Microstructure and thermal properties of dissimilar M300–CuCr1Zr alloys by multi-material laser-based powder bed fusion  

作　　者：Xiaoshuang Li Dmitry Sukhomlinov Zaiqing Que 

机构地区：[1]Aerosint SA,B-4040 Herstal,Belgium [2]Aalto University,Department of Chemical and Metallurgical Engineering,Espoo 02150,Finland [3]VTT Technical Research Centre of Finland,Espoo 02044,Finland

出　　处：《International Journal of Minerals,Metallurgy and Materials》2024年第1期118-128,共11页矿物冶金与材料学报（英文版）

基　　金：supported by VTT Technical Research Centre of Finland,Aalto University,Aerosint SA,and partially from European Union Horizon 2020 (No.768775)。

摘　　要：Multi-material laser-based powder bed fusion (PBF-LB) allows manufacturing of parts with 3-dimensional gradient and additional functionality in a single step. This research focuses on the combination of thermally-conductive CuCr1Zr with hard M300 tool steel.Two interface configurations of M300 on CuCr1Zr and CuCr1Zr on M300 were investigated. Ultra-fine grains form at the interface due to the low mutual solubility of Cu and steel. The material mixing zone size is dependent on the configurations and tunable in the range of0.1–0.3 mm by introducing a separate set of parameters for the interface layers. Microcracks and pores mainly occur in the transition zone.Regardless of these defects, the thermal diffusivity of bimetallic parts with 50vol% of CuCr1Zr significantly increases by 70%–150%compared to pure M300. The thermal diffusivity of CuCr1Zr and the hardness of M300 steel can be enhanced simultaneously by applying the aging heat treatment.

关 键 词：multi-material additive manufacturing laser-based powder bed fusion thermal diffusivity dissimilar metals copper alloy 

分 类 号：TG146.11[一般工业技术—材料科学与工程]