Super Austenitic 904L Stainless Steel Tube

super austenitic 904L stainless steel tubes are designed for corrosive environments. By optimizing chemical composition, super Austenitic 904L stainless steel tube is a super austenitic stainless steel with low C content and high alloying. 904L super austenitic stainless steel tube blank was successfully developed by specific production process. In the process of research and development, A single slag refining process (CAO-Sio2-MGO-A l2O3) suitable for the quaternary slag system of very low carbon stainless steel was developed, which not only solved the problem of carbon recovery during smelting, but also can be deeply desulphurized. The single slag smelting operation can achieve the same desulfurization and deoxidation effect as double slag smelting. A scientific and reasonable process of adding trace elements such as rare earth element and boron element has been obtained to improve the processing properties of steel, and a suitable hot working technology has been developed.

Super austenitic 904L stainless steel pipe high molybdenum corrosion resistant super austenitic stainless steel, equivalent to the American standard ASTM N08904 in the original stainless steel chromium content 20% nickel content 25% on the basis of improving the molybdenum content to 4%~5%, and the addition of copper, further improve its pitting resistance and corrosion resistance, often used in strong corrosion environment, Conventional stainless steel life many times. Although the steel has excellent performance, the effect of rare earth on the thermoplasticity of multi-element super austenitic stainless steel tube was studied by means of high temperature impact method, thermal torsion method and wedge rolling method. The formation of rolling crack, the morphology of impact fracture and the segregation of alloy were observed by metallography and scanning electron microscope.

The results show that the impact energy at 9501200℃ can be increased by 20%, the critical pressure reduction rate at 9001200℃ increased by 15%, and the thermal torsion number at 9501200℃ increased by 2030%. The advantages and disadvantages of stainless steel thermoplastic is very important, to a large extent determines the qualified rate of stainless steel products and the use of products. Because super austenitic 904L stainless steel pipe contains more and higher alloying elements such as CrNiMoCu51, the high temperature deformation resistance of steel is large, the cast structure is generally coarse, and sometimes there is a small amount of ferrite, resulting in poor thermoplastic super austenitic 904L stainless steel pipe, hot processing is difficult.