高温回火对低碳中锰钢微观组织和力学性能的影响

展之德, 刘琪琪, 董敬文, 祁震, 罗小兵, 柴锋, 师仲然

Effect of Tempering Temperatures on Microstructure and Mechanical Property of a Test Low-carbon Medium-manganese Steel

ZHAN Zhide, LIU Qiqi, DONG Jingwen, QI Zhen, LUO Xiaobing, CHAI Feng, SHI Zhongran

表2 4Mn钢的低温冲击功和剪切断面率

Table 2 Low temperature impact energy and shear fracture ratio of 4Mn steel

Sample	-40 ^oC		-60 ^oC		-84 ^oC
Sample	KV₂ / J	SFA / %	KV₂ / J	SFA / %	KV₂ / J	SFA / %
600 ^oC	158 ± 8.6	66 ± 1.5	125 ± 36.4	53 ± 8.7	69 ± 12.7	34 ± 3.8
640 ^oC	91 ± 4.4	42 ± 1.5	57 ± 2.6	20 ± 1.5	45 ± 0.6	17 ± 2.3
670 ^oC	48 ± 1.5	16 ± 1.5	41 ± 1.2	14 ± 1.2	34 ± 3.2	12 ± 2.6