CN107774711A - A kind of composite blank preparation method for producing ultra-thick steel plates - Google Patents

A kind of composite blank preparation method for producing ultra-thick steel plates Download PDF

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Publication number
CN107774711A
CN107774711A CN201610785787.6A CN201610785787A CN107774711A CN 107774711 A CN107774711 A CN 107774711A CN 201610785787 A CN201610785787 A CN 201610785787A CN 107774711 A CN107774711 A CN 107774711A
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China
Prior art keywords
mrow
rolling
billet
raw material
composite
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Application number
CN201610785787.6A
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Chinese (zh)
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CN107774711B (en
Inventor
韩旭
张坤
丛津功
王若钢
李新玲
乔馨
张紫茵
陈付振
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Angang Steel Co Ltd
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Angang Steel Co Ltd
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • B21B2001/383—Cladded or coated products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • B21B2001/386—Plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/04—Thickness, gauge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/06—Width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/12—Length

Abstract

A kind of composite blank preparation method for producing ultra-thick steel plates, it is characterised in that composite billet intermediate layer material is used as using base among rolling；Particular content is as follows：1st, blank design：Need to reformulate blank specification for final finished specification, it is necessary to formulate corresponding crop end amount and edged amount according to compression ratio；2nd, middle base rolling：Middle base is rolled using 300mm thickness product, using manual rolling, is ensured that previous three passes drafts is not less than 60mm, is ensured that degeneration area form factor is not less than 0.5.The present invention makees the intermediate layer material as composite billet using base among rolling, can be effectively improved the center portion segregation of composite billet product, improve flaw detection qualification rate.

Description

A kind of composite blank preparation method for producing ultra-thick steel plates
Technical field
The present invention relates to a kind of composite blank preparation method of ultra-thick steel plates.
Background technology
The raw materials for production for producing more than 200mm super-thick steel plate in the world at present mainly have two kinds, and one kind is steel ingot, another Kind is composite billet.But there are the following problems for composite billet production：Composite billet is combined using continuous casting billet, and thickness is in 400-900mm Between, in rolling because initial passage torque limit can not realize that super large is depressed, therefore center portion deformation is insufficient, is limited by Continuous casting billet itself center portion is more loose, causes center portion easily to produce segregation, and flaw detection does not conform to.
The content of the invention
It is an object of the invention to provide a kind of composite blank preparation method for the ultra-thick steel plates for producing more than 200mm, uses Base makees the intermediate layer material as composite billet among rolling, can be effectively improved the center portion segregation of composite billet product, improve flaw detection and close Lattice rate.
To achieve the above object, the present invention is achieved through the following technical solutions：
A kind of composite blank preparation method for producing ultra-thick steel plates, middle base is rolled first as composite billet intermediate layer material Material；The middle base through rolling and continuous casting billet are welded into composite billet in vacuum chamber again, particular content is as follows：
1) composite billet finished product blank design
Need to reformulate blank specification for final finished specification, it is necessary to according to compression ratio formulate corresponding crop end amount and Edged amount, it is specially：
Wide+0.283 × finished product of thick thick -0.241 × raw material of -1.12 × finished product of width edged amount=789+0.641 × raw material Wide -598 × broadening ratio -143 × ratio of elongation
Wide+1.58 × trim width of thick thick -1.72 × raw material of+4.40 × finished product of length edged amount=1844-1.13 × raw material - 2322 × broadening ratio+160 × ratio of elongation
Wherein：Broadening ratio=finished width/raw material width；Ratio of elongation=finished product length/raw material length
2) base rolling among
Middle base is rolled using 300mm thickness product, using manual rolling, ensures that previous three passes drafts is not less than 60mm, Ensure that shape parameter of transforming field is not less than 0.5, wherein, shape parameter of transforming field is calculated as follows
For shape parameter of transforming field
R：Working roll roll neck, unit mm
H:Workpiece thickness before rolling, unit mm
h:Workpiece thickness after rolling, unit mm
3) base cutting among
It must assure that middle base cutting is carried out under the conditions of whole process is without magnetic, steel billet operating uses clamp, prohibits the use of electromagnetism Hang；
4) steel billet welds
To reduce arc blow, middle base eventually enters into vacuum chamber with using submerged-arc welding upper and lower two layers of continuous casting billet compound early stage It is welded into composite billet.
Compared with prior art, the beneficial effects of the invention are as follows：
The composite blank preparation method of present invention production more than 200mm ultra-thick steel plates, using base conduct among rolling The intermediate layer material of composite billet, the center portion segregation of composite billet product can be effectively improved, improves flaw detection qualification rate.
Embodiment
Technical scheme is described in further detail below by specific embodiment.
A kind of composite blank preparation method for producing ultra-thick steel plates, middle base is rolled first as composite billet intermediate layer material Material；The middle base through rolling and continuous casting billet are welded into composite billet in vacuum chamber again, particular content is as follows：
1) composite billet finished product blank design
Need to reformulate blank specification for final finished specification, it is necessary to according to compression ratio formulate corresponding crop end amount and Edged amount, it is specially：
Wide+0.283 × finished product of thick thick -0.241 × raw material of -1.12 × finished product of width edged amount=789+0.641 × raw material Wide -598 × broadening ratio -143 × ratio of elongation
Wide+1.58 × trim width of thick thick -1.72 × raw material of+4.40 × finished product of length edged amount=1844-1.13 × raw material - 2322 × broadening ratio+160 × ratio of elongation
Wherein：Broadening ratio=finished width/raw material width；Ratio of elongation=finished product length/raw material length
2) base rolling among
Middle base is rolled using 300mm thickness product, using manual rolling, ensures that previous three passes drafts is not less than 60mm, Ensure that shape parameter of transforming field is not less than 0.5, wherein, shape parameter of transforming field is calculated as follows
For shape parameter of transforming field
R：Working roll roll neck, unit mm
H:Workpiece thickness before rolling, unit mm
h:Workpiece thickness after rolling, unit mm
3) base cutting among
It must assure that middle base cutting is carried out under the conditions of whole process is without magnetic, steel billet operating uses clamp, prohibits the use of electromagnetism Hang；
4) steel billet welds
To reduce arc blow, middle base eventually enters into vacuum chamber with using submerged-arc welding upper and lower two layers of continuous casting billet compound early stage It is welded into composite billet.

Claims (1)

1. a kind of composite blank preparation method for producing ultra-thick steel plates, it is characterised in that base is as composite billet among rolling first Intermediate layer material；The middle base through rolling and continuous casting billet are welded into composite billet in vacuum chamber again, particular content is as follows：
1) composite billet finished product blank design
Need to reformulate blank specification for final finished specification, it is necessary to formulate corresponding crop end amount and edged according to compression ratio Amount, it is specially：
Wide+0.283 × trim width of thick thick -0.241 × raw material of -1.12 × finished product of width edged amount=789+0.641 × raw material - 598 × broadening ratio -143 × ratio of elongation
Wide+1.58 × trim width -2322 of thick thick -1.72 × raw material of+4.40 × finished product of length edged amount=1844-1.13 × raw material × broadening ratio+160 × ratio of elongation
Wherein：Broadening ratio=finished width/raw material width；Ratio of elongation=finished product length/raw material length
2) base rolling among
Middle base is rolled using 300mm thickness product, using manual rolling, is ensured that previous three passes drafts is not less than 60mm, is ensured Shape parameter of transforming field is not less than 0.5, wherein, shape parameter of transforming field is calculated as follows
<mrow> <mi>l</mi> <mo>/</mo> <mover> <mi>h</mi> <mo>&amp;OverBar;</mo> </mover> <mo>=</mo> <mfrac> <msqrt> <mrow> <mi>R</mi> <mi>&amp;Delta;</mi> <mi>h</mi> </mrow> </msqrt> <mfrac> <mrow> <mi>H</mi> <mo>+</mo> <mi>h</mi> </mrow> <mn>2</mn> </mfrac> </mfrac> <mo>=</mo> <mfrac> <mrow> <mn>2</mn> <msqrt> <mrow> <mi>R</mi> <mrow> <mo>(</mo> <mi>H</mi> <mo>-</mo> <mi>h</mi> <mo>)</mo> </mrow> </mrow> </msqrt> </mrow> <mrow> <mi>H</mi> <mo>+</mo> <mi>h</mi> </mrow> </mfrac> </mrow>
For shape parameter of transforming field
R：Working roll roll neck, unit mm
H:Workpiece thickness before rolling, unit mm
h:Workpiece thickness after rolling, unit mm
3) base cutting among
It must assure that middle base cutting is carried out under the conditions of whole process is without magnetic, steel billet operating uses clamp, prohibits the use of electromagnetic lifter；
4) steel billet welds
To reduce arc blow, middle base eventually enters into vacuum chamber welding with using submerged-arc welding upper and lower two layers of continuous casting billet compound early stage Into composite billet.
CN201610785787.6A 2016-08-31 2016-08-31 A kind of composite blank production method producing ultra-thick steel plates Active CN107774711B (en)

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Application Number Priority Date Filing Date Title
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CN107774711B CN107774711B (en) 2019-03-22

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0615466A (en) * 1991-03-05 1994-01-25 Sumitomo Metal Ind Ltd Manufacture of extremely thick wall steel plate
JPH0947803A (en) * 1995-08-03 1997-02-18 Sumitomo Metal Ind Ltd Method for rolling thick steel plate
CN103111464A (en) * 2013-03-05 2013-05-22 北京科技大学 Manufacturing method of super-thick steel plate
CN104117539A (en) * 2014-06-28 2014-10-29 济钢集团有限公司 Composite billet manufacturing and automatic rolling technology for heavy plate mill
CN105251769A (en) * 2014-07-16 2016-01-20 鞍钢股份有限公司 Rolling method for die steel composite steel plate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0615466A (en) * 1991-03-05 1994-01-25 Sumitomo Metal Ind Ltd Manufacture of extremely thick wall steel plate
JPH0947803A (en) * 1995-08-03 1997-02-18 Sumitomo Metal Ind Ltd Method for rolling thick steel plate
CN103111464A (en) * 2013-03-05 2013-05-22 北京科技大学 Manufacturing method of super-thick steel plate
CN104117539A (en) * 2014-06-28 2014-10-29 济钢集团有限公司 Composite billet manufacturing and automatic rolling technology for heavy plate mill
CN105251769A (en) * 2014-07-16 2016-01-20 鞍钢股份有限公司 Rolling method for die steel composite steel plate

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