CN100575533C - A kind of heat treating process of titanium alloy in antivacuum furnace - Google Patents
A kind of heat treating process of titanium alloy in antivacuum furnace Download PDFInfo
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- CN100575533C CN100575533C CN200710189892A CN200710189892A CN100575533C CN 100575533 C CN100575533 C CN 100575533C CN 200710189892 A CN200710189892 A CN 200710189892A CN 200710189892 A CN200710189892 A CN 200710189892A CN 100575533 C CN100575533 C CN 100575533C
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Abstract
A kind of heat treating process of titanium alloy in antivacuum furnace, comprise and make thermal treatment casing, workpiece and pack that thermal treatment casing, heat treatment box vacuumize, thermal treatment four procedures into, utilize this technology can make titanium alloy component surface non-oxidation be the preceding true qualities of thermal treatment or slight golden yellow, the stress relieving of product is greater than more than 55%, and the mechanical performance index of product satisfies standard-required.The present invention is to the thermal treatment of annealing of б=20mm titanium alloy test piece for welding, and annealing process is incubated 90 minutes for being heated to 650 ℃, and air cooling is to room temperature.Adopt blind hole to survey to the test piece for welding before and after the thermal treatment and carry out welding residual stress mensuration, and mensuration is handled the tensile strength of front and back test piece for welding heat and the impelling strength of weld heat-affected zone, meet the requirements, having overcome producer does not have vacuum heat treatment furnace or be pilot to be unworthy using the needs of large titanium alloy vacuum oven, increased output, the heating-up time is fast, and the process-cycle is short, output has increased, reliable product quality.
Description
Technical field
The invention belongs to the heat-treatment of annealing technical field, especially a kind of heat treating process of titanium alloy in antivacuum furnace.
Background technology
Titanium alloy is a kind of material with excellent properties such as anti-corrosion, specific tenacity height, at present in industry widespread uses such as Aeronautics and Astronautics, naval vessel, chemical industry.There is bigger stress in a large amount of argosies with titanium alloy structure and goods in moulding processes such as forging and pressing, welding, the annealing operation that need heat-treat, because the Titanium Alloys at High Temperature chemically reactive is very strong, very easily with hydrogen, oxygen element reaction, the annealing of titanium alloy material is all carried out in vacuum oven under normal conditions.But for the thermal treatment of large titanium alloy structure and goods, owing to be subjected to the restriction of vacuum oven furnace volume generally can't heat-treat operation with vacuum oven, and vacuum annealing furnace costs an arm and a leg, safeguards that complicated it is used also has certain restriction.And other traditional antioxidant heat treatment method, such as smearing antioxidizing paint in the surface, soon, workpiece surface will flavescence, become blue after thermal treatment, and oxidation is serious, has influenced the various aspects of performance of workpiece greatly.Therefore be badly in need of a kind of easy, technological feasibility good, satisfy the titanium alloy thermal treatment method that quality product requires.
Summary of the invention
For addressing the above problem, the present invention proposes a kind of heat treating process of titanium alloy in antivacuum furnace, utilize this technology can make titanium alloy component surface non-oxidation be the preceding true qualities of thermal treatment or slight golden yellow, the stress relieving of product is greater than more than 55%, and the mechanical performance index of product satisfies standard-required.
For achieving the above object, the present invention adopts following technical scheme:
Described heat treating process of titanium alloy in antivacuum furnace, this technology comprise to be made thermal treatment casing, workpiece and packs that thermal treatment casing, heat treatment box vacuumize, thermal treatment four procedures into, and each procedure division is as follows:
1) makes the thermal treatment casing
Make suitable casing with stainless steel materials according to the small product size size;
2) the workpiece thermal treatment casing of packing into
At the thick clean titanium bits of bottom half place mat one deck 60～80mm, workpiece pack into the back around workpiece and top also place the thick clean titanium bits of one deck 60～80mm, the refractory pebbles cotton cord is put into the fastening case lid in sealing groove back;
3) heat treatment box vacuumizes
3.1) flexible pipe of applying argon gas is connected with heat treatment box and vacuum pump with after heat treatment box is connected, open vacuum pump, vacuumize;
3.2) according to the size of casing, the pumpdown time is 40～60 minutes, till to the last the applying argon gas flexible pipe is flat fully;
3.3) behind the flexible pipe that vacuumizes with clip chucking, open the inflation of argon gas reducing valve, first low discharge fills a little while big again flow behind the argon gas, and the gas pearl for the treatment of rate of flow meter is inflated during to top;
3.4) treat that the gas pearl falling of rate of flow meter is in suspended state, inflation is finished;
3.5) pull out and vacuumize flexible pipe, clog with stopper fast and vacuumize the mouth of pipe, and with steel wire stopper bolt jail, adjust argon flow amount and be: 12～15L/min is maintained to thermal treatment and finishes;
3.6) note allowing the air outlet keep less gas leakage state;
4, thermal treatment
4.1), according to by the difference of the thermal treatment titanium alloy trade mark and processing requirement, chamber type electric resistance furnace is warming up to the thermal treatment temp that needs earlier, the heat treatment box of the argon gas of the substituting the bad for the good resistance furnace of packing into;
4.2), be heated to certain temperature according to common thermal treatment process after, by coming out of the stove after 1.5～2m/mm insulation;
4.3), come out of the stove after, adjust argon flow amount to maximum, be inflated to casing and reduce to below 150 ℃ and can unpack;
4.4), unpack, take out workpiece.
Because adopt aforesaid technical scheme, the present invention has following superiority:
1, the present invention is to the thermal treatment of annealing of б=20mm titanium alloy test piece for welding, and annealing process is incubated 90 minutes for being heated to 650 ℃, and air cooling is to room temperature.Welding residual stress is carried out in the test piece for welding employing blind hole survey of thermal treatment front and back measure, and measure the tensile strength of processing front and back test piece for welding heat and the impelling strength of weld heat-affected zone, meet the requirements.
2, the present invention has overcome producer does not have vacuum heat treatment furnace or be pilot to be unworthy using and large titanium alloy product vacuum oven is handled the needs of titanium alloy product can't pack into the time.
3, casing specification of the present invention can be according to the specification flexible design of heat treated article.
4, increased output, the heating-up time is fast, and the process-cycle is short, and output has increased, reliable product quality.
5, reduced cost, the energy-saving and water-saving remarkable benefit.
Embodiment
In order to solve large titanium alloy structure peculiar to vessel and goods in forging and pressing; the problem that has bigger stress in the moulding processes such as welding; at titanium alloy zero; the heat treatment equipment method of member has been carried out a large amount of research work; adopt general pit furnace or chamber type electric resistance furnace heat treatment box in conjunction with special use; workpiece is put into the heat treatment box good seal; by at first to after vacuumizing in the heat treatment box; be full of methods such as argon shield again and carry out the thermal treatment of titanium alloy product; be applied successively to the heat-treatment of annealing operation of a large amount of titanium alloy structures and goods; every heat treatment performance index all reaches vacuum oven annealed effect; successfully overcome titanium alloy material problem of oxidation in the thermal treatment under antivacuum annealing furnace state; having satisfied does not have large vacuum furnace and be pilot to be unworthy using under the situation of vacuum oven to the large titanium alloy product; heat treating method to titanium alloy product; for thermal treatment protected workings such as naval and civilian titanium alloy large-sized product solve production bottleneck, satisfy the needs of titanium alloy product fast development.
Heat treating process of titanium alloy in antivacuum furnace of the present invention comprises to be made thermal treatment casing, workpiece and packs that thermal treatment casing, heat treatment box vacuumize, thermal treatment four procedures into, and each procedure division is as follows:
1) makes the thermal treatment casing
Make suitable casing with stainless steel materials according to the small product size size;
2) the workpiece thermal treatment casing of packing into
At the thick clean titanium bits of bottom half place mat one deck 60～80mm, workpiece pack into the back around workpiece and top also place the thick clean titanium bits of one deck 60～80mm, the refractory pebbles cotton cord is put into the fastening case lid in sealing groove back;
3) heat treatment box vacuumizes
3.1) flexible pipe of applying argon gas is connected with heat treatment box and vacuum pump with after heat treatment box is connected, open vacuum pump, vacuumize;
3.2) according to the size of casing, the pumpdown time is 40～60 minutes, till to the last the applying argon gas flexible pipe is flat fully;
3.3) behind the flexible pipe that vacuumizes with clip chucking, open the inflation of argon gas reducing valve, first low discharge fills a little while big again flow behind the argon gas, and the gas pearl for the treatment of rate of flow meter is inflated during to top;
3.4) treat that the gas pearl falling of rate of flow meter is in suspended state, inflation is finished;
3.5) pull out and vacuumize flexible pipe, clog with stopper fast and vacuumize the mouth of pipe, and with steel wire stopper bolt jail, adjust argon flow amount and be: 12～15L/min is maintained to thermal treatment and finishes;
3.6) note allowing the air outlet keep less gas leakage state;
4, thermal treatment
4.1), according to by the difference of the thermal treatment titanium alloy trade mark and processing requirement, chamber type electric resistance furnace is warming up to the thermal treatment temp that needs earlier, the heat treatment box of the argon gas of the substituting the bad for the good resistance furnace of packing into;
4.2), be heated to certain temperature according to common thermal treatment process after, by coming out of the stove after 1.5～2m/mm insulation;
4.3), come out of the stove after, adjust argon flow amount to maximum, be inflated to casing and reduce to below 150 ℃ and can unpack;
4.4), unpack, take out workpiece.
Concrete exemplary applications is as follows:
Embodiment 1
Be used for the stress relieving of welding tubing such as Φ 33 peculiar to vessel, Φ 158, Φ 168, Φ 219, Φ 324.The thermal treatment rear surface does not have any oxidation, and every performance index all reach the requirement of GB/T3621-94 standard of materials, meets the demands no quality problems fully in follow-up processing with in using.
Embodiment 2
Be used for the XX large welded structures, diameter 1150mm, the stress relieving operation after the welding of height 2500mm housing, the thermal treatment rear surface does not have any oxidation, and welding stress is eliminated greater than 55%, and unrelieved stress is even, for quality product provides reliable assurance.
Embodiment 3
Be used for the stress relieving of peculiar to vessel and civilian titanium alloy pressure forming pipe fitting and weld-end fittings, the thermal treatment rear surface does not have the every performance index of any oxidation and reaches standard of materials requirement in the GB/T3621-94 regulation, no quality problems meet the demands fully in follow-up processing with in using.
Claims (1)
1, a kind of heat treating process of titanium alloy in antivacuum furnace is characterized in that: this technology comprises makes thermal treatment casing, workpiece and packs that thermal treatment casing, heat treatment box vacuumize, thermal treatment four procedures into, and each procedure division is as follows:
1) makes the thermal treatment casing
Make suitable casing with stainless steel materials according to the small product size size;
2) the workpiece thermal treatment casing of packing into
At the thick clean titanium bits of bottom half place mat one deck 60～80mm, workpiece pack into the back around workpiece and top also place the thick clean titanium bits of one deck 60～80mm, the refractory pebbles cotton cord is put into the fastening case lid in sealing groove back;
3) heat treatment box vacuumizes
3.1) flexible pipe of applying argon gas is connected with heat treatment box and vacuum pump with after heat treatment box is connected, open vacuum pump, vacuumize;
3.2) according to the size of casing, the pumpdown time is 40～60 minutes, till to the last the applying argon gas flexible pipe is flat fully;
3.3) behind the flexible pipe that vacuumizes with clip chucking, open the inflation of argon gas reducing valve, first low discharge fills a little while big again flow behind the argon gas, and the gas pearl for the treatment of rate of flow meter is inflated during to top;
3.4) treat that the gas pearl falling of rate of flow meter is in suspended state, inflation is finished;
3.5) pull out and vacuumize flexible pipe, clog with stopper fast and vacuumize the mouth of pipe, and with steel wire stopper bolt jail, adjust argon flow amount and be: 12～15L/min is maintained to thermal treatment and finishes;
3.6) note allowing the air outlet keep less gas leakage state;
4) thermal treatment
4.1), according to by the difference of the thermal treatment titanium alloy trade mark and processing requirement, chamber type electric resistance furnace is warming up to the thermal treatment temp that needs earlier, the heat treatment box of the argon gas of the substituting the bad for the good resistance furnace of packing into;
4.2), be heated to certain temperature according to common thermal treatment process after, by coming out of the stove after 1.5～2m/mm insulation;
4.3), come out of the stove after, adjust argon flow amount to maximum, be inflated to casing and reduce to below 150 ℃ and can unpack;
4.4), unpack, take out workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710189892A CN100575533C (en) | 2007-11-02 | 2007-11-02 | A kind of heat treating process of titanium alloy in antivacuum furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710189892A CN100575533C (en) | 2007-11-02 | 2007-11-02 | A kind of heat treating process of titanium alloy in antivacuum furnace |
Publications (2)
| Publication Number | Publication Date |
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| CN101423922A CN101423922A (en) | 2009-05-06 |
| CN100575533C true CN100575533C (en) | 2009-12-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359691A (en) * | 2011-08-31 | 2012-02-22 | 南京三邦金属复合材料有限公司 | TA9 expansion joint manufacturing method |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102560305B (en) * | 2011-12-22 | 2013-09-18 | 洛阳双瑞精铸钛业有限公司 | High-efficiency short-process heat treatment technology for marine titanium alloy |
| CN103692151B (en) * | 2012-09-28 | 2016-02-24 | 宁波江丰电子材料股份有限公司 | The manufacture method of titanium focusing ring |
| FR3038622B1 (en) * | 2015-07-06 | 2017-08-04 | Snecma | METHOD FOR THERMALLY PROCESSING TITANIUM ALLOY POWDER PREFORM |
| CN106670674B (en) * | 2016-12-13 | 2019-06-11 | 西安交通大学 | A method of for determining each zone position in industrially pure titanium joint made by flame welding cross section |
| CN110835673A (en) * | 2019-12-09 | 2020-02-25 | 中航沈飞民用飞机有限责任公司 | Method for preventing stainless steel from being oxidized during heat treatment |
| CN111254372B (en) * | 2020-02-14 | 2022-01-11 | 西北工业大学 | Method for reducing oxidation of TiAl alloy |
| CN112126872A (en) * | 2020-08-18 | 2020-12-25 | 洛阳双瑞精铸钛业有限公司 | Non-vacuum annealing method for large titanium casting |
| CN114346624B (en) * | 2022-03-15 | 2022-12-13 | 湖南湘投金天科技集团有限责任公司 | Preparation method of titanium alloy pressure-resistant spherical shell |
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2007
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359691A (en) * | 2011-08-31 | 2012-02-22 | 南京三邦金属复合材料有限公司 | TA9 expansion joint manufacturing method |
| CN102359691B (en) * | 2011-08-31 | 2012-10-17 | 南京三邦金属复合材料有限公司 | TA9 expansion joint manufacturing method |
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| CN101423922A (en) | 2009-05-06 |
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