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301 stainless steel adopts hot drawing method

Add Time:2021-05-04 Hits:3

Due to the different hardness of the two phases in 301 stainless steel at high temperature and the different softening mechanism during hot deformation, there are uneven stress and strain distributions in austenite and ferrite. During hot deformation, cracks nucleate and propagate at the phase boundary of 301 stainless steel. The thermoplasticity of 301 stainless steel is not only closely related to the steel grade, but also affected by the strain rate, deformation temperature, morphology of austenite phase and other factors. In recent years, thermoplasticity has been one of the research hotspots of 301 stainless steel workers in China.

The thermoplasticity of several typical 301 stainless steel was studied by hot stretching method in the deformation temperature range of 950 ~ 1200 . With the increase of deformation temperature, the tensile strength of 301 stainless steel decreases gradually. At the same deformation temperature, the increase of alloy content significantly improves the tensile strength of the steel. At the same time, with the increase of deformation temperature, the reduction of area of 301 stainless steel increases gradually, and maintains at a relatively high level between 1100 ~ 1200 . At the same deformation temperature, the reduction of area of 2507 is significantly lower than that of 2101 and 2205. Although the content of Cr and Mo in 2205 is higher than that of 2101, the content of Mn in 2101 is about 5%. Therefore, the reduction of area of 2101 and 2205 are almost the same. In general, for 301 stainless steel, it has good thermoplasticity between 1100 ~ 1200 . The research results lay the foundation for determining the reasonable hot deformation temperature range according to the hot deformation mode, steel grade and specification in the actual production process.

On this basis, through the optimization of smelting process, Chinese metallurgical enterprises effectively reduced the oxygen content in the steel to below 30ppm, combined with low sulfur, adding rare earth and boron elements and other means, which laid a good foundation for the hot working of 301 stainless steel.




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