Manufacturing method of austenitic stainless steel for non-magnetic color-difference-free beer barrel

Abstract

The invention provides a manufacturing method of austenitic stainless steel for a non-magnetic color-difference-free beer barrel. The manufacturing method comprises the following steps: continuously casting raw materials of the austenitic stainless steel into a steel billet through a smelting process; sequentially carrying out hot rolling, hot rolled steel coil annealing and pickling, defect grinding, cold rolling, cold rolling, annealing and pickling and finishing on the obtained steel billet; and sequentially performing surface color difference and material magnetism detection on the steel billet machined through the finishing process in the S2 to obtain the austenitic stainless steel suitable for producing the non-magnetic color-difference-free beer barrel. According to the manufacturing method of the austenitic stainless steel for the non-magnetic and color-difference-free beer barrel, stainless steel materials produced by the manufacturing method are used for nearly 3 million stainless steel beer barrels, draught beer barrels, wine barrels, beer fresh-keeping barrels, beer kettles and chemical barrels in numerous international famous brewery enterprises, the advanced technology of steel manufacturing in China is shown, the popularity of enterprises and products is improved, and about 30 million economic benefits are created for the enterprises.

Description

technical field [0001] The invention belongs to the technical field of austenitic stainless steel, and in particular relates to a method for manufacturing an austenitic stainless steel beer barrel without magnetism and color difference. Background technique [0002] Austenitic stainless steel is currently the most widely used chromium-nickel stainless steel, of which 304 steel is a typical austenitic stainless steel, which has good corrosion resistance, heat resistance, low temperature strength and mechanical properties. It has good processability and weldability, and is suitable for food processing, storage and transportation. It has been widely used in heat exchangers, bellows, household products (tableware, cabinets, indoor pipelines, water heaters, boilers, bathtubs), auto parts (windshield wipers, mufflers, molded products), medical appliances, building materials decoration, ship parts and other products use. Beer barrel products are mainly made of plastic, glass, sta...

AI Technical Summary

Problems solved by technology

The beer kegs produced by ordinary 304 stainless steel are metastable austenitic stainless steel at room temperature, and cold work hardening occurs in the process of stretching and stamping to manufacture beer kegs, and the metastable austenite structure transforms into a ferromagnetic one. Martensitic structure, beer keg products show demagnetization, which not only increases the risk of failure and cracking caused by cold hardening during use of beer keg products, affects the service life, but also affects the taste of beer due to the precipitation of iron elements

In addition, due to the surface color difference of raw materials and ribbon defects, the color difference and ribbon defects of beer keg products will still appear after stretching and stamping, which directly affects the effect of pickling and passivation after stretching and welding by beer keg manufacturers. work efficiency;

[0003] The surface color difference control and beer barrel magnetic index control proposed by the existing patents can no longer fully meet the current international beer barrel industry's demand for high-quality beer barrels. The austenitic stainless steel produced according to the existing technology has technical realization of magnetic indexes, There are gaps in implementation methods and detection

When stretching beer keg products, there are color differences and uneven color bands between batches. The technical control of color difference and color band defects is relatively simple, and technically cannot meet the current international high-quality requirements for this industry.

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