CN115156332A - Processing method of titanium alloy capillary tube - Google Patents

Processing method of titanium alloy capillary tube Download PDF

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Publication number
CN115156332A
CN115156332A CN202210854671.9A CN202210854671A CN115156332A CN 115156332 A CN115156332 A CN 115156332A CN 202210854671 A CN202210854671 A CN 202210854671A CN 115156332 A CN115156332 A CN 115156332A
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titanium alloy
ingot
titanium
capillary tube
processing
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CN202210854671.9A
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Chinese (zh)
Inventor
刘帅良
宫增祥
彭飞
侯亚天
刘慧选
鲍龙君
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Hebei Outong None Ferrous Metal Products Co ltd
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Hebei Outong None Ferrous Metal Products Co ltd
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    • 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
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • 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
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/085—Making tubes
    • 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
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied
    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C14/00—Alloys based on titanium
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention discloses a processing method of a titanium alloy capillary tube, which comprises the following steps: the method comprises the following steps: titanium alloy ingot casting material, step two: re-measuring the actual content of the oxygen content in the titanium alloy material; step three: casting a titanium alloy ingot; step four: carrying out homogenization treatment on the titanium alloy ingot, and then sawing according to the weight of a finished product; step five: peeling a titanium alloy ingot, cutting off a riser and an ingot bottom, and feeding the ingot into a heating furnace for heating; step six: feeding the heated titanium alloy ingot into an extruder for perforation extrusion; step seven: placing the extruded titanium alloy pipe into a pipe drawing machine for drawing; step eight: when the pipe is drawn to a diameter smaller than 10mm, performing heat treatment, recovering plasticity, and rolling; step nine: sending the coiled pipe into a coil drawing machine to continue drawing until the size of a finished product is reached; step ten: and (6) packaging. The invention adopts an innovative fusion casting process to process the product, thereby improving the product quality.

Description

Processing method of titanium alloy capillary tube
Technical Field
The invention relates to the field of nonferrous metal processing, in particular to a processing method of a titanium alloy capillary tube.
Background
The tube with a very small inner diameter is called a capillary tube. Generally, a capillary tube having an inner diameter of 1 mm or less is called a capillary tube because the tube diameter is thin like hair. Titanium and titanium alloys are structural materials with extremely high specific strength, good corrosion resistance, excellent heat resistance and non-toxic and non-magnetic properties. Because of its excellent strength and corrosion resistance, titanium alloy capillaries have become increasingly popular for use in high-end advanced precision medical devices. However, the existing titanium alloy capillary tube production process of most manufacturers has the problems of low quality stability and low product yield.
Disclosure of Invention
In view of the above, the present invention provides a method for processing a titanium alloy capillary to solve the above problems in the prior art.
In order to solve the problems, the technical scheme of the invention is as follows:
a processing method of a titanium alloy capillary tube comprises the following steps:
the method comprises the following steps: selecting titanium sponge with the content of 99.5 percent as a raw material for a titanium alloy ingot casting material, fully melting the titanium alloy, adding phosphorus element, and performing a deoxidation step;
step two: re-measuring the actual content of the oxygen content in the titanium alloy material;
step three: after the detected material completely reaches the standard, casting a titanium alloy ingot;
step four: homogenizing a titanium alloy ingot, keeping the temperature at 800-1000 ℃ for 8-12 h, cooling by air, and then sawing according to the weight of a finished product;
step five: peeling a titanium alloy ingot, cutting off a riser and an ingot bottom, and feeding the ingot into a heating furnace for heating;
step six: feeding the heated titanium alloy ingot into an extruder for perforation extrusion;
step seven: placing the extruded titanium alloy pipe into a pipe drawing machine for drawing;
step eight: when the pipe is drawn to a diameter smaller than 10mm, carrying out heat treatment, recovering plasticity, and rolling;
step nine: sending the coiled pipe into a coil drawing machine to continue drawing until the size of a finished product is reached;
step ten: and packaging the coiled and drawn titanium alloy capillary tube.
Further, in the first step, the titanium-based alloy conforms to GB/T2524-2019 high-purity sponge titanium, the titanium purity can reach 99.5%, the sponge titanium material is put into a feeding mechanism of a vacuum electron beam melting furnace, after the sponge titanium material enters the electron beam melting furnace, electron beam refining is carried out, and the titanium ingot is formed through cooling and solidification, wherein the diameter of the titanium ingot is 145-440 mm.
Further, after the first step is completed, actual component detection needs to be performed on the cast titanium alloy ingot, because the material is subjected to melting loss at high temperature, the actual content is different from the content added in proportion in the early stage, and after the actual detection is performed, material proportioning can be performed more clearly in the subsequent processing links.
And further, between the first step and the second step, detecting the titanium alloy ingot and analyzing the titanium content, the oxygen content, the grain size and the content of various impurities.
Further, after each step is completed, the material ingot should be subjected to surface quality inspection and internal flaw detection inspection, and the quality problems detected are corrected.
Further, in the first step, V, al, ru, fe, cr and Zr are added in addition to the titanium sponge, and the mass fractions are as follows: 80 parts of sponge titanium, 10 parts of Cr, 10 parts of Zr, 6 parts of V, 3 parts of Al, 3 parts of Ru and 2 parts of Fe.
Furthermore, in the second step, the impurities of the main components and the trace elements are accurately detected by using a chemical method and a spectroscopic method respectively, so that the material defect caused by the overproof of the trace elements is avoided.
Furthermore, in the third step, the casting needs to be carried out in a constant temperature environment, and due to the special material, the cooling strength needs to be adjusted in time according to the casting speed in the casting process, so that the phenomenon that air holes and faults appear inside and outside the cast ingot due to uneven cooling strength is avoided.
And further, in the sixth step, polishing and lubricating a tool used for perforating to ensure that the perforating is uniform and stable, and spraying a thermal barrier coating on the cast ingot.
Further, in the seventh step, heat treatment is performed once every three to four times to restore the plasticity of the material, so as to avoid breaking.
Compared with the prior art, the method has the advantages that,
1. the invention adds a chemical method and a spectral method to exactly detect the impurities of the main components and the trace elements, thereby avoiding the material defect caused by the overproof trace elements; in the sixth step, polishing and lubricating tools used for perforating are required to ensure that the perforation is uniform and stable; in the seventh step, heat treatment is carried out once every three to four times to restore the plasticity of the material, so as to avoid tensile fracture; the product quality is improved;
2. the invention carries out casting in a constant temperature environment, and because the material is special, the cooling strength needs to be adjusted in time according to the casting speed in the casting process, thereby avoiding air holes and faults inside and outside the cast ingot caused by uneven cooling strength and further improving the product quality.
3. Furthermore, the invention adds V, cr, al and other metal elements into the titanium alloy capillary in the non-medical field, so that the oxidation resistance of the product is greatly enhanced, the oxide layer is compact, the product is not easy to fall off in the hot working process, and the surface quality is good after the heat treatment. The added beta stabilizing elements such as V, cr and the like enable the beta phase structure to be kept without water cooling in the solution treatment, and the method has the advantages of simple heat treatment process, lower cost and convenient application.
Detailed description of the invention
Medical titanium alloy capillary embodiments
The method comprises the following steps:
the method comprises the following steps: titanium alloy ingot casting materials, namely selecting sponge titanium with the content of 99.5% as a raw material, fully melting the titanium alloy, adding phosphorus, and performing a deoxidation step;
step two: re-measuring the actual content of the oxygen content in the titanium alloy material;
step three: after the detected material completely reaches the standard, casting a titanium alloy ingot;
step four: homogenizing a titanium alloy ingot, keeping the temperature at 900 ℃ for 10h, cooling the titanium alloy ingot by air, and then sawing according to the weight of a finished product;
step five: peeling a titanium alloy ingot, cutting off a riser and an ingot bottom, and feeding the ingot into a heating furnace for heating;
step six: feeding the heated titanium alloy ingot into an extruder for perforation extrusion;
step seven: placing the extruded titanium alloy pipe into a pipe drawing machine for drawing;
step eight: when the pipe is drawn to a diameter smaller than 10mm, performing heat treatment, recovering plasticity, and rolling;
step nine: sending the coiled pipe into a coil drawing machine to continue drawing until the size of a finished product is reached;
step ten: and packaging the coiled and drawn titanium alloy capillary tube.
Further, in the first step, the titanium-based alloy conforms to GB/T2524-2019 high-purity sponge titanium, the titanium purity can reach 99.5%, the sponge titanium material is put into a feeding mechanism of a vacuum electron beam melting furnace, after the sponge titanium material enters the electron beam melting furnace, electron beam refining is carried out, and the titanium ingot is formed through cooling and solidification, wherein the diameter of the titanium ingot is 145-440 mm.
Furthermore, after the first step is finished, actual component detection needs to be carried out on the cast titanium alloy ingot, because the material is subjected to melting loss at high temperature, the actual content is different from the content added in proportion in the early stage, and after actual detection, material proportioning can be carried out more clearly in subsequent processing links.
And further, between the first step and the second step, detecting the titanium alloy ingot and analyzing the titanium content, the oxygen content, the grain size and the content of various impurities.
Further, after each step is completed, the material ingot should be subjected to surface quality inspection and internal flaw detection inspection, and the inspected quality problems are corrected.
Furthermore, in the second step, the impurities of the main components and the trace elements are accurately detected by using a chemical method and a spectroscopic method respectively, so that the material defect caused by the overproof of the trace elements is avoided.
Furthermore, in the third step, the casting needs to be carried out in a constant temperature environment, and due to the special material, the cooling strength needs to be adjusted in time according to the casting speed in the casting process, so that the phenomenon that air holes and faults appear inside and outside the cast ingot due to uneven cooling strength is avoided.
Further, in the sixth step, polishing and lubricating tools used for perforating are required to ensure that the perforation is uniform and stable, and thermal barrier coatings are sprayed on the cast ingots.
Further, in the seventh step, heat treatment is performed once every three to four times to restore the plasticity of the material, so as to avoid breaking.
Non-medical titanium alloy capillary embodiments
The method comprises the following steps:
the method comprises the following steps: the titanium alloy ingot casting material is prepared by selecting 99.5% sponge titanium as a raw material, and adding V, al, ru, fe, cr and Zr, wherein the mass fraction of the sponge titanium is as follows: 80 parts of sponge titanium, 10 parts of Cr, 10 parts of Zr, 6 parts of V, 3 parts of Al, 3 parts of Ru and 2 parts of Fe, fully melting, adding phosphorus element, and performing a deoxidation step;
step two: re-measuring the actual content of the oxygen content in the titanium alloy material;
step three: after the detected material completely reaches the standard, casting a titanium alloy ingot;
step four: homogenizing a titanium alloy ingot, keeping the temperature at 900 ℃ for 10 hours, cooling by air, and then sawing according to the weight of a finished product;
step five: peeling a titanium alloy ingot, cutting off a riser and an ingot bottom, and feeding the ingot into a heating furnace for heating;
step six: feeding the heated titanium alloy ingot into an extruder for perforation extrusion;
step seven: placing the extruded titanium alloy pipe into a pipe drawing machine for drawing;
step eight: when the pipe is drawn to a diameter smaller than 10mm, performing heat treatment, recovering plasticity, and rolling;
step nine: sending the coiled pipe into a coil drawing machine to continue drawing until the size of a finished product is reached;
step ten: and packaging the coiled and drawn titanium alloy capillary tube.
Further, in the first step, the titanium-based alloy conforms to GB/T2524-2019 high-purity sponge titanium, the titanium purity can reach 99.5%, the sponge titanium material is put into a feeding mechanism of a vacuum electron beam melting furnace, after the sponge titanium material enters the electron beam melting furnace, electron beam refining is carried out, and the titanium ingot is formed through cooling and solidification, wherein the diameter of the titanium ingot is 145-440 mm.
Further, after the first step is completed, actual component detection needs to be performed on the cast titanium alloy ingot, because the material is subjected to melting loss at high temperature, the actual content is different from the content added in proportion in the early stage, and after the actual detection is performed, material proportioning can be performed more clearly in the subsequent processing links.
And further, between the first step and the second step, detecting the titanium alloy ingot and analyzing the titanium content, the oxygen content, the grain size and the content of various impurities.
Further, after each step is completed, the material ingot should be subjected to surface quality inspection and internal flaw detection inspection, and the inspected quality problems are corrected.
Furthermore, in the second step, the impurities of the main components and the trace elements are accurately detected by using a chemical method and a spectroscopic method respectively, so that the material defect caused by the overproof of the trace elements is avoided.
Furthermore, in the third step, the casting needs to be carried out in a constant temperature environment, and due to the special material, the cooling strength needs to be adjusted in time according to the casting speed in the casting process, so that the phenomenon that air holes and faults appear inside and outside the cast ingot due to uneven cooling strength is avoided.
Further, in the sixth step, polishing and lubricating tools used for perforating are required to ensure that the perforation is uniform and stable, and thermal barrier coatings are sprayed on the cast ingots.
Further, in the seventh step, heat treatment is performed once every three to four times to restore the plasticity of the material, so as to avoid tensile failure.
Examples of the experiments
Experimental example 1 is the non-medical titanium alloy capillary obtained in example;
comparative example 1 is a titanium alloy capillary tube manufactured by some metal product limited in Jiangxi;
the comparative example 2 is a titanium alloy capillary tube produced by Shenzhen special copper manufacturing Limited.
The performance detection is carried out on three groups of experimental examples according to the standards and test methods of GB/T3620.1-2016 and GB/T3620.2-2007.
Figure BDA0003749681700000081
As can be seen from the above table, the surface damage of the titanium alloy capillary tube of the present example is the best, and the tensile strength, hardness, and corrosion resistance are also the best.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention.

Claims (10)

1. A processing method of a titanium alloy capillary tube is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: selecting titanium sponge with the content of 99.5 percent as a raw material for a titanium alloy ingot casting material, fully melting the titanium alloy, adding phosphorus element, and performing a deoxidation step;
step two: re-measuring the actual content of the oxygen content in the titanium alloy material;
step three: after the detected material completely reaches the standard, casting a titanium alloy ingot;
step four: homogenizing a titanium alloy ingot, keeping the temperature at 800-1000 ℃ for 8-12 h, cooling by air, and then sawing according to the weight of a finished product;
step five: peeling a titanium alloy ingot, cutting off a riser and an ingot bottom, and feeding the ingot into a heating furnace for heating;
step six: feeding the heated titanium alloy ingot into an extruder for perforation extrusion;
step seven: placing the extruded titanium alloy pipe into a pipe drawing machine for drawing;
step eight: when the pipe is drawn to a diameter smaller than 10mm, performing heat treatment, recovering plasticity, and rolling;
step nine: sending the coiled pipe into a coil drawing machine to continue drawing until the size of a finished product is reached;
step ten: and packaging the coiled and drawn titanium alloy capillary tube.
2. The method for processing a titanium alloy capillary tube according to claim 1, wherein: in the first step, the titanium-based alloy conforms to GB/T2524-2019 high-purity titanium sponge, the titanium purity can reach 99.5%, the titanium sponge material is put into a feeding mechanism of a vacuum electron beam melting furnace, after the titanium sponge material enters the electron beam melting furnace, electron beam refining is carried out, and the titanium ingot is formed through cooling and solidification, wherein the diameter of the titanium ingot is 145-440 mm.
3. The method for processing the titanium alloy capillary tube according to claim 1, wherein: after the first step is finished, the actual component detection needs to be carried out on the cast titanium alloy ingot, because the material is subjected to melting loss at high temperature, the actual content is different from the content added in proportion in the early stage, and after the actual detection is carried out, the material proportioning can be carried out more clearly in the subsequent processing links.
4. The method for processing the titanium alloy capillary tube according to claim 1, wherein: and between the first step and the second step, detecting the titanium alloy ingot and analyzing the titanium content, the oxygen content, the grain size and the content of various impurities.
5. The method for processing the titanium alloy capillary tube according to claim 1, wherein: and after each step is finished, performing surface quality inspection and internal flaw detection on the material cast ingot, and repairing the inspected quality problem.
6. The method for processing the titanium alloy capillary tube according to claim 1, wherein: in the first step, V, al, ru, fe, cr and Zr are added besides the titanium sponge, and the mass fraction is as follows: 80 parts of sponge titanium, 10 parts of Cr, 10 parts of Zr, 6 parts of V, 3 parts of Al, 3 parts of Ru and 2 parts of Fe.
7. The method for processing the titanium alloy capillary tube according to claim 1, wherein: in the second step, the impurities of the main components and the trace elements are accurately detected by using a chemical method and a spectroscopic method respectively, so that the material defect caused by the overproof of the trace elements is avoided.
8. The method for processing the titanium alloy capillary tube according to claim 1, wherein: in the third step, the casting needs to be carried out in a constant temperature environment, and due to the special material, the cooling strength needs to be adjusted in time according to the casting speed in the casting process, so that the phenomenon that air holes and faults appear inside and outside the cast ingot due to uneven cooling strength is avoided.
9. The method for processing the titanium alloy capillary tube according to claim 1, wherein: and in the sixth step, polishing and lubricating a tool used for perforating to ensure that the perforation is uniform and stable, and spraying a thermal barrier coating on the cast ingot.
10. The method for processing a titanium alloy capillary tube according to claim 1, wherein: in the seventh step, heat treatment is carried out once every three to four times to recover the plasticity of the material and avoid tensile failure.
CN202210854671.9A 2022-07-17 2022-07-17 Processing method of titanium alloy capillary tube Pending CN115156332A (en)

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Application Number Priority Date Filing Date Title
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Publications (1)

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