Finite element numerical simulation of heat treatment temperature field of 1Cr15Ni4Mo2CuN stainless steel for screw

doi:10.13251/j.issn.0254-6051.2023.04.038

Abstract

Abstract: Based on the ANSYS finite element platform and combined with the temperature sensitivity of thermophysical parameters and the current heat treatment process, the temperature field variation of the 1Cr15Ni4Mo2CuN steel screw specimen with different sizes during quenching and cryogenic treatment was simulated, and the retained austenite content of the specimen under different cryogenic time was analyzed by means of microstructure observation, XRD and hardness test. The results show that the temperature uniformity time during heating at 1070 ℃ of the φ40, φ45, φ50 mm specimen is 1100, 1294, 1446 s, respectively; the whole temperature of the φ40 mm specimen drops below the Mf temperature when cryogenic at -196 ℃ for 79 s, meanwhile, the retained austenite of the workpiece has been greatly transformed into martensite, which leads to the siqnificant inorease of hardness. With the extension of cryogenic time, the content of retained austenite decreases, but after cryogenic for 1800 s, the content of retained austenite does not change significantly.

Key words: numerical simulation, temperature field, temperature uniformity time, screw, cryogenic treatment

CLC Number:

TG156

Wang Zhonglin, Li Quan, Gong Zhihua, Bao Hansheng, Yong Xi. Finite element numerical simulation of heat treatment temperature field of 1Cr15Ni4Mo2CuN stainless steel for screw[J]. Heat Treatment of Metals, 2023, 48(4): 245-252.

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