A review on the multi-scaled structures and mechanical/thermal properties of tool steels fabricated by laser powder bed fusion additive manufacturing  

作　　者：Huajing Zong Nan Kang Zehao Qin Mohamed El Mansori 

机构地区：[1]Arts et Metiers Institute of Technology,MSMP,HESAM Université,Châlons-en-Champagne F-51006,France [2]Texas A&M Engineering Experiment Station,Institute for Manufacturing Systems,College Station TX77843,USA

出　　处：《International Journal of Minerals,Metallurgy and Materials》2024年第5期1048-1071,共24页矿物冶金与材料学报（英文版）

基　　金：financial supports provided by the China Scholarship Council(Nos.202206 290061 and 202206290062)。

摘　　要：The laser powder bed fusion(LPBF) process can integrally form geometrically complex and high-performance metallic parts that have attracted much interest,especially in the molds industry.The appearance of the LPBF makes it possible to design and produce complex conformal cooling channel systems in molds.Thus,LPBF-processed tool steels have attracted more and more attention.The complex thermal history in the LPBF process makes the microstructural characteristics and properties different from those of conventional manufactured tool steels.This paper provides an overview of LPBF-processed tool steels by describing the physical phenomena,the microstructural characteristics,and the mechanical/thermal properties,including tensile properties,wear resistance,and thermal properties.The microstructural characteristics are presented through a multiscale perspective,ranging from densification,meso-structure,microstructure,substructure in grains,to nanoprecipitates.Finally,a summary of tool steels and their challenges and outlooks are introduced.

关 键 词：additive manufacturing laser powder bed fusion tool steel multi-scaled structure mechanical properties thermal properties 

分 类 号：TG665[金属学及工艺—金属切削加工及机床] TG142.1[一般工业技术—材料科学与工程]