CN104174791B - The preparation method of profiled-cross-section silk material titanium alloy spring - Google Patents
The preparation method of profiled-cross-section silk material titanium alloy spring Download PDFInfo
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- CN104174791B CN104174791B CN201410352794.8A CN201410352794A CN104174791B CN 104174791 B CN104174791 B CN 104174791B CN 201410352794 A CN201410352794 A CN 201410352794A CN 104174791 B CN104174791 B CN 104174791B
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- 239000000463 material Substances 0.000 title claims abstract description 84
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000005516 engineering process Methods 0.000 claims abstract description 20
- 238000004804 winding Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000005242 forging Methods 0.000 claims abstract description 16
- 230000032683 aging Effects 0.000 claims abstract description 15
- 238000005098 hot rolling Methods 0.000 claims abstract description 12
- 238000005728 strengthening Methods 0.000 claims abstract description 9
- 239000010936 titanium Substances 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- 239000006104 solid solution Substances 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 6
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 abstract description 11
- 238000005260 corrosion Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 6
- 208000020442 loss of weight Diseases 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 238000009413 insulation Methods 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910021332 silicide Inorganic materials 0.000 description 2
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001040 Beta-titanium Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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Abstract
The present invention relates to a kind of preparation method of profiled-cross-section silk material titanium alloy spring, belong to spring technical field.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 cross section of titanium alloy spring silk material can be rectangle, square, regular hexagon or ellipse.The titanium alloy wire materials of spring winding, will through solution treatment before Wire-winding spring by forging and stamping, hot rolling technology preparation, and spring finished product will carry out ageing strengthening process.Adopt titanium alloys can play the effect of loss of weight for spring, under marine environment, have good resistance to corrosion, fatigue life long for titanium alloy simultaneously.Use profiled-cross-section silk material can increase sectional area under silk material specification similar conditions, improve spring rate, to meet the user demand of titanium alloy spring under high work load.
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, be thus widely applied in a lot of field.The characteristic of restoring force can be produced after utilizing spring element deflection, 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 development and the constantly progress of equipment manufacturing technology, the application of spring is also expanded day by day, and the effect as plant equipment spring element is more outstanding.Meanwhile, requirements at the higher level be it is also proposed to the Choice and design parameter of spring material, from the angle reducing weight of equipment, require that the spring element weight of assembling is light as far as possible.When spring uses under ocean and other corrosive environment, require that spring has 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, LCBFTB29 etc., has lighter in weight, preferably fatigue resistance, 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 in above-mentioned two patents, spring 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 larger than spring sizes bigger than normal fluctuation, brings great difficulty to the accurate control of spring sizes.In addition, for coarse pitch spring, circular cross-section silk material easily deflects distortion in coiling forming process, causes unbalance stress in Wire-winding process, and the spring different parts bounce-back of coiling is all uneven, is unfavorable for the accurate control of spring sizes equally.Adopt profiled-cross-section Wire-winding spring to solve the problem, profiled-cross-section silk material cross section can be rectangle, square, regular hexagon, ellipse.By along selected face spring winding, avoid and twist in Wire-winding process and cause 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 identical physical dimension, the stiffness coefficient of titanium alloy spring is less.Use profiled-cross-section Wire-winding spring, in silk material adjoining dimensions situation, the sectional area of profiled-cross-section silk material is greater than circular cross-section silk material, larger rigidity can be obtained after spring Coil-up, this just effectively compensate for titanium alloy shear modulus shortcoming on the low side, improve spring load allowed to bear, add the fatigue life of spring.
Summary of the invention
For the problem that titanium alloy elastic modulus is 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 improve silk material sectional area in silk material adjoining dimensions situation, improve spring rate, and then higher load can be born.
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 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 process 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 advantages such as titanium alloy tool specific strength is high, density is little, lightweight, corrosion resistance is strong, but shortcoming to be tensile strength more on the low side than steel, spring strength on the low side being difficult to of the coiling when silk material is measure-alike meets instructions for use.For addressing this problem, the present invention uses the profiled-cross-section titanium alloy wire materials prepared through forging and stamping, hot rolling technology, silk material spring winding after solution treatment, spring after coiling is through ageing strengthening process, intensity is increased dramatically, can instructions for use be met, after substituting 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.
Appropriate Fe is added in titanium alloy material preparation process, object is that Fe element can cause alloy substrate distortion of lattice, form stress field, thus the raising strength of materials, introduce the silicide that a small amount of Si can form Dispersed precipitate in the alloy, when alloy solid solution process, silicide can play the effect of inhibiting grain growth, contributes to controlling crystallite dimension, thus puies forward heavy alloyed intensity and plasticity.
Advantage of the present invention and beneficial effect as follows:
1, compared with traditional steel spring, titanium alloy wire materials is adopted to prepare the weight that spring significantly can reduce 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 traditional round silk cross section helical spring, 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 silk material Cross section Design, profiled-cross-section silk material cross section can be rectangle, square, regular hexagon, ellipse.Can be wound around along selected face when spring Coil-up, avoid the phenomenon causing discontinuity in Wire-winding process because twisting, improve the dimensional accuracy after spring forming.
3, profiled-cross-section silk material spring of the present invention silk material used, its cross section plane of symmetry spacing increases with area under circle silk diameter of section length same case, when the stress that silk material unit are is subject to is identical, can bear higher load.Owing to adopting profiled-cross-section silk material to add a material sectional area, improve the live load in spring use procedure, and then improve the stability of spring.For torsionspring, under identical windup-degree, spring can be made to produce higher moment of torsion.
4, profiled-cross-section silk material spring deformation recovery capability of the present invention is stronger, and not easily relax, performance is more stable.Due in spring Coil-up process along a certain fixing planar shaping of silk material, not easily make a thread material produce and reverse, so size bounce-back deviation after reducing spring Coil-up, more easily realize the accurate control of external diameter, pitch, height equidimension; Make finished product spring have more stable rigidity, higher design load can be realized.
5, profiled-cross-section silk material spring of the present invention not easily relaxes, improve the stability in use procedure, and then improving 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 silk material adjoining dimensions situation, the sectional area of profiled-cross-section silk material is greater than circular cross-section silk material, larger rigidity can be obtained after spring Coil-up, this just effectively compensate for titanium alloy shear modulus shortcoming on the low side, improves spring load allowed to bear, adds the fatigue life of spring.
Detailed description of the invention
The present invention adopts forging, hot rolling technology prepares 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 process to spring.
Embodiment 1
In the present embodiment, titan alloy casting ingot is forged into the forging rod of φ 70mm, forging rod is 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, is rolled into cross section 12.5mm × 12.5mm square silk material by titanium alloy forging rod 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 is more than 50%, and it is shaping that maximum section of passenger flow shrinkage factor is conducive to spring Coil-up.
(4) Ageing Treatment: 520 DEG C of insulations 10 hours, carry out ageing strengthening process to solid solution state silk material, the tensile property after timeliness was in table 2.
The room temperature tensile properties 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 is more than 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, forging rod is rolled into the hexagon silk material of 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, is rolled into by rolling equipment the hexagon silk material that the length of side is 7.5mm by titanium alloy forging rod;
(3) solution treatment: at 820 DEG C of insulation 15min, carry out solution treatment to silk material, 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 is more than 50%.It is shaping that maximum section of passenger flow shrinkage factor is conducive to spring Coil-up.
(4) Ageing Treatment: 530 DEG C of insulations 9 hours, carry out ageing strengthening process to solid solution state silk material, the tensile property after timeliness was in table 4.
The room temperature tensile properties 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 is close to 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 reducing 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 current market demand.
Claims (2)
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;
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 rod and be rolled into profiled-cross-section titanium alloy wire materials;
Profiled-cross-section titanium alloy wire materials spring winding after solution treatment, carries out ageing strengthening process 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.
2. according to the preparation method of profiled-cross-section silk material titanium alloy spring according to 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.
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| CN107234192B (en) * | 2016-08-02 | 2019-05-14 | 中国科学院金属研究所 | A kind of profiled-cross-section titanium alloy wire materials spring machining process |
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| 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 |
| 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 |
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| 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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