CN101773978B - Method for preparing TC20 titanium alloy small dimension bar for surgical implant - Google Patents
Method for preparing TC20 titanium alloy small dimension bar for surgical implant Download PDFInfo
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- CN101773978B CN101773978B CN 200910254551 CN200910254551A CN101773978B CN 101773978 B CN101773978 B CN 101773978B CN 200910254551 CN200910254551 CN 200910254551 CN 200910254551 A CN200910254551 A CN 200910254551A CN 101773978 B CN101773978 B CN 101773978B
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Abstract
The invention discloses a method for preparing TC20 titanium alloy small dimension bar for surgical implant. Titanium alloy bar billet with dimension being Phi90 is forged on a precision forging machine, forging heating temperature is 949-979 DEG C, heat preservation time is 60-70min, deformation volume is 25%, straightening and air cooling are carried out after finishing precision forging to obtain precision forged bar billet; a rolling mill is used for staggered rolling with rotation speed being 975r/min, wherein, temperature during bar billet rolling process is 940-970 DEG C, heat preservation time is 40-50min, and air cooling is carried out after rolling to obtain the product. The preparation method in the invention carries out precision forging on TC20 titanium alloy large dimension bar in two phase sections, and rolls the bar billet by adopting different rolling hole patterns after finishing precision forging, so that deformation of edge and center of the bar billet is adequate and uniform, and the prepared small dimension titanium alloy bar meets use standard requirement.
Description
Technical field
The invention belongs to the nonferrous materials processing technique field, relate to a kind of preparation method of TC 20 titanium alloy small dimension bar for surgical implant.
Background technology
The composition of TC20 titanium alloy is Ti-6Al-7Nb, by the exploitation of Switzerland Sulzer medical technology company, and in beginning clinical practice in 1985.As second generation medical titanium alloy, the Nb element better than the cell adapted property of employing with first generation Ti-6Al-4V alloy phase replaces poisonous V element, improved the security of this alloy in the human body environment to a great extent.Because the TC20 alloy not only has good biology and mechanical compatibility, and has and mechanical property like the Ti-6Al-4V alloy phase.In recent years, this alloy is widely used in medical field, becomes the preferred material of surgical implant with device, as the orthopedic device of vertebra, bone screw, intramedullary nail etc.
At present, surgical implant is about Φ 25mm with the specification of TC20 titanium alloy rod bar technology.Along with the continuous increase of deflection, i.e. constantly reducing of bar specification, the secondary recrystallization trend of crystal grain is big more in the tissue, and structural homogenity control is difficult more.The preparation process of existing titanium alloy rod bar is excellent base 1 fiery finish forge, excellent base 2 fiery finish forges.The Forge Heating fire is 2 fire, and total deformation is about 64%, can only prepare the TC20 titanium alloy rod bar of diameter about Φ 25mm.Because the Forging Technology total deformation is little, the forging mode is comparatively simple, the as-cast structure of can not be fully broken excellent base heart portion, its alloy structure is from the edge to the central part, different parts microscopic structure uniformity is relatively poor, so do not reach the requirement of TC20 titanium alloy small-sized bar structural homogenity aspect, adopt this mode just not to be suitable for the more preparation of the bar of small dimension of Φ 8mm-Φ 12mm.
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of TC 20 titanium alloy small dimension bar for surgical implant, the Φ 8mm-Φ 12mm small dimension titanium alloy rod bar structural homogenity that makes is good.
The technical solution adopted in the present invention is, the preparation method of TC 20 titanium alloy small dimension bar for surgical implant carries out according to the following steps:
Step 1.
Get specification and be the titanium alloy rod base of Φ 90, forge on precise forging machine, the Forge Heating temperature is 949-979 ℃, and temperature retention time is 60min-70min, and deflection is 25%, and finish forge is aligned after finishing, and air cooling obtains the excellent base behind the finish forge;
Step 2.
Excellent base behind the finish forge that step 1 is obtained is rolled by milling train, rotating speed is 975r/min, pass through Φ 45mm circle in the operation of rolling successively, 41 * 41mm is square, 38 * 38mm is square, 30 * 30mm is square, the 42mm flat, 23 * 23mm is square, the 35mm flat, 16 * 16mm is square, the 26mm flat, Φ 16mm circle, the 23mm flat, 8.5 * 8.5-12.5 * 12.5 are square, the 14-20 flat, the pass of Φ 8-Φ 12mm circle interlocks rolling, temperature is 940 ℃-970 ℃ in the wherein excellent base operation of rolling, temperature retention time is 40min-50min, air cooling after rolling the finishing, promptly.
Feature of the present invention also is,
Precise forging machine adopts SKK-10 type precise forging machine.
Milling train adopts three open-train mills of ZC250.
Preparation method of the present invention, adopt suitable temperature and deflection, TC20 titanium alloy large size rod base is carried out finish forge at two-phase section, after finishing, adopt finish forge different rolling grooves to be rolled, make the distortion of excellent base edge and heart portion fully, evenly, finally make the evenly tiny of the thick tissue change of TC20 titanium alloy rod base, to obtain each excellent position uniform tissue, the Φ 8mm-Φ 12mm small dimension titanium alloy rod bar that makes satisfies the use standard-required, and have the inferior batch stability of excellent different batches, be applicable to the industrial mass steady production.
Description of drawings
Fig. 1 is the mirco structure photo that adopts the TC20 titanium alloy small-sized bar that the embodiment of the invention 1 makes, and wherein, a is that edge organizes photo, and b is that photo is organized in the center;
Fig. 2 is the mirco structure photo that adopts the TC20 titanium alloy small-sized bar that the embodiment of the invention 2 makes, and wherein, a is that edge organizes photo, and b is that photo is organized in the center;
Fig. 3 is the mirco structure photo that adopts the TC20 titanium alloy small-sized bar that the embodiment of the invention 3 makes, and wherein, a is that edge organizes photo, and b is that photo is organized in the center;
Fig. 4 is the mirco structure photo that adopts the TC20 titanium alloy small-sized bar that traditional handicraft makes, and wherein, a is that edge organizes photo, and b is that photo is organized in the center.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
The TC20 titanium alloy rod bar preparation technology of existing diameter about Φ 25mm is: excellent base 1 fiery finish forge, excellent base 2 fiery finish forges.The Forge Heating fire is 2 fire, and total deformation is about 64%.This Forging Technology total deformation is little, the forging mode is comparatively simple, the as-cast structure of can not be fully broken excellent base heart portion, especially TC20 small size titanium alloy rod bar, the mirco structure photo of the TC20 titanium alloy small-sized bar that it prepares as shown in Figure 4, as can be seen, alloy structure is from the edge to the central part, and different parts microscopic structure uniformity is relatively poor.This Forging Technology can't satisfy Φ 8.0mm-Φ 12.0mm specification the TC20 titanium alloy rod bar organize requirement.
The preparation method of TC 20 titanium alloy small dimension bar for surgical implant of the present invention, specifically carry out according to following steps:
Step 1. rod base finish forge
Getting specification is the titanium alloy rod base of Φ 90, forges on the SKK-10 precise forging machine, and the Forge Heating temperature is at 949-979 ℃, temperature retention time is 60min-70min, and deflection is 25%, and finish forge is aligned after finishing, the type of cooling adopts air cooling, obtains the excellent base behind the finish forge;
Step 2. rod base is rolling
Excellent base behind the finish forge that step 1 is obtained is rolled, selecting milling train for use is three open-train mills of ZC250, rated power is 215KW, rotating speed is 975r/min, pass through Φ 45mm circle in the operation of rolling successively, 41 * 41mm is square, 38 * 38mm is square, 30 * 30mm is square, the 42mm flat, 23 * 23mm is square, the 35mm flat, 16 * 16mm is square, the 26mm flat, Φ 16mm circle, the 23mm flat, 8.5 * 8.5-12.5 * 12.5 are square, the 14-20 flat, the pass of Φ 8-Φ 12mm circle interlocks rolling, temperature is 940 ℃-970 ℃ in the wherein excellent base operation of rolling, temperature retention time is 40min-50min, select the air cooling cooling after rolling the finishing, promptly.
Embodiment 1:
Get specification and be the titanium alloy rod base of Φ 90, forge on the SKK-10 precise forging machine, the Forge Heating temperature is at 979 ℃, and temperature retention time is 60min, and deflection is 25%, and finish forge is aligned after finishing, and the type of cooling adopts air cooling, obtains the excellent base behind the finish forge; Excellent base is rolled, selecting milling train for use is three open-train mills of ZC250, rated power is 215KW, rotating speed is 975r/min, pass through Φ 45mm circle in the operation of rolling successively, 41 * 41mm is square, 38 * 38mm is square, 30 * 30mm is square, the 42mm flat, 23 * 23mm is square, the 35mm flat, 16 * 16mm is square, the 26mm flat, Φ 16mm circle, the 23mm flat, 12.5 * 12.5mm is square, the 20mm flat, the pass of Φ 12mm circle interlocks rolling, temperature is 970 ℃ in the rod base operation of rolling, temperature retention time is 50min, select the air cooling cooling after rolling the finishing, promptly get the titanium alloy small-sized bar of Φ 12mm.
The mirco structure photo of the titanium alloy small-sized bar of the Φ 12mm that makes is shown in a among Fig. 1, b, and microscopic structure all is typical bifurcation tissue, and the different parts microscopic structure from the edge to heart portion is more even, illustrates that excellent base forging deformation is evenly abundant.
Embodiment 2:
Get specification and be the titanium alloy rod base of Φ 90, forge on the SKK-10 precise forging machine, the Forge Heating temperature is at 969 ℃, and temperature retention time is 70min, and deflection is 25%, and finish forge is aligned after finishing, and the type of cooling adopts air cooling, obtains the excellent base behind the finish forge; Excellent base is rolled, selecting milling train for use is three open-train mills of ZC250, rated power is 215KW, rotating speed is 975r/min, pass through Φ 45mm circle in the operation of rolling successively, 41 * 41mm is square, 38 * 38mm is square, 30 * 30mm is square, the 42mm flat, 23 * 23mm is square, the 35mm flat, 16 * 16mm is square, the 26mm flat, Φ 16mm circle, the 23mm flat, 10.5 * 10.5mm is square, the 17mm flat, the pass of Φ 10mm circle interlocks rolling, temperature is 940 ℃ in the rod base operation of rolling, temperature retention time is 45min, select the air cooling cooling after rolling the finishing, promptly get the titanium alloy small-sized bar of Φ 10mm.
The mirco structure photo of the titanium alloy small-sized bar of the Φ 10mm that makes is shown in a among Fig. 2, b, and microscopic structure all is the alpha+beta tissue, the primary tiny axle shape that waits that coordinates, and the different parts microscopic structure from the edge to heart portion is more even.
Embodiment 3:
Get specification and be the titanium alloy rod base of Φ 90, forge on the SKK-10 precise forging machine, the Forge Heating temperature is at 949 ℃, and temperature retention time is 65min, and deflection is 25%, and finish forge is aligned after finishing, and the type of cooling adopts air cooling, obtains the excellent base behind the finish forge; Excellent base is rolled, selecting milling train for use is three open-train mills of ZC250, rated power is 215KW, rotating speed is 975r/min, pass through Φ 45mm circle in the operation of rolling successively, 41 * 41mm is square, 38 * 38mm is square, 30 * 30mm is square, the 42mm flat, 23 * 23mm is square, the 35mm flat, 16 * 16mm is square, the 26mm flat, Φ 16mm circle, the 23mm flat, 8.5 * 8.5mm is square, the 14mm flat, the pass of Φ 8mm circle interlocks rolling, temperature is 950 ℃ in the rod base operation of rolling, temperature retention time is 40min, select the air cooling cooling after rolling the finishing, promptly get the titanium alloy small-sized bar of Φ 8mm.
The mirco structure photo of the titanium alloy small-sized bar of the Φ 8mm that makes shown in a among Fig. 3, b, the primary tiny axle shape that waits that Mass distributes that coordinates in the alloy structure, the different parts microscopic structure of tissue from the edge to heart portion is more even.
So can draw, adopt preparation method of the present invention can obtain structural homogenity Φ 8mm-Φ 12mm TC20 titanium alloy small-sized bar preferably.
Claims (3)
1. the preparation method of a TC 20 titanium alloy small dimension bar for surgical implant is characterized in that, carries out according to the following steps:
Step 1.
Get specification and be the titanium alloy rod base of Φ 90, forge on precise forging machine, the Forge Heating temperature is 949-979 ℃, and temperature retention time is 60min-70min, and deflection is 25%, and finish forge is aligned after finishing, and air cooling obtains the excellent base behind the finish forge;
Step 2.
Excellent base behind the finish forge that step 1 is obtained is rolled by milling train, rotating speed is 975r/min, pass through Φ 45mm circle in the operation of rolling successively, 41 * 41mm is square, 38 * 38mm is square, 30 * 30mm is square, the 42mm flat, 23 * 23mm is square, the 35mm flat, 16 * 16mm is square, the 26mm flat, Φ 16mm circle, the 23mm flat, 8.5 * 8.5-12.5 * 12.5 are square, the 14-20 flat, the pass of Φ 8-Φ 12mm circle interlocks rolling, temperature is 940 ℃-970 ℃ in the wherein excellent base operation of rolling, temperature retention time is 40min-50min, air cooling after rolling the finishing, promptly.
2. method according to claim 1 is characterized in that, described precise forging machine adopts SKK-10 type precise forging machine.
3. method according to claim 1 is characterized in that, described milling train adopts three open-train mills of ZC250.
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| CN 200910254551 CN101773978B (en) | 2009-12-28 | 2009-12-28 | Method for preparing TC20 titanium alloy small dimension bar for surgical implant |
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| CN 200910254551 CN101773978B (en) | 2009-12-28 | 2009-12-28 | Method for preparing TC20 titanium alloy small dimension bar for surgical implant |
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| CN101773978B true CN101773978B (en) | 2011-07-27 |
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| CN104775053B (en) * | 2015-04-28 | 2017-06-13 | 宝鸡鑫诺新金属材料有限公司 | Preparation technology for manufacturing the medical Ti 6Al 7Nb B alloy wires of Kirschner wire |
| CN106180251B (en) * | 2016-08-16 | 2018-05-08 | 西部超导材料科技股份有限公司 | A kind of preparation method of TC20 titanium alloys fine grain bar |
| CN110605353B (en) * | 2019-08-07 | 2021-02-19 | 江苏天工科技股份有限公司 | Efficient short-flow precision forging and cogging process for titanium and titanium alloy ingots |
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Effective date of registration: 20121205 Address after: 710018 Shaanxi Province Economic and Technological Development Zone Xi'an Mingguang Road No. 12 Patentee after: Western Superconducting Technologies Co., Ltd. Address before: 710018 Shaanxi Province Economic and Technological Development Zone Xi'an Mingguang Road No. 12 Patentee before: Western Superconducting Technologies Co., Ltd. |