Lubricating method for rolling of stainless steel products on tandem cold rolling mill

Abstract

The invention provides a lubricating method for rolling of stainless steel products on a tandem cold rolling mill, which is a method for rolling stainless steel plates with low surface defects on the tandem cold rolling mill comprising machine frames with the number of N. The method is characterized in that emulsified liquid is used for rolling, lubricating and cooling on the second machine frame to the N-1th machine frame of a tandem cold rolling mill group, and pure rolling oil is used for lubricating the surface of band steel before the band steel enters the rolling mill and / or inlet roll gap areas between rollers of the machine frames and the band steel on the first and Nth machine frames of the tandem cold rolling mill. At the same time, cooling liquid is used for cooling the rollers and the band steel on the first and Nth machine frames, and at this time, the cooling liquid does not come into contact with the pure rolling oil on the machine frames, i.e., the lubrication by the pure rolling oil is not interfered. The number N of the machine frames of the tandem cold rolling mill is 4 to 6, and the number of the rollers of each machine frame is 4 to 6. The lubricating method for rolling of stainless steel products on the tandem cold rolling mill, provided by the invention, is a novel method for producing the stainless steel products with low surface defects on the tandem cold rolling mill. Through the adoption of the rolling method and a system thereof, the requirements for high-quality surfaces can be met at low costs.

Description

Technical field [0001] The present invention relates to the field of metallurgical cold rolling production, in particular, the present invention relates to a rolling lubrication method for cold tandem rolling mills of stainless steel products. Background technique [0002] In the field of metallurgical cold rolling production, stainless steel materials are usually produced by single-stand reversible multi-roll mills due to their higher strength and rapid work hardening tendency. The so-called multi-roll mill refers to the number of rolls in a single stand. More than one rolling mill, such as figure 1 That kind of 12-high mill, 18-high Z-high mill and 20-high Sendzimir mill. During production, stainless steel materials need to reciprocate multiple passes on a single-stand rolling mill to produce qualified finished products, so the cost is relatively high. [0003] Stainless steel products produced in traditional multi-roll mills are usually rolled using small roll diameter, low rou...

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Problems solved by technology

[0011] CN200580040022.X (rolling oil supply method in cold rolling, Nippon Steel Co., Ltd., Arcelor France) proposed a low-cost and effective suppression of high-speed production "hot scratch" surface defects in cold tandem rolling mills The rolling lubrication method that occurs, the essential core content of its invention is to supply two types of rolling oil, one is low-cost common rolling oil, and the other is high-cost rolling oil, and the production is aimed at the production of different steel types , spraying different rolling oils and mixed rolling oils containing high and low cost in different proportions, the rolling oil provided by this method can save costs by spraying high-cost synthetic rolling oil as little as possible during production, But in the actual production process, since the emulsion is recycled and used, the recycling and reuse operation convenience of the mixture of the two rolling oils in the long-term production is an easy problem to solve

[0012] It can be seen that in the production of most of the above-mentioned patents in the tandem cold rolling mill, in order to solve the surface quality of rolled stainless steel products, it is necessary to use special rolling oil with a certain chemical structure and good lubricating performance, or use special rolls and rolling procedures, resulting in high production costs

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