CN103436733A - High-fatigue-property titanium alloy for mountain bike frames - Google Patents
High-fatigue-property titanium alloy for mountain bike frames Download PDFInfo
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Abstract
The invention provides a high-fatigue-property titanium alloy for mountain bike frames, which is composed of the following components in percentage by mass: 2.5-3.5% of Al, 1.0-2.0% of V, 0.3-2.0% of Fe, 0.6-4.0% of Cr and the balance of Ti and inevitable impurities. After the titanium alloy is subjected to heat treatment, under the conditions that the horizontal fatigue loading frequency f is less than or equal to 15Hz, the tensile force F1 is equal to 1200N and the pressure F2 is equal to 600N, the fatigue life N is greater than or equal to 50000 times, thereby satisfying the related technical requirements in European Standard EN14766-2005. Compared with the traditional titanium alloy for mountain bike frames, the titanium alloy provided by the invention has the advantages of high strength, favorable plasticity, high fatigue property, low production cost and the like, can obviously prolong the service life of the mountain bike, and has wide application prospects.
Description
Technical field
The invention belongs to the titanium alloy material technical field, be specifically related to high tired titanium alloy for a kind of mountain bike frame.
Background technology
Since mountain bike in 1977 invention, lightweight, high-strength, long lifetime are the targets that numerous mountain bike manufacturer chases always.Density is little, intensity is high because having for titanium alloy, high-low temperature resistant, the many merits, particularly specific tenacity such as corrosion-resistant be higher than magnesium, aluminium alloy, is therefore to be the researchdevelopment direction in bike field always, is desirable mountain bike frame material.
At present external titanium mountain bike technology of preparing processed is relatively ripe, the Ti-3Al-2.5V titanium alloy pipes that adopt prepare mountain bike frame more, and its over-all properties is good, but production cost is higher, the vehicle frame wall thickness of preparation is thicker, exists the defects such as product weight is large, cost is high, the life-span is low.
The domestic research about titanium mountain bike processed is carried out for many years, although also select the standby vehicle frame body of Ti-3Al-2.5V titanium alloys, but can't break through the examination bottleneck of the low Zhou Shuiping fatigue property of lightweight titanium vehicle frame processed, vehicle frame is at horizontal fatigue loading frequency f≤15Hz, tensile force f always
1=1200N, pressure F
2under the condition of=600N, its fatigue lifetime N>=50000 times check requirements.
Therefore, need badly and obtain a kind of mountain bike frame high fatigue property titanium alloy, the mountain bike frame that utilizes it to prepare is at horizontal fatigue loading frequency f≤15Hz, tensile force f
1=1200N, pressure F
2n fatigue lifetime under=600N condition>=50000 times.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, and a kind of mountain bike frame high fatigue property titanium alloy is provided.This titanium alloy after heat treatment, at horizontal fatigue loading frequency f≤15Hz, tensile force f
1=1200N and pressure F
2n fatigue lifetime under=600N condition>=50000 times, meet the correlation technique requirement of European standard EN14766-2005.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of mountain bike frame high fatigue property titanium alloy, it is characterized in that, one-tenth by following mass percent is grouped into: Al2.5%～3.5%, V1.0%～2.0%, Fe0.3%～2.0%, Cr0.6%～4.0%, surplus is Ti and inevitable impurity; Described mountain bike frame refers to this titanium alloy after heat treatment with the high fatigue property titanium alloy, at horizontal fatigue loading frequency f≤15Hz, tensile force f
1=1200N and pressure F
2n fatigue lifetime under=600N condition>=50000 times.
Above-mentioned a kind of mountain bike frame high fatigue property titanium alloy, is characterized in that, by the one-tenth of following mass percent, is grouped into: Al3.0%, and V1.7%, Fe0.5%, Cr1.0%, surplus is Ti and inevitable impurity.
Above-mentioned a kind of mountain bike frame high fatigue property titanium alloy, is characterized in that, by the one-tenth of following mass percent, is grouped into: Al3.0%, and V2.0%, Fe1.0%, Cr2.0%, surplus is Ti and inevitable impurity.
Above-mentioned a kind of mountain bike frame high fatigue property titanium alloy, is characterized in that, by the one-tenth of following mass percent, is grouped into: Al3.2%, and V1.5%, Fe0.75%, Cr1.5%, surplus is Ti and inevitable impurity.
Above-mentioned a kind of mountain bike frame high fatigue property titanium alloy, is characterized in that, by the one-tenth of following mass percent, is grouped into: Al2.8%, and V1.3%, Fe1.5%, Cr3.0%, surplus is Ti and inevitable impurity.
Above-mentioned a kind of mountain bike frame high fatigue property titanium alloy, is characterized in that, by the one-tenth of following mass percent, is grouped into: Al2.5%, and V1.0%, Fe2.0%, Cr4.0%, surplus is Ti and inevitable impurity.
Above-mentioned a kind of mountain bike frame high fatigue property titanium alloy, is characterized in that, by the one-tenth of following mass percent, is grouped into: Al3.5%, and V2.0%, Fe0.3%, Cr0.6%, surplus is Ti and inevitable impurity.
Above-mentioned a kind of mountain bike frame high fatigue property titanium alloy is characterized in that in this titanium alloy, the mass ratio of Fe and Cr is 1: 2.
The conventional preparation method that mountain bike frame of the present invention is titanium alloy by the preparation method of high fatigue property titanium alloy: select at first as required suitable raw material, press design mix mixing electrode pressing, obtain alloy cast ingot with conventional vacuum consumable electrode arc furnace through secondary or three meltings, after again alloy cast ingot being stripped off the skin and cutting rising head and tail end, at hydrostatic forging machine, carry out time upsetting pulls forging of cogging forging and many fire on the open die forging equipment such as forging hammer and make bar, then bar is made to pipe through conventional double-contracting cover hot extrusion or conventional cross piercing, finally pipe is adopted conventional cold-rolling process to make mountain bike frame finished product tubing.Finished product tubing after heat treatment can be used for making mountain bike frame.
The present invention compared with prior art has the following advantages:
1, titanium alloy intensity of the present invention and plasticity are good, and its temperature-room type plasticity and traditional Ti-3Al-2.5V titanium alloy are suitable, the high 200MPa～250MPa of strength ratio Ti-3Al-2.5V titanium alloy;
2, titanium alloy of the present invention, by with cheap chromium metal and iron, substituting vanadium, reduces the content of precious metal vanadium, thereby has reduced cost, has more excellent cost performance;
3, adopt the standby tubing of titanium alloys of the present invention after heat treatment, it is at horizontal fatigue loading frequency f≤15Hz, tensile force f
1=1200N, pressure F
2under the condition of=600N, its fatigue lifetime, N>=50000 times, met the correlation technique requirement of European standard EN14766-2005.
4, adopt the standby mountain bike frame weight of titanium alloys of the present invention to be less than 1.6Kg, there is the remarkable advantages such as lightweight, high-strength, the life-span is long.
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment
With the high fatigue property titanium alloy, related raw material comprises aluminium vanadium master alloy, electrolysis chromium, titanium sponge, aluminium shot, ferric oxide powder etc. to mountain bike frame of the present invention, and wherein the titanium sponge specification is 0 grade or 1 grade.The mass percent of titanium alloy of the present invention consists of: Al2.5%～3.5%, and V1.0%～2.0%, Fe0.3%～2.0%, Cr0.6%～4.0%, surplus is Ti and inevitable impurity; Preferably, in this titanium alloy, the mass ratio of Fe and Cr is 1: 2.In concrete preparation process, at first as required select suitable raw material, press design mix mixing electrode pressing, obtain alloy cast ingot through secondary or three meltings in conventional vacuum consumable electrode arc furnace, after again alloy cast ingot being stripped off the skin and cutting rising head and tail end, carry out time upsetting pull forging of cogging forging and many fire and make bar on the open die forging equipment such as hydrostatic forging machine, forging hammer, then bar is made to pipe through conventional double-contracting cover hot extrusion or conventional cross piercing, finally pipe is adopted conventional cold-rolling process to make mountain bike frame finished product tubing.Finished product tubing can be used for making mountain bike frame after vacuum heat treatment.The Heating temperature that cogging is forged is 1050 ℃～1150 ℃, and to pull out the Heating temperature of forging be T to pier repeatedly
β-50 ℃～T
β-30 ℃.The temperature of vacuum heat treatment is 700～750 ℃, and the time of vacuum heat treatment is 1h～1.5h.Titanium alloy pipe after heat treatment is at horizontal fatigue loading frequency f≤15Hz, tensile force f
1=1200N and pressure F
2n fatigue lifetime under=600N condition>=50000 times, meet the correlation technique requirement of European standard EN14766-2005.
Embodiment 1
The nominal composition of the present embodiment titanium alloy is: Ti-3Al-1.7V-1Cr-0.5Fe is Al3.0% by weight percentage, V1.7%, and Fe0.5%, Cr1.0%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment titanium alloy is: press nominal composition Ti-3Al-1.7V-1Cr-0.5Fe batching, starting material are used Al-55V master alloy, electrolysis chromium, ferric oxide powder and aluminium shot.Electrode pressing after batch mixing, obtain alloy cast ingot with vacuum consumable electrode arc furnace melting secondary.Control ingot casting impurity element mass content C≤0.1%, N≤0.03%, H≤0.15%, O≤0.15%.Alloy cast ingot, after stripping off the skin and excising rising head and tail end, on flat-die forging equipment, forges through 1100 ℃ of coggings, at T
β-50 ℃～T
β-30 ℃ are carried out after many fire time piers pull out being forged into Ф 105mm bar.Bar is prepared into Ф 65mm * 5mm pipe through conventional double-contracting cover hot extrusion or conventional cross piercing, and pipe is the conventional cold rolling mountain bike frame pipe finished of making on cold reducing mill.Finished product tubing be can be used for making after the vacuum heat treatment of 1.5h the mountain bike vehicle frame in 750 ℃.
Finished product tubing after heat treatment, is tested on horizontal fatigue tester, at frequency f=2Hz, tensile force f
1=1200N, pressure F
2under the condition of=600N, survey N=73000 its fatigue lifetime, meets the correlation technique requirement of European standard EN14766-2005.
Embodiment 2
The nominal composition of the present embodiment titanium alloy is: Ti-3Al-2V-2Cr-1Fe is Al3.0% by weight percentage, V2.0%, and Fe1.0%, Cr2.0%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment titanium alloy is: press nominal composition Ti-3Al-2V-2Cr-1Fe batching, starting material are used Al-85V master alloy, electrolysis chromium, ferric oxide powder and aluminium shot.Electrode pressing after batch mixing, obtain alloy cast ingot with vacuum consumable electrode arc furnace melting secondary.Control ingot casting impurity content C≤0.1%, N≤0.03%, H≤0.15%, O≤0.15%.Ingot casting, after stripping off the skin and excising rising head and tail end, forges through 1150 ℃ of coggings, at T on flat-die forging equipment
β-50 ℃～T
β-30 ℃ are carried out after many fire time piers pull out being forged into Ф 105mm bar.Bar is prepared into Ф 65mm * 5mm pipe through conventional double-contracting cover hot extrusion or conventional cross piercing, and pipe is the conventional cold rolling mountain bike frame pipe finished of making on cold reducing mill.Finished product tubing be can be used for making after the vacuum heat treatment of 1.5h the mountain bike vehicle frame in 700 ℃.
Finished product tubing after heat treatment, is tested on horizontal fatigue tester, at frequency f=2Hz, tensile force f
1=1200N, pressure F
2under the condition of=600N, survey N=100000 its fatigue lifetime, meets the correlation technique requirement of European standard EN14766-2005.
Embodiment 3
The nominal composition of the present embodiment titanium alloy is: Ti-3.2Al-1.5V-1.5Cr-0.75Fe is Al3.2% by weight percentage, V1.5%, and Fe0.75%, Cr1.5%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment titanium alloy is: press nominal composition Ti-3.2Al-1.5V-1.5Cr-0.75Fe batching, starting material are used Al-55V master alloy, electrolysis chromium, ferric oxide powder and aluminium shot.Electrode pressing after batch mixing, obtain alloy cast ingot three times with the vacuum consumable electrode arc furnace melting.Control ingot casting impurity content C≤0.1%, N≤0.03%, H≤0.15%, O≤0.15%.Ingot casting, after stripping off the skin and excising rising head and tail end, forges through 1100 ℃ of coggings, at T on flat-die forging equipment
β-50 ℃～T
β-30 ℃ are carried out after many fire time piers pull out being forged into Ф 135mm bar.Bar is prepared into Ф 65mm * 5mm pipe through conventional double-contracting cover hot extrusion or conventional cross piercing, and pipe is the conventional cold rolling mountain bike frame pipe finished of making on cold reducing mill.Finished product tubing be can be used for making after the vacuum heat treatment of 1.5h the mountain bike vehicle frame in 750 ℃.
Finished product tubing after heat treatment, is tested on horizontal fatigue tester, at frequency f=2Hz, tensile force f
1=1200N, pressure F
2under the condition of=600N, survey N=78000 its fatigue lifetime, meets the correlation technique requirement of European standard EN14766-2005.
Embodiment 4
The nominal composition of the present embodiment titanium alloy is: Ti-2.8Al-1.3V-3.0Cr-1.5Fe is Al2.8% by weight percentage, V1.3%, and Fe1.5%, Cr3.0%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment titanium alloy is: press nominal composition Ti-2.8Al-1.3V-3.0Cr-1.5Fe batching, starting material are used Al-60V master alloy, electrolysis chromium, ferric oxide powder and aluminium shot.Electrode pressing after batch mixing, obtain alloy cast ingot three times with the vacuum consumable electrode arc furnace melting.Control ingot casting impurity content C≤0.1%, N≤0.03%, H≤0.15%, O≤0.15%.Ingot casting, after stripping off the skin and excising rising head and tail end, forges through 1100 ℃ of coggings, at T on flat-die forging equipment
β-50 ℃～T
β-30 ℃ are carried out after many fire time piers pull out being forged into Ф 95mm bar.Bar is prepared into Ф 65mm * 5mm pipe through conventional double-contracting cover hot extrusion or conventional cross piercing, and pipe is the conventional cold rolling mountain bike frame pipe finished of making on cold reducing mill.Finished product tubing be can be used for making after the vacuum heat treatment of 1.5h the mountain bike vehicle frame in 730 ℃.
Finished product tubing after heat treatment, is tested on horizontal fatigue tester, at frequency f=2Hz, tensile force f
1=1200N, pressure F
2under the condition of=600N, survey N=85000 its fatigue lifetime, meets the correlation technique requirement of European standard EN14766-2005.
Embodiment 5
The nominal composition of the present embodiment titanium alloy is: Ti-2.5Al-1.0V-1.0Cr-2.0Fe is Al2.5% by weight percentage, V1.0%, and Fe2.0%, Cr4.0%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment titanium alloy is: press nominal composition Ti-2.5Al-1.0V-1.0Cr-2.0Fe batching, starting material are used Al-80V master alloy, electrolysis chromium, ferric oxide powder and aluminium shot.Electrode pressing after batch mixing, obtain alloy cast ingot three times with the vacuum consumable electrode arc furnace melting.Control ingot casting impurity content C≤0.1%, N≤0.03%, H≤0.15%, O≤0.15%.Ingot casting, after stripping off the skin and excising rising head and tail end, forges through 1100 ℃ of coggings, at T on flat-die forging equipment
β-50 ℃～T
β-30 ℃ are carried out after many fire time piers pull out being forged into Ф 85mm bar.Bar is prepared into Ф 65mm * 5mm pipe through conventional double-contracting cover hot extrusion or conventional cross piercing, and pipe is the conventional cold rolling mountain bike frame pipe finished of making on cold reducing mill.Finished product tubing be can be used for making after the vacuum heat treatment of 1h the mountain bike vehicle frame in 700 ℃.
Finished product tubing after heat treatment, is tested on horizontal fatigue tester, at frequency f=2Hz, tensile force f
1=1200N, pressure F
2under the condition of=600N, survey N=72000 its fatigue lifetime, meets the correlation technique requirement of European standard EN14766-2005.
Embodiment 6
The nominal composition of the present embodiment titanium alloy is: Ti-3.5Al-2.0V-0.6Cr-0.3Fe is Al3.5% by weight percentage, V2.0%, and Fe0.3%, Cr0.6%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment titanium alloy is: press nominal composition Ti-3.5Al-2.0V-0.6Cr-0.3Fe batching, starting material are used Al-50V master alloy, electrolysis chromium, ferric oxide powder and aluminium shot.Electrode pressing after batch mixing, obtain alloy cast ingot three times with the vacuum consumable electrode arc furnace melting.Control ingot casting impurity content C≤0.1%, N≤0.03%, H≤0.15%, O≤0.15%.Ingot casting, after stripping off the skin and excising rising head and tail end, forges through 1100 ℃ of coggings, at T on flat-die forging equipment
β-50 ℃～T
β-30 ℃ are carried out after many fire time piers pull out being forged into Ф 90mm bar.Bar is prepared into Ф 65mm * 5mm pipe through conventional double-contracting cover hot extrusion or conventional cross piercing, and pipe is the conventional cold rolling mountain bike frame pipe finished of making on cold reducing mill.Finished product tubing be can be used for making after the vacuum heat treatment of 1h the mountain bike vehicle frame in 720 ℃.
Finished product tubing after heat treatment, is tested on horizontal fatigue tester, at frequency f=2Hz, tensile force f
1=1200N, pressure F
2under the condition of=600N, survey N=78000 its fatigue lifetime, meets the correlation technique requirement of European standard EN14766-2005.
The above, be only preferred embodiment of the present invention, not the present invention imposed any restrictions.Every any simple modification of above embodiment being done according to the invention technical spirit, change and equivalence change, and all still belong in the protection domain of technical solution of the present invention.
Claims (8)
1. a mountain bike frame high fatigue property titanium alloy, is characterized in that, by the one-tenth of following mass percent, is grouped into: Al2.5%～3.5%, and V1.0%～2.0%, Fe0.3%～2.0%, Cr0.6%～4.0%, surplus is Ti and inevitable impurity; Described mountain bike frame refers to this titanium alloy after heat treatment with the high fatigue property titanium alloy, at horizontal fatigue loading frequency f≤15Hz, tensile force f
1=1200N and pressure F
2n fatigue lifetime under=600N condition>=50000 times.
2. a kind of mountain bike frame high fatigue property titanium alloy according to claim 1, is characterized in that, by the one-tenth of following mass percent, is grouped into: Al3.0%, and V1.7%, Fe0.5%, Cr1.0%, surplus is Ti and inevitable impurity.
3. a kind of mountain bike frame high fatigue property titanium alloy according to claim 1, is characterized in that, by the one-tenth of following mass percent, is grouped into: Al3.0%, and V2.0%, Fe1.0%, Cr2.0%, surplus is Ti and inevitable impurity.
4. a kind of mountain bike frame high fatigue property titanium alloy according to claim 1, is characterized in that, by the one-tenth of following mass percent, is grouped into: Al3.2%, and V1.5%, Fe0.75%, Cr1.5%, surplus is Ti and inevitable impurity.
5. a kind of mountain bike frame high fatigue property titanium alloy according to claim 1, is characterized in that, by the one-tenth of following mass percent, is grouped into: Al2.8%, and V1.3%, Fe1.5%, Cr3.0%, surplus is Ti and inevitable impurity.
6. a kind of mountain bike frame high fatigue property titanium alloy according to claim 1, is characterized in that, by the one-tenth of following mass percent, is grouped into: Al2.5%, and V1.0%, Fe2.0%, Cr4.0%, surplus is Ti and inevitable impurity.
7. a kind of mountain bike frame high fatigue property titanium alloy according to claim 1, is characterized in that, by the one-tenth of following mass percent, is grouped into: Al3.5%, and V2.0%, Fe0.3%, Cr0.6%, surplus is Ti and inevitable impurity.
8. according to the described a kind of mountain bike frame high fatigue property titanium alloy of any one claim in claim 1 to 7, it is characterized in that, in this titanium alloy, the mass ratio of Fe and Cr is 1: 2.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018785A (en) * | 2014-08-21 | 2015-11-04 | 太仓钧浩自行车科技有限公司 | Low-brittleness titanium alloy used for bicycle frame and preparing method thereof |
| CN105018788A (en) * | 2014-08-21 | 2015-11-04 | 太仓钧浩自行车科技有限公司 | Titanium alloy for frame of electric bicycle and preparation method thereof |
| CN105018787A (en) * | 2014-08-21 | 2015-11-04 | 太仓钧浩自行车科技有限公司 | Titanium alloy used for foldable bicycle frame and preparation method of titanium alloy |
| CN108929973A (en) * | 2017-05-24 | 2018-12-04 | 江苏天工科技股份有限公司 | A kind of cycle frame titanium alloy |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978438A (en) * | 2012-12-14 | 2013-03-20 | 西北有色金属研究院 | Medium/high-strength titanium alloy capable of being cold-rolled and enhanced by heat treatment |
-
2013
- 2013-09-14 CN CN201310419518.4A patent/CN103436733B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978438A (en) * | 2012-12-14 | 2013-03-20 | 西北有色金属研究院 | Medium/high-strength titanium alloy capable of being cold-rolled and enhanced by heat treatment |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018785A (en) * | 2014-08-21 | 2015-11-04 | 太仓钧浩自行车科技有限公司 | Low-brittleness titanium alloy used for bicycle frame and preparing method thereof |
| CN105018788A (en) * | 2014-08-21 | 2015-11-04 | 太仓钧浩自行车科技有限公司 | Titanium alloy for frame of electric bicycle and preparation method thereof |
| CN105018787A (en) * | 2014-08-21 | 2015-11-04 | 太仓钧浩自行车科技有限公司 | Titanium alloy used for foldable bicycle frame and preparation method of titanium alloy |
| CN108929973A (en) * | 2017-05-24 | 2018-12-04 | 江苏天工科技股份有限公司 | A kind of cycle frame titanium alloy |
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