Xu Feng,Sun Qiang,Lu Rui.Effect of Cold Treatment on Microstructure and Properties of S46500 Ultra High Strength Stainless Steel[J].Special Steel,2023,44(06):107-111.
Xu Feng,Sun Qiang,Lu Rui.Effect of Cold Treatment on Microstructure and Properties of S46500 Ultra High Strength Stainless Steel[J].Special Steel,2023,44(06):107-111. DOI: 10.20057/j.1003-8620.2023-00062.
Effect of Cold Treatment on Microstructure and Properties of S46500 Ultra High Strength Stainless Steel
Investigated the effects of three different methods of cold treatment (air cooling to room temperature, 0 ℃ ice water treatment , -73 ℃ cryogenic treatment) on the microstructure and properties of S46500 ultra high strength stainless steel after solid solution holding at 982 ℃ and aging treatment at 510 ℃/4 h . The results showed that: After -73 ℃ cryogenic cooling treatment, the tensile strength and yield strength were increased respectively by 292 MPa and 295 MPa, compared to the sample cooled to room temperature. Plasticity and toughness decreased slightly, elongation reduced from 13% (room temperature) to 10.5% (cryogenic temperature). The impact was reduced from 64 J (room temperature) to 48 J (cryogenic temperature) .With the decrease of cold treatment temperature, the reverse austenite content gradually decreased, and the austenite content decreased from 8.2% to 6.6% compared with that of cryogenic temperature at room temperature .
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