CN104046928A - Car body rear longitudinal beam reinforcing plate assembly - Google Patents
Car body rear longitudinal beam reinforcing plate assembly Download PDFInfo
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- CN104046928A CN104046928A CN201410292277.6A CN201410292277A CN104046928A CN 104046928 A CN104046928 A CN 104046928A CN 201410292277 A CN201410292277 A CN 201410292277A CN 104046928 A CN104046928 A CN 104046928A
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- China
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- plate assembly
- car body
- stiffening plate
- side member
- floor side
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Abstract
The invention relates to a car body rear longitudinal beam reinforcing plate assembly. The car body rear longitudinal beam reinforcing plate assembly is characterized by comprising the following components: 7%-17% of C, 14.6% -24.6% of Si, 6% -9% of Mn, less than or equal to 2% of P, less than or equal to 1.5% of S and the balance of iron and residual trace impurities. The car body rear longitudinal beam reinforcing plate assembly disclosed by the technique has the following advantages that 1) the impact resistance is enhanced, the impact force of the reinforcing plate can be up to 3kg / cm, and no crack is generated after a hammer of which the weight is 3kg falls from two meters; 2) the weathering resistance is improved; 3) the flame resistance is improved, 4) the heat resistance and cold resistance are increased and the quality deterioration such as deformation can not be generated at the temperature from -40 DEG C to 120 DEG C, the reinforcing plate assembly is not softened at 135 DEG C and the mechanical and mechanical properties and other properties are not significantly changed in harsh environments; 5) the bendability can be improved.
Description
Technical field
The present invention relates to a kind of assembly, particularly a kind of car body floor side member stiffening plate assembly, belongs to technical field of automobile components.
Background technology
Progress with rapid changepl. never-ending changes and improvements along with scientific and technological development and industry, China Automobile Industry is more and more rapider, the development of automotive engineering requires more and more higher to the structure properties of component, automobile rear longitudinal girder stiffening plate is one of major critical component affecting vehicle safety travel, is also the important factor that affects vehicle performance simultaneously.In prior art, stiffening plate is various, but all has following problem, 1) poor impact resistance; 1) poor heat resistance, winter hardiness are poor, can not environmental facies to severe condition under life-time service, 3) weathering resistance is poor; 4) flame resistivity is poor, and when spontaneous combustion appears in vehicle or cause vehicle to occur case of fire due to other extraneous reasons, the flame resistivity of vehicle stiffening plate is poor.Based on the problems referred to above, those skilled in the art is constantly attempting change always, but effect is undesirable, and therefore, a kind of new technical scheme of exigence addresses the above problem.
Summary of the invention
The present invention, just for the technical problem existing in prior art, provides a kind of car body floor side member stiffening plate assembly and working method thereof, and this stiffening plate has overcome above-mentioned technological deficiency, is convenient to promote the use of on a large scale.
To achieve these goals, the technical solution used in the present invention is as follows, a car body floor side member stiffening plate assembly, is characterized in that, composition and the content of described stiffening plate assembly are as follows, C7%-17%, Si14.6%-24.6%, Mn 6%-9%, P≤2%, S≤1.5%, surplus is iron and remaining trace impurity.
As a modification of the present invention, composition and the content of described stiffening plate assembly are as follows, C 8%-10%, and Si18%-20%, Mn 7%-8%,, P≤1%, S≤1%, surplus is iron and remaining trace impurity.
As a modification of the present invention, said method comprising the steps of 1) material prepares and confirms, confirms that sending into process furnace after errorless heats, 2) preparation roll bending is left on machine; 3) on, wind off volume; 4) leader, smoothing, 5) rinse centering one trimming; 6) waste material is collected, 7) discharging, upset, 8) inspection after construction packing.
As a modification of the present invention, in described step 2, the linear velocity of machine is≤8mm/min.
As a modification of the present invention, temperature in described step 2 in process furnace is 1100 ℃～1230 ℃, slab come out of the stove after at 1123 ℃ of above large edger roll dephosphorize by high pressure water, through the rolling of roughing unit, enter De-scaling box before finishing mill and remove the iron scale producing in rough rolling process, then finishing train rolling, carry out laminar flow cooling after, by reeling machine, be rolled into coil of strip, controlled rolling temperature.
As a modification of the present invention, in described step 2, finishing temperature is set as 840 ℃～870 ℃, 560 ℃～590 ℃ of coiling temperatures, and this technical scheme, for obtaining tiny uniform crystal grain, improves intensity and the toughness of steel.
The common element adopting in technique scheme, does not particularly add precious alloy element, only by suitable Si, improves intensity, reduce Mn content, solve difficult the removing and surface quality problems of the high iron scale causing of Si, make stiffening plate there is high strong plasticity, high surface quality.
In order to reduce production costs, in the technical program, do not add the alloying elements such as Nb, Ti, but adopt lower alloying element Mn, and improve intensity by appropriate more cheap silicon addition, by the reasonable coordination of hot rolling technology, solve Si and improve the scale on surface problem causing, the strength and toughness and the surface quality that make product, all meet existing standard-required, in technique scheme, why arranges like this, specifically the reasons are as follows
C: can improve carbon content, favourable to room temperature strength and the medium temperature intensity of raising steel, but all unfavorable to the plasticity of steel, toughness, formability, weldability, therefore carbon content control is unsuitable too high, the present invention selects C7%-17%.
Si: can there is purify hot metal, reductor, Si has very strong solution strengthening effect after being dissolved in ferrite, and every increase 0.15%Si in carbon steel can make the tensile strength of hot-rolled steel improve 8～9MPa, and yield strength improves 5～6MPa.Content in the technical program is Si14.6%-24.6%.
Mn: improve manganese content in steel, can expand γ district, reduce γ → α transition temperature, expand rolling scope, the chance of growing up of ferrite crystal grain is greatly reduced, thereby promoted grain refining, increase the obdurability of steel, but manganese content is high, the cost of the corresponding increase steel of meeting, also can increase carbon equivalent, be unfavorable for welding, the content in the technical program is Mn 6%-9%.
S: sulphur forms sulfide inclusion in steel, makes its ductility and toughness drop.During steel rolling, because MnS is mingled with along with rolling direction is extended, the anisotropy of steel is increased the weight of, when serious, causing Laminated steel, the content in the technical program is P≤2%,
P: the high cold shortness that increases steel of phosphorus, make the brittle transition temperature of steel increase, the impelling strength of steel is significantly declined, the content in the technical program is S≤1.5%.
With respect to prior art, the advantage of this technology is as follows: 1) shock-resistance strengthens, and the surging force maximum of stiffening plate can reach 3kg/cm, with also flawless under the following two meters of pendants of 3kg hammer; 2) weathering resistance improves, there is the coextruded layer of antiultraviolet on surface, can prevent the tired flavescence of resin that solar ultraviolet causes, surface coextruded layer has chemical bond and absorbs ultraviolet ray and be converted into visible ray, and photosynthesis of plant is had to satisfactory stability effect, open air can guarantee 10 years colour-fast, the stability that keeps every physical index-40 ℃ to 120 ℃ scopes, artificial weathering test 4000 hours, xanthochromia degree is 2, transmittance reduction value only 0.6%; 3) flame resistivity improves, the not spontaneous combustion of stiffening plate itself described in this technical scheme the self-extinguishing having.Meet the ROHS of European Union instruction and strict UL safety standard, UL94 fire-protection rating reaches V0 level, V2 level, HB level.PC plate self burning-point is 580 degrees Celsius, from fire, afterwards from putting out, during burning, can not produce toxic gas, can not encourage spreading of the intensity of a fire; 4) thermotolerance, winter hardiness improve, and in Celsius-40, ℃ to+120 ℃ of temperature ranges, can not cause the quality badnesses such as distortion.Not softening in the time of 135 ℃, its mechanics in rugged environment, mechanical propertys etc. have no significant change; 5) flexible: can at building-site, adopt clod wash mode according to schema, be mounted to arch, semicircle top and window, minimum bending radius is 175 times of employing plate thickness, also can hot bending.
Embodiment
In order to deepen the understanding of the present invention and understanding, below in conjunction with embodiment, the invention will be further described and introduction.
embodiment 1: a kind of car body floor side member stiffening plate assembly, composition and the content of described stiffening plate assembly are as follows, C7%-17%, Si14.6%-24.6%, Mn 6%-9%, P≤2%, S≤1.5%, surplus is iron and remaining trace impurity.
As a modification of the present invention, composition and the content of described stiffening plate assembly are as follows, C 8%-10%, and Si18%-20%, Mn 7%-8%, P≤1%, S≤1%, surplus is iron and remaining trace impurity.
As a modification of the present invention, composition and the content of described stiffening plate assembly are as follows, and C 9%, Si19%, and Mn 8%, and P 0.5%, S0.5%, surplus is iron and remaining trace impurity.
embodiment 2: a kind of car body floor side member stiffening plate assembly working method, said method comprising the steps of 1) material prepares and confirms, confirms that sending into process furnace after errorless heats, 2) preparation roll bending is left on machine; 3) on, wind off volume; 4) leader, smoothing, 5) rinse centering one trimming; 6) waste material is collected, 7) discharging, upset, 8) inspection after construction packing;
In described step 2, the linear velocity of machine is≤8mm/min; Temperature in described step 2 in process furnace is 1100 ℃～1230 ℃, slab come out of the stove after at 1123 ℃ of above large edger roll dephosphorize by high pressure water, through the rolling of roughing unit, before entering finishing mill, De-scaling box is removed the iron scale producing in rough rolling process, then finishing train rolling, carry out laminar flow cooling after, by reeling machine, be rolled into coil of strip, controlled rolling temperature; In described step 2, finishing temperature is set as 840 ℃～870 ℃, 560 ℃～590 ℃ of coiling temperatures.For obtaining tiny uniform crystal grain, improve intensity and the toughness of steel.
It should be noted that above-described embodiment, be not used for limiting protection scope of the present invention, the equivalents of having done on the basis of technique scheme or substitute and all to fall into the scope that the claims in the present invention are protected.
Claims (6)
1. a car body floor side member stiffening plate assembly, is characterized in that, composition and the content of described stiffening plate assembly are as follows, C7%-17%, and Si14.6%-24.6%, Mn 6%-9%, P≤2%, S≤1.5%, surplus is iron and remaining trace impurity.
2. car body floor side member stiffening plate assembly according to claim 1, is characterized in that, composition and the content of described stiffening plate assembly are as follows, C 8%-10%, and Si18%-20%, Mn 7%-8%,, P≤1%, S≤1%, surplus is iron and remaining trace impurity.
3. car body floor side member stiffening plate assembly according to claim 1 and 2, is characterized in that, said method comprising the steps of 1) material prepares and confirms, confirms that sending into process furnace after errorless heats, 2) preparation roll bending is left on machine; 3) on, wind off volume; 4) leader, smoothing, 5) rinse centering one trimming; 6) waste material is collected, 7) discharging, upset, 8) inspection after construction packing.
4. car body floor side member stiffening plate assembly according to claim 3, is characterized in that, in described step 2, the linear velocity of machine is≤8mm/min.
5. car body floor side member stiffening plate assembly according to claim 4, it is characterized in that, temperature in described step 1 in process furnace is 1100 ℃～1230 ℃, slab come out of the stove after at 1123 ℃ of above large edger roll dephosphorize by high pressure water, through the rolling of roughing unit, enter finishing mill before De-scaling box remove the iron scale producing in rough rolling process, then finishing train rolling, carry out laminar flow cooling after, by reeling machine, be rolled into coil of strip, controlled rolling temperature.
6. car body floor side member stiffening plate assembly according to claim 5, is characterized in that, in described step 1, finishing temperature is set as 840 ℃～870 ℃, 560 ℃～590 ℃ of coiling temperatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410292277.6A CN104046928A (en) | 2014-06-26 | 2014-06-26 | Car body rear longitudinal beam reinforcing plate assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410292277.6A CN104046928A (en) | 2014-06-26 | 2014-06-26 | Car body rear longitudinal beam reinforcing plate assembly |
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| CN104046928A true CN104046928A (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410292277.6A Pending CN104046928A (en) | 2014-06-26 | 2014-06-26 | Car body rear longitudinal beam reinforcing plate assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110509012A (en) * | 2019-08-30 | 2019-11-29 | 新程汽车工业有限公司 | The processing technology of new automobile protective plate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724778A (en) * | 2008-10-27 | 2010-06-09 | 上海梅山钢铁股份有限公司 | Steel for automobile beam and with yield strength more than 500 MPa and manufacturing method thereof |
| CN102177277A (en) * | 2008-10-08 | 2011-09-07 | 杰富意钢铁株式会社 | Working process for manufacturing members excellent in chemical conversion treatability |
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2014
- 2014-06-26 CN CN201410292277.6A patent/CN104046928A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102177277A (en) * | 2008-10-08 | 2011-09-07 | 杰富意钢铁株式会社 | Working process for manufacturing members excellent in chemical conversion treatability |
| CN101724778A (en) * | 2008-10-27 | 2010-06-09 | 上海梅山钢铁股份有限公司 | Steel for automobile beam and with yield strength more than 500 MPa and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110509012A (en) * | 2019-08-30 | 2019-11-29 | 新程汽车工业有限公司 | The processing technology of new automobile protective plate |
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Application publication date: 20140917 |