Manufacture method of cold-rolled electrolytic tin substrate

Abstract

The invention discloses a manufacture method of a cold-rolled electrolytic tin substrate. The manufacture method comprises the steps of: (1) processing the produced molten iron by converter smelting, vacuum treatment, continuous casting and hot rolling after desulfuration to obtain a cold-rolled material; (2) pickling by a shallow-trench turbulent push-pull hydrochloric acid pickling set; (3) carrying out cold rolling for the first time by using a six-roller HC reversing mill, and rolling to a semi-product with a thickness of 0.5 to 0.6 mm after passing through 4 to 7 rolling passes; (4) cleaning by an electrolytic degreasing set; (5) carrying out annealing for the first time in a full-hydrogen shine-cover annealing furnace; (6) carrying out cold rolling for the second time by using the six-roller HC reversing mill; (7) carrying out annealing for the second time in the full-hydrogen shine-cover annealing furnace; (8) leveling by using a four-roller leveling machine, wherein the rolling force is controlled between 3000 to 4500kN; and (9) trimming by a re-reeling set, oiling, packaging and storing in a warehouse. The manufacture method disclosed by the invention has the advantages of stable production and low production cost, and can meet the requirement for high-quality electrolytic thin substrate in the food package industry.

Description

Technical field [0001] The invention belongs to a method for producing a cold-rolled tin electroplating substrate, in particular to a method for producing a high-precision ultra-thin cold-rolled tin electroplating substrate for the food industry. Background technique [0002] Tin plate is a product made by plating a layer of tin on the surface of extremely thin steel plate. It belongs to the coated steel plate in metallurgical products. The tin plate produced by the electroplating process is called electroplating tin plate. Strength and formability, tin's corrosion resistance and solderability are integrated. It has the characteristics of corrosion resistance, non-toxicity, high strength, good ductility and beautiful appearance. It is widely used in food, beverage, chemical, paint and other products. Packaging and stamping products and other fields. [0003] With the growing prosperity of the food packaging industry, the demand for high-precision and ultra-thin tin electroplating ...

AI Technical Summary

Problems solved by technology

The tin-plated substrate produced by the continuous annealing process, due to the short annealing holding time, the crystal grains are difficult to fully grow, so it is difficult to obtain a tin-plated substrate suitable for food packaging stamping. During annealing, it is easy to cause ladle bending and broken belt accidents, resulting in high production costs

Moreover, the construction of continuous rolling line and continuous annealing line requires large investment and covers a large area, which will consume a lot of manpower, material resources and financial resources

[0005] Since the food industry uses high-precision ultra-thin cold-rolled tin-plated substrates to have strict requirements on surface quality (roughness), shape quality, physical properties (hardness, stamping performance), and thickness accuracy, the high-precision ultra-thin cold-rolled tin-plated In the substrate production process, it is difficult to control the surface quality (roughness), plate shape quality, thickness accuracy, hardness and stamping performance. The surface quality is easy to cause inclusions, peeling, black spots, rolling lines, pitting, scratches, Defects such as oil stains and chromatic aberrations are likely to cause defects such as edge waves, middle waves, and rib waves in terms of plate shape. In terms of product thickness accuracy, it is easy to cause defects such as uneven thickness, ultra-thin, and ultra-thickness. In terms of physical properties, it is easy to cause hardness exceeding the standard value and Instability, stamping cracking defects, causing customers to be unable to use