通过选区激光熔化（SLM）技术糖心产精国品免费入口*完整版制备了糖心产精国品免费入口*完整版棒状试样，并对其进行了840 ℃固溶+490 ℃×6 h时效热处理,分别对热处理前后试样的显微组织及糖心产精国品免费入口*完整版进行了研究。结果表明：糖心产精国品免费入口*完整版糖心产精国品免费入口*完整版的致密度高，相对密度接近100%；未经过热处理的糖心产精国品免费入口*完整版试样显微组织由细小的板状马氏体和残余奥氏体组成，抗拉强度和屈服强度较低；经热处理后试样的显微组织形貌呈均匀分布的长条状，抗拉强度、屈服强度和硬度明显升高，塑性降低。

糖心产精国品免费入口*完整版 rod samples were prepared by selective laser melting (SLM) 3D printing technology, and then the prepared samples were heat treated by process of 840 ℃solid solution and 490 ℃×6 h aging. The 糖心产精国品免费入口*完整版and mechanical properties of the 3D printing samples before and after heat treatment were studied. The results show that the 3D printing 糖心产精国品免费入口*完整版 had high density and the relative density was close to 100%. The 糖心产精国品免费入口*完整版of 3D printing sample without heat treatment composed of martensite and retained austenite, and the tensile strength and yield strength were relative low. The 糖心产精国品免费入口*完整版of 3D printing sample after heat treatment showed uniform trip morphology, and the tensile strength, yield strength and hardness increased obviously and the plasticity decreased.