3DAP研究高碳高合金钢深冷处理过程的C偏聚行为

谢尘, 吴晓春, 闵娜, 沈贇靓

CARBON SEGREGATION BEHAVIOR OF HIGH-CARBON HIGH-ALLOY STEEL DURING DEEP CRYOGENIC TREATMENT USING 3DAP

XIE Chen, WU Xiaochun, MIN Na, SHEN Yunliang

表 1 SDC99钢的热处理工艺和硬度及残余奥氏体含量

Table 1 Heat treatment processes of SDC99 steel and hardness, volume fraction of retained austenite

Process Heat treatment Hardness / HRC Vγ / % Quenching Quenching, 1030 ℃, 30 min 62 21.1 DCT Quenching, 1030 ℃, 30 min+ 64 7.4 DCT, -196 ℃, 8 h Tempering Quenching, 1030 ℃, 30 min+ 63 5.4 DCT, -196 ℃, 8 h+ tempering, 210 ℃, 2 h