CN104148439A - Method for rolling high-precision titanium alloy pipes - Google Patents
Method for rolling high-precision titanium alloy pipes Download PDFInfo
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- CN104148439A CN104148439A CN201410321985.8A CN201410321985A CN104148439A CN 104148439 A CN104148439 A CN 104148439A CN 201410321985 A CN201410321985 A CN 201410321985A CN 104148439 A CN104148439 A CN 104148439A
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- titanium alloy
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- alloy pipe
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Abstract
The invention relates to a method for rolling high-precision titanium alloy pipes. A prepared titanium alloy pipe billet is rolled in a combination way of two rollers and three rollers, and the rolling method adopts single feeding and double slew. The value Q of two-roller rolling is 0.4-2, the value Q of multiple-roller rolling is 0.4-9, and the amount of clearance is 0.2-2mm. The rolled finished pipe is processed in a way of outer surface grinding and inner surface honing to obtain the titanium alloy pipes, wherein the outer surface roughness Ra is less than or equal to 0.6 micrometers, the inner surface roughness Ra is less than or equal to 0.2 micrometers, the outside-diameter size tolerance is less than or equal to 0.04mm, the inside-diameter size tolerance is less than or equal to 0.03mm, and the wall-thickness size tolerance is less than or equal to 3 percent of a nominal wall thickness. Compared with the prior art, the method has the advantages that the size tolerance precision of the obtained products is relatively high, and the inside and outside surface quality is relatively good.
Description
Technical field
The present invention relates to metal material technical field, particularly relate to a kind of milling method of high precision titanium alloy pipe.
Background technology
Along with the deep development of China's Aero-Space, petrochemical industry and nuclear industry, more and more extensive to high accuracy, high strength, demand corrosion-resistant, resistant to elevated temperatures titanium alloy pipe, the requirement of the dimensional tolerance to titanium alloy pipe, surfaces externally and internally quality is simultaneously also more and more harsher.
At present, the preparation method of titanium alloy pipe has following several mode: 1, excellent base is carried out holing after machine work again; 2, adopt extruding or the oblique milling mode base of boring a hole, warm-rolling or cold rolling after bore hole; 3, directly with the weldering of sheet material volume.Wherein produce in the method for titanium alloy pipe with rolling mode, because titanium alloy exists the characteristics such as elastic modelling quantity is low, specific strength is high, resistance of deformation is large, in the operation of rolling of tubing, easily ftracture, cause that product size tolerance grade is low, surface quality is bad, be difficult to meet Aero-Space, petrochemical industry and nuclear industry to titanium alloy pipe high accuracy, high performance requirement.
The domestic rolling technique for high precision titanium alloy pipe is also in conceptual phase at present.
Chinese patent CN 102389900 A provide a kind of high accuracy processing method of TA18 aviation titanium pipe, and the method is: one, TA18 pipe is carried out to straightening processing; Two, evenly smear chlorinated paraffin-52 at tube blank inner wall, pack the first mandrel rolling into and become the semi-finished product tubing of required size; Three, the first plug in semi-finished product tubing is taken out, smear the tubing that packs the second mandrel rolling into after chlorinated paraffin-52 and become required size; Four, repeating step 3 1～8 times, obtains TA18 aviation titanium pipe.Roughness Ra≤0.8 μ the m of the TA18 aviation titanium tube outer surface of processing by this patented method, the roughness of inner surface is Ra≤1.6 μ m, 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 5% of wall thickness nominal size, its result is relatively better, but also also not fully up to expectations.
Summary of the invention
The object of the invention is to overcome the defect of above-mentioned prior art, provide a kind of product size tolerance grade higher, the milling method of the better high precision titanium alloy pipe of surface quality.
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: adopt the mode of two rollers and three roller combinations to be rolled the titanium alloy pipe preparing, milling method turns mode for singly sending double back to, controlling two rollings Q value processed is 0.4～2, multiroll rolling Q value is 0.4～9, gap value is 0.2～2mm, the finished product tubing that rolling is good obtains outer surface roughness Ra≤0.6 μ m after processing by the mode of outer surface rubbing down and inner surface hone, inside surface roughness Ra≤0.2 μ m, outside dimension tolerance≤0.04mm, internal diameter size tolerance≤0.03, 3% titanium alloy pipe of wall thickness dimension tolerance≤nominal wall thickness.
Described titanium alloy pipe is extrusion tube blank, or roll piercing pipe, or excellent base machine adds boring pipe.
When described rolling, taking chlorinated paraffin wax as inwall lubricant, taking the mixed liquor of weight ratio 8～10:1 machine oil and paraffin as outer wall lubricant.
In the described operation of rolling, after every rolling 1～3 passage of middle product tubing, carry out surfaces externally and internally processing, pickling or alkali cleaning and washing, and bore hole processing.
In the described operation of rolling, every rolling 1～3 passage is heat-treated, and described heat treatment adopts the heat treating regime of 650～750 DEG C/1～1.5h.
In the described operation of rolling, first tubing adopted ultrasonic wave or degreaser to clean before heat-treating, then pickling, washing and drying and processing.
When described outer surface rubbing down, control the monolateral 0.1～0.9mm of rubbing down.
When described inner surface hone, control the monolateral 0.02～0.2mm of hone.
The present invention has following technical characterstic:
1, the present invention adopts and singly sends two rotating milling methods to, has effectively eliminated the salient point that rolling produces, and has reduced rolling defect and defect source, simultaneously the larger ovality that improves tubing.
2, the present invention is by controlling Q value and gap value, adopts little Q value (that is: increase sizing reduction, minimizing wall thickness reducing amount) in two rollings time processed, gives full play to the centering capacity of two rollers, effectively ensured the dimensional tolerance of tubing.
3, the present invention adopts the method for polishing and burnishing machine and hone to carry out the processing of tubing surfaces externally and internally, in ensureing tubing surfaces externally and internally, has further improved dimensional accuracy.
In sum, by method of the present invention, can obtain dimensional tolerance precision high, the measured high precision titanium alloy pipe of surfaces externally and internally matter, this titanium alloy pipe, outer surface roughness Ra≤0.6 μ m, roughness Ra≤0.2 μ the m of inner surface, outside dimension tolerance≤0.04mm, internal diameter size tolerance≤0.03,3% 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, increased and singly sent two rotating rolling modes to.
2, controlled Q value and the gap value in the operation of rolling.
3, adopted the method for polishing and burnishing machine and hone to process tube surfaces.
4, the pipe material product roughness finally obtaining by this method should dimensional tolerance be all compared than patent.
Detailed description of the invention
Below in conjunction with example, the specific embodiment of the present invention is elaborated.It should be understood that example is for the present invention instead of limitation of the present invention are described.Scope of the present invention and core content are determined according to claims.
Embodiment 1:
Adopt TA18 φ 70 × 5mm extrusion tube blank, through LG60 double-roller cold pilger mill and LD60 tri-roller cold pilger mills, produce φ 35 × 3.5mm.Milling method turns for singly sending double back to (singly to be sent double back to and turns and refer to and once send within a rolling cycle of pipe mill, respectively carry out once approximately 57 ° of revolutions at forward and backward dead point place.), two rollings Q value processed is 0.41～0.47, and three-roll rolling Q value is 0.5～1.46, and gap value is 0.2～1mm.When rolling, the chlorinated paraffin wax of employing is inwall lubricant, and adopting the mixed liquor of machine oil and paraffin is outer wall lubricant (weight ratio 8～10:1).After rolling, tubing first carried out Ultrasonic Cleaning oil removing before heat treatment, then adopted pickling (HF:HNO
3: H
2o=5～12:45～60:100(volume ratio) in mixed liquor, soak 3～10min), washing and drying and processing.After rolling 1 passage, carry out the mode processing of inner surface bore hole.After every rolling 1 passage, middle product and finished product heat treatment adopt the heat treating regime of 650～750 DEG C/1～1.5h.Final finished tubing carries out outer surface rubbing down (the monolateral 0.5mm of rubbing down), the mode processing of inner surface hone (the monolateral 0.1mm of hone).Be detected as the roughness of product tubing: outer surface roughness Ra0.6 μ m, the roughness of inner surface is Ra0.2 μ m; Dimensional tolerance: outside dimension deviation ± 0.04mm, internal diameter size deviation ± 0.03, wall thickness dimension deviation ± 0.1mm.
Embodiment 2:
Adopt TA18 φ 90 × 10mm roll piercing pipe, through LG120, LG60, LG30 double-roller cold pilger mill and LD60, LD30 tri-roller cold pilger mills, produce φ 20 × 1mm.Milling method turns for singly sending double back to (singly to be sent double back to and turns and refer to and once send within a rolling cycle of pipe mill, respectively carry out once approximately 57 ° of revolutions at forward and backward dead point place.), two rollings Q value processed is 0.4～1.1, and three-roll rolling Q value is 0.4～5, and gap value is 0.3～1.5mm.When rolling, the chlorinated paraffin wax of employing is inwall lubricant, and adopting the mixed liquor of machine oil and paraffin is outer wall lubricant (weight ratio 8～10:1).After rolling, tubing first carried out Ultrasonic Cleaning oil removing before heat treatment, then adopted pickling (HF:HNO
3: H
2o=5～12:45～60:100(volume ratio) in mixed liquor, soak 3～10min), washing and drying and processing.After rolling the 1st, 3 passages, carry out the mode processing of inner surface bore hole.After every rolling 1 passage, middle product and finished product heat treatment adopt the heat treating regime of 700～750 DEG C/1～1.5h.Final finished tubing carries out outer surface rubbing down (the monolateral 0.4mm of rubbing down), the mode processing of inner surface hone (the monolateral 0.15mm of hone).Be detected as the roughness of product tubing: outer surface roughness Ra0.5 μ m, the roughness of inner surface is Ra0.1 μ m; Dimensional tolerance: outside dimension tolerance+0.03mm, internal diameter size tolerance+0.02, wall thickness dimension tolerance+0.03mm.
Embodiment 3:
Adopt TC4 φ 80 × 10mm extrusion tube blank, through LG90, LG60 double-roller cold pilger mill and LD60 tri-roller cold pilger mills, produce φ 40 × 1.2mm.Milling method turns for singly sending double back to (singly to be sent double back to and turns and refer to and once send within a rolling cycle of pipe mill, respectively carry out once approximately 57 ° of revolutions at forward and backward dead point place.), two rollings Q value processed is 0.5～0.9, and three-roll rolling Q value is 0.8～3, and gap value is 0.2～1.2mm.When rolling, the chlorinated paraffin wax of employing is inwall lubricant, and adopting the mixed liquor of machine oil and paraffin is outer wall lubricant (weight ratio 8～10:1).After rolling, tubing first carried out Ultrasonic Cleaning oil removing before heat treatment, then adopted pickling (HF:HNO
3: H
2o=5～12:45～60:100(volume ratio) in mixed liquor, soak 3～10min), washing and drying and processing.After rolling the 1st, 2 passages, carry out the mode processing of inner surface bore hole.After every rolling 1 passage, middle product and finished product heat treatment adopt the heat treating regime of 750～800 DEG C/1～1.5h.Final finished tubing carries out outer surface rubbing down (the monolateral 0.5mm of rubbing down), the mode processing of inner surface hone (the monolateral 0.2mm of hone).Be detected as the roughness of product tubing: outer surface roughness Ra0.5 μ m, the roughness of inner surface is Ra0.2 μ m; Dimensional tolerance: outside dimension tolerance+0.03mm, internal diameter size tolerance+0.02, wall thickness dimension tolerance+0.03mm.
Embodiment 4:
Adopt Gr.38 φ 84 × 10mm extrusion tube blank, through LG90, LG60, LG30 double-roller cold pilger mill and LD60, LD30 tri-roller cold pilger mills, produce φ 19 × 0.9mm.Milling method turns for singly sending double back to (singly to be sent double back to and turns and refer to and once send within a rolling cycle of pipe mill, respectively carry out once approximately 57 ° of revolutions at forward and backward dead point place.), two rollings Q value processed is 0.5～1.5, and three-roll rolling Q value is 0.6～4, and gap value is 0.2～1.6mm.When rolling, the chlorinated paraffin wax of employing is inwall lubricant, and adopting the mixed liquor of machine oil and paraffin is outer wall lubricant (weight ratio 8～10:1).After rolling, tubing first carried out Ultrasonic Cleaning oil removing before heat treatment, then adopted pickling (HF:HNO
3: H
2o=5～12:45～60:100(volume ratio) in mixed liquor, soak 3～10min), washing and drying and processing.After rolling the 1st, 2,4 passages, carry out the mode processing of inner surface bore hole.After every rolling 1 passage, middle product and finished product heat treatment adopt the heat treating regime of 750～800 DEG C/1～1.5h.Final finished tubing carries out outer surface rubbing down (the monolateral 0.4mm of rubbing down), the mode processing of inner surface hone (the monolateral 0.16mm of hone).Be detected as the roughness of product tubing: outer surface roughness Ra0.6 μ m, the roughness of inner surface is Ra0.2 μ m; Dimensional tolerance: outside dimension tolerance+0.03mm, internal diameter size tolerance+0.02, wall thickness dimension tolerance+0.02mm.
Claims (8)
1. the milling method of a high precision titanium alloy pipe, it is characterized in that: adopt the mode of two rollers and three roller combinations to be rolled the titanium alloy pipe preparing, milling method turns mode for singly sending double back to, controlling two rollings Q value processed is 0.4～2, multiroll rolling Q value is 0.4～9, gap value is 0.2～2mm, the finished product tubing that rolling is good obtains outer surface roughness Ra≤0.6 μ m after processing by the mode of outer surface rubbing down and inner surface hone, inside surface roughness Ra≤0.2 μ m, outside dimension tolerance≤0.04mm, internal diameter size tolerance≤0.03, 3% titanium alloy pipe of wall thickness dimension tolerance≤nominal wall thickness.
2. according to the milling method of high precision titanium alloy pipe claimed in claim 1, it is characterized in that described titanium alloy pipe is extrusion tube blank, or roll piercing pipe, or excellent base machine adds boring pipe.
3. according to the milling method of high precision titanium alloy pipe claimed in claim 1, while it is characterized in that described rolling, taking chlorinated paraffin wax as inwall lubricant, taking the mixed liquor of weight ratio 8～10:1 machine oil and paraffin as outer wall lubricant.
4. according to the milling method of high precision titanium alloy pipe claimed in claim 1, it is characterized in that in the described operation of rolling, after every rolling 1～3 passage of middle product tubing, carry out bore hole processing.
5. according to the milling method of high precision titanium alloy pipe claimed in claim 1, it is characterized in that in the described operation of rolling, every rolling 1～3 passage is heat-treated, and described heat treatment adopts the heat treating regime of 650～750 DEG C/1～1.5h.
6. according to the milling method of the high precision titanium alloy pipe described in claim 1 or 5, it is characterized in that in the described operation of rolling, first tubing adopted ultrasonic wave or degreaser to clean before heat-treating, then pickling, washing and drying and processing.
7. according to the milling method of high precision titanium alloy pipe claimed in claim 1, while it is characterized in that described outer surface rubbing down, control the monolateral 0.1～0.9mm of rubbing down.
8. according to the milling method of high precision titanium alloy pipe claimed in claim 1, while it is characterized in that described inner surface hone, control the monolateral 0.02～0.2mm of hone.
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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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| 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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| CN104148439A true CN104148439A (en) | 2014-11-19 |
| CN104148439B CN104148439B (en) | 2016-08-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105220097A (en) * | 2015-11-17 | 2016-01-06 | 西部钛业有限责任公司 | A kind of method controlling intermetallic compound precipitation direction 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 |
| CN113441553A (en) * | 2021-06-30 | 2021-09-28 | 北京科技大学 | Seamless pipe and cold rolling method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105220097A (en) * | 2015-11-17 | 2016-01-06 | 西部钛业有限责任公司 | A kind of method controlling intermetallic compound precipitation direction in titanium alloy tube |
| 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 |
| CN113441553A (en) * | 2021-06-30 | 2021-09-28 | 北京科技大学 | Seamless pipe and cold rolling method thereof |
| 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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| CN104148439B (en) | 2016-08-17 |
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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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