CN104475447B - A kind of milling method of ocean platform pile leg steel raw material - Google Patents

A kind of milling method of ocean platform pile leg steel raw material Download PDF

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Publication number
CN104475447B
CN104475447B CN201410563471.3A CN201410563471A CN104475447B CN 104475447 B CN104475447 B CN 104475447B CN 201410563471 A CN201410563471 A CN 201410563471A CN 104475447 B CN104475447 B CN 104475447B
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CN
China
Prior art keywords
milling
pass
roughing mill
rolling
ocean platform
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CN201410563471.3A
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Chinese (zh)
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CN104475447A (en
Inventor
刘超群
马丙涛
陈良
张继奎
闻小德
梁艳
尹崇丽
刘兵
葛本伍
陈树振
王宝
谭永彦
刘亚丽
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山东钢铁股份有限公司
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Publication of CN104475447A publication Critical patent/CN104475447A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/16Metal-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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/20Metal-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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a non-continuous process,(e.g. skew rolling, i.e. planetary cross rolling)

Abstract

The invention belongs to steel-working industry, in particular it relates to the milling method of a kind of ocean platform pile leg steel raw material.The ocean platform pile leg of the present invention milling method of steel raw material, comprises the following steps: 1) use diameter of section 650~800mm continuous cast round billets, send into heating furnace, be heated to 1220 DEG C~1250 DEG C, de-scaling after coming out of the stove;2) circle base after de-scaling being sent into roughing mill back and forth to roll, pressure passage is 7~9 passages, and the pass schedule of described roughing mill is case case pass.The present invention justifies strand and ocean platform pile leg steel raw material specification according to the continuous casting of different size, determines suitable roughing passage.The present invention utilizes existing big rod process equipment, greatly reduces investment, and energy consumption reduces, productivity ratio improves, and cost reduces.When using the rolling of big cross section continuous cast round billets, blank substance is big, compression ratio is high, and the raw material internal soundness of production is good.

Description

A kind of milling method of ocean platform pile leg steel raw material

Technical field

The invention belongs to steel-working industry, in particular it relates to a kind of ocean platform pile leg steel raw material Milling method.

Background technology

At present, special heavy plate blank produces typically following several method: production technology China of special heavy plate typically will Thickness is referred to as slab at the steel plate of 20~60mm, and the thickness steel plate more than 60mm is referred to as special heavy plate, produces The commonly used cast slab of production technology of the blank of slab and special heavy plate, forging and stamping base and plate slab and continuous casting steel billet. Existing blank production technology has the disadvantage that (1) continuous casting steel billet has become the main blank of Heavy plate production, but Being limited by technology and equipment aspect, when producing special heavy plate, compression ratio is inadequate.(2) forging and stamping base and breaking down plate are used Base is as blank, and whole flow process project investment is big, energy consumption is high, metal finished product rate is low.For ensureing super-thick steel plate Inherent quality, general require the compression ratio of rolling super-thick steel plate more than 3.0, the most fertile continuous casting Base maximum gauge is 400mm (design thickness maximum 600mm).As smaller in the compression from slab to finished product, make Internal quality of steel plate is become to ensure.

The defect that had in view of the production technology of existing special heavy plate blank, application big cross section continuous cast round billets is raw Produce the ocean platform pile leg method of steel raw material.Utilize existing big rod process equipment, greatly reduce investment, energy Consumption reduces, productivity ratio improves, and cost reduces.When using the rolling of big cross section continuous cast round billets, blank substance is big, compression Ratio is high, and the raw material internal soundness of production is good.

Summary of the invention

The technical problem to be solved in the present invention is how to provide to be used by big cross section continuous cast round billets rolling ocean platform pile leg The method of steel raw material, overcomes the defect of existing extra-thick plate blank material manufacturing technique, and this milling method production efficiency is high, joint The about energy, rolling scope is wide, and the internal soundness of slab is good.

The present invention is achieved through the following technical solutions:

The ocean platform pile leg of the present invention milling method of steel raw material, comprises the following steps:

1) use diameter of section 650~800mm continuous cast round billets, send into heating furnace, be heated to 1220 DEG C~ 1250 DEG C, de-scaling after coming out of the stove;

2) circle base after de-scaling being sent into roughing mill back and forth to roll, pressure passage is 7~9 passages, described roughing mill Pass schedule is case-case pass.

According to the present invention milling method, the pass schedule of described roughing mill is set to case case pass, both can meet Big rod production technology, can realize again special heavy plate steel blank rolling requirements.First pass of described roughing mill uses Unrestricted spread rolls, and is not limited by the sidewall of pass in width metal flow, can freely broadening;According to need Want, it is preferable that first pass opening is 1220mm, and groove depth is 90mm.Follow-up pass meets big as required Bar split rolling method.

The case pass that described roughing mill uses, its sidewall of pass gradient is 10~30 °, and groove depth is 75~90mm, hole In type, chamfering is 10mm≤R≤30mm.

According to the milling method of the present invention, described roughing mill form can be two roller reversibles.

According to the milling method of the present invention, described step 1) preferably employ high-pressure water descaler de-scaling.

As preferably, during roughing mill of the present invention rolling diameter of section 650mm continuous cast round billets, rolling pass is 7 passages, rolling rear billet size is 330mm × 695mm;Described roughing mill rolling diameter of section 800mm continuous casting billet Time, rolling pass is 9 passages, and rolling rear billet size is 380mm × 860mm.

The present invention is applicable to φ 650mm~φ 800mm continuous casting circle strand rolling ocean platform pile leg steel raw material, base Material list is great, compression ratio is high, and the raw material internal soundness of production is good.

The present invention justifies strand and ocean platform pile leg steel raw material specification according to the continuous casting of different size, determines suitably Roughing passage.

The present invention uses big specification continuous cast round billets as raw materials for production, uses big rod to produce equipment, through split rolling method After obtain the present situation of special heavy plate steel blank, overcome at present when producing special heavy plate, owing to continuous casting steel billet is advised The restriction of lattice, substance and compression ratio, and these advantages be current special heavy plate steel raw material commonly use production method institute not Have.

Specifically, one is for using the continuous casting steel billet technique as Heavy plate production blank, and compression ratio is big, Internal soundness is good, and energy consumption is low.

Two is that in rough rolling process, material describes easy to control for using the technique of forging and stamping base, operation of rolling letter Single, lumber recovery is high, low cost.

Three is to utilize existing big rod process equipment, greatly reduces investment, and energy consumption reduces, productivity ratio improves, and becomes This minimizing.

The present invention passes through each reduction in pass of reasonable set, it is ensured that utilizes big rod to produce equipment and successfully rolls ocean Platform leg steel raw material.

The present invention uses the advantage of circular continuous casting billet Direct Rolling ocean platform pile leg steel raw material to be: one, use φ The circle cross section continuous casting billet of 650mm~φ 800mm is as raw material, it is ensured that the big compression ratio under equivalent specifications, adds Upper heavy reduction rolling, it is ensured that the high-quality ocean platform pile leg large-scale production of steel raw material;Two, use Continuous cast round billets milling round steel, can effectively overcome due to side, the cooling of rectangular bloom corner soon, be easily generated when rolling Edge cracks defect;Three, circular blank rolling ocean platform pile leg steel raw material is used, when not only overcoming rolling The edge cracks defect being easily generated, pass soon, is ground during rolling by the side of overcoming, the cooling of rectangular billet corner simultaneously Damage heavier defect, be effectively improved pass steel-passing amount, reduce roll consumption;Four, circular blank is used, Heating-up temperature is uniform, and rolling is stable, size more standard, good product quality.

To sum up, this application big cross section continuous cast round billets produces the ocean platform pile leg method of steel raw material.Profit With existing big rod process equipment, greatly reducing investment, energy consumption reduces, productivity ratio improves, and cost reduces.Adopt When rolling with big cross section continuous cast round billets, blank substance is big, and compression ratio is high, and the raw material internal soundness of production is good.

Accompanying drawing explanation

Fig. 1 is the continuous cast round billets schematic diagram in the present invention, strand a size of φ 650mm.

Fig. 2 is the continuous cast round billets schematic diagram in the present invention, strand a size of φ 800mm.

Fig. 3 is roughing mill pass schematic diagram (unit: mm).

Fig. 4 is that ocean platform pile leg steel raw material (size 330mm × 695mm) cross section after the present invention rolls shows It is intended to (unit: mm).

Fig. 5 is that ocean platform pile leg steel raw material (size 380mm × 860mm) cross section after the present invention rolls shows It is intended to (unit: mm).

Detailed description of the invention

Below in conjunction with embodiment, the detailed description of the invention of the present invention is illustrated.

Embodiment 1

With up-to-standard continuous cast round billets, sectional dimension as shown in Figure 1, for φ 650mm.According to a conventional method will Continuous cast round billets is sent in heating furnace and is heated to about 1250 DEG C, after high-pressure water descaling of coming out of the stove, utilizes manipulator and grip block The steel billet of sideslip in roller transport is just being pushed away, centering roll line send into roughing mill and carry out multi-pass rolling (pass As shown in Figure 3, roll 7 passages altogether, the steel billet cross section after rolling as shown in Figure 4, a height of 380mm, wide For 860mm.Then, by the ocean platform pile leg steel raw material handling produced, collection, production process is completed.

The present invention is applicable to φ 650mm~φ 800mm continuous casting circle strand rolling ocean platform pile leg steel raw material, base Material list is great, compression ratio is high, and the raw material internal soundness of production is good, overcomes continuous casting steel billet in terms of technology and equipment Restriction compression ratio inadequate problem when causing producing special heavy plate.Utilize existing big rod process equipment, pole simultaneously Reducing greatly investment, energy consumption reduces, productivity ratio improves, and cost reduces.And these advantages are that current special heavy plate steel is former The conventional production method of material does not has.

Embodiment 2

With up-to-standard continuous cast round billets, sectional dimension as shown in Figure 2, for φ 800mm.According to a conventional method will Continuous cast round billets is sent in heating furnace and is heated to about 1250 DEG C, after de-scaling of coming out of the stove, utilizes manipulator and grip block at roller In road transport the steel billet of sideslip just pushing away, centering roll line send into roughing mill and carry out multi-pass rolling (pass such as accompanying drawing 3 Shown in), roll 9 passages altogether, the steel billet cross section after rolling as shown in Figure 5, a height of 330mm, a width of 695mm. Then, by the ocean platform pile leg steel raw material handling produced, collection, production process is completed.

The present invention is applicable to φ 650mm~φ 800mm continuous casting circle strand rolling ocean platform pile leg steel raw material, base Material list is great, compression ratio is high, and the raw material internal soundness of production is good, overcomes continuous casting steel billet in terms of technology and equipment Restriction compression ratio inadequate problem when causing producing special heavy plate.Utilize existing big rod process equipment, pole simultaneously Reducing greatly investment, energy consumption reduces, productivity ratio improves, and cost reduces.And these advantages are that current special heavy plate steel is former The conventional production method of material does not has.

Certainly, the present invention can also have various embodiments, in the case of without departing substantially from present invention spirit and essence thereof, Those of ordinary skill in the art can make various corresponding change and modification according to disclosure of the invention, but these phases The change answered and deformation all should belong to the protection domain of appended claims of the invention.

Claims (5)

1. an ocean platform pile leg milling method for steel raw material, comprises the following steps:
1) use diameter of section 650~800mm continuous cast round billets, send into heating furnace, be heated to 1220 DEG C~ 1250 DEG C, de-scaling after coming out of the stove;
2) circle base after de-scaling being sent into roughing mill back and forth to roll, pressure passage is 7~9 passages, described roughing mill Pass schedule is case-case pass;Wherein, the sidewall of pass gradient of described roughing mill is 10~30 °, groove depth be 75~ 90mm, in pass, chamfering is 10mm≤R≤30mm.
Milling method the most according to claim 1, it is characterised in that first pass of described roughing mill uses Unrestricted spread rolls.
Milling method the most according to claim 1, it is characterised in that described roughing mill form is that two rollers are reversible Formula.
Milling method the most according to claim 1, it is characterised in that described step 1) use water under high pressure to remove Squama machine de-scaling.
Milling method the most according to claim 1, it is characterised in that described roughing mill rolling diameter of section 650mm continuous cast round billets, rolling pass is 7 passages;Or, described roughing mill rolling diameter of section 800mm continuous casting Base, rolling pass is 9 passages.
CN201410563471.3A 2014-10-21 2014-10-21 A kind of milling method of ocean platform pile leg steel raw material CN104475447B (en)

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CN110355203A (en) * 2019-06-13 2019-10-22 山东钢铁股份有限公司 A kind of rolling bar forming method of big cross section continuous cast round billets

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT291898B (en) * 1969-05-09 1971-08-10 Voest Ag A method for processing a Stahlgußstranges
US3848447A (en) * 1972-11-06 1974-11-19 Metalform Ab Rolling method and a rolling mill for carrying out the method
JPS5794401A (en) * 1980-12-01 1982-06-11 Sumitomo Metal Ind Ltd Rolling method for large diameter round steel billet
CN2633471Y (en) * 2003-06-23 2004-08-18 宝山钢铁股份有限公司 Steel ingot mold for thick plate blank
CN103273272B (en) * 2013-06-04 2015-05-27 中国科学院金属研究所 Forging-and-rolling compounded forming method for comprehensively promoting internal and external quality of wide and thick plate blanks
CN103801560B (en) * 2014-01-23 2016-06-01 中冶华天工程技术有限公司 Two-roller reversible milling train adopts roll device and the technique of continuous cast round billets Rolling Production

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