论文部分内容阅读
通过对高强度马氏体沉淀硬化不锈钢采用Charpy低温冲击、低温拉伸、常温拉伸等试验方法,研究了该钢的低温力学性能,并通过金相检验(OM)、X射线能量色散谱分析(EDS)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)等检验手段进行了显微组织、断口形貌、背散射成像、电子衍射谱、面扫描等分析。结果表明,试验钢的力学性能满足了设计要求,其显微组织均匀,逆变奥氏体弥散均匀分布,析出相弥散细小,均提高了钢的低温韧性。
The low-temperature mechanical properties of the high-strength martensitic precipitation-hardened stainless steel were studied by Charpy low-temperature impact, low-temperature tensile test and normal-temperature tensile test. The microstructures of the steel were characterized by metallographic examination (OM), energy dispersive X-ray spectrometry (EDS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to analyze the microstructure, fracture morphology, backscatter imaging, electron diffraction and surface scanning. The results show that the mechanical properties of the test steel meet the design requirements. The microstructure of the test steel is uniform, the austenite is dispersed uniformly and the precipitated phase is small and dispersed, which improves the low temperature toughness of the steel.