CN104475447A - Ocean platform pile leg steel raw material rolling method - Google Patents
Ocean platform pile leg steel raw material rolling method Download PDFInfo
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- CN104475447A CN104475447A CN201410563471.3A CN201410563471A CN104475447A CN 104475447 A CN104475447 A CN 104475447A CN 201410563471 A CN201410563471 A CN 201410563471A CN 104475447 A CN104475447 A CN 104475447A
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- 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
- B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/20—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 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)
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Abstract
The invention belongs to the field of iron machining and particularly relates to an ocean platform pile leg steel raw material rolling method. The ocean platform pile leg steel raw material rolling method comprises the followings steps of (1) feeding continuous cast round billets with the section diameters from 650 to 800mm to a heating furnace, heating to 1220 DEG C and 1250 DEG C and descaling after discharging; (2) feeding the round billets after descaling to a roughing mill to be rolled repeatedly, wherein the number of pressing times is from 7 to 9 and a roll pass system of the roughing mill is a box-box roll pass system. According to the ocean platform pile leg steel raw material rolling method, the existing large bar material technology equipment is utilized, the investment is greatly reduced, the energy consumption is reduced, the production rate is improved, the costs are reduced, and the single blank weight is large, the compression ratio is high, and the interior quality of produced raw materials is good when the large-section continuous casting cast round billets are adopted to be rolled.
Description
Technical field
The invention belongs to steel-working industry, particularly, the present invention relates to a kind of milling method of ocean platform pile leg steel raw material.
Background technology
At present, special heavy plate blank is produced generally following several method: thickness is generally called slab at the steel plate of 20 ~ 60mm by production technology China of special heavy plate, and steel plate thickness being greater than 60mm is called special heavy plate, the production technology of producing the blank of slab and special heavy plate generally adopts cast slab, forging and stamping base and plate slab and continuous casting steel billet.The defect that existing blank production technology exists is: (1) continuous casting steel billet has become the main blank of Heavy plate production, but is subject to the restriction of technology and equipment aspect, and during production special heavy plate, compression ratio is inadequate.(2) adopt forging and stamping base and plate slab as blank, whole flow process project investment is large, energy consumption is high, metal finished product rate is low.For ensureing the inherent quality of super-thick steel plate, the compression ratio of General Requirements rolling super-thick steel plate is greater than 3.0, and fertile continuous casting billet maximum gauge is 400mm (the maximum 600mm of design thickness) in the world at present.As smaller in the compression from slab to finished product, cause internal quality of steel plate to ensure.
In view of the defect that the production technology of existing special heavy plate blank has, the application method of big cross section continuous cast round billets production ocean platform pile leg with steel raw material.Utilize existing big rod process equipment, greatly reduce investment, energy consumption reduction, productivity ratio improve, cost reduction.When adopting big cross section continuous cast round billets rolling, blank substance is large, 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 how to provide the method by big cross section continuous cast round billets rolling ocean platform pile leg steel raw material, overcome the defect of existing extra-thick plate blank material manufacturing technique, this milling method production efficiency is high, economize energy, rolling scope is wide, and the internal soundness of slab is good.
The present invention is achieved through the following technical solutions:
The milling method of ocean platform pile leg steel raw material of the present invention, comprises the following steps:
1) adopt the continuous cast round billets of diameter of section 650 ~ 800mm, 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 is sent into the reciprocal rolling of roughing mill, pressure passage is 7 ~ 9 passages, and the pass schedule of described roughing mill is case-case pass.
According to milling method of the present invention, 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 billet material rolling requirements.Described roughing mill first pass adopts unrestricted spread rolling, does not limit in width metal flow by the sidewall of pass, can freely broadening; As required, preferably, first pass opening is 1220mm, and groove depth is 90mm.Follow-up pass meets big rod split rolling method as required.
The case pass that described roughing mill adopts, its sidewall of pass gradient is 10 ~ 30 °, and groove depth is 75 ~ 90mm, and in pass, chamfering is 10mm≤R≤30mm.
According to milling method of the present invention, described roughing mill form can be two roller reversibles.
According to milling method of the present invention, described step 1) preferably adopt high-pressure water descaler de-scaling.
As preferably, during roughing mill rolling diameter of section 650mm continuous cast round billets of the present invention, rolling pass is 7 passages, and rolling rear billet size is 330mm × 695mm; During described roughing mill rolling diameter of section 800mm continuous casting billet, 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, and blank substance is large, compression ratio is high, and the raw material internal soundness of production is good.
The present invention, according to the continuous casting circle strand of different size and ocean platform pile leg steel raw material specification, determines suitable roughing passage.
The present invention adopts large gauge continuous cast round billets as raw materials for production, use big rod production equipment, the present situation of special heavy plate steel billet material is obtained after split rolling method, overcome at present when producing special heavy plate, because continuous casting steel billet is subject to the restriction of specification, substance and compression ratio, and these advantages are current special heavy plate steel raw materials commonly uses production method and do not have.
Particularly, one be relative to use continuous casting steel billet as Heavy plate production blank technique for, compression ratio is large, and 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, and the operation of rolling is simple, and lumber recovery is high, and cost is low.
Three is utilize existing big rod process equipment, greatly reduces investment, and energy consumption reduces, productivity ratio improves, cost reduction.
The present invention, by each reduction in pass of reasonable set, ensure that and utilizes big rod production equipment success rolling ocean platform pile leg steel raw material.
The present invention adopts the advantage of circular continuous casting billet Direct Rolling ocean platform pile leg steel raw material to be: one, adopt the circle cross section continuous casting billet of φ 650mm ~ φ 800mm as raw material, the large compression ratio under equivalent specifications can be ensured, add heavy reduction rolling, the large-scale production of high-quality ocean platform pile leg steel raw material can be ensured; Two, use continuous cast round billets milling round steel, effectively can overcome because side, rectangular bloom corner cool fast, easily produce edge cracks defect when rolling; Three, circular blank rolling ocean platform pile leg steel raw material is used, the edge cracks defect easily produced when not only overcoming rolling, the side of overcoming, rectangular billet corner cool fast simultaneously, defect heavier to pass collocation during rolling, effectively improve pass steel-passing amount, reduce roll consumption; Four, use circular blank, heating-up temperature is even, and rolling is stablized, and size is standard comparatively, good product quality.
To sum up, this application method of big cross section continuous cast round billets production ocean platform pile leg with steel raw material.Utilize existing big rod process equipment, greatly reduce investment, energy consumption reduction, productivity ratio improve, cost reduction.When adopting big cross section continuous cast round billets rolling, blank substance is large, 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, and strand is of a size of φ 650mm.
Fig. 2 is the continuous cast round billets schematic diagram in the present invention, and strand is of a size of φ 800mm.
Fig. 3 is roughing mill pass schematic diagram (unit: mm).
Fig. 4 is ocean platform pile leg steel raw material (size 330mm × 695mm) schematic cross-section (unit: mm) after rolling of the present invention.
Fig. 5 is ocean platform pile leg steel raw material (size 380mm × 860mm) schematic cross-section (unit: mm) after rolling of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the specific embodiment of the present invention is described.
Embodiment 1
With up-to-standard continuous cast round billets, sectional dimension as shown in Figure 1, is φ 650mm.According to a conventional method continuous cast round billets is sent in heating furnace and be heated to about 1250 DEG C, come out of the stove after high-pressure water descaling, utilize that manipulator and grip block are pushing away the steel billet of sideslip in roller transport just, centering roll line send into roughing mill and carry out multi-pass rolling (pass as shown in Figure 3, rolling 7 passage altogether, steel billet cross section after rolling as shown in Figure 4, height is 380mm, and wide is 860mm.Then, by produce the handling of ocean platform pile leg steel raw material, collection, complete production process.
The present invention is applicable to φ 650mm ~ φ 800mm continuous casting circle strand rolling ocean platform pile leg steel raw material, blank substance is large, compression ratio is high, the raw material internal soundness of producing is good, overcomes the problem that when restriction of continuous casting steel billet in technology and equipment causes producing special heavy plate, compression ratio is inadequate.Utilize existing big rod process equipment simultaneously, greatly reduce investment, energy consumption reduction, productivity ratio improve, cost reduction.And these advantages are current special heavy plate steel raw materials commonly uses production method and do not have.
Embodiment 2
With up-to-standard continuous cast round billets, sectional dimension as shown in Figure 2, is φ 800mm.According to a conventional method continuous cast round billets is sent in heating furnace and be heated to about 1250 DEG C, come out of the stove after de-scaling, utilize that manipulator and grip block are pushing away the steel billet of sideslip in roller transport just, centering roll line send into roughing mill and carry out multi-pass rolling (pass as shown in Figure 3), rolling 9 passage altogether, steel billet cross section after rolling as shown in Figure 5, height is 330mm, and wide is 695mm.Then, by produce the handling of ocean platform pile leg steel raw material, collection, complete production process.
The present invention is applicable to φ 650mm ~ φ 800mm continuous casting circle strand rolling ocean platform pile leg steel raw material, blank substance is large, compression ratio is high, the raw material internal soundness of producing is good, overcomes the problem that when restriction of continuous casting steel billet in technology and equipment causes producing special heavy plate, compression ratio is inadequate.Utilize existing big rod process equipment simultaneously, greatly reduce investment, energy consumption reduction, productivity ratio improve, cost reduction.And these advantages are current special heavy plate steel raw materials commonly uses production method and do not have.
Certainly; the present invention can also have various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can openly make various corresponding change and modification according to of the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (6)
1. an ocean platform pile leg milling method for steel raw material, comprises the following steps:
1) adopt the continuous cast round billets of diameter of section 650 ~ 800mm, 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 is sent into the reciprocal rolling of roughing mill, pressure passage is 7 ~ 9 passages, and the pass schedule of described roughing mill is case-case pass.
2. milling method according to claim 1, is characterized in that, described roughing mill first pass adopts unrestricted spread rolling.
3. milling method according to claim 1, is characterized in that, the case pass that described roughing mill adopts, and its sidewall of pass gradient is 10 ~ 30 °, and groove depth is 75 ~ 90mm, and in pass, chamfering is 10mm≤R≤30mm.
4. milling method according to claim 1, is characterized in that, described roughing mill form is two roller reversibles.
5. milling method according to claim 1, is characterized in that, described step 1) adopt high-pressure water descaler de-scaling.
6. milling method according to claim 1, is characterized in that, described roughing mill rolling diameter of section 650mm continuous cast round billets, and rolling pass is 7 passages; Or described roughing mill rolling diameter of section 800mm continuous casting billet, rolling pass is 9 passages.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410563471.3A CN104475447B (en) | 2014-10-21 | 2014-10-21 | A kind of milling method of ocean platform pile leg steel raw material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410563471.3A CN104475447B (en) | 2014-10-21 | 2014-10-21 | A kind of milling method of ocean platform pile leg steel raw material |
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| CN104475447A true CN104475447A (en) | 2015-04-01 |
| CN104475447B CN104475447B (en) | 2016-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3710436A (en) * | 1969-05-09 | 1973-01-16 | Voest Ag | Method for the production of plates |
| 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 |
| CN103273272A (en) * | 2013-06-04 | 2013-09-04 | 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 |
| CN103801560A (en) * | 2014-01-23 | 2014-05-21 | 中冶华天工程技术有限公司 | Two-roller reversible mill roller device and technology using continuous casting round billets for carrying out rolling production |
-
2014
- 2014-10-21 CN CN201410563471.3A patent/CN104475447B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3710436A (en) * | 1969-05-09 | 1973-01-16 | Voest Ag | Method for the production of plates |
| 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 |
| CN103273272A (en) * | 2013-06-04 | 2013-09-04 | 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 |
| CN103801560A (en) * | 2014-01-23 | 2014-05-21 | 中冶华天工程技术有限公司 | Two-roller reversible mill roller device and technology using continuous casting round billets for carrying out rolling production |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN104475447B (en) | 2016-12-07 |
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