CN113862591A - Heat treatment method for improving comprehensive mechanical property of TB15 titanium alloy - Google Patents
Heat treatment method for improving comprehensive mechanical property of TB15 titanium alloy Download PDFInfo
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- CN113862591A CN113862591A CN202111103062.1A CN202111103062A CN113862591A CN 113862591 A CN113862591 A CN 113862591A CN 202111103062 A CN202111103062 A CN 202111103062A CN 113862591 A CN113862591 A CN 113862591A
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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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- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
A heat treatment method for improving comprehensive mechanical properties of a TB15 titanium alloy is characterized in that a TB15 titanium alloy part is subjected to triple-cycle heat treatment to improve the comprehensive mechanical properties of the TB15 titanium alloy, the temperature is increased to 880-910 ℃ for the first time, the temperature is kept for 1.5-2 hours, and then the titanium alloy is taken out of a furnace and cooled by air; heating to 510-540 ℃ for the second time, preserving heat for 6-9 hours, and taking out of the furnace for air cooling; heating to 460-510 ℃ for the third time, preserving the heat for 1-4 hours, and taking out the product from the furnace for air cooling.
Description
Technical Field
The invention belongs to the technical field of material heat treatment, and particularly relates to a multiple heat treatment method for improving comprehensive mechanical properties of a TB15 titanium alloy.
Background
The metastable beta titanium alloy has high strength, high specific strength, fast hardening capacity and excellent damage tolerance performance, and may be used widely in aeronautics and astronautics, such as main landing gear, fastener and other parts with high mechanical performance requirement. After decades of development and application, the metastable beta titanium alloy has been widely applied to the fields of aviation, aerospace, electronics, medical instruments, sports goods and the like, and becomes an indispensable structural and functional material in the fields.
With the development of the international aviation industry, the combination property matching of the existing high-strength high-toughness titanium alloy still cannot completely meet the increasingly high weight reduction requirement in the aerospace field, and the research and development of the ultrahigh-strength titanium alloy with higher strength level are urgent. At present, solid solution and aging are main means for heat treatment strengthening of the metastable setting beta titanium alloy, and the development of a more appropriate heat treatment process is one of the keys for improving the comprehensive mechanical properties of the metastable setting beta titanium alloy.
Disclosure of Invention
In order to improve the comprehensive mechanical property of the TB15 titanium alloy, the invention provides a heat treatment method for improving the comprehensive mechanical property of the TB15 titanium alloy.
A heat treatment method for improving comprehensive mechanical properties of a TB15 titanium alloy is characterized by comprising the following steps: the comprehensive mechanical property of the TB15 titanium alloy is improved by carrying out multiple-cycle heat treatment on the TB15 titanium alloy part, and the method specifically comprises the following steps:
step 1: placing the TB15 titanium alloy in a heat treatment furnace for the first time to heat along with the furnace, then heating to 880-910 ℃, preserving heat for 1.5-2 hours, and then discharging from the furnace for air cooling;
step 2: placing the TB15 titanium alloy cooled in the step 1 in a heat treatment furnace for the second time to heat with the furnace, heating to 510-540 ℃, keeping the temperature for 6-9 hours, and then discharging from the furnace for air cooling;
and step 3: and (3) placing the TB15 titanium alloy cooled in the step (2) in a heat treatment furnace for the third time, heating the titanium alloy along with the furnace, raising the temperature to 460-510 ℃, keeping the temperature for 1-4 hours, and then discharging the titanium alloy out of the furnace for air cooling.
The beneficial effect of this application does:
the multiple heat treatment method well controls the tissue evolution process, effectively improves the comprehensive mechanical property of the TB15 titanium alloy, and the mechanical property test of the TB15 titanium alloy after heat treatment has the advantages that the elongation after fracture is 6.1-6.8%, the yield strength is 1250-1280 MPa, and the tensile strength is 1310-1340 MPa, which are improved compared with the comprehensive mechanical property of the TB15 titanium alloy produced by the traditional solid solution aging heat treatment.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
Step 1: placing the TB15 titanium alloy in a heat treatment furnace for the first time to heat along with the furnace, then heating to 900 ℃, keeping the temperature for 2 hours, and then discharging the titanium alloy from the furnace and cooling the titanium alloy to room temperature.
Step 2: and (3) placing the TB15 titanium alloy cooled in the step (1) in a heat treatment furnace for the second time, heating the titanium alloy along with the furnace, raising the temperature to 530 ℃, keeping the temperature for 8 hours, and then discharging the titanium alloy from the furnace and cooling the titanium alloy to room temperature by air.
And step 3: and (3) heating the cooled TB15 titanium alloy obtained in the step (2) to 480 ℃, preserving the heat for 1 hour, discharging the titanium alloy out of the furnace, and air-cooling the titanium alloy.
Example 2
Step 1: placing the TB15 titanium alloy in a heat treatment furnace for the first time to heat along with the furnace, then heating to 900 ℃, keeping the temperature for 2 hours, and then discharging the titanium alloy from the furnace and cooling the titanium alloy to room temperature.
Step 2: and (3) placing the TB15 titanium alloy cooled in the step (1) in a heat treatment furnace for the second time, heating the titanium alloy along with the furnace, raising the temperature to 530 ℃, keeping the temperature for 8 hours, and then discharging the titanium alloy from the furnace and cooling the titanium alloy to room temperature by air.
And step 3: and (3) heating the cooled TB15 titanium alloy obtained in the step (2) to 480 ℃, preserving the heat for 4 hours, discharging the titanium alloy out of the furnace, and air-cooling the titanium alloy.
Example 3
Step 1: placing the TB15 titanium alloy in a heat treatment furnace for the first time to heat along with the furnace, then heating to 900 ℃, keeping the temperature for 2 hours, and then discharging the titanium alloy from the furnace and cooling the titanium alloy to room temperature.
And 2, placing the TB15 titanium alloy cooled in the step 1 in a heat treatment furnace for the second time, heating the titanium alloy along with the furnace, raising the temperature to 530 ℃, keeping the temperature for 8 hours, and then discharging the titanium alloy from the furnace and cooling the titanium alloy to room temperature by air.
And step 3: and (3) heating the cooled TB15 titanium alloy obtained in the step (2) to 500 ℃, keeping the temperature for 1 hour, discharging the titanium alloy out of the furnace, and air-cooling the titanium alloy.
Claims (4)
1. A heat treatment method for improving comprehensive mechanical properties of a TB15 titanium alloy is characterized by comprising the following steps: the comprehensive mechanical property of the TB15 titanium alloy is improved by carrying out multiple-cycle heat treatment on the TB15 titanium alloy part, and the method specifically comprises the following steps:
step 1: placing the TB15 titanium alloy in a heat treatment furnace for the first time to heat along with the furnace, then heating to 880-910 ℃, preserving heat for 1.5-2 hours, and then discharging from the furnace for air cooling;
step 2: placing the TB15 titanium alloy cooled in the step 1 in a heat treatment furnace for the second time to heat with the furnace, heating to 510-540 ℃, keeping the temperature for 6-9 hours, and then discharging from the furnace for air cooling;
and step 3: and (3) placing the TB15 titanium alloy cooled in the step (2) in a heat treatment furnace for the third time, heating the titanium alloy along with the furnace, raising the temperature to 460-510 ℃, keeping the temperature for 1-4 hours, and then discharging the titanium alloy out of the furnace for air cooling.
2. The heat treatment method for improving the comprehensive mechanical property of the TB15 titanium alloy according to claim 1, wherein in step 1, the TB15 titanium alloy is placed in a heat treatment furnace for the first time to be heated with the furnace, then the temperature is raised to 900 ℃ and kept for 2 hours, and then the temperature is cooled to room temperature by air discharged from the furnace.
3. The heat treatment method for improving the comprehensive mechanical property of the TB15 titanium alloy according to claim 1, wherein in the step 2, the cooled TB15 titanium alloy is placed in the heat treatment furnace for the second time to be heated with the furnace, the temperature is increased to 530 ℃ and kept for 8 hours, and then the cooled TB15 titanium alloy is taken out of the furnace and cooled to room temperature.
4. The heat treatment method for improving the comprehensive mechanical property of the TB15 titanium alloy according to claim 1, wherein in the step 3, the cooled TB15 titanium alloy is placed in a heat treatment furnace for the third time to be heated along with the furnace, the temperature is increased to 480 ℃, the temperature is kept for 1 hour, and then the cooled air is discharged from the furnace and cooled to room temperature.
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| CN202111103062.1A CN113862591A (en) | 2021-09-18 | 2021-09-18 | Heat treatment method for improving comprehensive mechanical property of TB15 titanium alloy |
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| CN202111103062.1A CN113862591A (en) | 2021-09-18 | 2021-09-18 | Heat treatment method for improving comprehensive mechanical property of TB15 titanium alloy |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050257864A1 (en) * | 2004-05-21 | 2005-11-24 | Brian Marquardt | Metastable beta-titanium alloys and methods of processing the same by direct aging |
| WO2005123976A2 (en) * | 2004-06-10 | 2005-12-29 | Howmet Corporation | Near-beta titanium alloy heat treated casting |
| US20100065158A1 (en) * | 2008-09-18 | 2010-03-18 | Sheehan Kevin C | Solution heat treatment and overage heat treatment for titanium components |
| CN108588606A (en) * | 2018-05-24 | 2018-09-28 | 太原理工大学 | A kind of process of the high tough beta-titanium alloy crystal grain of rapid refinement |
| CN110923598A (en) * | 2019-12-05 | 2020-03-27 | 中国航发北京航空材料研究院 | Heat treatment process for improving toughness of nearly β type or metastable β type titanium alloy |
-
2021
- 2021-09-18 CN CN202111103062.1A patent/CN113862591A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050257864A1 (en) * | 2004-05-21 | 2005-11-24 | Brian Marquardt | Metastable beta-titanium alloys and methods of processing the same by direct aging |
| WO2005123976A2 (en) * | 2004-06-10 | 2005-12-29 | Howmet Corporation | Near-beta titanium alloy heat treated casting |
| US20100065158A1 (en) * | 2008-09-18 | 2010-03-18 | Sheehan Kevin C | Solution heat treatment and overage heat treatment for titanium components |
| CN108588606A (en) * | 2018-05-24 | 2018-09-28 | 太原理工大学 | A kind of process of the high tough beta-titanium alloy crystal grain of rapid refinement |
| CN110923598A (en) * | 2019-12-05 | 2020-03-27 | 中国航发北京航空材料研究院 | Heat treatment process for improving toughness of nearly β type or metastable β type titanium alloy |
Non-Patent Citations (2)
| Title |
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| 上海交通大学《金相分析》编写组 编: "《金相分析》", 30 April 1982 * |
| 李鸿江: "热加工对Ti-6554高强韧钛合金组织性能的影响研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
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Application publication date: 20211231 |