1、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）：1502006.35CHEN J H，ZHAO C C，LI K L，et al.Effect of TaC addition onmicrostructure and microhardness of additively manufacturedtungstenJ.Journal of Alloys and Compounds，2022，897：162978.36MULLINS W W，SEKERKA R F.Stability of a planar interfac
2、eduring solidification of a dilute binary alloyJ.Journal ofApplied Physics，1964，35（2）：444451.37LUO A，JACOBSON D L，SHIN K S.Solution softeningmechanism of iridium and rhenium in tungsten at roomtemperatureJ.International Journal of Refractory Metals andHard Materials，1991，10：107114.38ECKLEY C C，KEMNI
3、TZ R A，FASSIO C P，et al.Selectivelaser melting of tungsten-rhenium alloysJ.JOM，2021，73（11）：34393450.FormabilityandMicrostructureinLaserPowderBedFusionofW-21Re-CAlloyCHEN Jinhan1,ZHAO Congcong2,LIU Wei1（1.SchoolofMaterialsScienceandEngineering,TsinghuaUniversity,Beijing100084,China;2.JihuaLaboratory,
4、Foshan528000,Guangdong,China）Abstract:For a reduced cracks in laser powder bed fusion(LPBF)fabricated tungsten,the W-21Re-C alloy wasprepared by rhenium and carbon alloying in tungsten matrix.The formability,microstructure and mechanical propertiesof W-21Re-C alloy were studied.The results showed th
5、at the LPBF process parameter window of W-21Re-C alloy wasnarrow,and there were a certain amount of holes and cracks.The cracks were reduced compared with LPBF puretungsten.The W2C substructures,with hexagonal close-packed structure,were formed in the LPBFed W-21Re-C alloy.Because of the rapid solid
6、ification,the substructures were presented as dendrite and cellular structures.Rhenium in thealloy was mainly presented as forming solid solution in the tungsten matrix.Moreover,there was also a certain amountof rhenium between the dendrite arm as well as at the intracellular region of the W2C subst
7、ructure.Because of the solidsolution of rhenium in tungsten and the formation of W2C substructures,the microhardness of LPBFed W-21Re-C alloywas significantly higher than that of LPBFed pure tungsten.Key words:laser powder bed fusion;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
