CN102836976A - Preparation method for steel plate - Google Patents
Preparation method for steel plate Download PDFInfo
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- CN102836976A CN102836976A CN201210350153XA CN201210350153A CN102836976A CN 102836976 A CN102836976 A CN 102836976A CN 201210350153X A CN201210350153X A CN 201210350153XA CN 201210350153 A CN201210350153 A CN 201210350153A CN 102836976 A CN102836976 A CN 102836976A
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Abstract
The invention relates to a preparation method for a steel plate, which belongs to the technical field of metal plate preparation. The preparation method comprises the following steps of: firstly, adding raw material into a smelting container; heating steel leftover materials in the smelting container to the steel smelting temperature; in an air-pressure or self-weight mode, steel solution in the smelting container drips down from a small hole on the bottom of the smelting container to overlay and cover the steel solution on a plate blank; at the same time that the steel solution is overlaid and covered on the plate blank, a steel metal layer is subjected to thermal mechanical processing while being overlaid and covered; the crystal grain of the overlaid and covered steel metal layer tissue is refined to obtain a prefabricated steel plate blank of a fine grain tissue; and the prefabricated steel plate blank is subjected to machining to obtain the steel plate. The method disclosed by the invention has a low requirement on the raw materials, the raw materials can be abandoned materials, such as steel leftover materials, bar stocks, plate materials and the like, and therefore the production cost is greatly lowered. The technical process is greatly shortened, the production efficiency is greatly improved, and the fine grain steel plates of various ingredients, sizes and shapes can be prepared.
Description
Technical field
The present invention relates to a kind of preparation method of steel plate, belong to the sheet metal preparing technical field.
Background technology
So far, the big manufacturing of the batch of steel plate mainly realizes through traditional hot rolling and cold rolling two kinds of technology modes.
Traditional hot rolling technology flow process briefly is: continuous casting+strand heat tracing+roughing again+finish rolling+cooling (or+batch).At first obtain strand through electric furnace or converter smelting, continuous casting; Strand carries out roughing and finish rolling after heating and being incubated, can obtain the different-thickness steel plate.Traditional hot-rolled product is proceeded cold rolling, can further be reduced steel plate thickness, obtain the cold-rolled steel sheet product of thinner thickness.
Utilize above-mentioned traditional hot rolling or cold-rolling process to carry out steel plate production, exist that technological process is long, energy consumption is high, unit equipment is many, the capital construction cost is high, thereby cause the high shortcoming of production cost.And, when rolling some kind steel plate,, increase energy consumption and roller consumption because intensity improves and significantly increase rolling load, bigger to the damage of equipping, can be economically and the thickness range of actual production hot-rolled product thereby limited, be generally >=2mm.Proceed cold rollingly, can further reduce steel plate thickness, but the further increase of intensity can cause cold rolling having difficulties.Therefore, utilize traditional hot rolling and cold-rolling process to produce steel plate, cost is higher relatively, commercial and uneconomical.
The method for continuous casting sheet band of newly-developed; Changed tradition and controlled the production process of thin plate in the metal working industry, continuous casting, rolling even heat treatment etc. have been integrated, the strip base that makes production through a time online hot rolling with regard to the thin steel band of disposable formation; Simplify production process greatly, shortened the production cycle.
But still there is some problem in the production of traditional hot roll process in thin strap continuous casting technology, as: microalloy element can not remain solid solution in course of hot rolling; Part takes place to be separated out; Cause steel strength to improve, thereby increase rolling load, increase energy consumption and roller consumption; Make can be economically and produce the thickness of hot-rolled product practically also can not be too thin, should be >=more than the 1.5mm; Thereby obtain high in the operation of rolling of ultra-fine brilliant sheet material that superfine microscopic structure obtains to have superhigh intensity to the rolling equipment Capability Requirement, infringement is big; The plate size of preparation receives follow-up rolling equipment capabilities limits etc.
(surpassing) fine grained texture is that metal material has one of precondition of good obdurability, and generally speaking, microscopic structure is tiny more, and then combination of strength and toughness is good more.(surpassing) fine-grained steel with good obdurability helps preparing high performance part.If through smelting and continuous casting process just can directly obtain thin crystalline substance (< 10 μ m) even ultra-fine crystalline substance (< 1 μ m) steel plate; It will be an important breakthrough of steel plate production field; Simplifying production technology greatly, when increasing substantially the steel plate combination property, reducing production costs greatly.
Summary of the invention
The objective of the invention is to propose a kind of preparation method of steel plate; To the existing deficiency that obtains fine-grained steel plate preparation method, propose to adopt the molten drop shop to cover/hot machining or extrusion molding/hot Machining Technology, preparation thin brilliant (< 10 μ m) and ultra-fine crystalline substance (< 1 μ m) steel plate with reduction to raw-material requirement; Improve production efficiency; Reduce production costs, and make the sheet material of preparation organize tiny, stable performance, to be applicable to the multiple sizes finer grain steel sheet of preparation.
The preparation method of the steel plate that the present invention proposes may further comprise the steps:
(1) in melting container, add raw material, raw material is the steel leftover pieces;
(2) open the melting thermal source, the steel leftover pieces in the melting container are heated to the steel smelting temperature, carry out melting, smelting time is 3～5 minutes;
(3) adopt air pressure or deadweight mode; Aperture drips through melting container bottom to make steel solution in the melting container; According to the physical dimension of machining sheet, steel solution shop is overlayed on the slab, the relative moving speed of melting container and machining sheet is: 0.02～0.2 meter per second;
(4) when steel solution shop overlays on the slab; The shop, limit is covered the limit steel metal level is carried out hot machining; Make the grain refinement of the steel metal level tissue that covers of shop, obtain the pre-manufactured steel slab of fine grained texture, hot machining be rolling, forge, stir or vibrate in any;
(5) the pre-manufactured steel slab to above-mentioned steps (4) carries out machining, makes the surfacing of pre-manufactured steel slab, obtains steel plate.
The preparation method of the steel plate that the present invention proposes compares with traditional preparation fine-grained steel plate method, adopt based on the molten drop shop of induction smelting technique cover/hot Machining Technology prepares thin crystalline substance (< 10 μ m) and ultra-fine crystalline substance (< 1 μ m) steel plate, has the following advantages:
1, the preparation method of the steel plate of the present invention's proposition; Adopt the molten drop shop to cover/method of hot machining, can realize deposit metallic material continuously through continuous ejection steel metal bath; The technology circuit of fine-grained steel plate preparation is shortened greatly, and production efficiency improves greatly.Adopt the method for extrusion molding/hot machining, can realize successively spreading continuously covering metal material through the method for continuously extruded shaping tapping wire after heat machining, the technology circuit of fine-grained steel plate preparation is shortened, production efficiency improves.
2, preparation method of the present invention adopts the molten drop shop to cover/method of hot machining, raw material is required low, can be the obsolete materials such as leftover pieces, bar, plate of steel, therefore greatly reduces production cost.Adopt the method for extrusion molding/hot machining, requiring material is bar, less demanding to raw material, has reduced production cost.
3, preparation method of the present invention adopts the molten drop shop to cover/method of hot machining, can be according to the composition of the steel trade mark, and the fine-grained steel plate of the required composition of melting.
4, preparation method of the present invention, the method for employing extrusion molding/hot machining is in the process of preparation steel plate; The steel metal material is in mecystasis all the time; Reduce the input of heating heat, thereby reduced the hot residual stress in the steel plate, reduced the distortion and the cracking of pre-manufactured steel slab.
5, adopt preparation method of the present invention; Can realize the preparation of different material layer composite plate at an easy rate, both can prepare the thin brilliant sheet material of single composition of steel, also can repeat to spread the alloy that covers heterogeneity through this method; The alloy composite plate of preparation multilayer different-alloy composition; Therefore can adapt to different application requirements, and each layer metallic plate all be fine grained texture, the interface of interlayer combines good.
6, preparation method of the present invention can prepare the fine-grained steel plate of various sizes, shape.
7, preparation method of the present invention except being used to prepare steel plate, can also be used to prepare various metallic elements with complicated shape.
The specific embodiment
The preparation method of the steel plate that the present invention proposes may further comprise the steps:
(1) in melting container, add raw material, raw material is the steel leftover pieces;
(2) open the melting thermal source, the steel leftover pieces in the melting container are heated to the steel smelting temperature, carry out melting, smelting time is 3～5 minutes;
(3) adopt air pressure or deadweight mode; Aperture drips through melting container bottom to make steel solution in the melting container; According to the physical dimension of machining sheet, steel solution shop is overlayed on the slab, the relative moving speed of melting container and machining sheet is: 0.02～0.2 meter per second;
(4) when steel solution shop overlays on the slab; The shop, limit is covered the limit steel metal level is carried out hot machining; Make the grain refinement of the steel metal level tissue that covers of shop, obtain the pre-manufactured steel slab of fine grained texture, hot machining be rolling, forge, stir or vibrate in any;
(5) the pre-manufactured steel slab to above-mentioned steps (4) carries out machining, makes the surfacing of pre-manufactured steel slab, obtains steel plate.
The preparation method of above-mentioned steel plate, can also adopt Steel Bar During is raw material, carries out extrusion modling with solid-state mode, detailed process is following:
(1) in extrusion die, add raw material, raw material is a Steel Bar During;
(2) open the heating thermal source, the Steel Bar During in the extrusion die is heated to the smelting temperature of 0.7～0.75 times of steel, be 3～5 minutes heat time heating time;
(3) adopting drift is the steel wire with the Steel Bar During extrusion molding, and the steel wire diameter is less than 10mm, and after the aperture of steel wire bottom extrusion die was extruded, the shop overlayed on the pre-manufactured steel slab.The extrusion die axis normal is in the pre-manufactured steel slab, and the relative moving speed of extrusion die and machining sheet is: 0.02～0.2 meter per second;
(4) when steel wire shop overlays on the pre-manufactured steel slab; Hot machining is carried out to the steel wire that the shop is layed onto pre-manufactured steel slab surface in extrusion molding limit, limit; Steel wire and the pre-manufactured steel slab that the shop is covered linked together; And make the grain refinement of pre-manufactured steel slab tissue, obtain the pre-manufactured steel slab of fine grained texture, hot machining be rolling, forge, stir or vibration in any;
(5) the pre-manufactured steel slab to above-mentioned steps (4) carries out machining, makes the surfacing of pre-manufactured steel slab, obtains steel plate.
Steel plate preparation method of the present invention adopts suitable thermal source, and metals such as steel are carried out melting in specific container, and thermal source can be induction melting crucible, induction melting coil, high energy beam current, radio heater.Melting container can be melting kettle, melting coil etc., adopts methods such as air pressure or dependence deadweight then, and the steel metal bath in the melting container is dripped with the mode of molten drop; The shop is layed onto on the surface of slab; And carry out hot machining to just spreading the metal that still is in good mecystasis that covers, methods such as for example little forging, little rolling, little stirring, little vibration are smashed as-cast structure wherein; Crystal grain thinning improves mechanical property.In order to improve the molten drop cooling velocity, can molten drop directly be layed onto on the metallic plate with cooling system the shop, so further the crystal grain of refinement sheet material.
Steel plate preparation method of the present invention adopts suitable thermal source, metals such as Steel Bar During are heated in extrusion die after; With the Steel Bar During extrusion molding is the steel wire; The steel wire is layed onto on the surface of pre-manufactured steel slab by the shop, and to just spreading the surface that is layed onto the pre-manufactured steel slab, the steel wire that still is in good mecystasis carries out hot machining; Methods such as for example little forging, little rolling, little stirring, little vibration; Realize being connected of steel wire and pre-manufactured steel slab, and the crystal grain of refinement pre-manufactured steel slab, mechanical property improved.In order to improve the cooling velocity of pre-manufactured steel slab, can the steel wire directly be layed onto on the metallic plate with cooling system the shop, so further the crystal grain of refinement sheet material.
Preparation method of the present invention; When preparation contains the steel plate that is prone to the oxidation element; Can under vacuum condition, carry out melting, spread and cover and hot machining, perhaps under vacuum condition, Steel Bar During carried out extrusion molding, spread and cover and hot machining, in case oxidation the steel leftover pieces.
Below introduce the embodiment of the inventive method:
Embodiment 1:
(1) in melting container, add raw material, raw material is sheet material and bar steel leftover pieces;
(2) open the melting thermal source, the steel leftover pieces in the melting container are heated to the steel smelting temperature, carry out melting, smelting time is 3 minutes;
(3) adopt the argon gas pressuring method; The steel solution of melting container is applied the gas pressure of 0.2MPa; Aperture drips through melting container bottom to make steel solution in the melting container, and hole diameter is 5 millimeters, processes 1 square metre of sheet material; Steel solution shop is overlayed on the slab, and the relative moving speed of melting container and machining sheet is: 0.1 meter per second;
(4) when steel solution shop overlays on the slab, the shop, limit is covered the limit steel metal level is stirred, and makes the grain refinement of the steel metal level tissue that the shop covers, and obtains the pre-manufactured steel slab of fine grained texture;
(5) the pre-manufactured steel slab to above-mentioned steps (4) carries out milling, makes the surfacing of pre-manufactured steel slab, obtains steel plate.
Embodiment 2:
(1) in melting container, add raw material, raw material is the steel leftover pieces;
(2) open the melting thermal source, the steel leftover pieces in the melting container are heated to the steel smelting temperature, carry out melting, smelting time is 4 minutes;
(3) adopt the deadweight mode; Aperture drips through melting container bottom to make steel solution in the melting container, and hole diameter is 8 millimeters, processes 1 square metre of sheet material; Steel solution shop is overlayed on the slab, and the relative moving speed of melting container and machining sheet is: 0.2 meter per second;
(4) when steel solution shop overlays on the slab, the shop, limit is covered the limit steel metal level is forged, and makes the grain refinement of the steel metal level tissue that the shop covers, and obtains the pre-manufactured steel slab of fine grained texture;
(5) the pre-manufactured steel slab to above-mentioned steps (4) carries out milling, makes the surfacing of pre-manufactured steel slab, obtains steel plate.
Embodiment 3:
(1) in extrusion die, add raw material, raw material is a Steel Bar During;
(2) open the heating thermal source, the Steel Bar During in the extrusion die is heated to 0.75 times steel smelting temperature, be 3 minutes heat time heating time;
(3) adopting drift is the steel wire with the Steel Bar During extrusion molding, and the steel wire diameter is 5mm, and after the aperture of steel wire bottom extrusion die was extruded, the shop overlayed on the pre-manufactured steel slab.The extrusion die axis normal is in the pre-manufactured steel slab, and the relative moving speed of extrusion die and machining sheet is: 0.1 meter per second;
(4) when steel wire shop overlays on the pre-manufactured steel slab; Stirring and processing is carried out to the steel wire that the shop is layed onto pre-manufactured steel slab surface in extrusion molding limit, limit; Steel wire and the pre-manufactured steel slab that the shop is covered linked together; And make the grain refinement of pre-manufactured steel slab tissue, obtain the pre-manufactured steel slab of fine grained texture;
(5) the pre-manufactured steel slab to above-mentioned steps (4) carries out milling, makes the surfacing of pre-manufactured steel slab, obtains steel plate.
Claims (1)
1. the preparation method of a steel plate is characterized in that this method may further comprise the steps:
(1) in melting container, add raw material, raw material is the steel leftover pieces;
(2) open the melting thermal source, the steel leftover pieces in the melting container are heated to the smelting temperature of steel, carry out melting, smelting time is 3～5 minutes;
(3) adopt air pressure or deadweight mode; Aperture drips through melting container bottom to make steel solution in the melting container; According to the physical dimension of machining sheet, steel solution shop is overlayed on the slab, the relative moving speed of melting container and machining sheet is: 0.02～0.2 meter per second;
(4) when steel solution shop overlays on the slab; The shop, limit is covered the limit steel metal level is carried out hot machining; Make the grain refinement of the steel metal level tissue that covers of shop, obtain the pre-manufactured steel slab of fine grained texture, hot machining be rolling, forge, stir or vibrate in any;
(5) the pre-manufactured steel slab to above-mentioned steps (4) carries out machining, makes the surfacing of pre-manufactured steel slab, obtains steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210350153.XA CN102836976B (en) | 2012-09-19 | 2012-09-19 | Preparation method for steel plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210350153.XA CN102836976B (en) | 2012-09-19 | 2012-09-19 | Preparation method for steel plate |
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| CN102836976A true CN102836976A (en) | 2012-12-26 |
| CN102836976B CN102836976B (en) | 2015-05-27 |
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| CN201210350153.XA Expired - Fee Related CN102836976B (en) | 2012-09-19 | 2012-09-19 | Preparation method for steel plate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104504169A (en) * | 2014-10-23 | 2015-04-08 | 燕山大学 | Structural design of M-shaped novel hole pattern for implementing multidirectional large plastic strain bar rolling |
| CN106222408A (en) * | 2016-08-29 | 2016-12-14 | 芜湖常瑞汽车部件有限公司 | The preparation method of the right front door snap close fixed plate that tensile strength high-alloy steel materials is made |
| CN106244896A (en) * | 2016-08-29 | 2016-12-21 | 芜湖常瑞汽车部件有限公司 | Good automobile front lamp support of the big tensile strength of outer wall hardness and preparation method thereof |
| CN106282749A (en) * | 2016-08-30 | 2017-01-04 | 合肥常青机械股份有限公司 | Reduce surface roughness oil filler liner plate reducing the raising of allowance intensity and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104504169A (en) * | 2014-10-23 | 2015-04-08 | 燕山大学 | Structural design of M-shaped novel hole pattern for implementing multidirectional large plastic strain bar rolling |
| CN106222408A (en) * | 2016-08-29 | 2016-12-14 | 芜湖常瑞汽车部件有限公司 | The preparation method of the right front door snap close fixed plate that tensile strength high-alloy steel materials is made |
| CN106244896A (en) * | 2016-08-29 | 2016-12-21 | 芜湖常瑞汽车部件有限公司 | Good automobile front lamp support of the big tensile strength of outer wall hardness and preparation method thereof |
| CN106282749A (en) * | 2016-08-30 | 2017-01-04 | 合肥常青机械股份有限公司 | Reduce surface roughness oil filler liner plate reducing the raising of allowance intensity and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN102836976B (en) | 2015-05-27 |
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