氧化物弥散强化镍基高温合金制备与性能研究  

Preparation and Properties of Oxide Dispersion Strengthened Nickel-based Superalloys

作　　者：刘恩宇 马庆爽 白静 宫明龙 李会军 高秋志 LIU Enyu;MA Qingshuang;BAI Jing;GONG Minglong;LI Huijun;GAO Qiuzhi(School of Resources and Materials,Northeastern University at Qinhuangdao,Hebei Qinhuangdao 066004,China;School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;School of Mechanical,Materials and Mechatronic Engineering,University of Wollongong,Wollongong NSW 2522,Australia)

机构地区：[1]东北大学秦皇岛分校资源与材料学院,河北秦皇岛066004 [2]东北大学材料科学与工程学院,沈阳110819 [3]伍伦贡大学工程与信息科学学部,澳大利亚伍伦贡NSW2522

出　　处：《精密成形工程》2024年第10期50-60,共11页Journal of Netshape Forming Engineering

基　　金：国家自然科学基金(52171107,52201203);驻冀高校与石家庄市产学研合作项目(241791237A)。

摘　　要：目的以第三代镍基高温合金粉末为基础,制备氧化物弥散强化(Oxide Dispersion Strengthened,ODS)合金,探讨不同球磨时间与过程控制剂(Process Control Agent,PCA)添加量对机械合金化(Mechanically Alloying,MA)后粉末形貌与尺寸的影响,以及放电等离子烧结(Spark Plasma Sintering,SPS)温度对合金压缩性能和硬度的影响。方法利用扫描电子显微镜(Scanning Electron Microscope,SEM)表征机械合金化后粉末形貌,并统计粉末平均尺寸与晶粒尺寸,结合MHV-50Z/V2.0型数显维氏硬度计与AGS-X-100 kN电子万能试验机等方法对力学性能进行分析。结果PCA的加入能够有效细化粉末,但随着PCA添加量的增加,MA粉末逐渐由球状变为层片状。随着球磨时间的延长,部分粉末逐渐由球状变为扁平球状。另外,粉末的平均尺寸和晶粒尺寸均随球磨时间的延长而先减小后趋于稳定。SPS烧结温度为1050℃的合金性能最优,其极限压缩强度达到1735.61 MPa,维氏硬度高达488.94HV。结论最佳的制备工艺组合为球磨时间36 h,PCA添加量(质量分数)10%,SPS烧结温度1050℃,在此工艺参数组合下可制备出性能较优异的ODS镍基高温合金。The work aims to prepare oxide dispersion strengthened(ODS)alloys based on third-generation nickel-based su-peralloy powders and investigate the effects of different ball milling time and process control agent(PCA)amount on the mor-phology and structure of mechanically alloying(MA)powders,and the impact of spark plasma sintering(SPS)temperature on the hardness and compressive properties of the alloy.The morphology of MA powders was characterized with a scanning elec-tron microscope(SEM).The average particle size and grain size of the powders were measured.Mechanical properties were analyzed with an MHV-50Z/V2.0 digital Vickers hardness tester and an AGS-X-100 kN universal testing machine.The addition of PCA effectively refined the powders.However,with the increase PCA amount,the MA powders gradually transformed from spherical to flaky.As the ball milling time increased,some powders changed from spherical to flattened spheres.Additionally,the average particle size and grain size of the powders first decreased and then stabilized with the increase of the ball milling time.The alloy sintered at an SPS temperature of 1050 exhibited the best performance,with a ultimate compressive strength℃of 1735.61 MPa and a Vickers hardness of 488.94HV.The optimal preparation process parameters are found to be a ball milling time of 36 h,a PCA amount of 10wt.%,and an SPS sintering temperature of 1050.ODS nickel℃-based superalloys with supe-rior performance can be produced under this parameter combination.

关 键 词：镍基高温合金 氧化物弥散强化 机械合金化 放电等离子烧结 压缩性能 

分 类 号：TG132.32[一般工业技术—材料科学与工程]