.8mm, phi 7.2mm, phi 6.6mm and phi 6.0mm respectively; in some embodiments, 5 passes of bright cold drawing are performed, and the wire diameter after each pass of cold drawing of the roller die is phi 6.2mm, phi 5.6mm, phi 5.0mm, phi 4.5mm and phi 4.0mm respectively; in some embodiments, 6 passes of bright cold drawing are performed, and the wire diameter after each pass of cold drawing is phi 4.5mm, phi 4.0mm, phi 3.6mm, phi 3.2mm, phi 2.8mm, phi 2.5mm, respectively. In a specific embodiment, the drawing speed is 100m/min or 80m/min. The diameter of the wire rod is phi 6.0mm, phi 4.0mm or phi 2.5mm.
The lubricant adopted by the invention is graphite emulsion lubricating liquid. Compared with the traditional eye film cold drawing process, the invention adopts an advanced roller die wire drawing machine to improve the drawing speed and the production efficiency, and simultaneously, the invention can effectively improve the brightness of the wire surface due to high die precision, simultaneously, ensure the diameter tolerance and ovality requirements of the wire, and solve the problems of rivet surface pull injury, die clamping and the like caused by insufficient wire size precision.
According to the invention, the wire rod is subjected to argon filling online continuous annealing treatment to obtain a straight wire rod, and then vertical electric straightening is carried out to obtain the Ti45Nb titanium alloy straight wire rod. During the argon filling online continuous annealing treatment, the purity of the argon filled in the furnace is more than or equal to 99.99 percent, and the micro positive pressure for the inert gas to overflow is maintained. The temperature of the argon-filled online continuous annealing treatment is 700-850 ℃, and the travelling speed of the wire is 2-10 m/min. The heating temperature of the vertical electric straightening is controlled to be 500-600 ℃. In a specific embodiment, the temperature of the argon-filled online continuous annealing treatment is 750 ℃, 780 ℃ or 800 ℃; the running speed of the wire is 8m/min or 6m/min. The diameter of the straight wire is phi 6.0mm and phi 4.5mm. The heating temperature for the vertical electrical straightening was specifically 560 ℃, 550 ℃, 580 ℃.
According to the invention, the wire is subjected to argon filling online continuous annealing treatment, so that the residual stress of the wire is eliminated, and meanwhile, the wire coil wire is subjected to nearly 100m argon filling online continuous annealing, so that the requirement of the Ti45Nb titanium alloy straight wire on straightness is improved, the problem that the straightness cannot be ensured after the wire is annealed due to limited space in the traditional vacuum annealing furnace is solved, and the potential surface hydrogen pollution of the alloy wire in the processing process is effectively removed. The invention further improves the straightness of the wire by heating and vertical loading.
The Ti45Nb titanium alloy straight wire prepared by the invention is specifically a Ti45Nb titanium alloy wire with the diameter of 2.5mm, a Ti45Nb titanium alloy wire with the diameter of 4.0mm or a Ti45Nb titanium alloy wire with the diameter of 6.0 mm.
In order to further illustrate the present invention, a method for processing a Ti45Nb titanium alloy wire according to the present invention is described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
The method for preparing the Ti45Nb titanium alloy wires with the diameter of 6.0mm comprises the following steps:
step one: heating a Ti45Nb titanium alloy cast ingot with qualified chemical composition inspection to 1100 ℃, performing two-pier two-drawing forging for 2 times, wherein the first-pass upsetting deformation is 50%, the second-pass upsetting deformation is 55%, and performing surface grinding treatment after air cooling to obtain a forging stock;
step two: heating the forging stock in the first step to 880 ℃, performing 2-fire two-pier two-drawing repeated pier drawing forging, wherein the first-pass pier drawing deformation is 50%, the second-pass pier drawing deformation is 45%, and performing surface grinding treatment after air cooling to obtain a rod blank;
step three: heating the rod blank obtained in the second step to 850 ℃, carrying out hot rolling, and carrying out surface grinding treatment after air cooling to obtain a wire rod with the diameter phi of 9.6 mm;
and step four, coating the surface of the wire rod obtained in the step three with emulsion, and then carrying out 3-pass bright cold drawing on a roller die wire drawing machine, wherein the diameters of the wire rod after each-pass roller die cold drawing are phi 9.0mm, phi 8.5mm and phi 8.2mm respectively, and the drawing speed is controlled at 60m/min, so as to obtain the wire rod with phi 8.2 mm.
Step five: and (3) placing the wire rods obtained in the fourth step into a well annealing furnace for intermediate annealing, preserving heat at 780 ℃ for 40min, cooling with water, and cleaning surface oxide skin and surface defects after cooling.
Step six: and (3) coating the emulsion on the surface of the wire rod obtained in the step (V), and carrying out 4 times of bright cold drawing on a roller die wire drawing machine, wherein the diameter of the wire rod after each time of roller die cold drawing is respectively phi 7.8mm, phi 7.2mm, phi 6.6mm and phi 6.0mm, and the drawing speed is controlled at 100m/min, so as to obtain the wire rod with phi 6.0 mm.
Step seven: and D, annealing the wire rod obtained in the step six in a continuous annealing furnace filled with high-purity argon, wherein the annealing temperature is 800 ℃, and the wire rod travelling speed is 6m/min, so as to obtain the Ti45Nb titanium alloy straight wire rod with the phi of 6.0 mm.
Step eight: and D, vertically and electrically straightening the straight wire obtained in the step seven, wherein the heating temperature is 580 ℃.
The straightness of the Ti45Nb titanium alloy wires prepared by adopting the embodiment is 1.2mm/m, the diameter deviation is-0.01 mm, the ellipticity is 0.01mm, the surface roughness Ra is 0.8 mu m, the tensile strength under the room temperature condition is 552MPa, the yield strength is 491MPa, the elongation is 22.5%, the area shrinkage is 76.8%, the shearing strength is 382MPa, the eddy current flaw detection is qualified, the microstructure is shown in figure 1, and the requirements of related technical standards are met.
Example 2
The method for preparing the Ti45Nb titanium alloy wires with the diameter of 4.0mm comprises the following steps:
step one: heating a Ti45Nb titanium alloy cast ingot with qualified chemical composition inspection to 1080 ℃, performing three-pier three-drawing forging for 1 fire time, wherein the upsetting deformation of the first time is 50%, the upsetting deformation of the second time is 55%, the upsetting deformation of the third time is 45%, and performing surface grinding treatment after air cooling to obtain a forging stock;
step two: heating the forging stock in the first step to 850 ℃, performing 2-fire two-pier two-drawing repeated pier drawing forging, wherein the first-pass pier drawing deformation is 55%, the second-pass pier drawing deformation is 50%, and performing surface grinding treatment after air cooling to obtain a rod blank;
step three: heating the rod blank obtained in the second step to 820 ℃, carrying out hot rolling, and carrying out surface grinding treatment after air cooling to obtain a wire rod with the diameter phi of 9.2 mm;
and step four, coating the surface of the wire rod obtained in the step three with emulsion, and then carrying out 4-pass bright cold drawing on a roller die wire drawing machine, wherein the diameters of the wire rod after each-pass roller die cold drawing are phi 8.6mm, phi 8.0mm, phi 7.4mm and phi 6.8mm respectively, and the drawing speed is controlled at 85m/min, so as to obtain the wire rod with phi 6.8 mm.
Step five: and (3) placing the wire rods obtained in the fourth step into a well annealing furnace for intermediate annealing, preserving heat at the temperature of 820 ℃ for 35min, cooling with water, and cleaning surface oxide skin and surface defects after cooling.
Step six: and (3) coating the emulsion on the surface of the wire rod obtained in the step (V), and carrying out 5-pass bright cold drawing on a roller die wire drawing machine, wherein the diameter of the wire rod after each-pass roller die cold drawing is respectively phi 6.2mm, phi 5.6mm, phi 5.0mm, phi 4.5mm and phi 4.0mm, and the drawing speed is controlled at 80m/min, so as to obtain the wire rod with the phi 4.0 mm.
Step seven: and D, annealing the wire rod obtained in the step six in a continuous annealing furnace filled with high-purity argon, wherein the annealing temperature is 780 ℃, and the wire rod travelling speed is 8m/min, so as to obtain the Ti45Nb titanium alloy straight wire rod with the phi of 4.0 mm.
Step eight: and D, vertically and electrically straightening the straight wire obtained in the step seven, wherein the heating temperature is 560 ℃.
The straightness of the Ti45Nb titanium alloy wires prepared by adopting the embodiment is 1.5mm/m, the diameter deviation is-0.01 mm, the ellipticity is 0.01mm, the surface roughness Ra is 0.6 mu m, the tensile strength under room temperature condition is 568MPa, the yield strength is 511MPa, the elongation is 24.6%, the area shrinkage is 80.2%, the shearing strength is 388MPa, the eddy current flaw detection is qualified, and the microstructure is shown in figure 2, thereby meeting the requirements of related technical standards.
Example 3
The method for preparing the Ti45Nb titanium alloy wires with the diameter of 2.5mm comprises the following steps:
step one: heating a Ti45Nb titanium alloy cast ingot with qualified chemical composition to 1050 ℃, performing two-pier two-drawing forging for 2 times, wherein the first-pass upsetting deformation is 55%, the second-pass upsetting deformation is 55%, and performing surface grinding treatment after air cooling to obtain a forging stock;
step two: heating the forging stock in the first step to 860 ℃, performing 3-fire two-pier two-drawing repeated pier drawing forging, wherein the first-pass pier drawing deformation is 45%, the second-pass pier drawing deformation is 50%, and performing surface grinding treatment after air cooling to obtain a rod blank;
step three: heating the rod blank obtained in the second step to 860 ℃, carrying out hot rolling, and carrying out surface grinding treatment after air cooling to obtain a wire rod with the diameter phi of 9.3 mm;
and step four, coating the surface of the wire rod obtained in the step three with emulsion, and carrying out 7-pass bright cold drawing on a roller die wire drawing machine, wherein the diameter of the wire rod after each-pass roller die cold drawing is phi 8.8mm, phi 8.0mm, phi 7.2mm, phi 6.5mm, phi 6.0mm, phi 5.5mm and phi 5.0mm respectively, and the drawing speed is controlled at 120m/min, so as to obtain the wire rod with the diameter of phi 5.0mm.
Step five: and (3) placing the wire rods obtained in the fourth step into a well annealing furnace for intermediate annealing, preserving heat at 800 ℃ for 45min, cooling with water, and cleaning surface oxide skin and surface defects after cooling.
Step six: and (3) coating the emulsion on the surface of the wire rod obtained in the step (V), and then carrying out 6-pass bright cold drawing on a roller die wire drawing machine, wherein the diameter of the wire rod after each-pass roller die cold drawing is respectively phi 4.5mm, phi 4.0mm, phi 3.6mm, phi 3.2mm, phi 2.8mm and phi 2.5mm, and the drawing speed is controlled at 100m/min, so as to obtain the wire rod with the phi 2.5mm.
Step seven: and D, annealing the wire rod obtained in the step six in a continuous annealing furnace filled with high-purity argon, wherein the annealing temperature is 750 ℃, and the wire rod travelling speed is 8m/min, so as to obtain the Ti45Nb titanium alloy straight wire rod with the diameter of phi 2.5mm.
Step eight: and D, vertically and electrically straightening the straight wire obtained in the step seven, wherein the heating temperature is 550 ℃.
The straightness of the Ti45Nb titanium alloy wires prepared by adopting the embodiment is 1.0mm/m, the diameter deviation is-0.01 mm, the ellipticity is 0.01mm, the surface roughness Ra is 0.5 mu m, the tensile strength under the room temperature condition is 552MPa, the yield strength is 515MPa, the elongation is 22.8%, the area shrinkage is 77.4%, the shearing strength is 378MPa, the eddy current flaw detection is qualified, the microstructure is shown in figure 3, and the requirements of related technical standards are met.
The Ti45Nb titanium alloy straight wire prepared by the method provided by the invention is simple to operate, stable and controllable in process, less than or equal to 2.0mm/m in straightness, less than or equal to 0.02mm in ovality, less than or equal to 1.0 mu m in surface roughness Ra, uniform and fine in microstructure, qualified in eddy current flaw detection, high in room temperature mechanical property consistency and stability in an annealed state, and capable of meeting the requirements of related standards.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. A processing method of a Ti45Nb titanium alloy straight wire comprises the following steps:
1) Heating the Ti45Nb titanium alloy cast ingot with qualified components to 1000-1150 ℃, cogging, forging and air cooling to obtain a forging stock;
2) Heating the forging stock to 800-900 ℃, upsetting, forging and air cooling to obtain a rod blank;
3) Heating the rod blank to 800-900 ℃ for hot rolling, and air cooling to obtain a wire rod with the diameter phi of 9.0-phi 10.0 mm;
4) After coating the surface of the wire rod with a lubricant, carrying out multi-pass bright cold drawing to obtain a wire rod;
5) Performing intermediate annealing treatment on the wire rod of the disc coil obtained in the step 4), and cleaning surface oxide skin after water cooling;
6) After the lubricant is coated again, carrying out multi-pass bright cold drawing to obtain a wire rod;
7) And (3) carrying out argon filling on-line continuous annealing treatment on the wire rod of the disc coil obtained in the step (6) to obtain a straight wire rod, and then carrying out vertical electric straightening to obtain the Ti45Nb titanium alloy straight wire rod.
2. The method according to claim 1, wherein in step 1), 1 to 2 times of hot cogging forging is performed; the forging pier drawing times of each firing time are not more than three piers and three drawing times;
the upsetting deformation of the cogging forging is controlled to be 45-60%.
3. The method according to claim 1, wherein the forging is performed by repeating the upsetting-drawing for 2 to 3 times in step 2); the forging pier drawing times of each firing time are not more than two piers and two drawing times;
the upsetting deformation of the upsetting forging is controlled to be 40-55%.
4. A method according to claim 1, wherein the diameter of the bar is Φ80.0mm to Φ100.0mm and the weight is 30.0 to 50.0kg.
5. The process according to claim 1, wherein the multi-pass bright cold drawing in step 4) is performed at a speed of 15 to 100m/min, with a deformation per drawing pass of less than 20%;
the speed of the multi-pass bright cold drawing in the step 6) is 20-150 m/min, and the deformation of each drawing pass is lower than 25%.
6. The process according to claim 1, wherein the intermediate annealing treatment in step 5) is performed at a temperature of 750 to 850 ℃ for a holding time of 30 to 60 minutes;
the temperature of the argon-filled online continuous annealing treatment in the step 7) is 700-850 ℃, and the travelling speed of the wire is 2-10 m/min.
7. The process according to claim 1, wherein the heating temperature for the vertical electrical straightening in step 7) is controlled between 500 and 600 ℃.
8. The method of claim 1, wherein the lubricant is a graphite emulsion lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311451029.7A CN117483473A (en) | 2023-11-02 | 2023-11-02 | Processing method of Ti45Nb titanium alloy straight wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311451029.7A CN117483473A (en) | 2023-11-02 | 2023-11-02 | Processing method of Ti45Nb titanium alloy straight wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117483473A true CN117483473A (en) | 2024-02-02 |
Family
ID=89675791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311451029.7A Pending CN117483473A (en) | 2023-11-02 | 2023-11-02 | Processing method of Ti45Nb titanium alloy straight wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117483473A (en) |
-
2023
- 2023-11-02 CN CN202311451029.7A patent/CN117483473A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110449541B (en) | GH4169 high-temperature alloy free forged bar blank and preparation method thereof | |
| CN104762576B (en) | The preparation method of TC18 titanium alloy the whole network basket tissue medium format overlength bar | |
| CN112981174B (en) | Preparation method of high-strength high-plasticity titanium alloy wire | |
| CN112676503B (en) | Forging processing method for TC32 titanium alloy large-size bar | |
| CN111534772A (en) | Preparation method of TC4 titanium alloy finished bar with short process and low cost | |
| CN111906225A (en) | Forging method of oversized Ti80 titanium alloy forging stock | |
| US20220126355A1 (en) | Method for forging niobium-tungsten alloy forged ring | |
| CN114657417B (en) | High-strength plastic titanium alloy suitable for cold deformation processing and preparation method thereof | |
| CN114161028A (en) | Processing method for improving performance of titanium alloy welding wire | |
| CN107282687B (en) | A kind of preparation method of Ti6Al4V titanium alloy fine grain bar | |
| CN105441713A (en) | A titanium alloy seamless tube and a manufacturing method thereof | |
| CN110923522A (en) | Method for forming high-performance wide-width aluminum alloy plate | |
| CN110976512A (en) | Cold rolling method for TC4 titanium alloy wire | |
| CN108580577A (en) | A kind of preparation method of the high-strength beta-titanium alloy silk material of spring | |
| CN117483473A (en) | Processing method of Ti45Nb titanium alloy straight wire | |
| CN111889535B (en) | Preparation method of zirconium alloy bar | |
| CN116532510A (en) | Preparation method for improving mechanical properties of TB13 titanium alloy wire for spectacle frame | |
| CN215916421U (en) | Golf club made of titanium alloy | |
| CN113523013B (en) | Production process of thick-wire-diameter titanium alloy wire | |
| CN112593114A (en) | Preparation method of high-performance Cu-Cr-Zr-Mg-Si alloy plate strip | |
| CN111519053A (en) | High-performance wide-width aluminum alloy plate shape forming method | |
| CN113305172B (en) | Preparation method of GH4169 alloy bar | |
| CN114871293B (en) | M50 bearing steel bar and preparation method thereof | |
| CN113444991B (en) | Titanium alloy golf club and preparation method of club body | |
| CN114273575B (en) | Large-deformation short-flow forging method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |