CN103522072A - Production method of extremely thick copper plate uniform in performance in thickness direction - Google Patents

Production method of extremely thick copper plate uniform in performance in thickness direction Download PDF

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Publication number
CN103522072A
CN103522072A CN201310454897.0A CN201310454897A CN103522072A CN 103522072 A CN103522072 A CN 103522072A CN 201310454897 A CN201310454897 A CN 201310454897A CN 103522072 A CN103522072 A CN 103522072A
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CN
China
Prior art keywords
welding
vacuum
production
thickness
performance
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Pending
Application number
CN201310454897.0A
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Chinese (zh)
Inventor
高强
倪维华
戴佳丽
王建
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Danyang City Rui Xin Composite Co Ltd
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Danyang City Rui Xin Composite Co Ltd
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Filing date
Publication date
Application filed by Danyang City Rui Xin Composite Co Ltd filed Critical Danyang City Rui Xin Composite Co Ltd
Priority to CN201310454897.0A priority Critical patent/CN103522072A/en
Publication of CN103522072A publication Critical patent/CN103522072A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/02Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets

Abstract

The invention provides a production method of an extremely thick copper plate uniform in performance in the thickness direction. Vacuum welding is carried out on a pair of mother blanks, then the blanks are rolled to form the copper plate, continuous casting is adopted in the mother blanks, welding surfaces of the mother blanks are lower surfaces of the continuous casting, and roughness of the mother blanks is larger than 6.3 micrometers; a vacuum composite blank is heated to be rolled, down pressing and rolling are carried out on the vacuum composite blank for the front three gates at a high temperature, down pressing rates of a composite blank with the width less than 1650mm for the front three gates are larger than or equal to 10%, the down pressing rate of a composite blank with the width larger than 1650mm for the first gate is larger than or equal to 5%, and the down pressing rates of the composite blank with the width larger than 1650mm for the second gate and the third gate are both larger than or equal to 10%. According to the production method, sources and dimensions of the mother blanks are wide, and quality is stable; segregation, loosening and other defects do not exist in the center of a copper plate finished product, the yield is high, performance of the copper plate in the thickness direction is uniform, and performance in the Z direction reaches more than 35%.

Description

A kind of thickness directional properties is the production method of special thick copper coin evenly
Technical field
The invention belongs to special thick copper coin (300mm >=h >=100mm) production technical field of metallurgy industry, relate in particular to the production method of performance and the uniform copper coin of metallurgical quality requirement on a kind of thickness direction.
Background technology
Generally by the method for continuous casting, produce thick copper coin, with the continuous casting steel billet of different-thickness, can produce the copper coin that thickness is less than 100mm.But because continuous casting billet center exists segregation, the defect such as loose in process of setting, and these defects cannot obtain larger improvement in follow-up technique.This worsens the uniformity of copper plate thickness direction, and serviceability declines.
The Chinese patent (CN101590596A) of " a kind of method of manufacturing extra-thick plate blank by accumulative roller welding process " by name discloses after the continuous casting billet surface treatment with same size composition of the same race, surrounding weld seam is welded closure in a vacuum, pressure processing compression ratio is 2, and superposed surfaces tissue is identical with matrix.The Chinese patent (CN10439348A) of " a kind of process of producing special heavy plate " by name discloses the technique of using mechanical whole base, vacuum electron beam sealing side seam assembly, temperature control hot rolling to produce special heavy plate.This process has solved center segregation and loose problem with respect to die casting.General copper coin only requires the mechanical property at 1/4 place, but special heavy plate not only requires 1/4 place's performance in engineering application, and require 1/2 place's performance, requiring performance on thickness direction is uniformly, but the process route of above patent does not all provide solution to the homogeneity question of the performance on thickness direction.
Summary of the invention
The object of the invention is to overcome the existing deficiency of above-mentioned prior art, the evenly production method of special thick copper coin (100~300mm) of a kind of thickness directional properties is provided.
The even special thick copper coin of thickness directional properties of the present invention is by forming the rolling after vacuum welding of a pair of female base.
Concrete grammar is as follows:
Described female base adopts continuous casting mode to produce, during continuous casting billet stacking, and useless base place mat for orlop, the superiors depress with useless base, and continuous casting billet is also that the upper and lower surface flatness of female base should be greater than 1.0mm/m 2; The solder side of female base must be the lower surface of former continuous casting billet, and female base needs removing surface, makes solder side surface roughness be greater than 6.3 μ m.
For preventing that oxidative phenomena from occurring, after female base surface treatment, at vacuum chamber, to weld immediately, described welding booth vacuum is less than 1 * 10 -1pa, weldingvoltage 50~150KV, welding current 30~300mA, speed of welding 100~600mm/min.
Composite billet after welding is rolled after heating, rolls rear air cooling, also can carry out modified or normalized treatment, so that the structure refinement of finished product copper coin.The previous three passes of described vacuum composite billet rolling adopts high temperature to depress greatly mode, not only can improve original segregation of continuous casting billet heart portion, the defect such as loose, and by strengthening the infiltration of roll-force, can guarantee the healing completely of composite surface.The composite billet that is less than 1650mm for width requires reduction ratio >=10% of previous three passes; For width, be greater than the composite billet of 1650mm, the reduction ratio of the first passage requires >=5%, but the reduction ratio of two passages subsequently should >=10%.Necessary, the composite billet that is less than 300mm for thickness can carry out two-stage control rolling, and the finishing temperature of first stage recrystallization rolling should be greater than 950 ℃; Second stage is non-recrystallization rolling.In the operation of rolling, when copper plate thickness is greater than 300mm, for preventing that composite billet from upwarping end to end, lower surface processings of spray water of reply copper coin, to guarantee smooth rolling, the thickness of copper coin be rolled down to 300mm below after, can stop spraying water.
The present invention female base used source and size are extensive, steady quality; Finished product copper coin center zero defect, lumber recovery is high; Due to the rolling penetration power at the composite billet 1/4 place center much larger than composite billet, so segregation and the defect such as loose have obtained very big improvement.The copper coin that adopts the present invention to produce, ultrasound examination reaches JB/T4730.3-2005 standard I level level, EN10160 standard S3E4 level and ASTMA578-96 standard C level level, and combination property is good; On thickness direction, the performance of copper coin is even, and Z-direction performance reaches more than 35%.
The specific embodiment
The present invention is further described by the following embodiment.
Embodiment 1
Produce low-welding crack-sensitive yield strength 500MPa rank copper for pressure copper pipe, with 2 blocks of thick continuous casting billets of 150mm, be welded into 290mm composite billet, solder side is selected the lower surface of former continuous casting billet, and more than surface roughness reaches 6.3 μ m, upper and lower surface flatness is 0.5mm/m 2, composite billet width is 1600mm.With vacuum electron beam welding, welding vacuum≤3.7 * 10 -2pa, weldingvoltage 80KV, welding current 80~100mA, speed of welding 200mm/min; Two-stage control is rolled into 150mm steel plate, 1150 ℃ of first stage start rolling temperatures, and finish to gauge is more than 980 ℃, and the drafts of front 3 passages is respectively 10%, 10%, 11%.930 ℃ of secondary open rollings, 800 ℃ of finish to gauges, roll by modifier treatment, quench 930 ℃, 600 ℃ of tempering.Mechanical property is in Table 1.
Embodiment 2
With two blocks of thick continuous casting billets of 300mm, be welded into 580mm composite billet, solder side is selected the lower surface of former continuous casting billet, and more than surface roughness reaches 6.3 μ m, upper and lower surface flatness is 0.5mm/m 2, composite billet width is 1800mm.With vacuum electron beam welding, welding vacuum≤2 * 10 -2pa, weldingvoltage 80KV, welding current 80~100mA, speed of welding 240mm/min; Be rolled into 250mm steel plate, 1150 ℃ of start rolling temperatures, the drafts of front 3 passages is respectively 6%, 10%, 11%.850 ℃ of finish to gauges, when operation of rolling light plate thickness is greater than 300mm, its bottom surface keeps watering, and rolls rear air cooling.Mechanical property is in Table 1.
Table 1 embodiment of the present invention room temperature (18 ℃) mechanical property
Impact temperature is-20 ℃.

Claims (3)

1. a production method for the even special thick copper coin of thickness directional properties, is characterized in that the rolling after vacuum welding of a pair of female base to form; Described female base adopts continuous casting billet, the lower surface that the solder side of female base is continuous casting billet, and solder side roughness is greater than 6.3 μ m; After the heating of vacuum composite billet, be rolled, previous three passes adopts and depresses greatly rolling, width is less than to the composite billet of 1650mm, the reduction ratio all >=10% of previous three passes, width is greater than to the composite billet of 1650mm, reduction ratio >=5% of the first passage, the reduction ratio all >=10% of two, three passages.
2. the production method of the thick copper coin of spy according to claim 1, is characterized in that the upper and lower surface flatness of described female base is greater than 1.0mm/m 2.
3. the production method of the thick copper coin of spy according to claim 1, is characterized in that described vacuum welding carries out in vacuum chamber, and the vacuum of welding booth is less than 1 * 10 -1pa, weldingvoltage 50~150KV, welding current 30~300mA, speed of welding 100~600mm/min.
CN201310454897.0A 2013-09-29 2013-09-29 Production method of extremely thick copper plate uniform in performance in thickness direction Pending CN103522072A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310454897.0A CN103522072A (en) 2013-09-29 2013-09-29 Production method of extremely thick copper plate uniform in performance in thickness direction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310454897.0A CN103522072A (en) 2013-09-29 2013-09-29 Production method of extremely thick copper plate uniform in performance in thickness direction

Publications (1)

Publication Number Publication Date
CN103522072A true CN103522072A (en) 2014-01-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310454897.0A Pending CN103522072A (en) 2013-09-29 2013-09-29 Production method of extremely thick copper plate uniform in performance in thickness direction

Country Status (1)

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CN (1) CN103522072A (en)

Citations (4)

* 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
JP2005152992A (en) * 2003-11-28 2005-06-16 Jfe Steel Kk Method of welding/coating corrosion-resistant thin metallic sheet to surface of thick metallic base material
CN102649123A (en) * 2011-02-25 2012-08-29 宝山钢铁股份有限公司 Method for producing extra thick composite board through dissymmetrical composite rolling
CN103286129A (en) * 2013-07-01 2013-09-11 烟台开发区蓝鲸金属修复有限公司 Copper plate rolling method

Patent Citations (4)

* 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
JP2005152992A (en) * 2003-11-28 2005-06-16 Jfe Steel Kk Method of welding/coating corrosion-resistant thin metallic sheet to surface of thick metallic base material
CN102649123A (en) * 2011-02-25 2012-08-29 宝山钢铁股份有限公司 Method for producing extra thick composite board through dissymmetrical composite rolling
CN103286129A (en) * 2013-07-01 2013-09-11 烟台开发区蓝鲸金属修复有限公司 Copper plate rolling method

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