CN106282776A - A kind of New energy electric bus body lightweight welded tube material and processing method thereof - Google Patents
A kind of New energy electric bus body lightweight welded tube material and processing method thereof Download PDFInfo
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- CN106282776A CN106282776A CN201610798463.6A CN201610798463A CN106282776A CN 106282776 A CN106282776 A CN 106282776A CN 201610798463 A CN201610798463 A CN 201610798463A CN 106282776 A CN106282776 A CN 106282776A
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- new energy
- energy electric
- electric bus
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0807—Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0807—Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off
- B21C37/0811—Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off removing or treating the weld bead
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention discloses a kind of New energy electric bus body lightweight welded tube material BZL550 high-strength light titanium micro-alloyed steel and processing method thereof, it is characterised in that mass percent: C0.06% 0.08%, Si0.005% 0.015%, Mn1.22 1.2, P0.017% 0.019%, S0.001% 0.003%, Ale.0.033% 0.035%, Ti0.01 0.03%, Te98.5% 98.7%；Advantages of the present invention: be obviously improved the quality of New energy electric bus body frame tube, its yield strength reaches more than 460Mpa, tensile strength reaches more than 600Mpa, elongation percentage reaches more than 26%, compares Q235 Material Strength and improves about 1 times；Vehicle body loss of weight reaches more than 28%.
Description
Technical field
The invention belongs to technical field of metal, be specifically related to a kind of New energy electric bus body lightweight welded tube material
Material (BZL550) and processing method thereof.
Background technology
Energy-saving and emission-reduction and environmental protection become the important orientation of current world economy sustainable development.As energy resource consumption and row
The auto industry at amplification family wants to realize sustainable development must reduce fuel oil consumption, reduces disposal of pollutants, and auto industry realizes
One of key measure of target for energy-saving and emission-reduction is automotive light weight technology.Lightweight has more ten for the development of New energy electric passenger vehicle
Important economic society is divided to be worth.According to statistics, automobile often alleviates 10%, conservation of fuel 6-8%, discharges decline 4%, and power
Performance significantly improves.
Automotive light weight technology is mainly made up of vehicle body, electromotor and chassis three part, and automobile frame tube material is as automobile
The main equipment material of vehicle body, its light weight degree is directly connected to the combination property of New-energy electric vehicle.Body of a motor car
The lightweight of frame tube is it is crucial that select new material to substitute existing Q235, Q345 carbon steel material commonly used.From current city
Field is developing new material on probation has the five big classes such as high-strength steel, aluminium alloy, magnesium alloy, composite and engineering plastics, wherein:
The high-strength steel such as Q460, collision performance is strong, and processing technique is ripe, and cost advantage is obvious, but weight loss effect is not as other materials；Aluminum and
Aluminum alloy production process comparative maturity, but bearing capacity, mechanical property etc. still have gap compared with steel；The density of magnesium is low, light weight,
But cost is high, and the when of Life cycle, carbon emission is higher；Plastic products quality is light, processing characteristics is good, but in recycling
During there is problem of environmental pollution, limit its range；Carbon fibre material light weight effect is best, but price is held high
Expensive, processing use technology, equipment difficulty are big, and extensively application difficulty is big.Therefore, technology and cost become restriction body of a motor car include
The greatest problem of automobile entirety lightweight new material application, is also puzzlement China's new material and the difficulty of automobile industry years development
Topic.
Therefore, exploitation lightweight, high-strength, low-cost alloy steel ERW new material and finished product thereof, become New energy electric
Passenger vehicle or even all bodies of a motor car realize the light-weighted task of top priority and key point.
Summary of the invention
In order to solve the problems referred to above, the technical solution used in the present invention is as follows:
A kind of New energy electric bus body lightweight welded tube material (BZL550) and processing method thereof, mass percent:
C0.06%-0.08%, Si0.005%-0.015%, Mn1.22-1.25%, P0.017%-0.019, S0.001%-
0.003%, Ale0.033%-0.035%, Ti0.01-0.03%, Te98.5%-98.7%.
A kind of processing method of New energy electric bus body lightweight welded tube material, step is as follows:
(1) use new cutting tool and operating procedure, carry out a point bar according to the specification of body shell (rectangle) pipe；
(2) use macromolecule resin sand milling material and special processing equipment thereof, high-strength low alloy steel steel band is carried out surface
Reason, removes steel strip surface oxide skin, rust staining and impurity；
(3) charging crop is used instead titanium alloy cutter, it is ensured that the crop quality of this high-strength steel and speed；
(4) roll, the mould of chromium 12 is increased titanium coating, to improve its wear-resisting, pressure performance, adapt to this high-strength steel
Deformation and the needs of shaping；
(5) suitably reduce high-strength strip deformation and shaping speed, weaken BZL550 high-strength light titanium micro-alloyed steel surface and add
Work is hardened；
(6) temperature of raising ratio-frequency welding more than 1460 DEG C；
(7) change tungsten steel alloy welding slag planing tool, it is ensured that face of weld without sand holes, solderless speckle, without overlap joint etc.；
(8) the confinement degree 5% of smoothing roll is increased.
Advantages of the present invention: be obviously improved the quality of New energy electric bus body frame tube, its yield strength reaches
More than 460Mpa, tensile strength reach more than 600Mpa, elongation percentage reaches more than 26%, compare Q235 Material Strength and improve 1
About times；Vehicle body loss of weight reaches more than 28%, is optimized the design of body shell tubular construction further, and vehicle body weight loss effect will
Reach 40%；Reduce 6-8% according to every loss of weight 10%, vehicle fuel rate, discharge reduces by 4% calculating, can reduce fuelling rate
About 30%, discharge reduces about 16%；Security performance, power performance Synchronous lifting simultaneously；Business Economic Benefit and society's effect
Benefit substantially increases.
Detailed description of the invention
A kind of New energy electric bus body lightweight welded tube material, its mass percent: C0.07%, Si0.01%,
Mn1.22-1.25%, P0.018%, S0.002%, Ale0.034%, Ti0.01-0.03%, Te98.6%.
Titanium is most important for strength enhancing and the light weight effect of steel alloy.Titanium reacts shape with the carbon C in molten steel
Become the most tiny, the TiC particle of Dispersed precipitate, austenite dendrites can be refined, improve form and the distribution of eutectic carbide, therefore
In composition designs, control Ti content, at 0.01-0.03%, to be directly added in molten steel.But very few being unfavorable for makes Ti content
Matrix produces enough crystallization nuclei particles and cocrystalization compound carrys out refined carbides；Cross and make the mobility of molten steel at most and fill type
Ability reduces, and is unfavorable for improving workpiece compactness, anti-wear performance is had negative effect, so controlling the upper of titanium in composition designs
It is limited to 0.03%.
Carbon C to strengthening the wear-resisting tissue of material and performance plays an important role, it can solution strengthening, can strengthen again
The phase of carbide, moreover it is possible to promote martensite transfor mation, improves the type that hardens of material；But carbon C not energy content is too many, otherwise can increase material
Material fragility, can make material wear ability reduce very little, controls carbon C 0.07% in this material.
A kind of processing of the New energy electric bus body lightweight welded tube titanium micro-alloyed ERW of BZL550 high-strength light
Method, step is as follows:
(1) use new cutting tool and operating procedure, carry out a point bar according to the specification of body shell (rectangle) pipe；
(2) use macromolecule resin sand milling material and special processing equipment thereof, high-strength low alloy steel steel band is carried out surface
Reason, removes steel strip surface oxide skin, rust staining and impurity；
(3) charging crop is used instead titanium alloy cutter, it is ensured that the crop quality of this high-strength steel and speed；
(4) roll, the mould of chromium 12 is increased titanium coating, to improve its wear-resisting, pressure performance, adapt to this high-strength steel
Deformation and the needs of shaping；
(5) reduce high-strength strip deformation and shaping speed is less than 30 ms/min, weaken BZL550 high-strength light titanium micro-alloyed
Steel Surface Machining is hardened；
(6) ratio-frequency welding speed of welding is down to 30 ms/min；
(7) change tungsten steel alloy welding slag planing tool, it is ensured that weld seam without sand holes, solderless speckle, without overlap joint etc.；
(8) the confinement degree of smoothing roll increases by 5%.
Experimental comparison 1:
Shown by experiment BZL550 material contrast: the titanium micro-alloyed Steel Properties of BZL550 high-strength light and Q235 straight carbon steel material
Material contrasts, hence it is evident that be better than Q235 common carbon steel material, it is achieved be feasible, material property in the lightweight substitute technology of material
Upper guaranteed.
Material static extension test BZL550 high-strength light titanium micro-alloyed steel is compared with Q235: overall tensile strength promotes
15.5%, promoting 25% than energy-absorbing, loss of weight about 28%, yield strength promotes 17.6-29.9%, tensile strength promotes 16.2-
25%, rate elongation of having no progeny promotes 25% mutually.
Experimental comparison 2:
Shown by experiment BZL550 material contrast: what light-high-strength microalloy titanium steel material made is mainly used in visitor
The square tube of 4 kinds of specifications of frame, respectively 50mm × 40mm × 1.5mm, 40mm × 40mm × 1.5mm, 40mm × 40mm ×
1.2mm and 40mm × 30mm × 1.2mm, intercepts sample from molding square tube exemplar, takes length 150mm square tube and be compressed axially
Test and take length 500mm square tube and carry out three point bending test, in conjunction with the report of previous materials test, contrast new material-lightweight
High-strength titanium micro-alloyed steel and the mechanical property difference of original structure material Q235-straight carbon steel,
Result of the test shows: for three-point bending peak load parameter, 3 kinds of specification square tubes (50mm × 40mm × 2.0mm,
40mm × 40mm × 2.0mm and 40mm × 30mm × 2.0mm), new material BZL550 demonstrates that the structure good compared with Q235 is held
Carrying characteristic, structural-load-carrying capacity promotes 21.2%-42.4%.The BZL500 to be realized material in passenger vehicle framework is replaced, identical
Under specification, replacing the original structure material Q235 that thickness is 2mm, new material BZL550 structural thickness should be between 1.5mm-2mm.
For under different load deflections, three-point bending absorbs energy parameter, 3 kinds of specification square tubes (50mm × 40mm × 2.0mm, 40mm ×
40mm × 2.0mm and 40mm × 30mm × 2.0mm), new material BZL550 demonstrates the energy absorption characteristics good compared with Q235, loads
5-70mm structure absorbs energy lift 12.5%-60.6%.
For same size, the rhs-structure of same thickness, new material BZL550 is compressed axially the carrying energy of & three-point bending
Power and energy absorption characteristics are superior to Q235, BZL550 relatively Q235 and are compressed axially bearing capacity and averagely promote 30.5%-41.7%, 3 points
Bending bearing capacity averagely promotes 21.2%-42.4%；BZL550 relatively Q235 is compressed axially loading 45mm and absorbs gross energy lifting
26.9%-46.8%, three-point bending loads 70mm and absorbs gross energy lifting 31.4%-60.6%.From structural level analysis, for
The rhs-structure of same size size, uses new material BZL550 replacement Q235 on the premise of not increasing weight, can realize knot
The lifting of structure performance, i.e. bearing capacity and energy absorption characteristics are obviously improved.Or keep original vehicle Q235 pipe structure identical
Bearer properties, can be selected for relatively thin new material BZL550 (1.5mm < thickness < 2mm) and replaces Q235 (thickness is 2mm) realization effectively
Loss of weight.Laying particular stress in view of existing passenger vehicle framework, structure-property design may be too conservative, if so using and be less than or equal to
The new material BZL550 of 1.5mm replaces former car Q235, although on the weak side in single simple tubing structured testing, but at complete vehicle structure
On be the probability existing and meeting vehicle performance (bending, reverses, and turns, braking, mode, rollover).Concrete needs combines visitor
Car enterprise requirements, carries out car load cae analysis further.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those of ordinary skill in the art in the technical scope that disclosed herein, the change that can readily occur in or replacement, all should contain
Cover within protection scope of the present invention.Therefore, the protection model that protection scope of the present invention should be limited with claims
Enclose and be as the criterion.
Claims (8)
1. New energy electric bus body lightweight welded tube material and a processing method thereof, its material is characterised by percent mass
Ratio: C0.06%-0.08%, Si0.005%-0.015%, Mn1.22-1.25%, P0.017%-0.019%, S0.001%-
0.003%, Ale0.033%-0.035%, Ti0.01-0.03%, Te98.5%-98.7%.
A kind of New energy electric bus body lightweight welded tube material the most according to claim 1, it is characterised in that material
Preferred mass percentage ratio: C0.07%, Si0.01%, Mn1.22-1.25%, P0.018%, S0.002%, Ale0.034%,
Ti0.01-0.03%, Te98.6%.
3. the processing method of a New energy electric bus body lightweight welded tube material, it is characterised in that step is as follows:
(1) use new cutting tool and operating procedure, carry out a point bar according to the specification of body shell (rectangle) pipe；
(2) use macromolecule resin sand milling material and special processing equipment thereof, high-strength low alloy steel steel band is carried out surface process, goes
Except steel strip surface oxide skin, rust staining and impurity；
(3) charging crop is used instead the cutter that hardness is high, it is ensured that the crop quality of this high-strength steel and speed；
(4) roll, the mould of chromium 12 is increased titanium coating, to improve its wear-resisting, pressure performance, adapt to the deformation of this high-strength steel
Needs with shaping；
(5) suitably reducing high-strength strip deformation and shaping speed, the surface weakening the titanium micro-alloyed steel band of BZL550 high-strength light adds
Work is hardened；
(6) temperature of ratio-frequency welding is brought up to more than 1460 DEG C；
(7) change high intensity weld seam welding slag planing tool, it is ensured that face of weld without sand holes, solderless speckle, without overlap joint etc.；
(8) for avoid the flexibility of thin-walled welding pipe to increase, the confinement degree of smoothing roll is suitably increased.
The processing side of a kind of New energy electric bus body lightweight welded tube material (BZL550) the most according to claim 4
Method, it is characterised in that: described step (3) is selected tungsten steel alloy cutter.
The processing method of a kind of New energy electric bus body lightweight welded tube material the most according to claim 4, it is special
Levy and be: described step (5) is reduced to less than 30 ms/min by regulation charging rate by 40 ms/min, reduce high-strength steel band and become
Shape and shaping speed.
The processing method of a kind of New energy electric bus body lightweight welded tube material the most according to claim 4, it is special
Levy and be: the temperature of ratio-frequency welding is brought up to more than 1460 DEG C by described step (6).
The processing method of a kind of New energy electric bus body lightweight welded tube material the most according to claim 4, it is special
Levy and be: in described step (7) weld seam without sand holes, solderless speckle, without overlap joint etc..
The processing side of a kind of New energy electric bus body lightweight welded tube material (BZL550) the most according to claim 4
Method, it is characterised in that: described step increases confinement degree more than 5% by which kind of mode in (8).
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| CN201610798463.6A CN106282776B (en) | 2016-08-31 | 2016-08-31 | A kind of New energy electric bus body lightweight welded tube material and its processing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146814A (en) * | 2019-05-31 | 2019-08-20 | 上海工程技术大学 | The energy-absorbing quantity measuring method and device of carbon fibre composite wrapping metal tube |
| CN111455259A (en) * | 2020-04-22 | 2020-07-28 | 马鞍山钢铁股份有限公司 | Hot-rolled pickled steel plate for electrogalvanizing and production method thereof |
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| CN110146814A (en) * | 2019-05-31 | 2019-08-20 | 上海工程技术大学 | The energy-absorbing quantity measuring method and device of carbon fibre composite wrapping metal tube |
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| CN111455259A (en) * | 2020-04-22 | 2020-07-28 | 马鞍山钢铁股份有限公司 | Hot-rolled pickled steel plate for electrogalvanizing and production method thereof |
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| CN106282776B (en) | 2018-09-25 |
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