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Cold roller and cold rolling method

A cold rolling mill and stand technology, which is applied in the field of tandem cold rolling mills, can solve the problems of improved rollability, no help, and increased heat loss at the edge of the steel plate, and can prevent the rise of the main unit of rolling oil, The effect of reducing heat loss and manufacturing cost

Active Publication Date: 2019-10-01
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, simply increasing the injection amount of the low-concentration coolant only increases the heat loss caused by the coolant, but does not contribute to the improvement of the rollability of the edge portion of the steel sheet.

Method used

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  • Cold roller and cold rolling method
  • Cold roller and cold rolling method
  • Cold roller and cold rolling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] Such as image 3 As shown, an edge heater of an induction heating method for heating the two edges of the steel plate is used at a position 5 m upstream of the first frame, and a high-concentration coolant sprayer is arranged between the edge heater and the first frame. In a completely continuous tandem cold rolling mill with a high-concentration coolant injection device, experiments were conducted to cold-roll hot-rolled steel sheets with a thickness of 2.0 to 3.0 mm containing 3.0% by mass or more of Si to a thickness of 0.3 to 0.5 mm. .

[0054] Here, since the above-mentioned tandem cold rolling mill is a circulating oil supply system, it is equipped with a low-concentration cooling liquid emulsified by mixing rolling oil containing esters as a main component in water at a concentration of 3% by mass. (Temperature: 50°C), the structure of the low-concentration coolant spraying device sprayed on the outer peripheral surface of the work roll of each stand and between...

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Abstract

The invention provides a cold roller and a cold rolling method. It is possible to roll hard-to-roll materials such as silicon steel sheets and stainless steel sheets without cracking the steel sheet edges or fracturing the steel sheet, even during slow rolling, by using a circulating-lubricant tandem cold roller which supplies coolant comprising a rolling oil and cooling water to each stand and continuously rolls a steel sheet, wherein edge heaters for heating both edges of the steel sheet to a temperature of at least 60 DEG C on the roll bite entry side of the steel sheet are provided on theupstream side of the first stand of the cold roller, and equipment for spraying the surfaces of both edges of the steel sheet with a coolant having a higher concentration than the coolant supplied tothe first stand is provided between the edge heater and the first stand.

Description

technical field [0001] The present invention relates to a cold rolling mill and a cold rolling method, and more specifically, to a tandem cold rolling mill suitable for rolling difficult-to-roll materials such as silicon steel plates and stainless steel plates, and a cold rolling method using the same . Background technique [0002] In the past, when cold-rolling steel strips (steel plates), the cold rolling mills used were of the tandem type of multiple rolling mills arranged in series or the reverse type composed of a single frame. The batch method of unit rolling steel strip, or the continuous method of welding the steel strip on the input side of the rolling equipment and rolling the steel strip continuously, generally set the temperature of the steel plate to be rolled to about room temperature, even if it is high. Rolling is carried out at about 40°C. This is because, as a property of the steel plate, it is known that the higher the temperature, the lower the deforma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B3/02B21B45/02
CPCB21B3/02B21B45/004B21B45/0251C21D1/42B21B2261/20B21B2275/06C21D8/0236C21D9/46C21D2221/02C21D1/58C22C38/00C21D6/008C21D8/12Y02P10/25B21B45/0233B21B37/74B21B1/22B21B45/0248
Inventor 福岛达人
Owner JFE STEEL CORP
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