Direct annealing is new process routes for 430 ferritic stainless steel production
In ferritic stainless steel in order to use and yields 430 ferritic stainless steel up , the main advantage in some countries after the austenitic stainless steel 304.430 ferritic stainless steel is inexpensive, low coefficient of thermal expansion , resistance to chloride stress corrosion better than 300 series stainless steel. Especially after adding trace elements , niobium , titanium , copper, aluminum , etc. , ferritic stainless steel deep drawing properties , weldability , corrosion resistance, antimicrobial resistance and high temperature strength have been improved to varying degrees , so that ferritic stainless steel with a broad application base .
430 ferritic stainless steel cold-rolled strip steel is used extensively for kitchen equipment , utensils, appliances and other deep-drawing purposes. Therefore, this type of ferritic stainless cold- forming properties is very important. In addition to the effects of cold- forming properties of the chemical composition , production process also has an important impact on cold forming properties.
In ferritic stainless steel production process, in order to meet the requirements of the final cold rolling , a critical and costly step of annealing the hot rolled after that . The traditional process route is to complete the hot strip annealing furnace in the hood , the entire length of the annealing cycle , the energy consumption is very high.
In order to reduce energy consumption , reduce production costs and increase competitiveness of their products , while also meet the final cold rolled strip requirements of the German company ThyssenKrupp AST according to their mass production of ferritic stainless steel , of which about 20 430 % is the characteristics of ferritic stainless steel , after years of research, testing, development of a batch annealing process compared with low energy consumption, short time-consuming , cost- competitive and can fully meet the new requirements of the final cold rolling process that direct annealing process. The basic principle is to use the waste heat of the process after hot rolling , annealing treatment immediately.
This paper describes the advantages of a direct hand in the annealing process equipment and the process ( hot rolled coil heat loss , low power consumption , short cycle, reduce production costs by about 60% , rolled products fully meet the performance requirements .
What is a super stainless steel? Nickel-based alloys?
Super stainless steel, nickel-based alloy is a special stainless steel, the first in the chemical composition different from ordinary stainless steel 304, refers to a high-alloy high nickel, high chromium, high molybdenum stainless steel. Second, the high temperature or corrosion-resistant properties, compared with 304, or with a more excellent high temperature corrosion resistance, is 304 irreplaceable. In addition, from the classification of stainless steel, special steel microstructure is a stable austenitic microstructure.
Because of this special high-alloy stainless steel is a material, it is in the manufacturing process is quite complex and usually people can only rely on traditional techniques to produce this special stainless steel, such as perfusion, forging, rolling, and so on.