CN111705279A - Heat treatment method of Ti45Nb titanium alloy wire - Google Patents
Heat treatment method of Ti45Nb titanium alloy wire Download PDFInfo
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- CN111705279A CN111705279A CN202010505978.9A CN202010505978A CN111705279A CN 111705279 A CN111705279 A CN 111705279A CN 202010505978 A CN202010505978 A CN 202010505978A CN 111705279 A CN111705279 A CN 111705279A
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- titanium alloy
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- 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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- 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
Abstract
The invention relates to the technical field of titanium alloy heat treatment, and discloses a heat treatment method of a Ti45Nb titanium alloy wire, which comprises the following steps: placing Ti45Nb titanium alloy wires to be treated in a muffle furnace, heating to 750-860 ℃ for preheating, then preserving heat for 0.5-1.6 h, and then cooling to room temperature. According to the method, the preheating temperature, the heat preservation time and the cooling mode are controlled, so that the microstructure of the Ti45Nb titanium alloy wire subjected to heat treatment is uniform, the comprehensive mechanical properties such as tensile strength, yield strength, shear strength and elongation of the Ti45Nb titanium alloy wire are improved, and a good technical support is provided for the Ti45Nb titanium alloy wire applied to the production of aviation fasteners.
Description
Technical Field
The invention relates to the technical field of titanium alloy heat treatment, in particular to a heat treatment method of a Ti45Nb titanium alloy wire.
Background
With the improvement of the advancement of airplanes, the requirements on fastener materials are higher and higher, and titanium alloy with high weight reduction, corrosion resistance, non-magnetism and good compatibility with composite materials gradually becomes the first choice of advanced airplane fastener materials.
The Ti45Nb is an advanced material for aviation fasteners, has the density of only 5.7g/cm3, has excellent corrosion resistance, extremely high specific strength, good mechanical property and processability, and is suitable for manufacturing rivets for connecting composite materials. The Ti45Nb titanium alloy rivet is widely applied to various advanced military and civil aircrafts from the 80 th century in the United states, and the Ti45Nb titanium alloy rivet completely replaces pure titanium rivet. Meanwhile, the alloy is matched with Ti-6Al-4V titanium alloy to be made into a bimetal rivet which is widely used on boeing and airbus planes. At present, titanium-niobium rivets with excellent cold processing performance are all adopted in aerospace products in the United states.
In recent years, the quality of domestic Ti45Nb fasteners is unstable, the requirements on the tissue and mechanical property of wire materials are high, and the mechanical property of the wire materials for the fasteners can be greatly reduced due to the fact that the annealing temperature exceeds a certain temperature and crystal grains grow rapidly, so that ideal tissue and property matching is difficult to achieve, and the tissue and property can be guaranteed only by adopting a reasonable heat treatment process.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a heat treatment method for Ti45Nb titanium alloy wires, the Ti45Nb titanium alloy wires treated by the method have uniform internal tissues and greatly improved mechanical properties, and the internal tissues and the mechanical properties of the wires are well matched.
In order to achieve the above object, a first aspect of the present invention provides a heat treatment method of a Ti45Nb titanium alloy wire, the method comprising the steps of: placing Ti45Nb titanium alloy wires to be treated in a muffle furnace, heating to 750-860 ℃ for preheating, then preserving heat for 0.5-1.6 h, and then cooling to room temperature.
Preferably, the Ti45Nb titanium alloy wire to be treated is manufactured by a rotary swaging process.
Preferably, the preheating temperature is 750-850 ℃, and the heat preservation time is 0.5-1.5 h.
Preferably, the preheating temperature is 780-850 ℃, and the heat preservation time is 0.8-1.5 h.
Preferably, the chemical compositions of the Ti45Nb titanium alloy wire to be treated are as follows, wherein the total weight of the Ti45Nb titanium alloy wire to be treated is 100 percent: 44.32-47.75% of Nb, 0.01-0.21% of C, less than or equal to 0.03% of Si, less than or equal to 0.03% of Fe, less than or equal to 0.02% of Cr, less than or equal to 0.01% of Mg, less than or equal to 0.01% of Mn, 0.08-0.15% of O, 0.02-0.028% of N, less than or equal to 0.0012% of H and the balance of Ti.
Preferably, the diameter of the Ti45Nb titanium alloy wire to be processed is 2-5 mm.
Preferably, the diameter of the Ti45Nb titanium alloy wire to be treated is 2.1-4.9 mm.
Preferably, the muffle is a box furnace, a tube furnace or a crucible furnace.
Preferably, the cooling mode is air cooling.
The second aspect of the invention provides the application of the method in preparing Ti45Nb titanium alloy wire.
According to the heat treatment method of the Ti45Nb titanium alloy wire, the microstructure of the Ti45Nb titanium alloy wire subjected to heat treatment is uniform by controlling the preheating temperature, the heat preservation time and the cooling mode, the comprehensive mechanical properties of the Ti45Nb titanium alloy wire such as tensile strength, yield strength, shear strength, elongation and the like are improved, and a good technical support is provided for the Ti45Nb titanium alloy wire applied to the production of aviation fasteners.
Drawings
FIG. 1 is a microstructure diagram of example 1 of the present invention;
FIG. 2 is a microstructure diagram of example 2 of the present invention;
FIG. 3 is a microstructure diagram of example 3 of the present invention;
FIG. 4 is a microstructure diagram of example 4 of the present invention;
FIG. 5 is a microstructure diagram of example 5 of the present invention;
FIG. 6 is a microstructure diagram of comparative example 1 of the present invention;
FIG. 7 is a microstructure diagram of comparative example 2 of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The invention provides a heat treatment method of a Ti45Nb titanium alloy wire, which comprises the following steps: placing Ti45Nb titanium alloy wires to be treated in a muffle furnace, heating to 750-860 ℃ for preheating, then preserving heat for 0.5-1.6 h, and then cooling to room temperature.
In the method, the Ti45Nb titanium alloy wire to be treated is manufactured by a rotary swaging process. The rotary swaging processing technology has low cost, convenient maintenance, installation and debugging and good surface quality of the rotary swaged wires.
Under the preferable condition, the preheating temperature is 750-850 ℃, and the heat preservation time is 0.5-1.5 h. Specifically, the preheating temperature may be 750 ℃, 760 ℃, 770 ℃, 780 ℃, 790 ℃, 800 ℃, 810 ℃, 820 ℃, 830 ℃, 840 ℃ or 850 ℃. Specifically, the heat preservation time can be 0.5h, 0.6h, 0.7h, 0.8h, 0.9h, 1h, 1.1h, 1.2h, 1.3h, 1.4h or 1.5 h.
In the method, the chemical compositions of the Ti45Nb titanium alloy wire to be treated are as follows, wherein the total weight of the Ti45Nb titanium alloy wire to be treated is 100 percent: 44.32-47.75% of Nb, 0.01-0.21% of C, less than or equal to 0.03% of Si, less than or equal to 0.03% of Fe, less than or equal to 0.02% of Cr, less than or equal to 0.01% of Mg, less than or equal to 0.01% of Mn, 0.08-0.15% of O, 0.02-0.028% of N, less than or equal to 0.0012% of H and the balance of Ti.
In the method, the diameter of the Ti45Nb titanium alloy wire to be processed is 2-5 mm. Preferably, the diameter of the Ti45Nb titanium alloy wire to be treated is 2.1-4.9 mm. Specifically, the diameter of the Ti45Nb titanium alloy wire to be processed may be 2.1mm, 2.5mm, 3mm, 3.5mm, 3.9mm, 4mm, 4.5mm or 4.9 mm.
In the method of the invention, the muffle furnace is a box furnace, a tube furnace or a crucible furnace. In particular, it may be, for example, a box muffle.
In the method of the present invention, the cooling mode is air cooling. The wire material is cooled in the air, the operation is simple, the heat treatment time can be effectively shortened on the premise of ensuring the excellent internal tissue structure and mechanical property of the wire material, and the processing cost is reduced.
The second aspect of the invention provides the application of the method in preparing Ti45Nb titanium alloy wire.
According to the heat treatment method of the Ti45Nb titanium alloy wire, the preheating temperature, the heat preservation time and the cooling mode are adjusted, so that the microstructure structure of the Ti45Nb titanium alloy wire after heat treatment is uniform, the comprehensive mechanical properties such as tensile strength, yield strength, shear strength, elongation and the like of the Ti45Nb titanium alloy wire are improved, the internal structure and the mechanical properties of the wire are well matched, and a good technical support is provided for the Ti45Nb titanium alloy wire to be applied to the production of aviation fasteners.
The present invention will be described in detail below by way of examples, but the scope of the present invention is not limited thereto.
The same Ti45Nb titanium alloy wire is used for heat treatment in the examples and the comparative examples, the Ti45Nb titanium alloy wire to be treated is prepared by a rotary swaging process, and the chemical composition of the Ti45Nb titanium alloy wire to be treated is as follows based on 100 percent of the total weight of the Ti45Nb titanium alloy wire to be treated: 44.32-47.75% of Nb, 0.01-0.21% of C, less than or equal to 0.03% of Si, less than or equal to 0.03% of Fe, less than or equal to 0.02% of Cr, less than or equal to 0.01% of Mg, less than or equal to 0.01% of Mn, 0.08-0.15% of O, 0.02-0.028% of N, less than or equal to 0.0012% of H and the balance of Ti.
Examples 1 to 5 and comparative examples 1 to 2
Placing the Ti45Nb titanium alloy wire to be treated, which is obtained by rotary swaging and has the diameter of 3.9mm, in a box-type muffle furnace, heating to a preheating temperature, then preserving heat, and cooling to room temperature in air;
the values of the preheating temperature and the holding time of each example and comparative example are shown in Table 1.
TABLE 1
| Example numbering | Preheating temperature (. degree.C.) | Incubation time (h) |
| Example 1 | 750 | 1.5 |
| Example 2 | 780 | 1.3 |
| Example 3 | 810 | 1.1 |
| Example 4 | 830 | 1 |
| Example 5 | 850 | 0.5 |
| Comparative example 1 | 880 | 1 |
| Comparative example 2 | 830 | 3 |
Test example 1
The microstructures of examples 1-5 and comparative examples 1-2 were examined by the method described in national Standard GB/T5168-.
Test example 2
The room temperature mechanical property test was carried out on examples 1 to 5 and comparative examples 1 to 2 according to the method described in national standard GB/T228.1-2010, and the test results are shown in Table 2.
TABLE 2
As can be seen from the results of FIGS. 1 to 7, the microstructure of the Ti45Nb titanium alloy wire heat-treated according to the present invention was uniform and had grains, wherein the microstructure of example 4 was the most fine and uniform.
As can be seen from the results in Table 2, the tensile strength, yield strength, shear strength, elongation and reduction of area of examples 1-5 all meet the production requirements, with example 4 having the best overall performance. The elongation of the wire in comparative examples 1 and 2 is less than 10% because the heating temperature of the internal structure of the wire is too high or the holding time is too long, so that the grains of the internal structure are coarse, and the plasticity is reduced.
The above examples illustrate that the internal structure and mechanical properties of the Ti45Nb titanium alloy wire after heat treatment by the method of the invention are well matched.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. A heat treatment method for a Ti45Nb titanium alloy wire, characterized by comprising the following steps: placing Ti45Nb titanium alloy wires to be treated in a muffle furnace, heating to 750-860 ℃ for preheating, then preserving heat for 0.5-1.6 h, and then cooling to room temperature.
2. The method for heat treating the Ti45Nb titanium alloy wire according to claim 1, wherein the Ti45Nb titanium alloy wire to be treated is made by a rotary swaging process.
3. The heat treatment method of the Ti45Nb titanium alloy wire according to claim 1, wherein the preheating temperature is 750-850 ℃ and the holding time is 0.5-1.5 h.
4. The heat treatment method of the Ti45Nb titanium alloy wire according to claim 3, wherein the preheating temperature is 780-850 ℃ and the holding time is 0.8-1.5 h.
5. The heat treatment method of the Ti45Nb titanium alloy wire according to claim 1, wherein the chemical composition of the Ti45Nb titanium alloy wire to be treated is as follows, based on 100% by weight of the Ti45Nb titanium alloy wire to be treated: 44.32-47.75% of Nb, 0.01-0.21% of C, less than or equal to 0.03% of Si, less than or equal to 0.03% of Fe, less than or equal to 0.02% of Cr, less than or equal to 0.01% of Mg, less than or equal to 0.01% of Mn, 0.08-0.15% of O, 0.02-0.028% of N, less than or equal to 0.0012% of H and the balance of Ti.
6. The heat treatment method of the Ti45Nb titanium alloy wire according to claim 1, wherein the diameter of the Ti45Nb titanium alloy wire to be treated is 2-5 mm.
7. The heat treatment method of the Ti45Nb titanium alloy wire according to claim 6, wherein the diameter of the Ti45Nb titanium alloy wire to be treated is 2.1-4.9 mm.
8. The method for heat treating a Ti45Nb titanium alloy wire according to claim 1, wherein the muffle is a box furnace, a tube furnace or a crucible furnace.
9. The method for heat-treating a Ti45Nb titanium alloy wire according to claim 1, wherein the cooling is air cooling.
10. Use of the method of any one of claims 1 to 9 in the preparation of Ti45Nb titanium alloy wire.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63143300A (en) * | 1986-12-05 | 1988-06-15 | Nippon Mining Co Ltd | Method and device for recovering valuable metal from copper-coated metallic wire |
| US20020162608A1 (en) * | 1999-01-07 | 2002-11-07 | Lin Jiin-Huey Chern | Medical implant made of biocompatible low modulus high strength titanium-niobium alloy and method of using the same |
| CN102513479A (en) * | 2011-11-18 | 2012-06-27 | 宝鸡市金盛伟业稀有金属有限公司 | Production process for large-diameter fine isometric crystal tissue titanium alloy bar |
| CN102703757A (en) * | 2012-05-18 | 2012-10-03 | 宁夏东方钽业股份有限公司 | Corrosion resistant niobium-titanium alloy, and method for manufacturing plates and pipes with the same |
| CN107282688A (en) * | 2017-07-25 | 2017-10-24 | 西部超导材料科技股份有限公司 | A kind of Ti45Nb alloy discs justify the preparation method of silk material |
| CN109127749A (en) * | 2018-08-24 | 2019-01-04 | 成都先进金属材料产业技术研究院有限公司 | The drawing lubrication method of titanium niobium silk material |
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2020
- 2020-06-05 CN CN202010505978.9A patent/CN111705279A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63143300A (en) * | 1986-12-05 | 1988-06-15 | Nippon Mining Co Ltd | Method and device for recovering valuable metal from copper-coated metallic wire |
| US20020162608A1 (en) * | 1999-01-07 | 2002-11-07 | Lin Jiin-Huey Chern | Medical implant made of biocompatible low modulus high strength titanium-niobium alloy and method of using the same |
| CN102513479A (en) * | 2011-11-18 | 2012-06-27 | 宝鸡市金盛伟业稀有金属有限公司 | Production process for large-diameter fine isometric crystal tissue titanium alloy bar |
| CN102703757A (en) * | 2012-05-18 | 2012-10-03 | 宁夏东方钽业股份有限公司 | Corrosion resistant niobium-titanium alloy, and method for manufacturing plates and pipes with the same |
| CN107282688A (en) * | 2017-07-25 | 2017-10-24 | 西部超导材料科技股份有限公司 | A kind of Ti45Nb alloy discs justify the preparation method of silk material |
| CN109127749A (en) * | 2018-08-24 | 2019-01-04 | 成都先进金属材料产业技术研究院有限公司 | The drawing lubrication method of titanium niobium silk material |
Non-Patent Citations (2)
| Title |
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| 胡隆伟等: "《紧固件材料手册》", 31 December 2014, 中国宇航出版社 * |
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