CN103157956B - Processing method of nickel-titanium memorial alloy tube with thin diameter and thick wall - Google Patents
Processing method of nickel-titanium memorial alloy tube with thin diameter and thick wall Download PDFInfo
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- CN103157956B CN103157956B CN201110425619.3A CN201110425619A CN103157956B CN 103157956 B CN103157956 B CN 103157956B CN 201110425619 A CN201110425619 A CN 201110425619A CN 103157956 B CN103157956 B CN 103157956B
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Abstract
The invention discloses a processing method of a nickel-titanium memorial alloy tube with a thin diameter and a thick wall and belongs to the field of material processing. The processing method of the nickel-titanium memorial alloy tube with thin diameter and thick wall includes: manufacturing a nickel-titanium memorial alloy tube blank according to actual use requirements and adopting a method of three-roller cold rolling to roll the inner diameter into 3 to 8 millimeters according to a gate working rate of 10% to 25%; and then enabling the inner diameter to nearly reach a final size by conducting rotary swaging, wherein rotary swaging is conducted at a working rate of not more than 30% of gate deformation; processing the outer diameter into a needed size on the premise of guaranteeing that the inner diameter reaches an appropriate size by drawing, wherein the gate deformation is 5% to 15%; and finally obtaining a finished product of the tube with the thick wall and the thin diameter by correcting and cylindrical grinding. According to the processing method of the nickel-titanium memorial alloy tube with thin diameter and thick wall, the nickel-titanium memorial alloy tube with the thin diameter of lower than 3 millimeters and the thick wall of 1millimeter to 3 millimeters can be manufactured. The nickel-titanium memorial alloy tube with the thin diameter and the thick wall has the advantages of possessing an appropriate organization and an axial structure and being particularly suitable for preparing the nickel-titanium memorial alloy thin diameter tube connector with high recoverability.
Description
Technical field
The invention belongs to material processing field, particularly relate to the thick-walled pipe processing preparation of Ultimum Ti thin footpath.
Background technology
Along with the extensive use of Ultimum Ti in engineer applied, the preparation processing of Ultimum Ti material also becomes one of bottleneck of its engineer applied of restriction gradually.Wherein, comparatively typically Ultimum Ti pipeline connects application pipe joint, and engineer applied needs, and pipe joint needs to possess certain wall thickness, also need to consider last machining allowance, so pipe joint Ultimum Ti tubing has the feature of thickness of pipe wall usually simultaneously.At present, the thin diameter tube road connection Ultimum Ti pipe joint that external diameter is less than 4mm is also used widely in engineer applied, but because internal diameter of pipe joint is little, wall thickness is thicker, the heavy wall meeting dimensional requirement thin footpath Ultimum Ti pipe cannot be prepared with common process, mostly adopt the method prepared from machined bar at present.But bar processing method not only wastes material, and the material structure such as microstructure and texture state is also undesirable, and preparing Ultimum Ti thin footpath thick-wall tube is current thin footpath Ultimum Ti pipe joint engineer applied problem demanding prompt solution.
Ultimum Ti is that the strength of materials is high, and preliminary work hardening rate is large, and plastic working interval is narrow, difficult processing metal; Thin footpath thick-walled pipe requires all strict many relative to large footpath light-wall pipe to equipment and process simultaneously, so only have the rational technological process of formulation and technique just can prepare Ultimum Ti thin footpath thick-wall tube.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of Ultimum Ti thin footpath thick-walled pipe processing method, the method comprises the steps:
(1) Ultimum Ti pipe is obtained by machined or thermal processing method;
(2) by pass reduction 10%-25%, adopt three roller cold rolling technologies that internal diameter is rolling to 3-8mm;
(3) the cold rolling tubing of Ultimum Ti first step (2) obtained is at 700 ~ 900 degree of insulation 20 ~ 40min, and then to process Ultimum Ti tubing by swaging, pass deformation is no more than 30%;
(4) by drawing, the Ultimum Ti tubing that step (3) obtains is processed, pass deformation 5%-15%;
(5) finally by aligning, peripheral milling, obtains below internal diameter 3mm, the finished product thin footpath thick-wall tube of wall thickness 1mm-3mm.
The size of Ultimum Ti pipe can use according to reality and need cold deformation to return to obtain in step (1).
Often after 2 passes, generally will carry out intermediate annealing in described step (2), the condition of intermediate annealing is temperature is 500 ~ 700 degree, and the time is 0.5 ~ 1.5 hour, and optimum condition is temperature is 600 degree, and the time is one hour.
Described in step (2), the preferable range of internal diameter rolling is 4-6mm.
Preferably cold rolling for Ultimum Ti tubing is incubated 30min at 800 degree before swaging in step (3).
Pipe internal diameter is made to reach near required finished product internal diameter size by processing of swaging in step (3), generally make internal diameter size 0 ~ 0.5mm larger than required finished product internal diameter size, the number of internal diameter allowance can be determined by the processing characteristics of processed Nitinol; Under making internal diameter reach the prerequisite of required finished product internal diameter size by step (4) control drawing deformation amount again, external diameter is machined to slightly larger than required finished product outside dimension (generally 0.03 ~ 0.2mm larger than required finished product outside dimension).
Beneficial effect of the present invention is: the operations such as Ultimum Ti pipe of the present invention adopts three-roll rolling, swages, drawing, aligning, can prepare below internal diameter 3mm, the thin footpath thick-wall tube Ultimum Ti tubing of wall thickness 1mm-3mm.And this tubing has fine uniform tissue and rational texture configuration, possess good carrying out memory recoverability, be applicable to the material preparation of thin diameter tube road connection Ultimum Ti thin diameter tube joint.
Detailed description of the invention
The invention provides the method that Ultimum Ti thin footpath thick-wall tube prepares processing, be described in further detail below in conjunction with specific embodiment.
Embodiment 1:
1, first external diameter 16mm, internal diameter 8mm Ultimum Ti pipe is obtained by machining mode;
2, by three cold mill multi-pass rollings, Ultimum Ti pipe is machined to external diameter 10mm, internal diameter 5.5mm, rolling technological parameter is: every time working modulus 10 ~ 15%, the 600 degree of intermediate annealings in a hour of every 2 passage;
3, cold rolling for Ultimum Ti tubing is incubated half an hour at 800 degree, then carry out hot-swage with passage processing capacity 10 ~ 15%, swaging to internal diameter is 2mm, and now external diameter is 7.5mm;
4, will swage Ultimum Ti tubing obtained by the cold drawing of 7.3mm, 7.0mm, 6.8mm, 6.55mm four-pass, pass deformation is respectively 6%, and 10%, 7%, 5%; Obtain internal diameter 1.9mm, the Ultimum Ti tubing of external diameter 6.55mm;
5, cold drawn Ultimum Ti tubing is aligned by thermal straightening machine, peripheral milling polished surface, obtain external diameter 6.5mm, the Ultimum Ti heavy wall thin diameter tube material of internal diameter 1.9mm.
Embodiment 2:
1, first external diameter 30mm, internal diameter 15mm Ultimum Ti pipe is obtained by fashion of extrusion;
2, by three cold mill multi-pass rollings, Ultimum Ti pipe is machined to external diameter 14mm, internal diameter 7mm, rolling technological parameter is: every time working modulus 20 ~ 25%, the 600 degree of intermediate annealings in a hour of every 2 passage;
3, cold rolling for Ultimum Ti tubing is incubated half an hour at 800 degree, then carry out hot-swage with pass deformation 25 ~ 30%, swaging to internal diameter is 3.0mm, and now external diameter is 10mm;
4, will swage Ultimum Ti tubing obtained by 9.65mm, 9.3mm, 9.1mm tri-passage cold drawing, pass deformation is respectively: 8%, and 8%, 5%; Obtain internal diameter 3mm, the Ultimum Ti tubing of external diameter 9.1mm;
5, cold drawn Ultimum Ti tubing is aligned by thermal straightening machine, peripheral milling polished surface, obtain external diameter 9.0mm, the Ultimum Ti heavy wall thin diameter tube material of internal diameter 3mm.
Embodiment 3:
1, first external diameter 16mm, internal diameter 8mm Ultimum Ti pipe is obtained by machining mode;
2, by three cold mill multi-pass rollings, Ultimum Ti pipe is machined to external diameter 9mm, internal diameter 4.5mm, rolling technological parameter is: every time working modulus 10 ~ 13%, the 600 degree of intermediate annealings in a hour of every 2 passage;
3, cold rolling for Ultimum Ti tubing is incubated half an hour at 800 degree, then carry out hot-swage with pass deformation 8%, swaging to internal diameter is 3.1mm, and now external diameter is 6mm;
4, will swage Ultimum Ti tubing obtained by the cold drawing of 5.7mm, 5.4mm, 5.2mm, 5.05mm four-pass, pass deformation is respectively: 13%, and 14%, 11%, 11%; Obtain internal diameter 3mm, the Ultimum Ti tubing of external diameter 5.05mm;
5, cold drawn Ultimum Ti tubing is aligned by thermal straightening machine, peripheral milling polished surface, obtain external diameter 5.0mm, the Ultimum Ti heavy wall thin diameter tube material of internal diameter 3mm.
Above embodiment is for understanding the present invention's; not the technical staff of limitation of the present invention, related fields, on the basis of technical scheme described in claim; can also make multiple change or distortion, all equivalent changes or distortion all should within protection scope of the present invention.
Claims (7)
1. a Ultimum Ti thin footpath thick-walled pipe processing method, first (1), obtain Ultimum Ti pipe by machined or thermal processing method; It is characterized in that: this processing method is further comprising the steps of:
(2), three roller cold rolling technologies are adopted by billet production to internal diameter 3-8mm, pass reduction 10%-25%;
(3) the Ultimum Ti tubing, first step (2) obtained is at 700 ~ 900 degree of insulation 20 ~ 40min, and then to process Ultimum Ti tubing by swaging, pass deformation is no more than 30%;
(4), by drawing the Ultimum Ti tubing that step (3) obtains is processed, pass deformation 5%-15%;
(5), after aligning, peripheral milling, the Ultimum Ti thin footpath thick-wall tube of obtained below internal diameter 3mm, wall thickness 1-3mm.
2. processing method according to claim 1, is characterized in that: often will carry out intermediate annealing after 2 passes in step (2), and annealing temperature is 500 ~ 700 degree, 0.5 ~ 1.5 hour time.
3. processing method according to claim 2, is characterized in that: often will carry out intermediate annealing after 2 passes in step (2), and annealing temperature is 600 degree, 1 hour time.
4. processing method according to claim 1, is characterized in that: first cold rolling for Ultimum Ti tubing is incubated 30min at 800 degree before swaging in step (3).
5. processing method according to claim 1, is characterized in that: adopt three roller cold rolling technologies in step (2) by billet production to internal diameter 4-6mm.
6. processing method according to claim 1, is characterized in that: in step (3), internal diameter size is machined to 0 ~ 0.5mm larger than required finished product internal diameter size.
7. processing method according to claim 1, is characterized in that: in step (4), outside dimension is machined to 0.03 ~ 0.2mm larger than required finished product outside dimension.
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| CN201110425619.3A CN103157956B (en) | 2011-12-16 | 2011-12-16 | Processing method of nickel-titanium memorial alloy tube with thin diameter and thick wall |
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| CN201110425619.3A CN103157956B (en) | 2011-12-16 | 2011-12-16 | Processing method of nickel-titanium memorial alloy tube with thin diameter and thick wall |
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| CN103157956A CN103157956A (en) | 2013-06-19 |
| CN103157956B true CN103157956B (en) | 2015-04-15 |
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| CN104475479B (en) * | 2014-09-25 | 2016-08-24 | 北京科技大学 | A kind of technique utilizing swaging techniques to prepare small-diameter thick-walled metal tube |
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| CN104624713B (en) * | 2014-12-17 | 2016-08-10 | 北京有色金属研究总院 | A kind of preparation method of the seamless tubule of precise determination of titanium alloy thin-wall |
| CN105414426B (en) * | 2015-12-11 | 2017-07-04 | 西北有色金属研究院 | A kind of hot-swage method of kirsite small specification tube or bar |
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| CN108715986B (en) * | 2018-06-26 | 2019-12-24 | 哈尔滨工程大学 | Method for improving room temperature plasticity of austenitic nickel titanium-based shape memory alloy by adjusting texture |
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| CN111438318B (en) * | 2020-04-10 | 2021-02-19 | 西安交通大学 | Thin-wall high-strength titanium alloy pipe and preparation method thereof |
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| CN113025929A (en) * | 2021-03-09 | 2021-06-25 | 江苏盛玛特新材料科技有限公司 | Manufacturing method of W fiber reinforced TiNi alloy tube with high X-ray visibility |
| CN113000624B (en) * | 2021-03-09 | 2023-01-17 | 江苏盛玛特新材料科技有限公司 | Nickel-titanium super-elastic pipe and industrial preparation method and application thereof |
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| CN1085839A (en) * | 1992-10-19 | 1994-04-27 | 中国科学院金属研究所 | Make the process of NiTiNb memorial alloy precision tube |
| CN1614055A (en) * | 2004-12-08 | 2005-05-11 | 北京航空航天大学 | Low-phase point-variable high-strength TiNiFeMo marmem and use as pipe joint thereof |
| CN1295038C (en) * | 2005-05-10 | 2007-01-17 | 江苏法尔胜技术开发中心 | Lubrication impact extrusion forming method of nickel titanium-base shape memory alloy tubing glass |
| CN1295037C (en) * | 2005-05-10 | 2007-01-17 | 江苏法尔胜技术开发中心 | Sleeve pulling shaping method of nickel titanium base marmem pipe material |
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Effective date of registration: 20190226 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Research Institute of engineering and Technology Co., Ltd. Address before: No. 2, Xinjie street, Xicheng District, Beijing, Beijing Patentee before: General Research Institute for Nonferrous Metals |