第3期陈金瀚，等：激光粉末床熔化W-21Re-C合金的成形与微观组织研究23Lasers，2021，48（15）：1502006.[35]CHENJH，ZHAOCC，LIKL，etal.EffectofTaCadditiononmicrostructureandmicrohardnessofadditivelymanufacturedtungsten[J].JournalofAlloysandCompounds，2022，897：162978.[36]MULLINSWW，SEKERKARF.Stabilityofaplanarinterfaceduringsolidificationofadilutebinaryalloy[J].JournalofAppliedPhysics，1964，35（2）：444–451.[37]LUOA，JACOBSONDL，SHINKS.Solutionsofteningmechanismofiridiumandrheniumintungstenatroomtemperature[J].InternationalJournalofRefractoryMetalsandHardMaterials，1991，10：107–114.[38]ECKLEYCC，KEMNITZRA，FASSIOCP，etal.Selectivelasermeltingoftungsten-rheniumalloys[J].JOM，2021，73（11）：3439–3450.FormabilityandMicrostructureinLaserPowderBedFusionofW-21Re-CAlloyCHENJinhan1,ZHAOCongcong2,LIUWei1（1.SchoolofMaterialsScienceandEngineering,TsinghuaUniversity,Beijing100084,China;2.JihuaLaboratory,Foshan528000,Guangdong,China）Abstract:Forareducedcracksinlaserpowderbedfusion(LPBF)fabricatedtungsten,theW-21Re-Calloywaspreparedbyrheniumandcarbonalloyingintungstenmatrix.Theformability,microstructureandmechanicalpropertiesofW-21Re-Calloywerestudied.TheresultsshowedthattheLPBFprocessparameterwindowofW-21Re-Calloywasnarrow,andtherewereacertainamountofholesandcracks.ThecrackswerereducedcomparedwithLPBFpuretungsten.TheW2Csubstructures,withhexagonalclose-packedstructure,wereformedintheLPBFedW-21Re-Calloy.Becauseoftherapidsolidification,thesubstructureswerepresentedasdendriteandcellularstructures.Rheniuminthealloywasmainlypresentedasformingsolidsolutioninthetungstenmatrix.Moreover,therewasalsoacertainamountofrheniumbetweenthedendritearmaswellasattheintracellularregionoftheW2Csubstructure.BecauseofthesolidsolutionofrheniumintungstenandtheformationofW2Csubstructures,themicrohardnessofLPBFedW-21Re-CalloywassignificantlyhigherthanthatofLPBFedpuretungsten.Keywords:laserpowderbedfusion;W-Re-C;substructure;W2C;crack（编辑：游航英）敬告作者为实现本刊的信息化和网络化，提高本刊的知名度、影响力和文章再利用率，《中国钨业》已入编《中国学术期刊（光盘版）》、《万方数据——数字化期刊群》、《重庆维普中文期刊数据库》、《超星“域出版”平台》和《华艺学术引用文献数据库》等，作者稿件一经录用发表，将同时被多种数据库全文收录。如作者不同意文章被收录，请另投他刊，否则将视为同意收录。作者向本刊来稿视为同意将文章的复制权、发行权、信息网络传播权、汇编权等著作权在全世界范围内转让给本刊，本刊将对录用的稿件一次性给付稿酬。另外，本刊已经签约“数字优先出版”，欢迎广大读者和作者在网上查询和阅读本刊。《中国钨业》编辑部
