CN111014536A - Forging method of titanium alloy wide plate - Google Patents
Forging method of titanium alloy wide plate Download PDFInfo
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- CN111014536A CN111014536A CN201911227298.9A CN201911227298A CN111014536A CN 111014536 A CN111014536 A CN 111014536A CN 201911227298 A CN201911227298 A CN 201911227298A CN 111014536 A CN111014536 A CN 111014536A
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- titanium alloy
- forging
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- plate
- titanium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/008—Incremental forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
Abstract
The invention discloses a forging method of a titanium alloy wide plate in the technical field of titanium alloy plate manufacturing, which comprises the steps of upsetting, transverse rolling, forging and shaping and longitudinal drawing, wherein the upsetting firstly increases the diameter of a titanium alloy ingot, the transverse rolling is to press the titanium alloy ingot into a primary plate shape by using a forging press, the forging and shaping mainly removes an arc-shaped edge, and finally the longitudinal drawing is carried out to obtain the plate meeting the requirements. The invention produces the titanium alloy broad width plate by using the free forging mode, can obtain the plate with thicker thickness, the whole process is easy to operate, the quality is easy to control, the edge of the produced titanium alloy broad width plate obtains sufficient forging deformation in the forging process, the produced titanium alloy broad width plate has the same structure as the middle part, can reach the same flaw detection level as the middle part, the edge and the center of the forged titanium alloy broad width plate have good structures, and the forged titanium alloy broad width plate also has better edge corner shape and can be directly produced and utilized.
Description
Technical Field
The invention relates to the technical field of titanium alloy plate manufacturing, in particular to a forging method of a titanium alloy wide plate.
Background
The titanium alloy is an alloy formed by adding other elements into titanium as a base, has the advantages of high strength, small density, good mechanical property, good toughness and corrosion resistance and the like, and is widely applied to aerospace equipment and military products. With the military requirement of high-quality titanium and titanium alloy plates, stricter use requirements are provided for the thickness and the width of the plates, and the titanium alloy plates are manufactured by a rolling production method in the prior art, but the titanium alloy plates are generally thinner and are limited in use. For titanium alloy plates with larger thickness, no economical and practical preparation method exists at present because the titanium alloy materials have poorer mechanical properties and are difficult to cut.
Disclosure of Invention
In order to overcome the defects of lower thickness and the like of the titanium alloy plate produced by rolling in the prior art, the invention aims to solve the technical problems that: provides a forging method of a titanium alloy wide plate.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the forging method of the titanium alloy wide plate comprises the following steps:
i, upsetting: taking a titanium alloy ingot with the diameter of D and the length of L, heating the titanium alloy ingot, upsetting the titanium alloy ingot under a forging press, and enabling the diameter of the upset titanium alloy ingot to be 1.2-1.4D;
II, transverse rolling: horizontally placing the upset titanium ingot on a lower anvil of a forging press, enabling the length direction axis of the titanium alloy ingot to be vertical to the operation axis of the press, rolling the upset titanium alloy ingot, enabling the titanium alloy ingot to be expanded along the radial direction of the ingot, and controlling the width of a titanium alloy blank to be 1.5-2.0 times of the width of a final continuous rolling titanium blank product;
III, forging and shaping: turning over the titanium alloy blank obtained after transverse rolling, enabling the axial line of the titanium alloy blank in the length direction to be parallel to the axial line of an operating axle of a pressing machine, forging the titanium alloy blank to form a blank which is deformed in the middle, erecting the blank again, forging the arc ends at two ends of the plate in an upsetting mode, and reducing the tangential length of the arc;
IV, longitudinal drawing: and (3) flatly placing the upset titanium alloy blank to enable the axial line of the length direction of the titanium alloy blank to be parallel to the axial line of an operating vehicle of the press, longitudinally drawing one end of the titanium blank clamped by an operating vehicle of the forging press, and forging and pressing the titanium blank alternately in the thickness direction and the width direction of the titanium blank until the required thickness and width are obtained, namely forging the titanium alloy wide plate.
Further, the diameter D of the titanium alloy ingot is 700-750 mm, and the length L is 1.5-2.5D.
Further, when upsetting is carried out in the step I, the titanium alloy ingot is heated to 1100-1200 ℃.
Furthermore, when the transverse rolling is carried out in the step II, the lower anvil of the forging press uses a rotatable circular lower anvil with the diameter more than or equal to 2m, and the feeding amount is controlled to be less than or equal to 20% during the rolling.
Furthermore, when the longitudinal drawing is carried out in the step IV, the feeding amount of the forging press is controlled to be less than or equal to 20 percent.
The invention has the beneficial effects that: the invention produces the titanium alloy broad width plate by using the free forging mode, can obtain the plate with thicker thickness, the whole process is easy to operate, the quality is easy to control, the edge of the produced titanium alloy broad width plate obtains sufficient forging deformation in the forging process, has the same structure as the middle part, can reach the same flaw detection level as the middle part, and the edge and the center of the forged titanium alloy broad width plate have good structures; and the edge has enough deformation, the edge corner of the edge is close to a right angle, the radius of the circular arc is less than or equal to 5mm, the surface defect of the edge corner part can be easily removed by machining, and the forged titanium alloy wide plate has a better edge corner shape and can be directly produced and utilized.
Detailed Description
The present invention will be further described with reference to the following examples.
The forging method of the titanium alloy wide plate comprises the following steps:
i, upsetting: taking a titanium alloy ingot with the diameter of D and the length of L, heating the titanium alloy ingot, upsetting the titanium alloy ingot under a forging press, and enabling the diameter of the upset titanium alloy ingot to be 1.2-1.4D;
II, transverse rolling: horizontally placing the upset titanium ingot on a lower anvil of a forging press, enabling the length direction axis of the titanium alloy ingot to be vertical to the operation axis of the press, rolling the upset titanium alloy ingot, enabling the titanium alloy ingot to be expanded along the radial direction of the ingot, and controlling the width of a titanium alloy blank to be 1.5-2.0 times of the width of a final continuous rolling titanium blank product;
III, forging and shaping: turning over the titanium alloy blank obtained after transverse rolling, enabling the axial line of the titanium alloy blank in the length direction to be parallel to the axial line of an operating axle of a pressing machine, forging the titanium alloy blank to form a blank which is deformed in the middle, erecting the blank again, forging the arc ends at two ends of the plate in an upsetting mode, and reducing the tangential length of the arc;
IV, longitudinal drawing: and (3) flatly placing the upset titanium alloy blank to enable the axial line of the length direction of the titanium alloy blank to be parallel to the axial line of an operating vehicle of the press, longitudinally drawing one end of the titanium blank clamped by an operating vehicle of the forging press, and forging and pressing the titanium blank alternately in the thickness direction and the width direction of the titanium blank until the required thickness and width are obtained, namely forging the titanium alloy wide plate.
When selecting a titanium alloy ingot, the size of the currently commonly used titanium alloy wide-width plate is mainly as follows: 100-250, 1150-1500 and more than or equal to 2000mm, therefore, the diameter D of the selected titanium alloy ingot is 700-750 mm, and the length L is 1.5-2.5D.
Besides the above main process steps, in order to achieve better forging effect, some specific parameter controls are also needed, which specifically include: when upsetting is carried out in the step I, the titanium alloy ingot is heated to 1100-1200 ℃, and when the titanium alloy ingot is heated to the temperature, the titanium alloy ingot has better mechanical property and is easier to process and deform; when the transverse rolling is carried out in the step II, a lower anvil of the forging press uses a rotatable circular lower anvil with the diameter more than or equal to 2m, and the feeding amount is controlled to be less than or equal to 20% during the rolling, so that the forging efficiency and quality are ensured; and when the longitudinal drawing is carried out in the step IV, the feeding amount of the forging press is controlled to be less than or equal to 20 percent, so that the drawn plate has uniform texture.
The first embodiment is as follows:
by utilizing the forging process, a titanium alloy wide plate with the width B of 1150mm is forged by a titanium alloy ingot with the diameter D of 700mm, and the width B of 1.64D; comprises the following steps:
① raw material selection:
titanium alloy ingot, size: Φ 700 × L mm.
② forging method of wide titanium alloy plate:
i, upsetting: taking a titanium alloy ingot with the diameter D of 700mm and the length L of 1500mm, heating the titanium alloy ingot to 1100-1200 ℃, upsetting the titanium alloy ingot under a forging press (the diameter of the titanium alloy ingot is increased), and forging the titanium alloy ingot until the diameter D of the upset titanium alloy ingot is 900mm and the length of the upset titanium alloy ingot is 910 mm;
II, transverse rolling: after upsetting the titanium ingot, transversely rolling on a large-plane lower anvil (phi 2200mm, rotatable) and forging to obtain a titanium alloy blank with the width of 1250mm, the thickness of 300mm and the length of 1500 mm;
III, forging and shaping: rotating the titanium alloy blank obtained after transverse rolling by 90 degrees to enable the axial line of the titanium alloy blank in the length direction to be parallel to the axial line of an operating axle of a press, and forging the titanium alloy blank to an intermediate deformed blank; erecting the blank again, forging the arc ends at the two ends of the plate in an upsetting mode, and reducing the tangential length of the arc; the dimensions after reshaping were: a titanium alloy blank with the width of 1250mm, the thickness of 290mm and the length of 1400 mm;
IV, longitudinal drawing: the titanium alloy blank after upsetting is placed straightly, so that the axial line of the titanium alloy blank in the length direction is parallel to the axial line of the operating axle of the pressing machine; and an operating vehicle of the forging press clamps one end of the titanium billet to longitudinally elongate, forge and press the titanium billet alternately in the thickness direction and the width direction, the feeding amount is controlled to be less than or equal to 20 percent, and finally the titanium alloy wide plate with the width B of 1150mm, the thickness of 180mm and the length of 2500mm is forged.
Example two: by utilizing the forging process, a titanium alloy wide plate with the width B of 1500mm is forged by a titanium alloy ingot with the diameter D of 750mm, and the width B of 2.0D; comprises the following steps:
① raw material selection:
titanium alloy ingot, size: Φ 750 × L mm.
② forging method of wide titanium alloy plate:
i, upsetting: taking a titanium alloy ingot with the diameter D of 750mm and the length L of 1500mm, heating the titanium alloy ingot to 1100-1200 ℃, upsetting the titanium alloy ingot under a forging press (the diameter of the titanium alloy ingot is increased), and forging the titanium alloy ingot until the diameter D of the upset titanium alloy ingot is 950mm and the length of the upset titanium alloy ingot is 920 mm;
II, transverse rolling: after upsetting the titanium ingot, transversely rolling on a large-plane lower anvil (phi 2200mm, rotatable) and forging to obtain a titanium alloy blank with the width of 1600mm, the thickness of 300mm and the length of 1350 mm;
III, forging and shaping: rotating the titanium alloy blank obtained after transverse rolling by 90 degrees to enable the axial line of the titanium alloy blank in the length direction to be parallel to the axial line of an operating axle of a press, and forging the titanium alloy blank to an intermediate deformed blank; erecting the blank again, forging the arc ends at the two ends of the plate in an upsetting mode, and reducing the tangential length of the arc; the dimensions after reshaping were: a titanium alloy blank with the width of 1600mm, the thickness of 290mm and the length of 1400 mm;
IV, longitudinal drawing: the titanium alloy blank after upsetting is placed straightly, so that the axial line of the titanium alloy blank in the length direction is parallel to the axial line of the operating axle of the pressing machine; and an operating vehicle of the forging press clamps one end of the titanium billet to longitudinally elongate, forge and press the titanium billet alternately in the thickness direction and the width direction, the feeding amount is controlled to be less than or equal to 20 percent, and finally, the titanium alloy wide plate with the width B of 1500mm, the thickness of 150mm and the length of 2300mm is forged.
In conclusion, the titanium alloy wide plate with good quality can be manufactured by adopting the forging process, the process is simple, large-scale industrial application can be carried out, and the forging process has good practicability and application prospect.
Claims (5)
1. The forging method of the titanium alloy wide plate is characterized by comprising the following steps of:
i, upsetting: taking a titanium alloy ingot with the diameter of D and the length of L, heating the titanium alloy ingot, upsetting the titanium alloy ingot under a forging press, and enabling the diameter of the upset titanium alloy ingot to be 1.2-1.4D;
II, transverse rolling: horizontally placing the upset titanium ingot on a lower anvil of a forging press, enabling the length direction axis of the titanium alloy ingot to be vertical to the operation axis of the press, rolling the upset titanium alloy ingot, enabling the titanium alloy ingot to be expanded along the radial direction of the ingot, and controlling the width of a titanium alloy blank to be 1.5-2.0 times of the width of a final continuous rolling titanium blank product;
III, forging and shaping: turning over the titanium alloy blank obtained after transverse rolling, enabling the axial line of the titanium alloy blank in the length direction to be parallel to the axial line of an operating axle of a pressing machine, forging the titanium alloy blank to form a blank which is deformed in the middle, erecting the blank again, forging the arc ends at two ends of the plate in an upsetting mode, and reducing the tangential length of the arc;
IV, longitudinal drawing: and (3) flatly placing the upset titanium alloy blank to enable the axial line of the length direction of the titanium alloy blank to be parallel to the axial line of an operating vehicle of the press, longitudinally drawing one end of the titanium blank clamped by an operating vehicle of the forging press, and forging and pressing the titanium blank alternately in the thickness direction and the width direction of the titanium blank until the required thickness and width are obtained, namely forging the titanium alloy wide plate.
2. The forging method of a wide plate of titanium alloy as claimed in claim 1, wherein: the diameter D of the titanium alloy ingot is 700-750 mm, and the length L is 1.5-2.5D.
3. The forging method of a wide plate of titanium alloy as claimed in claim 1, wherein: and (3) heating the titanium alloy ingot to 1100-1200 ℃ when upsetting is carried out in the step I.
4. The forging method of a wide plate of titanium alloy as claimed in claim 1, wherein: and (3) when the transverse rolling is carried out in the step (II), the lower anvil of the forging press uses a rotatable circular lower anvil with the diameter of more than or equal to 2m, and the feeding amount is controlled to be less than or equal to 20% during the rolling.
5. The forging method of a wide plate of titanium alloy as claimed in claim 1, wherein: and when the longitudinal drawing is carried out in the step IV, the feeding amount of the forging press is controlled to be less than or equal to 20 percent.
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| CN201911227298.9A CN111014536A (en) | 2019-12-04 | 2019-12-04 | Forging method of titanium alloy wide plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113751637A (en) * | 2021-09-16 | 2021-12-07 | 湖南金天钛业科技有限公司 | Forging method for improving yield of large-size titanium plate blank |
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| SU1278092A1 (en) * | 1984-06-29 | 1986-12-23 | Краматорский Индустриальный Институт | Method of swaging ingots |
| JPH07328737A (en) * | 1994-06-08 | 1995-12-19 | Japan Steel Works Ltd:The | Upsetting forming method for metallic material |
| CN101176906A (en) * | 2007-12-03 | 2008-05-14 | 鞍钢重型机械有限责任公司锻造厂 | Method for forging cake series forgeable piece with different directions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113751637A (en) * | 2021-09-16 | 2021-12-07 | 湖南金天钛业科技有限公司 | Forging method for improving yield of large-size titanium plate blank |
| CN113751637B (en) * | 2021-09-16 | 2023-08-18 | 湖南湘投金天钛业科技股份有限公司 | Forging method for improving yield of large-sized titanium plate blank |
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