Mechanical properties of austenitic steels after low-temperature deformation and tempering

1. Deformation of unstable austenitic steels at negative temperatures is accompanied by formation of a large quantity of martensite (50–90%), which substantially increases the strength as compared with deformation at room temperature [3]. 2. Aging of strain martensite at 300–400° increases the ultimate strength and yield strength of steels Kh18N10T and Kh14G14N4TYu by 30–40 kg/mm2. 3. Additional alloying of unstable Cr−Ni steels with molybdenum, copper, and silicon increases the aging of strain martensite, making it possible to obtain an ultimate strength of 200–250 kg/mm2 with δ=4% after low-temperature deformation followed by aging.