CN112453302A - Method for forging titanium alloy TC11 step shaft by using radial forging press - Google Patents
Method for forging titanium alloy TC11 step shaft by using radial forging press Download PDFInfo
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- CN112453302A CN112453302A CN202011217152.9A CN202011217152A CN112453302A CN 112453302 A CN112453302 A CN 112453302A CN 202011217152 A CN202011217152 A CN 202011217152A CN 112453302 A CN112453302 A CN 112453302A
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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
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
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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
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/12—Making machine elements axles or shafts of specially-shaped cross-section
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Abstract
The invention belongs to the technical field of forging, and particularly relates to a method for forging a titanium alloy TC11 step shaft by using a radial forging press, which comprises the following steps: a. preparing a blank; b. radial forging of the first step shaft; c. radial forging of the intermediate step shaft; d. and (6) shaping. According to the invention, the performance structure of the step shaft product is improved by controlling the forging speed, the frequency, the deformation amount of each pass, the forging frequency of each pass and the forging motion mode of the radial forging of the first step shaft and the radial forging of the intermediate step shaft, so that the quality stability and the structural performance uniformity of the titanium alloy TC11 step shaft are improved, the product yield is also improved to about 60%, the product yield is obviously improved, and the method is favorable for popularization.
Description
Technical Field
The invention belongs to the technical field of forging, and particularly relates to a method for forging a titanium alloy TC11 step shaft by using a radial forging press.
Background
The TC11 alloy is an alpha + beta type heat-strong titanium alloy with good comprehensive performance, has excellent heat-strong performance (high-temperature strength, creep resistance and the like) below 500 ℃, and has higher room-temperature strength. The alloy has good hot working manufacturability, and can be welded and machined in various modes. The method is mainly used for manufacturing parts such as compressor disks, blades and the like of aeroengines, and can also be used for manufacturing weaponry (various launching cartridges).
The forging process of the existing titanium alloy TC11 step shaft comprises the following steps: upsetting a titanium ingot → drawing to a bar blank → drawing to a ruler by last fire → heat treatment → performance inspection → machining, however, the titanium alloy TC11 step shaft produced by the process of the rapid forging machine mainly has the problems of unstable product quality, serious surface fracture, low yield and the like, and the product yield is only about 35% according to statistics.
Disclosure of Invention
The invention aims to provide a method for forging a titanium alloy TC11 step shaft by using a radial forging press, which has high yield.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for forging the titanium alloy TC11 stepped shaft by using the radial forging press comprises the following steps:
a. preparing a blank, namely upsetting an ingot and drawing out a titanium ingot to provide the blank for a radial forging press;
b. radial forging of a first step shaft, namely, forging the blank for multiple times through a radial forging press to form the first step shaft through pre-forging, wherein the forging speed for forming the first step shaft is 2-4m/min, the times of the forging are 3-4, the deformation of each time is 10-25%, the total deformation is more than or equal to 40%, the forging frequency of each time is 90 times/min, and the forging motion mode is intermittent unidirectional motion, namely, after each time of forging is finished, the blank returns to the starting point and then is forged until the forging is finished;
c. radial forging of the intermediate step shaft, namely performing multi-pass forging on the middle part of the first step shaft through a radial forging press to form the intermediate step shaft, and forming a transition section between the first step shaft and the intermediate step shaft, wherein the forging speed for forming the intermediate step shaft is 2-4m/min, the pass number is 4-5, the deformation of each pass is 10-25%, the forging frequency of each pass is 180 times/min, and the forging motion mode is intermittent unidirectional motion, namely after each pass is forged, forging is performed after the empty pass returns to the starting point until the forging is finished;
d. and (6) shaping.
Further, in step a, the ingot upsetting and the titanium ingot drawing-out are performed in a fast forging machine.
Further, in the step d, the first step shaft, the middle step shaft and the transition section are forged for multiple times through a radial forging press, so that the step shaft is shaped, wherein the deformation of the last radial forging of the shaping is less than or equal to 5%, the forging speed is 1-2m/min, the forging frequency is 180 times/min, the final forging temperature is greater than or equal to 780 ℃, and the forging motion mode is intermittent unidirectional motion, namely that after each time of forging is finished, the empty forging returns to the starting point.
The invention has the beneficial effects that: the radial forging is carried out through the radial forging press, the performance structure of the step shaft product is improved by controlling the forging speed, the channel times, the deformation amount of each channel, the forging frequency of each channel and the forging motion mode of the radial forging of the first step shaft and the radial forging of the middle step shaft, the quality stability and the structural performance uniformity of the titanium alloy TC11 step shaft are improved, the product yield is also improved to about 60 percent, the product yield is obviously improved, and the method is favorable for popularization.
Drawings
FIG. 1 is a high magnification organization view of a first step axis of an embodiment of the present invention;
FIG. 2 is a high magnification organization diagram of an intermediate step axis in an embodiment of the invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
The method for forging the titanium alloy TC11 step shaft by using the radial forging press, wherein the titanium alloy TC11 step shaft comprises a plurality of sections of first step shafts and a plurality of sections of middle step shafts, and comprises the following steps:
a. preparing a blank, namely upsetting and drawing out a titanium ingot according to the size of the titanium ingot and the actual size of a quick forging machine, wherein the step is to obtain the blank without cracks on the surface and provide the blank for a radial forging press,
b. radial forging of a first step shaft, namely performing multi-pass forging on a blank by a radial forging press to form the first step shaft by pre-forging, wherein the first step shaft refers to the large-diameter part of the finished titanium alloy TC11 step shaft, the forging speed for forming the first step shaft is 2-4m/min, the pass number is 3-4, the deformation of each pass is 10-25%, the total deformation is not less than 40%, the forging frequency of each pass is 90 times/min, the forging motion mode is intermittent one-way motion, namely the motion direction of the bar blank is always A to B motion, after each pass of forging is finished, the blank returns to the starting point and then is forged until the forging is finished, the transverse and longitudinal temperature uniformity of the first step shaft is ensured, crystal grains are prevented from growing up, and the product performance is improved;
c. radial forging of the intermediate step shaft, namely performing multi-pass forging on the middle part of the first step shaft through a radial forging press to form the intermediate step shaft, wherein the intermediate step shaft refers to the small-diameter part of the finished titanium alloy TC11 step shaft, a transition section is formed between the first step shaft and the intermediate step shaft, the forging speed for forming the intermediate step shaft is 2-4m/min, the pass frequency is 4-5, the deformation of each pass is 10-25%, the forging frequency of each pass is 180 times/min, the forging motion mode is an intermittent one-way motion mode, namely the motion direction of the bar blank is always A-B motion, and after each pass of forging is finished, the blank returns to the starting point and then is forged until the forging is finished;
d. shaping, namely performing multi-pass forging on the first step shaft, the middle step shaft and the transition section through a radial forging press, thereby realizing the shaping of the step shafts, wherein the deformation of the last pass of the shaping is less than or equal to 5%, the forging speed is 1-2m/min, the forging frequency is 180 times/min, the final forging temperature is more than or equal to 780 ℃, the forging motion mode is intermittent unidirectional motion, namely the motion direction of the bar stock is always A to B, and after each pass of forging is finished, the empty pass returns to the starting point.
Radial forging is carried out through a radial forging press, and the performance structure of the step shaft product is improved by controlling the forging speed, the channel times, the deformation amount of each channel, the forging frequency of each channel and the forging motion mode of the radial forging of the first step shaft and the radial forging of the middle step shaft, so that the quality stability and the structural performance uniformity of the titanium alloy TC11 step shaft are improved, the product yield is also improved to about 60 percent, the product yield is obviously improved, and the popularization is facilitated.
Example 1
According to the invention, the titanium alloy TC11 stepped shaft with the size of phi 100 x 1500mm + phi 190 x 1000mm is forged by a method for forging the titanium alloy TC11 stepped shaft by using a radial forging press, and the method comprises the following steps:
a. preparing a blank, wherein the parameters of the titanium ingot are as follows: the diameter is 750mm, the length is 1.5m, the weight is 3000kg, a titanium ingot is upset by a quick forging machine to H/2, then the titanium ingot is drawn out to be 280mm, cracks on the surface of the blank are cleaned, and the blank is provided for a radial forging machine (for example, an 18MN radial forging press).
b. Radial forging of a first step shaft, namely, forging a blank drawn to 280mm of an octagonal shape in a multi-pass manner by a radial forging press after surface cracks of the blank are cleaned, wherein the blank is forged to phi 270mm in the first pass, the forging speed is 4m/min, the blank is forged to phi 240mm in the second pass, the forging speed is 3.5m/min, the blank is forged to phi 215mm in the third pass, the forging speed is 3m/min, the blank is forged to phi 200mm in the fourth pass, the forging speed is 2m/min, the deformation of each pass is 10-25%, the total deformation is not less than 40%, the forging frequency of each pass is 90 times/min, the forging motion mode is intermittent unidirectional motion, and the multi-pass forging of the first step shaft is finished.
C. Radial forging of the intermediate step shaft, namely performing multi-pass forging on the middle part of the first step shaft through a radial forging press to form the intermediate step shaft, forming a transition section between the first step shaft and the intermediate step shaft, wherein the forging speed of the intermediate step shaft is 2-4m/min, the pass number is 5, and the middle part of the first step shaft is forged to phi 170mm in the first pass; forging the middle part of the first step shaft to phi 150mm in a second pass; forging the middle part of the first step shaft to phi 135mm in the third pass; forging the middle part of the first step shaft to phi 120mm in a fourth pass; forging the middle part of the first step shaft to phi 110mm, forging the middle step shaft by using 5 passes to form the middle step shaft, wherein the deformation of each pass is 10-25%, the forging frequency of each pass is 180 times/min, the forging motion mode is intermittent unidirectional motion, and the multi-pass forging of the middle step shaft is finished.
d. Shaping, namely performing multi-pass forging on the first stepped shaft, the middle stepped shaft and the transition section through a radial forging press to realize shaping of the stepped shaft, and obtaining a stepped shaft with phi 100 x 1500mm + phi 190 x 1000mm times of length, wherein the deformation of the last radial forging of the shaping is less than or equal to 5%, the forging speed is 1-2m/min, the forging frequency is 180 times/min, the finish forging temperature is greater than or equal to 780 ℃, and the forging motion mode is intermittent unidirectional motion.
e. The stepped shaft obtained by radial forging is segmented and finished, and the finished product TC11 stepped shaft yield can reach 61.32%.
And (3) carrying out performance test on the finished titanium alloy TC11 step shaft: as shown in Table I
(watch one)
As can be seen from table i, fig. 1 and fig. 2, the performance uniformity and quality stability of the first step axis and the middle step axis of the TC11 step axis of the finished product are good.
Claims (3)
1. The method for forging the titanium alloy TC11 step shaft by using the radial forging press is characterized by comprising the following steps of: the method comprises the following steps:
a. preparing a blank, namely upsetting an ingot and drawing out a titanium ingot to provide the blank for a radial forging press;
b. radial forging of a first step shaft, namely, forging the blank for multiple times through a radial forging press to form the first step shaft through pre-forging, wherein the forging speed for forming the first step shaft is 2-4m/min, the times of the forging are 3-4, the deformation of each time is 10-25%, the total deformation is more than or equal to 40%, the forging frequency of each time is 90 times/min, and the forging motion mode is intermittent unidirectional motion, namely, after each time of forging is finished, the blank returns to the starting point and then is forged until the forging is finished;
c. radial forging of the intermediate step shaft, namely performing multi-pass forging on the middle part of the first step shaft through a radial forging press to form the intermediate step shaft, and forming a transition section between the first step shaft and the intermediate step shaft, wherein the forging speed for forming the intermediate step shaft is 2-4m/min, the pass number is 4-5, the deformation of each pass is 10-25%, the forging frequency of each pass is 180 times/min, and the forging motion mode is intermittent unidirectional motion, namely after each pass is forged, forging is performed after the empty pass returns to the starting point until the forging is finished;
d. and (6) shaping.
2. The method of forging a titanium alloy TC11 stepped shaft using a radial forging press as recited in claim 1, wherein: in step a, ingot upsetting and ingot drawing are performed in a fast forging machine.
3. The method of forging a titanium alloy TC11 stepped shaft using a radial forging press as recited in claim 1, wherein: in the step d, the first step shaft, the middle step shaft and the transition section are forged for multiple times through a radial forging press, so that the step shaft is shaped, wherein the deformation of the last radial forging of the shaping is less than or equal to 5%, the forging speed is 1-2m/min, the forging frequency is 180 times/min, the final forging temperature is greater than or equal to 780 ℃, and the forging motion mode is intermittent unidirectional motion, namely that after each time of forging is finished, the empty forging returns to the starting point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011217152.9A CN112453302A (en) | 2020-11-04 | 2020-11-04 | Method for forging titanium alloy TC11 step shaft by using radial forging press |
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| CN202011217152.9A CN112453302A (en) | 2020-11-04 | 2020-11-04 | Method for forging titanium alloy TC11 step shaft by using radial forging press |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857416A (en) * | 2021-09-18 | 2021-12-31 | 河南中原特钢装备制造有限公司 | Technology for forging roller-type forge pieces by combining two types of pressing machines |
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| CN110756613A (en) * | 2019-10-30 | 2020-02-07 | 成都先进金属材料产业技术研究院有限公司 | Preparation method of small-ingot-shaped GH3128 alloy bar |
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2020
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| US6247346B1 (en) * | 1996-12-18 | 2001-06-19 | Alcoa Inc. | Method of forming a drive shaft |
| JP2003334633A (en) * | 2002-05-16 | 2003-11-25 | Daido Steel Co Ltd | Manufacturing method for stepped shaft-like article |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113857416A (en) * | 2021-09-18 | 2021-12-31 | 河南中原特钢装备制造有限公司 | Technology for forging roller-type forge pieces by combining two types of pressing machines |
| CN113857416B (en) * | 2021-09-18 | 2023-08-22 | 河南中原特钢装备制造有限公司 | Process for forging roll shaft forge piece by combining two presses |
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Effective date of registration: 20220608 Address after: 621700 Jiangdong Road, Jiangyou City, Mianyang, Sichuan Applicant after: PANGANG GROUP JIANGYOU CHANGCHENG SPECIAL STEEL Co.,Ltd. Address before: 621709 2 / F, building 5173, Changgang plant, Sanhe Town, Jiangyou City, Mianyang City, Sichuan Province Applicant before: Jiangyou branch of Panzhihua Titanium Material Co., Ltd. of Pangang Group |
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