Stainless steel wire is a kind of nickel-containing austenitic stainless steel --- nickel titanium wire rope

304 stainless steel wire is a nickel-containing austenitic stainless steel, which belongs to the Fe-Cr-Ni series alloy and is the main representative trademark of austenitic stainless steel. Because of the insufficient cost advantage of 304 stainless steel, the profitability of shopping malls is weak. In order to reduce costs and increase profitability, the company now chooses high-sulfur phosphorus pig iron as the training material of 304 stainless steel because of its relatively low cost, which is called "cheap nickel resources." ". With the large-scale use of cheap nickel resources, under the existing material conditions, the original process technology is no longer able to meet the user’s requirements for product quality. Therefore, it is necessary to study the process technology under the existing material conditions to meet the low requirements. Two-tier requirements for cost and high quality.

In the production of 304 cold-rolled stainless steel plates, linear defects often appear on the surface of the strip, which are called linear scales, or "line scales" for short. The shortcomings of line scales are mainly distributed in the range of unequal width on the two sides of the interval, and can only be observed after the cold-rolled sheet is pickled. Refer to the relevant effective methods used in the domestic stainless steel production practice, combined with the company's practical research results, summarized and analyzed the causes of the line scale defects, and adopted the corresponding control methods, which has a certain learning significance for reducing the defects of stainless steel surface quality.

Introduction to the disadvantages of 304 stainless steel wire scale

The production process of Baosteel Stainless Steel's steel plant using two-step training for 304 stainless steel is: electric furnace → AOD → LF → continuous casting → slab grinding. The main processes that cause line scale defects are AOD, LF and continuous casting.

The shortcomings of 304 stainless steel wire scales are detected in the cold-rolling APC unit. They are small in shape and difficult to observe with the naked eye. The length is about 20~80mm and the width is 0.5~1.0mm. Such shortcomings can be found on the upper and lower surfaces of the steel coils, with intermittent and irregular distribution characteristics.