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Method for producing narrow-thickness-tolerance X12Ni5 steel through single-rack steckel mill

A technology of thickness tolerance and steckel rolling mill, which is applied in the field of rolling narrow thickness tolerance steel plates and producing narrow thickness tolerance X12Ni5, can solve the problems of thickness precision control, etc., achieve stable control, improve enterprise economic benefits and market competitiveness, and improve Yield effect

Pending Publication Date: 2021-03-12
NANJING IRON & STEEL CO LTD
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Problems solved by technology

[0004] In order to solve the thickness accuracy control problem of narrow thickness tolerance 5Ni steel produced by a single-stand steckel rolling mill, the present invention provides a blank material shape design, plan layout, heating and rolling control method for the production of 5Ni steel plates with narrow thickness tolerance requirements

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  • Method for producing narrow-thickness-tolerance X12Ni5 steel through single-rack steckel mill

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the examples, but the protection scope of the present invention is not limited to the following examples.

[0026] This embodiment further explains the X12Ni5 steel with a thickness of 6 mm and a narrow thickness tolerance requirement. The mass percentage composition of X12Ni5 billet is: C<0.1%, Si0.1%~0.5%, Mn0.2%~1%, P<0.02%, S<0.02%, Ni4.5%~5.5%, Cr<0.2 %, Mo<0.15%, Cu<0.5%, V<0.1%, and the rest are Fe and unavoidable impurities.

[0027] (1) See Table 1 for specific material design;

[0028] Table 1 Material design data

[0029] Example number rolled steel Blank size Rolling length 1 X12Ni5 150×2600×8402mm 210m 2 X12Ni5 150×2850×8243mm 206m

[0030] (2) Planning arrangement: two rolled pieces will be produced after 550 tons in the middle and early stage of the work roll period, and the production will be controlled within 1000 tons in the middle and earl...

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Abstract

The invention discloses a method for producing narrow-thickness-tolerance X12Ni5 steel through a single-rack steckel mill. The method is characterized in that blank shape design, plan arrangement, heating and rolling processes for steel plate production of the single-rack steckel mill are optimized. By controlling the aspects of steel plate blank shape design, heating furnace heating temperature,rolling speed in a rolling process, rolling rhythm, AGC (automatic gauge control) amplitude limiting and the like, the stable production of + / -0.2 mm narrow-thickness-tolerance steel plates by the single-rack steckel mill is realized, the yield of + / -0.2 mm narrow-thickness-tolerance 5Ni steel plates of the single-rack steckel mill is improved, batch unqualified product rejudgment caused by the thickness overrun problem of a narrow-thickness-tolerance 5Ni steel plate order of the single-rack steckel mill is reduced, and the economic benefits and the market competitiveness of enterprises are improved.

Description

technical field [0001] The invention relates to a method for rolling a steel plate with narrow thickness tolerance, in particular to a method for producing X12Ni5 with narrow thickness tolerance, and belongs to the technical field of steel rolling technology. Background technique [0002] Nickel-series steel has super strong low-temperature mechanical properties, and has been widely used in the construction of low-temperature pressure vessels in recent years. Among them, 5Ni steel is an important variety of nickel-series steel. Because of its ultra-high low-temperature impact performance, it is currently widely used It is used in the manufacture of transportation and storage tank devices such as liquefied ethylene. In order to reduce transportation and storage costs, the design capacity of cryogenic liquefied gas storage and transportation devices is gradually increasing. Considering that the storage devices have to face some harsh environments during transportation, the sta...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B3/02B21B37/18B21B37/74B21B37/46
CPCB21B1/38B21B3/02B21B37/18B21B37/74B21B37/46B21B2001/386
Inventor 宋思宇李睿鑫潘玉柱魏林涛苏闯武向阳
Owner NANJING IRON & STEEL CO LTD
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