he hot-rolled stainless steel plate processing is a systematic industrial process designed to convert steel slabs into steel plates of desired dimensions through high-temperature rolling, achieving the desired mechanical properties and microstructure. Step 1: Steelmaking and Continuous Casting This is the foundation of all processes and determines the "genesis" of stainless steel plate.
The stainless steel welded pipe processing process is a continuous, precise, and modern industrial process. Its core is to transform stainless steel strip/sheet into pipe through forming and welding, and then further process it to achieve the required performance.
1.1 Ferritic Stainless Steel This stainless steel has a matrix composed primarily of ferrite (α phase) with a body-centered cubic crystal structure. It is magnetic and generally cannot be hardened by heat treatment, but can be slightly strengthened by cold working. It contains 11-30% Cr, and may contain small amounts of Mo, Nb, and Ti. It is essentially Ni-free. It offers high strength and excellent resistance to chloride stress corrosion, pitting, and crevice corrosion, but is sensitive to intergranular corrosion and has poor low-temperature toughness. Key grades include 06Cr13Al, 10Cr17, 10Cr17Mo, 008Cr27Mo, and 008Cr30Mo2.
Structural steels include 4130, 4140, 4340, 300M, and Hy-Tuf, primarily used in front and rear landing gear. Stainless steels include 301, 302, 303, 321, 17-4PH, and 17-7PH, primarily used in engine nacelles, pylons, and thrust reversers, with smaller amounts also found in various parts of the fuselage.
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