17-4PH不锈钢材料的金属熔丝成形及其制品力学性能研究  

Study on Forming and Mechanics Properties of 17-4PH Stainless Steel Parts Fabricated by MFFF Technique

作　　者：姜世杰[1,2] 许子沼 李曙光 王菲 黄绪震[3] JIANG Shijie;XU Zizhao;LI Shuguang;WANG Fei;HUANG Xuzhen(School of Mechanical Engineering&Automation,Northeastern University,Shenyang,110819;Key Laboratory of Dynamics Reliability of Mechanical Equipment,Shenyang,110819;Beijing Hainachuan Automotive Parts Co.,Ltd.,Beijing,100021)

机构地区：[1]东北大学机械工程与自动化学院,沈阳110819 [2]辽宁省机械装备动力学可靠性重点实验室,沈阳110819 [3]北京海纳川汽车部件股份有限公司,北京100021

出　　处：《中国机械工程》2025年第3期593-603,共11页China Mechanical Engineering

基　　金：国家自然科学基金(51705068);中央高校基本科研业务费专项资金(N2303019)。

摘　　要：开发了三种17-4PH不锈钢/聚合物复合丝材,分别为聚乳酸(PLA)单组分、PLA/苯乙烯(SEBS)两组分以及PLA/高密度聚乙烯(HDPE)/乙烯-醋酸乙烯酯(EVA)三组分黏合剂丝材。利用普通的桌面级熔丝成形设备成形生坯样件,并使用箱式烧结炉研究了一步式热脱脂/烧结的可行性,探究三种黏合剂系统复合丝材的可成形性。以Ultrafuse 17-4PH复合丝材为原材料,通过生坯成形—脱脂—烧结工艺过程制备了金属熔丝成形烧结样件,并完成了密度、收缩率及静态力学性能等方面的研究。结果表明,一步式热脱脂/烧结工艺易使样件出现氧化、不收缩等缺陷问题,而采用两步式脱脂(即催化脱脂和热脱脂)再进行烧结的样件,成形效果良好。Ultrafuse 17-4PH烧结件的平均密度为7.2 g/cm^(3),X、Y、Z方向的收缩率分别为15%、18%、20%,最大拉伸强度可达600 MPa,最大弯曲强度约1200 MPa,硬度约为232 HV。Three types of self-made 17-4PH metal/polymer composite filaments were developed,which were polylactic acid(PLA)single-component,PLA/styrene(SEBS)bi-component and PLA/high-density polyethylene(HDPE)/ethylene vinyl acetate(EVA)three-component composite filament.The ordinary fused filament fabrication(FFF)machine was then used to build green parts,and the feasibility of one-step thermal debinding/sintering was studied using a box sintering furnace.The formability of the self-made composite filaments was further explored.Finally,MFFF sintered parts were formed with Ultrafuse 17-4PH composite filament through the shaping-debinding-sintering(SDS)processes.The density,shrinkage and static mechanics properties were studied.Results indicate that the one-step thermal debinding/sintering process is prone to generate defects such as oxidation and non-shrinkage in the samples,while the samples processed with two-step debinding(i.e.catalytic debinding and thermal debinding)and then sintering have a good forming quality.The average density of Ultrafuse 17-4PH sintered parts is as 7.2 g/cm^(3),and the shrinkage in X,Y and Z direction are as 15%,18%and 20%separately.The maximum tensile strength and bending strength may reach 600 MPa and 1200 MPa,respectively.The hardness is about 230 HV.

关 键 词：金属熔丝成形(MFFF) 增材制造 生坯成形 脱脂 烧结 力学性能 

分 类 号：TH164[机械工程—机械制造及自动化]