摘要
18Ni300作为一种高强度钢材,塑性较低是其性能短板。本研究采用激光选区熔化技术(Selective Laser Melting,SLM)制备了Mo/18Ni300金属基复合材料,并探讨了球形金属Mo颗粒作为增强体对SLM-18Ni300马氏体不锈钢的微观组织和力学性能的影响。在激光功率为380 W、扫描速度为560 mm/s的最优工艺参数下,Mo/18Ni300复合材料具有最佳的综合性能,其致密度为99.81%。试样中Mo颗粒以球形形态均匀分布且与基体有良好的冶金界面结合,同时部分Mo颗粒以元素的形式扩散到基体中。随着Mo元素含量的增加,基体中奥氏体的含量呈现上升趋势。分别加入2、6 wt.%Mo颗粒的SLM打印态Mo/18Ni300试样的拉伸强度呈现下降趋势,但其塑性和耐磨性均得到了大幅提升,强塑积由17.66 GPa%上升至21.50 GPa%,提升了21.74%。研究显示了以金属Mo颗粒调节18Ni300材料强塑比的可行性,以及利用难熔金属颗粒在SLM法制备金属基复合材料方面的潜力。
18Ni300,as a high-strength steel has a disadvantage of low plasticity.In this study,Mo/18Ni300 metal matrix composites were prepared by Selective lasermelting(SLM),and the effect of spherical metal Mo particles as reinforcement on the microstructure and mechanical properties of SLM-18Ni300 martensitic stainless steel was investigated.Under the optimal process parameters:laser power of 380W and scanning speed of 560 mm/s,Mo/18Ni300 composite material has the best comprehensive performance,with its density is 99.81%.The Mo particles in the sample are uniformly distributed in spherical shape and have a good metallurgical interface with the matrix.Meanwhile,some Mo particles are diffused into the matrix in the form of elements.With the increase of Mo content,the austenite content in the matrix showed an increasing trend.The tensile strength of SLM printed Mo/18Ni300 with 2 wt.%and 6 wt.%Mo particles decreased,but its plasticity and wear resistance were greatly improved,and the strong plastic volume increased from 17.66 GPa%to 21.50 GPa%,showing an increase of 21.74%.This study shows the feasibility of adjusting the strength-to-plastic ratio of 18Ni300 materials with metal Mo particles,and the potential of using refractory metal particles in the preparation of metal matrix composites by SLM method.
作者
张振猛
张昊
何波
吴锡辉
朱协彬
陈志浩
ZHANG Zhenmeng;ZHANG Hao;HE Bo;WU Xihui;ZHU Xiebin;CHEN Zhihao(School of Material Science and Engineering,Anhui Polytechnic University,Wuhu 241000,China;Anhui Longyuan Forming Technology Co.,Ltd.,Technical Department,Wuhu 241000,China;Anhui Provincial Key Laboratory of High-performance Non-ferrous Metals Materials,Anhui Polytechnic University,Wuhu 241000,China)
出处
《安徽工程大学学报》
2025年第3期28-36,共9页
Journal of Anhui Polytechnic University
基金
安徽省重点研发计划基金资助项目(1804A09020008)
安徽工程大学协同创新专项基金资助项目(2021fccyxtb1)
国家级大学生创新创业训练计划基金资助项目(202110363021)。
