摘要
研究了S46500超高强度不锈钢在982℃固溶保温后,经水冷至室温、冰冷(0℃)和深冷(-73℃)三种不同的冷处理方式的试样,再经时效处理(510℃/4 h),对其组织和性能的影响。结果表明:经过-73℃深冷处理与冷却至室温的试样相比,拉伸强度和屈服强度分别提高292 MPa和295 MPa。塑性和韧性略有下降,延伸率从13%(室温)降低到10.5%(深冷)。冲击功从64 J(室温)降低到48 J(深冷)。随着冷处理温度的降低,逆转奥氏体含量逐步减少,室温与深冷相比,奥氏体含量从8.2%降低到6.6%。
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.
作者
徐锋
孙强
陆瑞
Xu Feng;Sun Qiang;Lu Rui(R&D Center,BAOWU Special Metallurgy Co.,Ltd.,Shanghai 200940,China)
出处
《特殊钢》
2023年第6期107-111,共5页
Special Steel
