CN104588974A - Method for preparing high-precision titanium alloy bar - Google Patents
Method for preparing high-precision titanium alloy bar Download PDFInfo
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- CN104588974A CN104588974A CN201410674801.6A CN201410674801A CN104588974A CN 104588974 A CN104588974 A CN 104588974A CN 201410674801 A CN201410674801 A CN 201410674801A CN 104588974 A CN104588974 A CN 104588974A
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- titanium alloy
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- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention discloses a method for preparing a high-precision titanium alloy bar. The method includes the steps of blank preparing, blanking, cogging forging, deforming machining, annealing processing, heat straightening, turning machining, sheet finishing and finished product checking and packaging. When turning machining is conducted on the bar, the diameter of the bar can be directly machined to the size of the finished bar, sweeps generated when the bar is turned can be recycled, and the economic value is increased; when the heating temperature is low in finishing processing, the influence on the metallographic structure of the bar is small, the service life of the bar is prolonged, and the mechanical strength of the bar is improved; meanwhile, a surface scale of the bar can be made to be extremely thin due to the low heating temperature, the overall indentation of the bar in the straightening process is small, and grinding processing is not needed after straightening, the requirements for the roughness of 1.5 microns and the dimensional tolerance of the finished bar can be met through two-time direct polishing.
Description
Technical field
The present invention relates to metal material processing field, particularly relate to a kind of preparation method of high precision titanium alloy bar material.
Technical background
The preparation method of existing medical titanium alloy bar, generally adopt destressing to align method when finishing process, before finishing process during turnery processing, the minimum need of bar stay the surplus of 30-40 silk, and bar temp is higher when adopting the method to heat, common pure titanium bar need be heated to 550-600 DEG C, titanium alloy rod bar need be heated to 650-700 degree, under such hot conditions, the oxide skin of Surface of Rod Bar is thicker, the overall deliquescing of material, during aligning, the overall impression of bar is darker, minimum of a value also can reach 10 and only can not eliminate these unfavorable factors by polishing, therefore these unfavorable factors could must be eliminated by grinding, grinding roughness reaches 6.4um, also must to carry out the requirement that twice polishing just can reach finished product bar, and and Mo cut processing time-consuming, together with the abrasive dust produced adulterates with sand grains, recovery value is lower, therefore be necessary to improve.
Summary of the invention
The technical problem that the present invention solves: the preparation method that a kind of high precision titanium alloy bar material is provided, without the need to grinding after finishing process, directly enter polishing machine and carry out roughness 1.5um and the size tolerance requirements that twice polishing can reach the requirement of finished product bar.
The present invention adopts following technical scheme:
A preparation method for high precision titanium alloy bar material, comprises following step:
(1) blank prepares, and selects the titanium alloy ingot meeting GB/T13810-2007 standard-required as blank:
(2) cogging forging, puts into resistance furnace by titanium alloy blank and is heated to 1000-1200 DEG C, and insulation 4-8 hour, makes titanium alloy blank deformation rate reach 50-65% with hammering equipment, obtain titanium alloy billet;
(3) titanium alloy billet is cut into the little titanium alloy billet that finished product bar needs weight;
(4) deformation processing, again puts into resistance furnace by little titanium alloy billet and is heated to 1000-1150 DEG C, and insulation 4-8 hour, makes little titanium alloy billet deformation rate reach 50-65% with hammering equipment, make titanium alloy rod bar;
(5) annealing in process, puts into heating furnace by titanium alloy rod bar and is heated to 800-850 DEG C, insulation 1.5-2 hour;
(6) thermal straightening, uses the thick straightener of 6 roller to carry out thermal straightening and air cooling the titanium alloy rod bar after insulation;
(7) by the titanium alloy rod bar after air cooling with Centreless lathe turning to finished product bar size;
(8) finishing process, puts into cabinet-type electric furnace by the titanium alloy rod bar after turning and is heated to 500-550 DEG C, puts into 10 rollers essence straighteners and aligns, then directly enter polishing machine and carry out twice polishing and can reach the requirement of finished product bar after taking-up.
Wherein, in above-mentioned steps 2 and step 3, described hammering equipment is hydraulic press, pneumatic hammer or Single arm.
Preferably, in above-mentioned steps 2, titanium alloy blank is put into resistance furnace and is heated to 1050-1150 DEG C, insulation 5-7 hour, makes titanium alloy blank deformation rate reach 55-60% with hammering equipment.
Preferably, in above-mentioned steps 4, little titanium alloy billet is put into resistance furnace again and is heated to 1000-1050 DEG C.
Preferably, in above-mentioned steps 8, the titanium alloy rod bar after turning is put into cabinet-type electric furnace and is heated to 520 DEG C.
The present invention's advantage compared with prior art:
When 1, carrying out turnery processing to bar before finishing process, diameter of rod can be machined directly to finished product bar size, the scrap produced during turning bar can be recycled again, and economic worth is very high;
2, during finishing process, heating-up temperature is lower, little on the metallographic structure impact of bar, does not almost change, extends the service life of bar, add the mechanical strength of bar;
3, during finishing process because heating-up temperature is lower, the oxide skin of Surface of Rod Bar is very thin, during aligning, the impression of bar entirety is less, does not need grinding and directly enter polishing machine to carry out twice polishing and can reach finished product bar to roughness 1.5um and size tolerance requirements after aligning;
4, save one grinding operation, save human and material resources and financial resources.
Detailed description of the invention
Below in conjunction with the diameter of rod grade of tolerance between h9-h10, diameter is 9.5mm, length is the preparation process of the high precision titanium alloy bar material of 3m, is described in further detail detailed description of the invention.
Embodiment 1:
First, select diameter to be 360mm, length is the titanium alloy blank of 1.7m, excises the part determining existing defects after ultrasonic examination, secondly, titanium alloy blank is put into resistance furnace and be heated to 1000 DEG C, heated at constant temperature is incubated 4 hours, select hydraulic press, one in pneumatic hammer or Single arm, titanium alloy blank deformation rate is made to reach 50%, titanium alloy blank is forged into the titanium alloy billet that square opening is 190mm, the blemish such as burr and crackle is removed in polishing, the cut-out of titanium alloy billet is become little titanium alloy billet by the weight/specification then needed according to finished product bar, 4th step, little titanium alloy billet is put into resistance furnace and is heated to 1000 DEG C, be incubated 4 hours, select hydraulic press, one in pneumatic hammer or Single arm makes little titanium alloy billet deformation rate reach 50%, little titanium alloy billet is forged into the titanium alloy rod bar that diameter is 60mm, 5th step, on inspection, the excision dehiscence part of titanium alloy rod bar thinning surface crackle, again recrystallization annealing process is done to titanium alloy rod bar, annealing temperature is 800 DEG C, temperature retention time is 1.5 hours, 6th step, to the titanium alloy rod bar after annealing in process, adopts the thick straightener of 6 roller to carry out thermal straightening, eliminates the larger camber distortion of titanium alloy rod bar and air cooling, 7th step, by the titanium alloy rod bar after air cooling with 30 type Centreless lathe turning to finished product bar size, only need stay the surplus of about 0.05mm, 8th step, titanium alloy rod bar after turning is put into cabinet-type electric furnace and is heated to 500 DEG C, 10 roller essence straightener alignings are put into after taking-up, because titanium alloy rod bar temperature only has 500 DEG C during finishing process, the oxide skin produced on titanium alloy rod bar surface is very thin, and the impression of titanium alloy rod bar entirety is very shallow, only has 0.006-0.009mm, so do not need to carry out grinding to titanium alloy rod bar, directly enter polishing machine and carry out twice polishing and can reach finished product bar to smart rugosity 1.5um and size tolerance requirements.Finally adopt laser diameter measuring instrument to carry out external diameter detection to finished product bar, and its chemical composition, physical property and crystalline phase tissue are tested by standard-required, through carrying out packaging delivery after the assay was approved.
Embodiment 2:
First, select diameter to be 360mm, length is the titanium alloy blank of 1.7m, excises the part determining existing defects after ultrasonic examination, secondly, titanium alloy blank is put into resistance furnace and be heated to 1200 DEG C, heated at constant temperature is incubated 8 hours, select hydraulic press, one in pneumatic hammer or Single arm, titanium alloy blank deformation rate is made to reach 65%, titanium alloy blank is forged into the titanium alloy billet that square opening is 190mm, the blemish such as burr and crackle is removed in polishing, the cut-out of titanium alloy billet is become little titanium alloy billet by the weight/specification then needed according to finished product bar, 4th step, little titanium alloy billet is put into resistance furnace and is heated to 1150 DEG C, be incubated 8 hours, select hydraulic press, one in pneumatic hammer or Single arm makes little titanium alloy billet deformation rate reach 65%, little titanium alloy billet is forged into the titanium alloy rod bar that diameter is 60mm, 5th step, on inspection, the excision dehiscence part of titanium alloy rod bar thinning surface crackle, again recrystallization annealing process is done to titanium alloy rod bar, annealing temperature is 850 DEG C, temperature retention time is 2 hours, 6th step, to the titanium alloy rod bar after annealing in process, adopts the thick straightener of 6 roller to carry out thermal straightening, eliminates the larger camber distortion of titanium alloy rod bar and air cooling, 7th step, by the titanium alloy rod bar after air cooling with 30 type Centreless lathe turning to finished product bar size, only need stay the surplus of about 0.05mm, 8th step, titanium alloy rod bar after turning is put into cabinet-type electric furnace and is heated to 550 DEG C, 10 roller essence straightener alignings are put into after taking-up, because titanium alloy rod bar temperature only has 550 DEG C during finishing process, the oxide skin produced on titanium alloy rod bar surface is very thin, and the impression of titanium alloy rod bar entirety is very shallow, only has 0.007-0.010mm, so do not need to carry out grinding to titanium alloy rod bar, directly enter polishing machine and carry out twice polishing and can reach finished product bar to smart rugosity 1.5um and size tolerance requirements.Finally adopt laser diameter measuring instrument to carry out external diameter detection to finished product bar, and its chemical composition, physical property and crystalline phase tissue are tested by standard-required, through carrying out packaging delivery after the assay was approved.
Embodiment 3:
First, select diameter to be 360mm, length is the titanium alloy blank of 1.7m, excises the part determining existing defects after ultrasonic examination, secondly, titanium alloy blank is put into resistance furnace and be heated to 1050 DEG C, heated at constant temperature is incubated 5 hours, select hydraulic press, one in pneumatic hammer or Single arm, titanium alloy blank deformation rate is made to reach 55%, titanium alloy blank is forged into the titanium alloy billet that square opening is 190mm, the blemish such as burr and crackle is removed in polishing, the cut-out of titanium alloy billet is become little titanium alloy billet by the weight/specification then needed according to finished product bar, 4th step, little titanium alloy billet is put into resistance furnace and is heated to 1000 DEG C, be incubated 4 hours, select hydraulic press, one in pneumatic hammer or Single arm makes little titanium alloy billet deformation rate reach 50%, little titanium alloy billet is forged into the titanium alloy rod bar that diameter is 60mm, 5th step, on inspection, the excision dehiscence part of titanium alloy rod bar thinning surface crackle, again recrystallization annealing process is done to titanium alloy rod bar, annealing temperature is 850 DEG C, temperature retention time is 2 hours, 6th step, to the titanium alloy rod bar after annealing in process, adopts the thick straightener of 6 roller to carry out thermal straightening, eliminates the larger camber distortion of titanium alloy rod bar and air cooling, 7th step, by the titanium alloy rod bar after air cooling with 30 type Centreless lathe turning to finished product bar size, only need stay the surplus of about 0.05mm, 8th step, titanium alloy rod bar after turning is put into cabinet-type electric furnace and is heated to 520 DEG C, 10 roller essence straightener alignings are put into after taking-up, because titanium alloy rod bar temperature only has 520 DEG C during finishing process, the oxide skin produced on titanium alloy rod bar surface is very thin, and the impression of titanium alloy rod bar entirety is very shallow, only has 0.008mm, so do not need to carry out grinding to titanium alloy rod bar, directly enter polishing machine and carry out twice polishing and can reach finished product bar to smart rugosity 1.5um and size tolerance requirements.Finally adopt laser diameter measuring instrument to carry out external diameter detection to finished product bar, and its chemical composition, physical property and crystalline phase tissue are tested by standard-required, through carrying out packaging delivery after the assay was approved.
Embodiment 4:
First, select diameter to be 360mm, length is the titanium alloy blank of 1.7m, excises the part determining existing defects after ultrasonic examination, secondly, titanium alloy blank is put into resistance furnace and be heated to 1150 DEG C, heated at constant temperature is incubated 7 hours, select hydraulic press, one in pneumatic hammer or Single arm, titanium alloy blank deformation rate is made to reach 60%, titanium alloy blank is forged into the titanium alloy billet that square opening is 190mm, the blemish such as burr and crackle is removed in polishing, the cut-out of titanium alloy billet is become little titanium alloy billet by the weight/specification then needed according to finished product bar, 4th step, little titanium alloy billet is put into resistance furnace and is heated to 1050 DEG C, be incubated 8 hours, select hydraulic press, one in pneumatic hammer or Single arm makes little titanium alloy billet deformation rate reach 65%, little titanium alloy billet is forged into the titanium alloy rod bar that diameter is 60mm, 5th step, on inspection, the excision dehiscence part of titanium alloy rod bar thinning surface crackle, again recrystallization annealing process is done to titanium alloy rod bar, annealing temperature is 850 DEG C, temperature retention time is 2 hours, 6th step, to the titanium alloy rod bar after annealing in process, adopts the thick straightener of 6 roller to carry out thermal straightening, eliminates the larger camber distortion of titanium alloy rod bar and air cooling, 7th step, by the titanium alloy rod bar after air cooling with 30 type Centreless lathe turning to finished product bar size, only need stay the surplus of about 0.05mm, 8th step, titanium alloy rod bar after turning is put into cabinet-type electric furnace and is heated to 520 DEG C, 10 roller essence straightener alignings are put into after taking-up, because titanium alloy rod bar temperature only has 520 DEG C during finishing process, the oxide skin produced on titanium alloy rod bar surface is very thin, and the impression of titanium alloy rod bar entirety is very shallow, only has 0.0075mm, so do not need to carry out grinding to titanium alloy rod bar, directly enter polishing machine and carry out twice polishing and can reach finished product bar to smart rugosity 1.5um and size tolerance requirements.Finally adopt laser diameter measuring instrument to carry out external diameter detection to finished product bar, and its chemical composition, physical property and crystalline phase tissue are tested by standard-required, through carrying out packaging delivery after the assay was approved.
Above-described embodiment, just preferred embodiment of the present invention, is not used for limiting the scope of the present invention, therefore all equivalence changes done with content described in the claims in the present invention, all should be included within the claims in the present invention scope.
Claims (5)
1. a preparation method for high precision titanium alloy bar material, is characterized in that, comprises following step:
(1) blank prepares, and selects the titanium alloy ingot meeting GB/T13810-2007 standard-required as blank:
(2) cogging forging, puts into resistance furnace by titanium alloy blank and is heated to 1000-1200 DEG C, and insulation 4-8 hour, makes titanium alloy blank deformation rate reach 50-65% with hammering equipment, obtain titanium alloy billet;
(3) titanium alloy billet is cut into the little titanium alloy billet that finished product bar needs weight;
(4) deformation processing, again puts into resistance furnace by little titanium alloy billet and is heated to 1000-1150 DEG C, and insulation 4-8 hour, makes little titanium alloy billet deformation rate reach 50-65% with hammering equipment, make titanium alloy rod bar;
(5) annealing in process, puts into heating furnace by titanium alloy rod bar and is heated to 800-850 DEG C, insulation 1.5-2 hour;
(6) thermal straightening, uses the thick straightener of 6 roller to carry out thermal straightening and air cooling the titanium alloy rod bar after insulation;
(7) by the titanium alloy rod bar after air cooling with Centreless lathe turning to finished product bar size;
(8) finishing process, puts into cabinet-type electric furnace by the titanium alloy rod bar after turning and is heated to 500-550 DEG C, puts into 10 rollers essence straighteners and aligns, then directly enter polishing machine and carry out twice polishing and can reach the requirement of finished product bar after taking-up.
2. the preparation method of high precision titanium according to claim 1 and titanium alloy rod bar, is characterized in that: in above-mentioned steps (2) and step (3), described hammering equipment is hydraulic press, pneumatic hammer or Single arm.
3. the preparation method of high precision titanium according to claim 1 and 2 and titanium alloy rod bar, it is characterized in that: in above-mentioned steps (2), titanium alloy blank is put into resistance furnace and is heated to 1050-1150 DEG C, insulation 5-7 hour, makes titanium alloy blank deformation rate reach 55-60% with hammering equipment.
4. the preparation method of high precision titanium according to claim 1 and 2 and titanium alloy rod bar, is characterized in that: in above-mentioned steps (4), little titanium alloy billet is put into resistance furnace again and is heated to 1000-1050 DEG C.
5. the preparation method of high precision titanium according to claim 1 and 2 and titanium alloy rod bar, is characterized in that: in above-mentioned steps (8), the titanium alloy rod bar after turning is put into cabinet-type electric furnace and is heated to 520 DEG C.
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| CN201410674801.6A CN104588974A (en) | 2014-11-21 | 2014-11-21 | Method for preparing high-precision titanium alloy bar |
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| CN201410674801.6A CN104588974A (en) | 2014-11-21 | 2014-11-21 | Method for preparing high-precision titanium alloy bar |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106826118A (en) * | 2017-02-08 | 2017-06-13 | 大连盛辉钛业有限公司 | A kind of preparation method for manufacturing the medical titanium alloy bar of pedicle screw |
| CN106853535A (en) * | 2016-12-19 | 2017-06-16 | 西安欧中材料科技有限公司 | A kind of preparation method of high-quality γ TiAl spherical powders |
| CN107443028A (en) * | 2017-09-25 | 2017-12-08 | 宝鸡市永盛泰钛业有限公司 | A kind of preparation method of high strength titanium alloy bar |
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| CN101157172A (en) * | 2007-10-19 | 2008-04-09 | 宝鸡市英耐特医用钛有限公司 | Method of preparing medical high-precision titanium and titanium alloy rod bar |
| US20090182449A1 (en) * | 2006-04-12 | 2009-07-16 | Sulzer Markets And Technology Ag | Machining Method |
| CN102990283A (en) * | 2012-11-13 | 2013-03-27 | 宝鸡市德立钛业有限责任公司 | Preparation method of medical high-precision titanium and titanium alloy bar material |
| CN103659280A (en) * | 2013-12-31 | 2014-03-26 | 宝鸡市铭海钛业有限公司 | Method for preparing high-accuracy titanium and titanium alloy bars |
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2014
- 2014-11-21 CN CN201410674801.6A patent/CN104588974A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090182449A1 (en) * | 2006-04-12 | 2009-07-16 | Sulzer Markets And Technology Ag | Machining Method |
| CN101157172A (en) * | 2007-10-19 | 2008-04-09 | 宝鸡市英耐特医用钛有限公司 | Method of preparing medical high-precision titanium and titanium alloy rod bar |
| CN102990283A (en) * | 2012-11-13 | 2013-03-27 | 宝鸡市德立钛业有限责任公司 | Preparation method of medical high-precision titanium and titanium alloy bar material |
| CN103659280A (en) * | 2013-12-31 | 2014-03-26 | 宝鸡市铭海钛业有限公司 | Method for preparing high-accuracy titanium and titanium alloy bars |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106853535A (en) * | 2016-12-19 | 2017-06-16 | 西安欧中材料科技有限公司 | A kind of preparation method of high-quality γ TiAl spherical powders |
| CN106826118A (en) * | 2017-02-08 | 2017-06-13 | 大连盛辉钛业有限公司 | A kind of preparation method for manufacturing the medical titanium alloy bar of pedicle screw |
| CN107443028A (en) * | 2017-09-25 | 2017-12-08 | 宝鸡市永盛泰钛业有限公司 | A kind of preparation method of high strength titanium alloy bar |
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Application publication date: 20150506 |