CN104174791A - Preparation method of titanium alloy spring made of wire with specially-shaped section - Google Patents
Preparation method of titanium alloy spring made of wire with specially-shaped section Download PDFInfo
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Abstract
The invention relates to a preparation method of a titanium alloy spring made of a wire with a specially-shaped section and belongs to the technical field of springs. The spring is formed by winding of the titanium alloy wire with the specially-shaped section; the titanium alloy wire comprises the components in percentage by mass as follows: 2-4 of Al, 6-10 of V, 4-8 of Cr, 2-6 of Mo, 2-6 of Zr, 0.1-0.3 of Fe, 0.03-0.15 of Si and the balance of Ti. The section of the titanium alloy spring wire can be rectangular, square, orthohexagonal or oval. The titanium alloy wire wound into the spring is prepared with forging, pressing and hot rolling technologies, the wire is subjected to solution treatment before being wound into the spring, and a finished product of the spring is subjected to aging and strengthening treatment. A titanium alloy which is used for preparing the spring can play a weight reduction role, and meanwhile, the titanium alloy has the good corrosion resistance and the long fatigue life in an ocean environment. With the adoption of the wire with the specially-shaped section, the section area can be increased under the condition that specifications of wires are similar, so that the rigidity of the spring is improved, and the usage requirement of the titanium alloy spring under the high workload can be met.
Description
Technical field
The invention belongs to spring technical field, be specially a kind of preparation method of profiled-cross-section silk material titanium alloy spring.
Background technology
Because spring has deformation recovery characteristics, thereby be widely applied in a lot of fields.Utilize the characteristic that can produce restoring force after spring element distortion, can be used for damping, clamping, energy storage and measurement, according to different purposes, mainly contain Compress Spring, draw refreshing spring and torsionspring.Material therefor is mainly metal material, and most widely used with steel spring in spring prepared by metal material, comprises carbon steel, steel alloy and stainless steel, is widely applied in fields such as space flight and aviation, machine-building, automobile, boats and ships.
At present, along with the development of equipment manufacturing technology and constantly progressive, the application of spring is expansion day by day also, more outstanding with the effect of spring element as plant equipment.Meanwhile, the Choice and design parameter of spring material is also proposed to requirements at the higher level, from reducing the angle of weight of equipment, required the spring element weight of assembling light as far as possible.In the time that spring uses under ocean and other corrosive environment, require spring to there is high corrosion resistance to obtain stable service life, and existing steel spring is difficult to meet above-mentioned requirements.
Chinese utility model patent (patent No. 200820047637.6) discloses a kind of titanium spring, by titanium alloy wire coiled, titanium alloy is beta-titanium alloy, Ti-3Al-8V-6Cr-4Mo-4Zr, LCB FTB29 etc., has light, the good fatigue resistance of weight, corrosion resistance and sensitivity compared with steel spring.Chinese utility model patent (patent No. 200920032686.7) discloses a kind of titanium alloy vehicle spring, and this spring is cylindrical, and the spring wire that spring is 0.5mm～0.7mm by diameter is made.What above-mentioned two patent medi-springs adopted is traditional circular cross-section silk material, because titanium alloy wire materials elasticity is better than steel wire, causes the spring of coiling, particularly curls up greatlyr than spring size fluctuation bigger than normal, brings great difficulty to the accurate control of spring size.In addition, for coarse pitch spring, the distortion that easily deflects in coiling forming process of circular cross-section silk material, causes unbalance stress in Wire-winding process, and the spring different parts bounce-back of coiling is all uneven, is unfavorable for equally the accurate control of spring size.Adopt profiled-cross-section Wire-winding spring to address the above problem, profiled-cross-section silk material cross section can be rectangle, square, regular hexagon, ellipse.By the face spring winding along selected, avoid twisting in Wire-winding process and caused the phenomenon of discontinuity, improve the dimensional accuracy after spring forming.
Titanium alloy has excellent resistance to industrial corrosion and resistance to marine atmosphere, seawater corrosion performance, and its density is 4.5～4.8g/cm
3.Therefore,, compared with steel spring, titanium alloy spring has obvious loss of weight effect and resistance to corrosion.But the shear modulus of titanium alloy is the half of steel, under the condition of same structure size, the stiffness coefficient of titanium alloy spring is less.Use profiled-cross-section Wire-winding spring, in the close situation of silk material size, the sectional area of profiled-cross-section silk material is greater than circular cross-section silk material, after spring Coil-up, can obtain larger rigidity, this has just effectively made up titanium alloy shear modulus shortcoming on the low side, improve spring load allowed to bear, increased the fatigue life of spring.
Summary of the invention
For titanium alloy elastic modulus problem on the low side, the object of the present invention is to provide a kind of preparation method of profiled-cross-section silk material titanium alloy spring.Compared with circular cross-section silk material, adopt profiled-cross-section silk material can in the close situation of silk material size, improve silk material sectional area, improve spring rate, and then can bear higher load.
Technical scheme of the present invention is:
A preparation method for profiled-cross-section silk material titanium alloy spring, spring is formed by the coiling of profiled-cross-section titanium alloy wire materials; By mass percentage, the component of titanium alloy wire is Al:2～4, V:6～10, Cr:4～8, Mo:2～6, Zr:2～6, Fe:0.1～0.3, Si:0.03～0.15; Ti is surplus.
The preparation method of described profiled-cross-section silk material titanium alloy spring, the cross sectional shape of profiled-cross-section titanium alloy wire materials is rectangle, square, regular hexagon or ellipse.
The preparation method of described profiled-cross-section silk material titanium alloy spring, profiled-cross-section titanium alloy wire materials is by forging and stamping, hot rolling technology preparation, and concrete technology parameter is as follows:
(1) at 1130 DEG C～1200 DEG C, be incubated 3～4 hours, adopt Forging Technology, titan alloy casting ingot is forged into bar;
(2) at 870 DEG C～920 DEG C, be incubated 1～2 hour, adopt hot rolling technology, titanium alloy is forged to rod and be rolled into profiled-cross-section titanium alloy wire materials.
The preparation method of described profiled-cross-section silk material titanium alloy spring, profiled-cross-section titanium alloy wire materials spring winding after solution treatment, carries out ageing strengthening processing to the spring after coiling, and concrete technology parameter is as follows:
(1) solid solution temperature is between 820 DEG C～840 DEG C, temperature retention time 10min～18min;
(2) ageing strengthening treatment temperature between 520～530 DEG C, temperature retention time 8h～10h.
Design philosophy of the present invention is:
Compared with Steel material, the advantage such as titanium alloy tool specific strength is high, density is little, lightweight, corrosion resistance is strong, but that shortcoming is tensile strength is more on the low side than steel, in the situation that silk material is measure-alike, the spring strength of coiling is on the low side is difficult to meet instructions for use.For addressing this problem, the present invention uses the profiled-cross-section titanium alloy wire materials of preparing through forging and stamping, hot rolling technology, silk material spring winding after solution treatment, spring after coiling is through ageing strengthening processing, intensity is increased dramatically, instructions for use can be met, after instead of steel spring, loss of weight effect can also be played.Meanwhile, due to advantages such as titanium alloy resistance to corrosion are strong, fatigue resistance is good, the spring of preparation has higher service life.
In titanium alloy material preparation process, add appropriate Fe, object is that Fe element can cause alloy substrate distortion of lattice, form stress field, thereby the raising strength of materials, introduce a small amount of Si and can in alloy, form the silicide that disperse distributes, in the time that alloy solid solution is processed, silicide can play the effect of inhibiting grain growth, contributes to control crystallite dimension, thereby puies forward heavy alloyed intensity and plasticity.
Advantage of the present invention and beneficial effect are as follows:
1,, compared with traditional steel spring, adopt titanium alloy wire materials to prepare spring can significantly to reduce the weight of spring.Under application circumstances (as: ocean and other corrosive environment), there is good resistance to corrosion, and then improve spring service life.
2, compared with the helical spring of traditional circle silk cross section, profiled-cross-section silk material spring has its outstanding feature.In spring Coil-up process, traditional circular cross-section silk material easily twists and causes discontinuity in Wire-winding process, and after spring forming, dimensional discrepancy is large, and spring precision is wayward, and spring product qualified rate is reduced.Be special-shaped by spring by silk material Cross section Design, profiled-cross-section silk material cross section can be rectangle, square, regular hexagon, ellipse.In the time of spring Coil-up, can be wound around along selected face, avoid causing because twisting in Wire-winding process the phenomenon of discontinuity, improve the dimensional accuracy after spring forming.
3, profiled-cross-section silk material spring of the present invention silk used material, area change under its cross section plane of symmetry spacing and circle silk diameter of section length same case, when the stress that is subject to is identical, can bear higher load in silk material unit are.Owing to adopting profiled-cross-section silk material to increase silk material sectional area, improve the live load in spring use procedure, and then improved the stability of spring.For torsionspring, under identical windup-degree, can make spring produce higher moment of torsion.
4, profiled-cross-section silk material spring deformation recovery capability of the present invention is stronger, is difficult for relaxing, and performance is more stable.Due in spring Coil-up process along a certain fixing planar shaping of silk material, be difficult for making a thread material to produce and reverse, so reduced size bounce-back deviation after spring Coil-up, more easily realize the accurate control of external diameter, pitch, height equidimension; Make finished product spring there is more stable rigidity, can realize higher design load.
5, profiled-cross-section silk material spring of the present invention is difficult for occurring lax, improve the stability in use procedure, and then having promoted fatigue life, profiled-cross-section silk material titanium alloy spring possesses above-mentioned advantage can substitute circular cross-section silk material titanium alloy spring and steel spring.
In a word, use profiled-cross-section Wire-winding spring, in the close situation of silk material size, the sectional area of profiled-cross-section silk material is greater than circular cross-section silk material, after spring Coil-up, can obtain larger rigidity, this has just effectively made up titanium alloy shear modulus shortcoming on the low side, has improved spring load allowed to bear, has increased the fatigue life of spring.
Detailed description of the invention
The present invention adopts forging, hot rolling technology to prepare profiled-cross-section titanium alloy wire materials, and by numerical control spring winding machine spring winding, profiled-cross-section titanium alloy wire materials is rectangle, square, regular hexagon or ellipse.By mass percentage, its component of titanium alloy wire used is, Al:2～4, V:6～10, Cr:4～8, Mo:2～6, Zr:2～6, Fe:0.1～0.3, Si:0.03～0.15; Ti is surplus.Described profiled-cross-section titanium alloy wire materials is prepared from by forging, hot rolling technology, and titanium alloy wire materials, after solution treatment, by numerical control spring winding machine spring winding, then carries out ageing strengthening processing to spring.
Embodiment 1
In the present embodiment, titan alloy casting ingot is forged into the forging rod of φ 70mm, forges rod and be rolled into cross section 12.5mm × 12.5mm square silk material through irregular section bar rolling equipment.
(1) forge: at 1170 DEG C, be incubated 3 hours, adopt Forging Technology, titan alloy casting ingot is forged into φ 70mm bar;
(2) hot rolling: 900 DEG C of insulations 1 hour, adopt hot rolling technology, titanium alloy is forged to rod and be rolled into cross section 12.5mm × 12.5mm square silk material by rolling equipment.
(3) solution treatment: carry out solution treatment at 830 DEG C of insulation 10min to rolling rod, measure the tensile property of solid solution state silk material, concrete outcome is in table 1.
Tensile property after a table 1 material solution treatment
As seen from Table 1, silk material plasticity after solution treatment is good, and particularly the contraction percentage of area exceedes 50%, and maximum section of passenger flow shrinkage factor is conducive to spring Coil-up moulding.
(4) Ageing Treatment: 520 DEG C of insulations 10 hours, solid solution state silk material is carried out to ageing strengthening processing, the tensile property after timeliness is in table 2.
The room temperature tensile performance of titanium alloy wire materials after table 2 Ageing Treatment
As can be seen from Table 2, silk material intensity after Ageing Treatment is greatly improved, and tensile strength exceedes 1280MPa, and mechanical property can meet the performance requirement as spring.
Embodiment 2
In the present embodiment, titan alloy casting ingot is forged into the forging rod of φ 60mm, forges the excellent hexagon silk material that is rolled into length of side 7.5mm through irregular section bar rolling equipment.
(1) forge: at 1140 DEG C, be incubated 4 hours, adopt Forging Technology, titan alloy casting ingot is forged into φ 60mm bar;
(2) hot rolling: 880 DEG C of insulations 2 hours, adopt hot rolling technology, titanium alloy is forged to rod and be rolled into by rolling equipment the hexagon silk material that the length of side is 7.5mm;
(3) solution treatment: at 820 DEG C of insulation 15min, silk material is carried out to solution treatment, measure the tensile property of solid solution state silk material, concrete outcome is in table 3.
Tensile property after a table 3 material solution treatment
As seen from Table 3, silk material plasticity after solution treatment is good, and particularly the contraction percentage of area exceedes 50%.Maximum section of passenger flow shrinkage factor is conducive to spring Coil-up moulding.
(4) Ageing Treatment: 530 DEG C of insulations 9 hours, solid solution state silk material is carried out to ageing strengthening processing, the tensile property after timeliness is in table 4.
The room temperature tensile performance of titanium alloy wire materials after table 4 Ageing Treatment
As can be seen from Table 4, silk material intensity after Ageing Treatment is greatly improved, and tensile strength approaches 1300MPa, and mechanical property can meet the performance requirement as spring.
Embodiment result shows, compared with steel spring, the present invention uses specific profiled-cross-section Wire-winding titanium alloy spring to have the advantages such as density is little, specific strength is high, corrosion resistance is strong, can play the effect that reduces weight by specific titanium alloys for spring.Meanwhile, titanium alloy has good resistance to corrosion under marine environment, stable performance, and fatigue life is long, can Vehicles Collected from Market demand.
Claims (4)
1. a preparation method for profiled-cross-section silk material titanium alloy spring, is characterized in that, spring is formed by the coiling of profiled-cross-section titanium alloy wire materials; By mass percentage, the component of titanium alloy wire is Al:2～4, V:6～10, Cr:4～8, Mo:2～6, Zr:2～6, Fe:0.1～0.3, Si:0.03～0.15; Ti is surplus.
2. according to the preparation method of profiled-cross-section silk material titanium alloy spring claimed in claim 1, it is characterized in that, the cross sectional shape of profiled-cross-section titanium alloy wire materials is rectangle, square, regular hexagon or ellipse.
3. according to the preparation method of the profiled-cross-section silk material titanium alloy spring described in claim 1 or 2, it is characterized in that, profiled-cross-section titanium alloy wire materials is by forging and stamping, hot rolling technology preparation, and concrete technology parameter is as follows:
(1) at 1130 DEG C～1200 DEG C, be incubated 3～4 hours, adopt Forging Technology, titan alloy casting ingot is forged into bar;
(2) at 870 DEG C～920 DEG C, be incubated 1～2 hour, adopt hot rolling technology, titanium alloy is forged to rod and be rolled into profiled-cross-section titanium alloy wire materials.
4. according to the preparation method of profiled-cross-section silk material titanium alloy spring claimed in claim 3, it is characterized in that, profiled-cross-section titanium alloy wire materials spring winding after solution treatment, carries out ageing strengthening processing to the spring after coiling, and concrete technology parameter is as follows:
(1) solid solution temperature is between 820 DEG C～840 DEG C, temperature retention time 10min～18min;
(2) ageing strengthening treatment temperature between 520～530 DEG C, temperature retention time 8h～10h.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033123A (en) * | 2015-09-14 | 2015-11-11 | 沈阳泰恒通用技术有限公司 | Processing method for hot rolling titanium spring with spring wire diameter of 12 to 45mm |
| CN105779748A (en) * | 2014-12-24 | 2016-07-20 | 北京有色金属研究总院 | Aging strengthened alloy ring creep aging shape correcting method |
| CN106513457A (en) * | 2016-11-09 | 2017-03-22 | 宝钛集团有限公司 | Preparation method for near-beta titanium alloy disc spring |
| CN107234192A (en) * | 2016-08-02 | 2017-10-10 | 中国科学院金属研究所 | A kind of profiled-cross-section titanium alloy wire materials spring machining process |
| CN108570577A (en) * | 2018-05-08 | 2018-09-25 | 中国航发北京航空材料研究院 | A kind of high strength titanium alloy silk material preparation method |
| TWI645917B (en) * | 2018-01-19 | 2019-01-01 | 中國鋼鐵股份有限公司 | Method of producing titanium alloy wire rod |
| RU2681102C2 (en) * | 2017-05-12 | 2019-03-04 | Хермит Эдванст Технолоджиз ГмбХ | Method for producing a billet from a titanium-based alloy for elastic elements with energy-intensive structure |
| RU2681089C2 (en) * | 2017-05-12 | 2019-03-04 | Хермит Эдванст Технолоджиз ГмбХ | Titanium-based alloy billet for elastic elements with energy-intensive structure |
| CN111250631A (en) * | 2020-03-16 | 2020-06-09 | 沈阳飞机工业（集团）有限公司 | TB9 titanium alloy tension spring processing method |
| CN111306229A (en) * | 2020-03-03 | 2020-06-19 | 沈阳和世泰通用钛业有限公司 | Small-wire-diameter titanium alloy spring and preparation method and application thereof |
| CN114959360A (en) * | 2022-06-16 | 2022-08-30 | 昆明理工大学 | Corrosion-resistant titanium alloy, preparation method thereof and corrosion-resistant flexible bearing |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779748A (en) * | 2014-12-24 | 2016-07-20 | 北京有色金属研究总院 | Aging strengthened alloy ring creep aging shape correcting method |
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| RU2681102C2 (en) * | 2017-05-12 | 2019-03-04 | Хермит Эдванст Технолоджиз ГмбХ | Method for producing a billet from a titanium-based alloy for elastic elements with energy-intensive structure |
| RU2681089C2 (en) * | 2017-05-12 | 2019-03-04 | Хермит Эдванст Технолоджиз ГмбХ | Titanium-based alloy billet for elastic elements with energy-intensive structure |
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| CN108570577B (en) * | 2018-05-08 | 2019-12-27 | 中国航发北京航空材料研究院 | Preparation method of high-strength titanium alloy wire |
| CN111306229A (en) * | 2020-03-03 | 2020-06-19 | 沈阳和世泰通用钛业有限公司 | Small-wire-diameter titanium alloy spring and preparation method and application thereof |
| CN111250631A (en) * | 2020-03-16 | 2020-06-09 | 沈阳飞机工业（集团）有限公司 | TB9 titanium alloy tension spring processing method |
| CN114959360A (en) * | 2022-06-16 | 2022-08-30 | 昆明理工大学 | Corrosion-resistant titanium alloy, preparation method thereof and corrosion-resistant flexible bearing |
| CN114959360B (en) * | 2022-06-16 | 2023-01-24 | 昆明理工大学 | Corrosion-resistant titanium alloy, preparation method thereof and corrosion-resistant flexible bearing |
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