CN104148439B - A kind of milling method of high precision titanium alloy pipe - Google Patents
A kind of milling method of high precision titanium alloy pipe Download PDFInfo
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- CN104148439B CN104148439B CN201410321985.8A CN201410321985A CN104148439B CN 104148439 B CN104148439 B CN 104148439B CN 201410321985 A CN201410321985 A CN 201410321985A CN 104148439 B CN104148439 B CN 104148439B
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- titanium alloy
- alloy pipe
- milling method
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 29
- 238000003801 milling Methods 0.000 title claims abstract description 21
- 238000005096 rolling process Methods 0.000 claims abstract description 53
- 230000003746 surface roughness Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 16
- 239000000314 lubricant Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000005554 pickling Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- HPSUPGAVFFFPMQ-UHFFFAOYSA-N 1,2,3,4,6,7,10-heptachlorododecane Chemical compound CCC(Cl)CCC(Cl)C(Cl)CC(Cl)C(Cl)C(Cl)CCl HPSUPGAVFFFPMQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 239000010721 machine oil Substances 0.000 claims description 6
- 239000012188 paraffin wax Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000002604 ultrasonography Methods 0.000 claims description 2
- 239000000047 product Substances 0.000 description 16
- 238000004140 cleaning Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000002585 base Substances 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 238000005498 polishing Methods 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Abstract
The present invention relates to the milling method of a kind of high precision titanium alloy pipe, the method is that the mode that the titanium alloy pipe prepared uses two rollers and three rollers combine rolls, milling method is single feeding dual AC power, controlling two rolling Q-value is 0.4～2, multiroll rolling Q-value is 0.4～9, gap value is 0.2～2mm, the finished product tubing rolled obtains outer surface roughness Ra≤0.6 μm after processing by the way of outer surface rubbing down and inner surface hone, inside surface roughness Ra≤0.2 μm, outside dimension tolerance≤0.04mm, internal diameter size tolerance≤0.03, the titanium alloy pipe of the 3% of wall thickness dimension tolerance≤nominal wall thickness.Compared with the existing technology, the product size tolerance grade obtained is higher, surfaces externally and internally better quality for the present invention.
Description
Technical field
The present invention relates to technical field of metal, particularly relate to the milling method of a kind of high precision titanium alloy pipe.
Background technology
Deep development along with China's Aero-Space, petrochemical industry and nuclear industry, to high accuracy, high intensity, titanium alloy pipe corrosion-resistant, resistant to elevated temperatures demand more and more extensive, the requirement to the dimensional tolerance of titanium alloy pipe, surfaces externally and internally quality is harsher simultaneously.
At present, the preparation method of titanium alloy pipe has following several ways: hole after 1, rod base being carried out machine work again；2, extruding or oblique milling mode is used to bore a hole base, warm-rolling or cold rolling after bore hole；3, directly with sheet material volume weldering.Wherein produce in the method for titanium alloy pipe with rolling mode, owing to titanium alloy exists the characteristics such as elastic modelling quantity is low, specific strength is high, resistance of deformation is big, the operation of rolling of tubing easily ftractures, cause that product size tolerance grade is low, surface quality is bad, it is difficult to meet Aero-Space, petrochemical industry and nuclear industry to titanium alloy pipe high accuracy, high performance requirement.
The most domestic rolling technique for high precision titanium alloy pipe is also in conceptual phase.
Chinese patent CN 102389900 A provides the high accuracy processing method of a kind of TA18 aviation titanium pipe, and the method is: one, TA18 pipe is carried out straightening processing；Two, at tube blank inner wall uniform application chlorinated paraffin-52, load the first mandrel rolling and become the semi-finished product tubing of required size；Three, the first plug in semi-finished product tubing is taken out, load the second mandrel rolling after smearing chlorinated paraffin-52 and become the tubing of required size；Four, repeat step 3 1～8 times, obtain TA18 aviation titanium pipe.By roughness Ra≤0.8 μm of the TA18 aviation titanium tube outer surface that this patented method is processed, the roughness of inner surface is Ra≤1.6 μm, outside dimension tolerance is not more than 0.05mm, internal diameter size tolerance is not more than 0.04mm, wall thickness dimension tolerance is not more than the 5% of wall thickness nominal size, its result is relatively preferable, but also and not fully up to expectations.
Summary of the invention
It is an object of the invention to overcome the defect of above-mentioned prior art, it is provided that a kind of product size tolerance grade is higher, the milling method of surface quality more preferable high precision titanium alloy pipe.
To achieve these goals, the technical solution used in the present invention is:
A kind of milling method of high precision titanium alloy pipe, it is characterized in that: the mode that the titanium alloy pipe prepared uses two rollers and three rollers combine rolls, milling method is single feeding dual AC power mode, controlling two rolling Q-value is 0.4～2, multiroll rolling Q-value is 0.4～9, gap value is 0.2～2mm, the finished product tubing rolled obtains outer surface roughness Ra≤0.6 μm after processing by the way of outer surface rubbing down and inner surface hone, inside surface roughness Ra≤0.2 μm, outside dimension tolerance≤0.04mm, internal diameter size tolerance≤0.03, the titanium alloy pipe of the 3% of wall thickness dimension tolerance≤nominal wall thickness.
Described titanium alloy pipe is extrusion tube blank, or roll piercing pipe, or rod base machine adds boring pipe.
During described rolling, with chlorinated paraffin for inwall lubricant, with the mixed liquor of weight ratio 8～10:1 machine oil and paraffin for outer wall lubricant.
In the described operation of rolling, middle QC material carries out surfaces externally and internally process, pickling or alkali cleaning and washing after often rolling 1～3 passages, and bore hole processes.
In the described operation of rolling, often rolling 1～3 passages carry out heat treatment, described heat treatment employing 650～750 DEG C/1～the heat treating regime of 1.5h.
In the described operation of rolling, tubing was carried out initially with ultrasound wave or degreaser before carrying out heat treatment, then pickling, washing and drying and processing.
During described outer surface rubbing down, control rubbing down monolateral 0.1～0.9mm.
During described inner surface hone, control hone monolateral 0.02～0.2mm.
The present invention has a techniques below feature:
1, the present invention uses single milling method being sent into dual AC power, has effectively eliminated the salient point that rolling produces, and decreases rolling defect and defect source, improves more greatly the ovality of tubing simultaneously.
2, the present invention is by controlling Q-value and gap value, uses little Q-value (that is: increase sizing reduction, reduce wall thickness reducing amount) when two rollings, gives full play to the centering capacity of two rollers, the dimensional tolerance of tubing has been effectively ensured.
3, the present invention uses the method for polishing and burnishing machine and hone to carry out tubing surfaces externally and internally process, while ensureing tubing surfaces externally and internally, further improves dimensional accuracy.
In sum, by the method for the present invention, dimensional tolerance precision can be obtained high, surfaces externally and internally matter measured high precision titanium alloy pipe, this titanium alloy pipe, outer surface roughness Ra≤0.6 μm, roughness Ra≤0.2 μm of inner surface, outside dimension tolerance≤0.04mm, internal diameter size tolerance≤0.03, the 3% of wall thickness dimension tolerance≤nominal wall thickness, inner circle precision can reach 0.02mm, circularity≤0.03mm.
The present invention, has from the angle of technique compared with Chinese patent CN 102389900 A:
1, single rolling mode being sent into dual AC power is added.
2, the Q-value in the operation of rolling and gap value are controlled.
3, the method that have employed polishing and burnishing machine and hone processes tube surfaces.
4, the pipe material product roughness finally obtained by this method should dimensional tolerance all comparisons than patent.
Detailed description of the invention
Below in conjunction with example, the detailed description of the invention of the present invention is elaborated.It should be understood that example is for illustrating rather than limitation of the present invention.The scope of the present invention is determined according to claims with core content.
Embodiment 1:
Use TA18 φ 70 × 5mm extrusion tube blank, through LG60 two roller cold pilger mill and LD60 tri-roller cold pilger mill, produce φ 35 × 3.5mm.For single feeding dual AC power, (single dual AC power that is sent into refers to once be sent into milling method within a rolling cycle of pipe mill, respectively carries out the most about 57 ° of revolutions at forward and backward dead point.), two rolling Q-value are 0.41～0.47, and three-roll rolling Q-value is 0.5～1.46, and gap value is 0.2～1mm.During rolling, the chlorinated paraffin of employing is inwall lubricant, and the mixed liquor using machine oil and paraffin is outer wall lubricant (weight ratio 8～10:1).After rolling, tubing the most first carries out ultrasonic waves for cleaning oil removing, then uses pickling (HF:HNO3: H2O=5～12:45～60:100(volume ratio) in mixed liquor, soak 3～10min), washing and drying and processing.The mode carrying out inner surface bore hole after rolling 1 passage processes.After often rolling 1 passage, middle product and finished product heat treatment employing 650～750 DEG C/1～the heat treating regime of 1.5h.Final finished tubing carries out outer surface rubbing down (the monolateral 0.5mm of rubbing down), and the mode of inner surface hone (the monolateral 0.1mm of hone) processes.The roughness of detection finished product tubing: outer surface roughness Ra0.6 μm, the roughness of inner surface is Ra0.2 μm；Dimensional tolerance: outside dimension deviation ± 0.04mm, internal diameter size deviation ± 0.03, wall thickness dimension deviation ± 0.1mm.
Embodiment 2:
Use TA18 φ 90 × 10mm roll piercing pipe, through LG120, LG60, LG30 two roller cold pilger mill and LD60, LD30 tri-roller cold pilger mill, produce φ 20 × 1mm.For single feeding dual AC power, (single dual AC power that is sent into refers to once be sent into milling method within a rolling cycle of pipe mill, respectively carries out the most about 57 ° of revolutions at forward and backward dead point.), two rolling Q-value are 0.4～1.1, and three-roll rolling Q-value is 0.4～5, and gap value is 0.3～1.5mm.During rolling, the chlorinated paraffin of employing is inwall lubricant, and the mixed liquor using machine oil and paraffin is outer wall lubricant (weight ratio 8～10:1).After rolling, tubing the most first carries out ultrasonic waves for cleaning oil removing, then uses pickling (HF:HNO3: H2O=5～12:45～60:100(volume ratio) in mixed liquor, soak 3～10min), washing and drying and processing.The mode roll the 1st, carrying out inner surface bore hole after 3 passages processes.After often rolling 1 passage, middle product and finished product heat treatment employing 700～750 DEG C/1～the heat treating regime of 1.5h.Final finished tubing carries out outer surface rubbing down (the monolateral 0.4mm of rubbing down), and the mode of inner surface hone (the monolateral 0.15mm of hone) processes.The roughness of detection finished product tubing: outer surface roughness Ra0.5 μm, the roughness of inner surface is Ra0.1 μm；Dimensional tolerance: outside dimension tolerance+0.03mm, internal diameter size tolerance+0.02, wall thickness dimension tolerance+0.03mm.
Embodiment 3:
Use TC4 φ 80 × 10mm extrusion tube blank, through LG90, LG60 two roller cold pilger mill and LD60 tri-roller cold pilger mill, produce φ 40 × 1.2mm.For single feeding dual AC power, (single dual AC power that is sent into refers to once be sent into milling method within a rolling cycle of pipe mill, respectively carries out the most about 57 ° of revolutions at forward and backward dead point.), two rolling Q-value are 0.5～0.9, and three-roll rolling Q-value is 0.8～3, and gap value is 0.2～1.2mm.During rolling, the chlorinated paraffin of employing is inwall lubricant, and the mixed liquor using machine oil and paraffin is outer wall lubricant (weight ratio 8～10:1).After rolling, tubing the most first carries out ultrasonic waves for cleaning oil removing, then uses pickling (HF:HNO3: H2O=5～12:45～60:100(volume ratio) in mixed liquor, soak 3～10min), washing and drying and processing.The mode roll the 1st, carrying out inner surface bore hole after 2 passages processes.After often rolling 1 passage, middle product and finished product heat treatment employing 750～800 DEG C/1～the heat treating regime of 1.5h.Final finished tubing carries out outer surface rubbing down (the monolateral 0.5mm of rubbing down), and the mode of inner surface hone (the monolateral 0.2mm of hone) processes.The roughness of detection finished product tubing: outer surface roughness Ra0.5 μm, the roughness of inner surface is Ra0.2 μm；Dimensional tolerance: outside dimension tolerance+0.03mm, internal diameter size tolerance+0.02, wall thickness dimension tolerance+0.03mm.
Embodiment 4:
Use Gr.38 φ 84 × 10mm extrusion tube blank, through LG90, LG60, LG30 two roller cold pilger mill and LD60, LD30 tri-roller cold pilger mill, produce φ 19 × 0.9mm.For single feeding dual AC power, (single dual AC power that is sent into refers to once be sent into milling method within a rolling cycle of pipe mill, respectively carries out the most about 57 ° of revolutions at forward and backward dead point.), two rolling Q-value are 0.5～1.5, and three-roll rolling Q-value is 0.6～4, and gap value is 0.2～1.6mm.During rolling, the chlorinated paraffin of employing is inwall lubricant, and the mixed liquor using machine oil and paraffin is outer wall lubricant (weight ratio 8～10:1).After rolling, tubing the most first carries out ultrasonic waves for cleaning oil removing, then uses pickling (HF:HNO3: H2O=5～12:45～60:100(volume ratio) in mixed liquor, soak 3～10min), washing and drying and processing.Roll the 1st, 2, the mode that carries out inner surface bore hole after 4 passages processes.After often rolling 1 passage, middle product and finished product heat treatment employing 750～800 DEG C/1～the heat treating regime of 1.5h.Final finished tubing carries out outer surface rubbing down (the monolateral 0.4mm of rubbing down), and the mode of inner surface hone (the monolateral 0.16mm of hone) processes.The roughness of detection finished product tubing: outer surface roughness Ra0.6 μm, the roughness of inner surface is Ra0.2 μm；Dimensional tolerance: outside dimension tolerance+0.03mm, internal diameter size tolerance+0.02, wall thickness dimension tolerance+0.02mm.
Claims (6)
1. the milling method of a high precision titanium alloy pipe, it is characterized in that: the mode that the titanium alloy pipe prepared uses two rollers and three rollers combine rolls, milling method is single feeding dual AC power mode, controlling two rolling Q-value is 0.4～2, multiroll rolling Q-value is 0.4～9, gap value is 0.2～2mm, the finished product tubing rolled obtains outer surface roughness Ra≤0.6 μm after processing by the way of outer surface rubbing down and inner surface hone, inside surface roughness Ra≤0.2 μm, outside dimension tolerance≤0.04mm, internal diameter size tolerance≤0.03, the titanium alloy pipe of the 3% of wall thickness dimension tolerance≤nominal wall thickness；
During described outer surface rubbing down, control rubbing down monolateral 0.1～0.9mm；
During described inner surface hone, control hone monolateral 0.02～0.2mm.
2. according to the milling method of the high precision titanium alloy pipe described in claim 1, it is characterised in that described titanium alloy pipe is extrusion tube blank, or roll piercing pipe, or rod base machine adds boring pipe.
3. according to the milling method of the high precision titanium alloy pipe described in claim 1, it is characterised in that during described rolling, with chlorinated paraffin for inwall lubricant, with the mixed liquor of weight ratio 8～10:1 machine oil and paraffin for outer wall lubricant.
4., according to the milling method of the high precision titanium alloy pipe described in claim 1, it is characterised in that in the described operation of rolling, middle QC material carries out bore hole process after often rolling 1～3 passages.
5., according to the milling method of the high precision titanium alloy pipe described in claim 1, it is characterised in that in the described operation of rolling, often rolling 1～3 passages carry out heat treatment, described heat treatment employing 650～750 DEG C/1～the heat treating regime of 1.5h.
6. according to the milling method of the high precision titanium alloy pipe described in claim 1 or 5, it is characterised in that in the described operation of rolling, tubing was carried out initially with ultrasound wave or degreaser before carrying out heat treatment, then pickling, washing and drying and processing.
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| CN201410321985.8A CN104148439B (en) | 2014-07-08 | 2014-07-08 | A kind of milling method of high precision titanium alloy pipe |
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| CN105220097B (en) * | 2015-11-17 | 2017-04-12 | 西部钛业有限责任公司 | Method for controlling precipitation direction of intermetallic compounds in titanium alloy tube |
| CN107790493A (en) * | 2017-10-23 | 2018-03-13 | 陕西海恩得工贸有限公司 | A kind of milling method of stud |
| CN113441553B (en) * | 2021-06-30 | 2022-07-22 | 北京科技大学 | Seamless pipe and cold rolling method thereof |
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| CN102389900A (en) * | 2011-09-17 | 2012-03-28 | 西部钛业有限责任公司 | High-precision processing method for Ti-3Al-2.5V (TA18) aviation titanium tube |
| CN102626724A (en) * | 2012-04-19 | 2012-08-08 | 常熟市异型钢管有限公司 | Method for producing titanium alloy pipe |
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| CN102974645A (en) * | 2012-11-16 | 2013-03-20 | 袁亚军 | High-accuracy TA18 titanium alloy pipe preparation method |
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| CN102626724A (en) * | 2012-04-19 | 2012-08-08 | 常熟市异型钢管有限公司 | Method for producing titanium alloy pipe |
| CN103627927A (en) * | 2012-08-24 | 2014-03-12 | 东港市东方高新金属材料有限公司 | Titanium alloy extruded pipe or rolled pipe and preparation method thereof |
| CN102873098A (en) * | 2012-09-26 | 2013-01-16 | 西北有色金属研究院 | Manufacturing method for ultrathin-wall titanium tubing |
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Effective date of registration: 20200119 Address after: 753000 metallurgical Road, Dawukou District, the Ningxia Hui Autonomous Region, Shizuishan Patentee after: Ningxia Zhongse Jinhang Titanium Industry Co., Ltd Address before: 753000 metallurgical Road, Dawukou District, the Ningxia Hui Autonomous Region, Shizuishan Patentee before: Dongfang Tantalum Industry Co., Ltd., Ningxia |
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