CN103215497A - Hot galvanizing steel plate with high strength - Google Patents
Hot galvanizing steel plate with high strength Download PDFInfo
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- CN103215497A CN103215497A CN 201310171033 CN201310171033A CN103215497A CN 103215497 A CN103215497 A CN 103215497A CN 201310171033 CN201310171033 CN 201310171033 CN 201310171033 A CN201310171033 A CN 201310171033A CN 103215497 A CN103215497 A CN 103215497A
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Abstract
The invention relates to a hot galvanizing steel plate with high strength. The steel plate is characterized in that the hot galvanizing steel plate with high strength comprises the chemical components as follows: 0.02-0.20% of C, less than or equal to 0.03% of Si, 0.10-0.60% of Mn, less than or equal to 0.015% of P, less than or equal to 0.010% of S and the balance of Fe and inevitable impure elements. Compared with the prior art, the mechanical performance range of steel is 550-650MPa in yield strength, 550-650MPa in strength of extension, and HR30T70-78. The microstructure is a ferrite fiber structure. The steel plate is suitable for processing and manufacturing of pull rings of food cans meeting roller forming of buildings and the demand of high hardness. The steel plate is good in bending performance, lower in cost and convenient for large-scale popularization.
Description
Technical field
The present invention relates to a kind of high tensile steel plate, relate in particular to a kind of hot-dip galvanized high-strength steel plate, belong to metal material field.
Background technology
Development along with industries such as building, food-processings, every profession and trade all extensively realizes that by the high strength of making part the attenuate steel use, the high strength of material adopts usually and adds expensive alloying element such as elements such as niobium, vanadium and molybdenum, by refined crystalline strengthening, precipitation strength, the heterogeneous reinforced intensity that improves base material, the application of this method can effectively improve the obdurability of material, and can keep better plasticity and good welding property, but this method application can bring the steel plate cost obviously to increase, and is not easy to promote the use of on a large scale.
Through retrieval, patent 02830100.5 discloses a kind of high-strength and high-ductility galvannealed steel sheet and manufacture method thereof of excellent in workability, contain C:0.05～0.15%, Si:0.3～2.0%, Mn:1.0～2.8%, P:0.03% or it is following, S:0.02% or its are following, Al:0.005～0.5%, N:0.0060%, its Tensile strength is greater than 490MPa.But the yield strength of this technical scheme and tensile strength are lower, are not suitable for the food cans draw ring processing and fabricating that building roll forming and high rigidity require, and buckling performance is relatively poor.Therefore, a kind of new method of exigence solves above-mentioned technical problem.
Summary of the invention
The present invention provides a kind of cost lower just at the technical problem that exists in the prior art, a kind of preferably hot-dip galvanized high-strength steel plate of buckling performance.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of hot-dip galvanized high-strength steel plate is characterized in that the chemical ingredients of described pot galvanize high tensile steel plate is as follows, C:0.02～0.20%, and Si :≤0.03%, Mn:0.10-0.60%, P≤0.015%, S≤0.010%, surplus is Fe and inevitable tramp element.
As a kind of improvement of the present invention, the chemical ingredients of described pot galvanize high tensile steel plate is as follows: C:0.05～0.15%, and Si :≤0.02%, Mn:0.20-0.40%, P≤0.010%, S≤0.008%, surplus is Fe and inevitable tramp element.
As a kind of improvement of the present invention, the chemical ingredients of described pot galvanize high tensile steel plate also comprises B, concrete percentage composition is as follows: C:0.02～0.04%, Si :≤0.03%, Mn:0.10-0.40%, P≤0.015%, S≤0.010%, B:0.0010-0.0020%, surplus is Fe and inevitable tramp element.
The chemical ingredients of hot-dip galvanized high-strength steel plate of the present invention is limited to the reasons are as follows in the above-mentioned scope:
[carbon]: important solution strengthening element, C content can directly influence cementite content in the steel matrix in the steel, and along with carbon content increases, cementite content increases in the tissue, and armor plate strength improves relatively.The present invention is according to actual Steel Capacity and hot rolling, cold rolling ability, and the C content range is set at 0.02～0.20%.
[silicon]: ferrite solution strengthening element, concerning the pot galvanize product, the generation surface film oxide was separated out on the steel surface when Si content was high, influenced the platability of substrate, and the Si content among the present invention sets≤0.03%.
[manganese]: important solution strengthening element, in order to guarantee the comprehensive mechanical intensity of steel, add suitable Mn and improve armor plate strength.Mn content span of control of the present invention is Mn:0.10-0.60%.
[sulphur]: the S among the present invention is an impurity element, and according to actual Steel Capacity, it is S≤0.010% that the present invention requires the S span of control.
[phosphorus]: the P among the present invention is an impurity element, and according to actual Steel Capacity, the present invention requires P content to be controlled to be P≤0.015%
[boron]: the boron of trace forms BN in steel, and poly-partially at austenite grain boundary, helps reducing the Ar3 transformation temperature, improves recrystallization temperature, according to steel-making controllability and actual tests span of control 0.001-0.0020% in the claim 4 as a result.
Among the present invention in the manufacture method:
Slab heating temperature: guarantee complete austenitizing and hot-work requirement, Heating temperature is at 1100-1160 ℃.
Finishing temperature: material is that perfect recrystallization is rolling during hot rolling, enters for fear of material that two-phase region is rolling to be caused mixing prosperous, and finishing temperature will be higher than the Ar3 transformation temperature, according to throughput.Therefore to set the finish rolling finishing temperature be 850 ℃～900 ℃ in the present invention.
Coiling temperature: coiling temperature is separated out influential to ferrite grain size and carbide, and in order to obtain tiny ferritic structure and tiny cementite is separated out, the coiling temperature of setting is 550 ℃～640 ℃.
Compression ratio is rolled in acid: 0.25-1.2mm approaches the production of specification galvanizing production and in conjunction with mill production, compression ratio is set in 60%-90% in order to obtain.
Annealing temperature: reply and recrystallization process by annealing process control, keep the cold rolling work hardening that produces, steel band is 520～620 ℃ in the annealing region of the soaking zone of continuous annealing furnace, and the annealing amount time was less than 48 seconds.
Smooth rate: smoothly can improve plate shape, according to the levelling machine ability, setting range 0.2-1.0%
With respect to prior art, the mechanical property scope of steel of the present invention is yield strength 550-650 MPa, tensile strength 550-650 MPa, HR30T 70-78, microstructure is the ferrite fibrous tissue, is applicable to the food cans draw ring processing and fabricating that building roll forming and high rigidity require, and buckling performance is good, and cost is lower, is convenient to large-scale promotion.
Embodiment
In order to deepen the understanding of the present invention and understanding, the present invention is done detailed explanation and introduction below in conjunction with embodiment.
Embodiment 1:
A kind of hot-dip galvanized high-strength steel plate, the chemical ingredients of described pot galvanize high tensile steel plate is as follows, C:0.02%, Si:0.03%, Mn:0.10%, P:0.015%, S:0.010%, surplus is Fe and inevitable tramp element.
Embodiment 2: a kind of hot-dip galvanized high-strength steel plate, and the chemical ingredients of described pot galvanize high tensile steel plate is as follows, C:0.20%, Si:0.02%, Mn:0.60%, P:0.01%, S:0.005%, surplus is Fe and inevitable tramp element.
Embodiment 3: as a kind of improvement of the present invention, the chemical ingredients of described pot galvanize high tensile steel plate is as follows: C:0.05%, and Si:0.01%, Mn:0.20%, P:0.012%, S:0.008%, surplus is Fe and inevitable tramp element.
Embodiment 4: as a kind of improvement of the present invention, the chemical ingredients of described pot galvanize high tensile steel plate is as follows: C:0.15%, and Si:0.02%, Mn:0.40%, P:0.013%, S:0.003%, surplus is Fe and inevitable tramp element.
Embodiment 5: as a kind of improvement of the present invention, the chemical ingredients of described pot galvanize high tensile steel plate also comprises B, and concrete percentage composition is as follows: C:0.04%, Si:0.015%, Mn:0.3%, P:0.01%, S:0.010%, B:0.0010%, surplus is Fe and inevitable tramp element.
Embodiment 6:
As a kind of improvement of the present invention, the chemical ingredients of described pot galvanize high tensile steel plate also comprises B, and concrete percentage composition is as follows: C:0.03%, Si:0.025%, Mn:0.2%, P:0.012%, S:0.008%, B:0.002%, surplus is Fe and inevitable tramp element.
Need to prove that the foregoing description only is preferred embodiment of the present invention, be not used for limiting protection scope of the present invention, done on the basis of such scheme be equal to replace or substitute, all belong to protection scope of the present invention.
Claims (3)
1. a hot-dip galvanized high-strength steel plate is characterized in that, the chemical ingredients of described pot galvanize high tensile steel plate is as follows, C:0.02～0.20%, Si :≤0.03%, Mn:0.10-0.60%, P≤0.015%, S≤0.010%, surplus is Fe and inevitable tramp element.
2. hot-dip galvanized high-strength steel plate according to claim 1 is characterized in that, the chemical ingredients of pot galvanize high tensile steel plate is as follows: C:0.05～0.15%, Si :≤0.02%, Mn:0.20-0.40%, P≤0.010%, S≤0.008%, surplus are Fe and inevitable tramp element.
3. hot-dip galvanized high-strength steel plate according to claim 1, it is characterized in that, the chemical ingredients of pot galvanize high tensile steel plate also comprises B, concrete percentage composition is as follows: C:0.02～0.04%, and Si :≤0.03%, Mn:0.10-0.40%, P≤0.015%, S≤0.010%, B:0.0010-0.0020%, surplus is Fe and inevitable tramp element.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310171033 CN103215497A (en) | 2013-05-10 | 2013-05-10 | Hot galvanizing steel plate with high strength |
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| CN 201310171033 CN103215497A (en) | 2013-05-10 | 2013-05-10 | Hot galvanizing steel plate with high strength |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105088063A (en) * | 2014-05-19 | 2015-11-25 | 上海梅山钢铁股份有限公司 | Work-hardening high-strength steel and manufacturing method thereof |
| CN106756562A (en) * | 2017-01-09 | 2017-05-31 | 天津海钢板材有限公司 | A kind of high strength galvanized steel plate and its production technology |
-
2013
- 2013-05-10 CN CN 201310171033 patent/CN103215497A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105088063A (en) * | 2014-05-19 | 2015-11-25 | 上海梅山钢铁股份有限公司 | Work-hardening high-strength steel and manufacturing method thereof |
| CN105088063B (en) * | 2014-05-19 | 2017-04-26 | 上海梅山钢铁股份有限公司 | Work-hardening high-strength steel and manufacturing method thereof |
| CN106756562A (en) * | 2017-01-09 | 2017-05-31 | 天津海钢板材有限公司 | A kind of high strength galvanized steel plate and its production technology |
| CN106756562B (en) * | 2017-01-09 | 2018-05-11 | 天津海钢板材有限公司 | A kind of high strength galvanized steel plate and its production technology |
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Application publication date: 20130724 |