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arc additive manufacturing of gradient hot forging die with shaped waterways

China Welding 2024年第1期33卷 27-39页

作者：余圣甫林海涛邱源 State Key Laboratory of Materials Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhan 430074China

Under the working environment of high temperature and strong load impact,hot forging die is prone to failure which reduces the service life of *** arc additive manufacturing in the die cavity,a gradient material hot forging die with high precision,superior per-formance,and conformal cooling channels is *** improves the toughness of the die cavity and reduces the working temperature,thereby forming an isothermal field,which is an effective method to enhance the lifespan of the hot forging *** kinds of gradient flux-cored wires are designed for the surface of 5CrNiMo steel,and the microstructure and mechanical properties between gradient interfaces were *** on the spatial curved structure of shaped waterways in the hot forging die cavity,a study was conducted on the strategy of partitioned forming for the manufacturing of the die with shaped *** order to avoid interference with the arc gun,the hot for-ging die is divided into four regions,namely the transition region,upper,middle,and lower region,based on a combination of cavity depth and internal U-shaped and quadrilateral *** results show that the developed flux-cored wires have good moldability with straight sides of deposited metal under different process parameters and flat surface without cracks,pores and other *** the same working conditions,the life of hot forging die formed by the gradient materials is more than multiple times that of the single material hot forging die,and the temperature gradient field of the shaped waterway die is 7℃/cm smaller than that of traditional straight waterway.

关键词： gradient materials shaped waterways arc additive manufacturing mechanical property

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Fabrication of bulk Al-Co-Cr-Fe-Ni high-entropy alloy using combined cable wire arc additive manufacturing(CCW-AAM):Microstructure and mechanical properties

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Journal of Materials Science & Technology 2021年第15期74卷 136-142页

作者： Qingkai Shen Xiangdong Kong Xizhang Chen College of Mechanical and Electrical Engineering Wenzhou UniversityWenzhou325000China

additive manufacturing is a very promising manufacturing method widely used in various *** this study,for the first time,a new type of combined cable wire(CCW)with multi-element composition has been designed and developed for arc additive manufacturing(AAM)of non-equiatomic Al-Co-Cr-FeNi high-entropy *** composed of 7 filaments and 5 elements has the advantages of high deposition efficiency,self-rotation of welding arc and energy saving *** HEA walls were fabricated under pure argon gas using cold metal transfer *** observations of the developed HEA reveal(i)BCC and FCC phases,(ii)Good bonding between layers and(iii)defect-free *** developed alloy exhibits high compression strength(~2.8 GPa)coupled with high plastic strain(~42%)values(possess both strength and ductility).It has been identified that by varying the heat input via torch travel speed,the microstructure and mechanical properties of the HEA can be *** this feasibility study,it has been proved that the innovative CCW method can be used to manufacture HEAs with ***,the study highlights the advantage of the rapid cooling involved in the CCW-AAM process which gives rise to superior mechanical properties.

关键词： Combined cable wire arc additive manufacturing High-entropy alloy Microstructure Mechanical properties

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