17-4PH颗粒料金属3D打印烧结工艺参数对力学性能的影响规律  

Influence law of 3D printing sintering process parameters on mechanical properties of 17-4PH granular material metal

作　　者：蔡礼超 张鹏 CAI Lichao;ZHANG Peng(College of Automotive and Mechanical Engineering,Changsha University of science and technology,Changsha 410114,China)

机构地区：[1]长沙理工大学汽车与机械工程学院,湖南长沙410114

出　　处：《粉末冶金工业》2024年第5期74-82,共9页Powder Metallurgy Industry

基　　金：国家自然科学基金资助项目(51705036)

摘　　要：与基于激光和电子束的增材制造技术相比,3D打印和烧结结合的工艺成本更低,但对烧结阶段工艺参数的探索不够全面和深入。因此,实验采用基于螺杆的3D打印技术制备17-4PH不锈钢样品,探索烧结工艺参数(烧结温度、升温速率和保温时间)对17-4PH不锈钢性能的影响规律,包括孔隙率和拉伸性能的测量,研究烧结工艺参数对孔隙结构、显微组织和断口形貌的影响规律,并通过孔隙结构、显微组织和断口形貌的变化对烧结样品的力学性能的变化规律进行详细的阐述。结果表明,试样以4℃/min的升温速率升温到1 360℃保温1 h,其力学性能最佳,屈服强度为518 MPa,抗拉强度为693 MPa。Compared with laser and e-beam based additive manufacturing technologies,the combined 3D printing and sintering process is cheaper,but the exploration of the process parameters in the sintering stage is not comprehensive and in-depth enough.Therefore,the experiment uses screw-based 3D printing technology to prepare 17-4PH stainless steel samples,to explore the influence law of sintering process parameters(sintering temperature,heating rate and holding time)on the properties of 17-4PH stainless steel,including porosity and tensile property measurements,and to investigate the influence law of the sintering process parameters on the pore structure,microstructure and fracture morphology.The changes in the mechanical properties of the sintered samples were elaborated through the changes in the pore structure,microstructure and fracture morphology.The results show that the mechanical properties of the sintered samples are best when the sintered samples are heated up to 1360℃for 1 h at a rate of 4℃/min,with a yield strength of 518 MPa and a tensile strength of 693 MPa.

关 键 词：17-4PH不锈钢 高温烧结 力学性能 金属3D打印 脱脂 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TP391.73[金属学及工艺—金属材料]