CN108176952A - A kind of manufacturing method of easily super-thick steel plate - Google Patents

A kind of manufacturing method of easily super-thick steel plate Download PDF

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Publication number
CN108176952A
CN108176952A CN201810042947.7A CN201810042947A CN108176952A CN 108176952 A CN108176952 A CN 108176952A CN 201810042947 A CN201810042947 A CN 201810042947A CN 108176952 A CN108176952 A CN 108176952A
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China
Prior art keywords
steel plate
super
thick steel
strand
combined
Prior art date
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Pending
Application number
CN201810042947.7A
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Chinese (zh)
Inventor
孙京波
成小龙
胡淑娥
侯东华
韩启彪
李灿明
杨建勋
刘熙章
李率民
胡晓英
孔雅
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SD Steel Rizhao Co Ltd
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SD Steel Rizhao Co Ltd
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Application filed by SD Steel Rizhao Co Ltd filed Critical SD Steel Rizhao Co Ltd
Priority to CN201810042947.7A priority Critical patent/CN108176952A/en
Publication of CN108176952A publication Critical patent/CN108176952A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P13/00Making metal objects by operations essentially involving machining but not covered by a single other subclass

Abstract

The present invention relates to a kind of manufacturing method of easily super-thick steel plate, dominating process route is:Groove → continuous casting billet interface is beaten at continuous casting billet interface and size cleaning → fluting → conjunction base → bis- protect welding machine backing welding → submerged arc welding machine sealing boxing → drilling → installation vacuum-pumping pipeline → and vacuumize → plugging pipelines processing → composite billet heating → high-pressure water descaling → roughing → finish rolling → cooling → (heat treatment) → flaw detection.Boxing seals after the ingenious working process in interface by treating composite blank, later again to faying face cavity vacuumize process, manufactured composite billet even tissue after rolling is fine and close, improve super-thick steel plate rolling reduction, improve the performance quality of super-thick steel plate, especially the center portion impact of super-thick steel plate and Z-direction (anti-lamellar tearing) performance level greatly improve, and Z-direction performance level can reach more than Z35 ranks.The super-thick steel plate manufacturing approach apparatus small investment of the present invention, pollution-free, low power consuming, and production efficiency are high, at low cost, and organization of production is flexible.

Description

A kind of manufacturing method of easily super-thick steel plate
Technical field
The invention belongs to steel plate manufacturing process areas, and in particular to a kind of manufacturing method of easily super-thick steel plate.
Background technology
With the fast development of Chinese national economy, steel plate is more widely applied the every field such as machinery, building, special It is not that usage amount of the super-thick steel plate of more than 80mm thickness in engineering structure incrementally increases.
At present, in terms of the production of super-thick steel plate, many steel mills are using super thick section conticaster, caststeel ingot, electroslag remelting Steel ingot is produced for raw material base, and the high utilization of capacity of big thickness big cross section casting machine investment is low, and steel ingot energy consumption high pollution weight lumber recovery is low, this two The usual center porosity of kind raw material and segregation defects are serious, and the various mass defect problems for rolling rear steel plate center portion heredity are more, electroslag weight Although melted ingot quality is high but the high productivity of energy consumption is extremely low.In recent years, it is also compound using vacuum electron beam welding there are many steel enterprise Ply rolling technique productions super-thick steel plate, this method production super-thick steel plate need to put into a large amount of fund and build vacuum electron beam welding and set It is standby, and post facility care and maintenance is also required to a large amount of fund input.
Invention content
The purpose of the present invention is to provide a kind of equipment investment is few, pollution-free, low power consuming, and production efficiency is high easily The manufacturing method of super-thick steel plate.
The technical solution adopted by the present invention to solve the technical problems is:A kind of manufacturing method of easily super-thick steel plate, Dominating process route is:Groove → continuous casting billet interface is beaten at continuous casting billet interface and size cleaning → fluting → conjunction base → bis- protect welding machine and beat Back welding → submerged arc welding machine sealing boxing → drilling → installation vacuum-pumping pipeline → vacuumizes → and plugging pipelines processing → composite billet adds Heat → high-pressure water descaling → roughing → finish rolling → cooling → (heat treatment) → flaw detection.
Easily the manufacturing method of super-thick steel plate is as follows:
1) prepare identical two or more than two strand of length and width dimensions, face surrounding to be combined beat at groove to strand Reason, 45 ° of bevel angle, groove face width 30mm;
2) it beats after the completion of groove, to strand, face to be combined carries out deoxidation polishing treatment, ensures the iron oxide in face to be combined All removal is clean for skin, must not there is oxidation black-tape;
3) after the completion of strand mirror polish to be combined, one piece therein to every group of faying face face surrounding to be combined of groover is utilized It slots, face to be combined is cleaned out after the completion of fluting, must not be cut there are iron, greasy dirt, fluting strand separate marking;
4) thorough cleaning is carried out to the face to be combined of strand, is degreased with acetone, dust is removed with industrial dust collector, it will Strand face to be combined is involutory base, closes base requirement four sides and is aligned, protects to weld carrying out bottoming welding with two to surrounding, it is desirable that even weld Continuously, without be mingled with, stomata;
5) it two protects weldering bottoming welding and completes, boxing is sealed using submerged-arc welding, after the completion of submerged arc welding, in composite billet The middle of length direction weld seam is offset from slot strand side 5mm with internal drilling, and drilling depth 30-50mm ensures drilling and fluting chamber Body communicates, and the length direction of composite billet opposite side also drills by this requirement;
6) pipeline connection vacuum pump is made in a drill hole, another drill hole makes pipeline connection vacuum meter, takes out The leakproofness of composite billet inside cavity is detected before vacuum;
7) after sealing propertytest qualification, vacuum pump is opened, vacuum pump operation opens the sealing valve of vacuum pump side again after 1 minute Door, vacuum values, which reach below 1pa, can carry out closure processing;
8) composite billet loading heating furnace is heated, heating reaches 1100 using Segmented heating, final heating temperature DEG C~1250 DEG C, ensure that composite billet temperature is uniform;Roughing mill use the big pressure of low speed technique, start rolling temperature >=1080 DEG C, in Between base thickness be not less than 1.4 times of finished product thickness;Finishing mill ensures there is sufficiently large percentage pass reduction, 850 DEG C of finishing temperature~ 950℃;Obtain super-thick steel plate after rolling, steel plate using water cooling or it is air-cooled cooled down, after being cooled to room temperature, can be required according to user Non-destructive testing is implemented to the steel plate after compound.
Specifically, the Edge Distance interface edge 30mm to slot in the step 3), it is desirable that the width 10mm of slot, depth 5mm。
Specifically, the method for conducting leak test in the step 6) is:Bottled nitrogen is connected in vacuum table side, closes vacuum The sealed valve of pump side is opened nitrogen, is tried at composite billet surrounding weld seam and all connecting tubes with hairbrush brushing suds Leakage if it find that air leakage point need to carry out lower digging weldering processing using angle grinder, until air leakage point is sealed, removes bottled nitrogen.
The invention has the advantages that:The super-thick steel plate manufacturing method of the present invention is by treating the interface of composite blank Boxing seals after ingenious working process, and later again to faying face cavity vacuumize process, manufactured composite billet is organized after rolling Even compact improves super-thick steel plate rolling reduction, improves the heart of the performance quality of super-thick steel plate, especially super-thick steel plate Portion impacts and Z-direction (anti-lamellar tearing) performance level greatly improves, and Z-direction performance level can reach more than Z35 ranks.The present invention Super-thick steel plate manufacturing approach apparatus small investment, pollution-free, low power consuming, and production efficiency is high, at low cost, organization of production flexibly, It is convenient.
Specific embodiment
The following is specific embodiments of the present invention, and technical scheme of the present invention is described further, but the present invention Protection domain is not limited to these embodiments.It is every to be included in the present invention without departing substantially from the change of present inventive concept or equivalent substitute Protection domain within.
A kind of manufacturing method of easily super-thick steel plate is as follows:
1) prepare identical two or more than two strand of length and width dimensions, face surrounding to be combined beat at groove to strand Reason, 45 ° of bevel angle, groove face width 30mm;
2) it beats after the completion of groove, to strand, face to be combined carries out deoxidation polishing treatment, ensures the iron oxide in face to be combined All removal is clean for skin, must not there is oxidation black-tape;
3) after the completion of strand mirror polish to be combined, one piece therein to every group of faying face face surrounding to be combined of groover is utilized Fluting, the Edge Distance interface edge 30mm of fluting, it is desirable that the width 10mm of slot, depth 5mm, by face to be combined after the completion of fluting It cleans out, must not be cut there are iron, greasy dirt, fluting strand separate marking;
4) thorough cleaning is carried out to the face to be combined of strand, is degreased with acetone, dust is removed with industrial dust collector, it will Strand face to be combined is involutory base, closes base requirement four sides and is aligned, protects to weld carrying out bottoming welding with two to surrounding, it is desirable that even weld Continuously, without be mingled with, stomata;
5) it two protects weldering bottoming welding and completes, boxing is sealed using submerged-arc welding, after the completion of submerged arc welding, in composite billet The middle of length direction weld seam is offset from slot strand side 5mm with internal drilling, and drilling depth 30-50mm ensures drilling and fluting chamber Body communicates, and the length direction of composite billet opposite side also drills by this requirement;
6) pipeline connection vacuum pump is made in a drill hole, another drill hole makes pipeline connection vacuum meter, takes out The leakproofness of composite billet inside cavity is detected before vacuum;Method for conducting leak test is:Bottled nitrogen is connected in vacuum table side Gas closes the sealed valve of vacuum pump side, opens nitrogen, with hairbrush brushing fertilizer at composite billet surrounding weld seam and all connecting tubes Soap water carries out leak test, if it find that air leakage point need to carry out lower digging weldering processing using angle grinder, until air leakage point is sealed, removes Bottled nitrogen;
7) after sealing propertytest qualification, vacuum pump is opened, vacuum pump operation opens the sealing valve of vacuum pump side again after 1 minute Door, vacuum values, which reach below 1pa, can carry out closure processing;
8) composite billet loading heating furnace is heated, heating reaches 1100 using Segmented heating, final heating temperature DEG C~1250 DEG C, ensure that composite billet temperature is uniform;Roughing mill use the big pressure of low speed technique, start rolling temperature >=1080 DEG C, in Between base thickness be not less than 1.4 times of finished product thickness;Finishing mill ensures there is sufficiently large percentage pass reduction, 850 DEG C of finishing temperature~ 950℃;Obtain super-thick steel plate after rolling, steel plate using water cooling or it is air-cooled cooled down, after being cooled to room temperature, can be required according to user Non-destructive testing is implemented to the steel plate after compound.

Claims (3)

1. a kind of manufacturing method of easily super-thick steel plate, which is characterized in that include the following steps:
1) prepare identical two or more than two strand of length and width dimensions, to strand, face surrounding to be combined carries out beating groove processing, 45 ° of bevel angle, groove face width 30mm;
2) it beats after the completion of groove, to strand, face to be combined carries out deoxidation polishing treatment, ensures that the iron scale in face to be combined is complete Portion's removal is clean, must not there is oxidation black-tape;
3) it after the completion of strand mirror polish to be combined, is opened using one piece therein to every group of faying face face surrounding to be combined of groover Face to be combined is cleaned out after the completion of fluting, must not be cut there are iron, greasy dirt, fluting strand separate marking by slot;
4) thorough cleaning is carried out to the face to be combined of strand, is degreased with acetone, dust is removed with industrial dust collector, by strand Face to be combined is involutory base, closes base requirement four sides and is aligned, protecting weldering with two to surrounding carrying out bottoming welding, it is desirable that even weld company Continuous, nothing is mingled with, stomata;
5) it two protects weldering bottoming welding and completes, boxing is sealed using submerged-arc welding, after the completion of submerged arc welding, in composite billet length The middle of direction weld seam is offset from slot strand side 5mm with internal drilling, and drilling depth 30-50mm ensures drilling and fluting cavity phase Logical, the length direction of composite billet opposite side also drills by this requirement;
6) pipeline connection vacuum pump is made in a drill hole, another drill hole makes pipeline connection vacuum meter, vacuumizes The preceding leakproofness to composite billet inside cavity is detected;
7) after sealing propertytest qualification, vacuum pump is opened, vacuum pump operation opens the sealed valve of vacuum pump side again after 1 minute, Vacuum values, which reach below 1pa, can carry out closure processing;
8) composite billet loading heating furnace is heated, heating using Segmented heating, final heating temperature reach 1100 DEG C~ 1250 DEG C, ensure that composite billet temperature is uniform;Roughing mill uses the technique of the big pressure of low speed, start rolling temperature >=1080 DEG C, intermediate base Thickness is not less than 1.4 times of finished product thickness;Finishing mill guarantee has sufficiently large percentage pass reduction, finishing temperature 850 DEG C~950 ℃;Obtain super-thick steel plate after rolling, steel plate using water cooling or it is air-cooled cooled down, after being cooled to room temperature, can be required according to user pair Steel plate after compound implements non-destructive testing.
2. the manufacturing method of easily super-thick steel plate as described in claim 1, which is characterized in that slot in the step 3) Edge Distance interface edge 30mm, it is desirable that the width 10mm of slot, depth 5mm.
3. the manufacturing method of easily super-thick steel plate as described in claim 1, which is characterized in that the sealing in the step 6) Property detection method is:Bottled nitrogen is connected in vacuum table side, closes the sealed valve of vacuum pump side, nitrogen is opened, in composite billet Leak test is carried out with hairbrush brushing suds at surrounding weld seam and all connecting tubes, if it find that air leakage point need to be carried out using angle grinder Lower digging weldering processing, until air leakage point is sealed, removes bottled nitrogen.
CN201810042947.7A 2018-01-17 2018-01-17 A kind of manufacturing method of easily super-thick steel plate Pending CN108176952A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111185728A (en) * 2020-01-21 2020-05-22 鞍钢股份有限公司 Low-cost and efficient composite blank assembly process method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102240894A (en) * 2011-06-01 2011-11-16 河北钢铁集团有限公司 Composite manufacturing method of ultra-thick steel plate
CN104588989A (en) * 2014-12-03 2015-05-06 李向民 Production method for stainless steel single side composite rolls
CN105127564A (en) * 2015-08-10 2015-12-09 安徽富煌钢构股份有限公司 Submerged-arc welding process of stainless steel plate larger than 80mm in thickness
CN105714062A (en) * 2014-12-01 2016-06-29 鞍钢股份有限公司 Production method of high strength extra-thick boiler steam drum steel plate
CN107175462A (en) * 2017-05-03 2017-09-19 河钢股份有限公司邯郸分公司 A kind of composite plate blanks preparation method for rolling composite plate
CN107283117A (en) * 2016-04-04 2017-10-24 鞍钢股份有限公司 A kind of method that continuous casting billet composite welding produces super-thick steel plate

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102240894A (en) * 2011-06-01 2011-11-16 河北钢铁集团有限公司 Composite manufacturing method of ultra-thick steel plate
CN105714062A (en) * 2014-12-01 2016-06-29 鞍钢股份有限公司 Production method of high strength extra-thick boiler steam drum steel plate
CN104588989A (en) * 2014-12-03 2015-05-06 李向民 Production method for stainless steel single side composite rolls
CN105127564A (en) * 2015-08-10 2015-12-09 安徽富煌钢构股份有限公司 Submerged-arc welding process of stainless steel plate larger than 80mm in thickness
CN107283117A (en) * 2016-04-04 2017-10-24 鞍钢股份有限公司 A kind of method that continuous casting billet composite welding produces super-thick steel plate
CN107175462A (en) * 2017-05-03 2017-09-19 河钢股份有限公司邯郸分公司 A kind of composite plate blanks preparation method for rolling composite plate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111185728A (en) * 2020-01-21 2020-05-22 鞍钢股份有限公司 Low-cost and efficient composite blank assembly process method

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Application publication date: 20180619

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