成分波动对AMS 6308钢力学性能的影响

Effect of chemical composition fluctuation on mechanical properties of steel AMS 6308

采用力学性能测试以及金相分析、TEM等微观结构分析,研究了传统热处理工艺(915℃×0.5 h油冷+(-80)℃×1 h+205℃×2 h空冷)下成分波动对AMS 6308钢力学性能和微观组织的影响。结果表明,1号试验钢(wt%:0.1C,1.0Cr,1.97Ni,3.25Mo,2.0Cu,0.08V,0.83Si,余量Fe)的塑性和韧性最优,且强度和硬度也保持在较高的水平,其综合力学性能最佳(Rm=1135 MPa,Rp0.2=880 MPa,A=16%,Z=63%,KV2=125 J,35 HRC)。

The effect of traditional heat treatment on the mechanical properties and microstructure of the steel AMS 6308 with chemical composition fluctuation was investigated by means of optical micrography, TEM and mechanical property tests. Under the traditional heat treatment process, such as oil quenching at 915 ℃ for 0.5 h ＋ cold treatment at - 80 ℃ for 1 h ＋ tempered at 205 ℃for 2 h. The results show that No. l steel （wt%： 0.1C, 1.0Cr, 2.0Ni, 3.25Mo, 2.0Cu, 0.08V, 0.9Si, 0.4Mn, Fe balance） has the best plasticity and toughness, and the strength and hardness are at a higher level, showing excellent integrated mechanical properties （Rm = 1135 MPa, R0o.2 = 880 MPa, A =16%, Z=63% , KV： =125 J, 35 HRC）.