CN104032211B

CN104032211B - A kind of automobile-used protective plate

Info

Publication number: CN104032211B
Application number: CN201410292177.3A
Authority: CN
Inventors: 朱滨
Original assignee: JINGJIANG XINCHENG VEHICLE PARTS CO Ltd
Current assignee: Xincheng Automobile Industry Co., Ltd
Priority date: 2014-06-26
Filing date: 2014-06-26
Publication date: 2016-11-23
Anticipated expiration: 2034-06-26
Also published as: CN104032211A

Abstract

The present invention relates to a kind of novel automobile protective plate, it is characterised in that composition and the content of described protective plate are as follows, C 3% 5%, Si 5% 8%, Mn 2% 7%, P≤1%, S≤1%, surplus is ferrum and the trace impurity of remnants.Relative to prior art, the advantage of the technical program is as follows: 1) resistance to impact strengthens, and the impulsive force maximum of protective plate can reach 5kg/cm, with the most flawless under the following two meters of pendants of 2kg hammer；2) weatherability improves, and there is a coextruded layer of anti-ultraviolet on surface, 3) thermostability, tolerance to cold improve.

Description

A kind of automobile-used protective plate

Technical field

The present invention relates to a kind of protective plate, particularly to a kind of novel automobile protective plate, belong to technical field of automobile components.

Background technology

Development and the progress maked rapid progress of industry along with science and technology, China Automobile Industry is more and more rapider, the development of automotive engineering is more and more higher to the structural performance requirements of parts, automobile-used protective plate is one of major critical component affecting vehicle safety travel, is also the key factor affecting vehicle performance simultaneously.In prior art, protective plate is various, but all there is problems with, and 1) poor impact resistance；1) poor heat resistance, tolerance to cold are poor, it is impossible to life-time service under conditions of environment rather harsh, 3) weatherability is poor；4) flame resistance is poor, and when spontaneous combustion occurs in vehicle or the reason due to other external worlds causes vehicle case of fire occur, the flame resistance of Vehicle protector 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 solves the problems referred to above.

Summary of the invention

The present invention is just for technical problem present in prior art, it is provided that a kind of novel automobile protective plate and processing method thereof, this protective plate overcomes above-mentioned technological deficiency, it is simple 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 kind of novel automobile protective plate, it is characterised in that, composition and the content of described protective plate are as follows, C 3% 5%, Si 5% 8%, Mn 2% 7%, P≤1%, S≤1%, surplus is ferrum and remaining trace impurity.

As a modification of the present invention, composition and the content of described protective plate are as follows, and C 4% 4.5%, Si 6% 7%, Mn 4% 6%, P≤0.5%, S≤0.5%, surplus is ferrum and remaining trace impurity.

As a modification of the present invention, said method comprising the steps of, 1) material prepare and confirm, confirm errorless after send into heating furnace heat, 2) preparation roll bending is left on machine；3) volume is wound off on；4) take the lead, smooth, 5) rinse, 6) waste material collects, 7) discharging, upset, 8) product inspection packaging.

As a modification of the present invention, in described step 2, the linear velocity of machine is≤15mm/min.

As a modification of the present invention, in described step 1, the temperature in heating furnace is 800 DEG C～1150 DEG C, protective plate come out of the stove after big edger roll water under high pressure dephosphorization more than 1000 DEG C, roll through roughing mills, before entering finishing mill, De-scaling box removes the iron scale produced in rough rolling process, then mm finishing mill unit rolling, after carrying out section cooling, it is rolled into coil of strip, controlled rolling temperature by coiling machine.

As a modification of the present invention, in described step 1, finishing temperature is set as 700 DEG C～800 DEG C, coiling temperature 500 DEG C～580 DEG C.

As a modification of the present invention, composition and the content of described protective plate are as follows, C 4.5%, Si 7%, Mn 6%, P0.5%, S0.5%, and surplus is ferrum and remaining trace impurity.

The common element used in technique scheme, particularly without expensive alloying elements, only improves intensity by suitable Si, reduce Mn content, the iron scale difficulty that solution Si height causes is removed and surface quality problems, makes protective plate have high strong plasticity, high surface quality.

In order to reduce production cost, without alloying elements such as Nb, Ti in the technical program, but use relatively low alloying element Mn, and improve intensity, by the reasonable coordination of associated production technique by appropriate more cheap silicon addition, solve Si and improve the scale on surface problem caused, make strength and toughness and the surface quality of product, all meet existing standard-required, technique scheme is the most so arranged, concrete reason is as follows

C: can improve carbon content, to improving the room temperature strength of steel and medium temperature intensity is favourable, but the most unfavorable to the plasticity of steel, toughness, mouldability, solderability, therefore carbon content control is unsuitable too high, and the present invention selects C 3% 5%.

Si: can have purification molten steel, deoxidizer, Si has the strongest solution strengthening effect after being dissolved in ferrite, often increase 0.15%Si in carbon steel, and the tensile strength of hot-rolled steel can be made to improve 8～9MPa, and yield strength improves 5～6MPa.Content in the technical program is Si 5% 8%.

Mn: improve Fe content in steel, γ district can be expanded, reduce γ → α transition temperature, expand rolling scope, the chance of growing up making ferrite crystal grain greatly reduces, thus promote crystal grain refinement, increase the obdurability of steel, but Fe content is high, the cost of steel can be increased accordingly, also can increase carbon equivalent, be unfavorable for welding, the content in the technical program is Mn 2% 7%.

S: sulfur forms sulphide inculsion in steel so that it is ductility and toughness reduce.During steel rolling, owing to MnS is mingled with along with rolling direction extends, making the anisotropy of steel increase the weight of, cause Laminated steel time serious, the content in the technical program is P≤1%,

P: phosphorus height increases the cold brittleness of steel, makes the brittle transition temperature of steel increase, makes the impact flexibility of steel be remarkably decreased, and the content in the technical program is S≤1%.

Relative to prior art, the advantage of the technical program is as follows: 1) resistance to impact strengthens, and the impulsive force maximum of protective plate can reach 5kg/cm, with the most flawless under the following two meters of pendants of 2kg hammer；2) weatherability improves, and there is the coextruded layer of anti-ultraviolet on surface, can prevent the resin fatigue that solar ultraviolet causes from turning yellow, 3) flame resistance improves, itself not spontaneous combustion of protective plate described in this technical scheme the self-extinguishment having.Meeting European Union ROHS instruction and strict UL safety standard, UL94 fire-protection rating reaches V0 level, V2 level, HB level；4) thermostability, tolerance to cold improve, and will not cause the quality deteriorations such as deformation, do not soften when 105 DEG C, its mechanics in rugged environment in-10 DEG C to+110 DEG C temperature ranges Celsius, and mechanical performance etc. has no significant change；5) flexible: can use clod wash mode according to design drawing at building-site, is mounted to arch, semicircle top and window.

Detailed description of the invention

In order to deepen the understanding of the present invention and understanding, below in conjunction with detailed description of the invention, the invention will be further described and introduces.

Embodiment 1: a kind of novel automobile protective plate, composition and the content of described protective plate are as follows, and C 3% 5%, Si 5% 8%, Mn 2% 7%, P≤1%, S≤1%, surplus is ferrum and the trace impurity of remnants.

As a modification of the present invention, composition and the content of described protective plate are as follows, and C 4% 4.5%, Si 6% 7%, Mn 4% 6%, P≤0.5%, S≤0.5%, surplus is ferrum and remaining trace impurity；

Embodiment 2: the processing method of a kind of novel automobile protective plate, said method comprising the steps of, 1) material prepares and confirms, confirm errorless after send into heating furnace and heat, 2) preparation roll bending is left on machine；3) volume is wound off on；4) take the lead, smooth, 5) rinse, 6) waste material collects, 7) discharging, upset, 8) product inspection packaging；In described step 2, the linear velocity of machine is≤15mm/min；In described step 1, the temperature in heating furnace is 800 DEG C～1150 DEG C, protective plate come out of the stove after big edger roll water under high pressure dephosphorization more than 1000 DEG C, roll through roughing mills, before entering finishing mill, De-scaling box removes the iron scale produced in rough rolling process, then mm finishing mill unit rolling, after carrying out section cooling, coiling machine it is rolled into coil of strip, controlled rolling temperature；In described step 1, finishing temperature is set as 700 DEG C～800 DEG C, coiling temperature 500 DEG C～580 DEG C.

It should be noted that above-described embodiment, be not used for limiting protection scope of the present invention, equivalents done on the basis of technique scheme or replacement each fall within the scope that the claims in the present invention are protected.

Claims

1. an automobile-used protective plate, it is characterised in that composition and the content of described protective plate are as follows, C 4% 4.5%, Si 6% 7%, Mn 4% 6%, P≤0.5%, S≤0.5%, surplus is ferrum and remaining trace impurity.

Automobile-used protective plate the most according to claim 1, it is characterised in that preparation method comprises the steps, 1) material prepares and confirms, confirm errorless after send into heating furnace and heat, 2) preparation roll bending is left on machine；3) volume is wound off on；4) take the lead, smooth, 5) rinse, 6) waste material collects, 7) discharging, upset, 8) product inspection packaging；In described step 1), the temperature in heating furnace is 800 DEG C～1150 DEG C, protective plate come out of the stove after big edger roll water under high pressure dephosphorization more than 1000 DEG C, roll through roughing mills, before entering finishing mill, De-scaling box removes the iron scale produced in rough rolling process, then mm finishing mill unit rolling, after carrying out section cooling, is rolled into coil of strip by coiling machine, controlled rolling temperature, described step 2) in the linear velocity of machine be≤15mm/min.

Automobile-used protective plate the most according to claim 2, it is characterised in that finishing temperature is set as 700 DEG C～800 DEG C, coiling temperature 500 DEG C～580 DEG C.

Automobile-used protective plate the most according to claim 3, it is characterised in that composition and the content of described protective plate are as follows, C 4.5%, Si 7%, Mn 6%, P0.5%, S0.5%, surplus is ferrum and remaining trace impurity.