17-4PH不锈钢材料的金属熔丝成形及其制品力学性能研究

doi:10.3969/j.issn.1004-132X.2025.03.023

摘要/Abstract

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/cm3，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。

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

Abstract: 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/cm3, 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.

Key words: metal fused filament fabrication（MFFF）, additive manufacturing, green part shaping, debinding, sintering, mechanics property

中图分类号:

TH164

姜世杰1, 2, 许子沼1, 李曙光1, 王菲1, 黄绪震3. 17-4PH不锈钢材料的金属熔丝成形及其制品力学性能研究[J]. 中国机械工程, 2025, 36(03): 593-603.

JIANG Shijie1, 2, XU Zizhao1, LI Shuguang1, WANG Fei1, HUANG Xuzhen3. Study on Forming and Mechanics Properties of 17-4PH Stainless Steel Parts Fabricated by MFFF Technique[J]. China Mechanical Engineering, 2025, 36(03): 593-603.

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链接本文: https://www.cmemo.org.cn/CN/10.3969/j.issn.1004-132X.2025.03.023

https://www.cmemo.org.cn/CN/Y2025/V36/I03/593

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