超声雾化芯线在粉末冶金和增材制造中的应用前景

IF 0.3 Q4 THERMODYNAMICS HTM-Journal of Heat Treatment and Materials Pub Date : 2023-05-13 DOI:10.1515/htm-2022-1043
S. Jäger, F. Großwendt, S. Weber, A. Röttger
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引用次数: 0

摘要

目前增材制造的粉末生产主要是通过惰性气体雾化来完成的。一种新的工艺是从线材或棒材原料中采用超声雾化生产低氧高球形金属粉末。作为一种无坩埚的工艺,由于电弧作为能源,甚至可以加工高达1800°C的高液相温度的材料。由于进料能力有限,这种技术在连续加工高强度材料(如马氏体可淬工具钢)时存在局限性。为解决高强度材料的进料问题,探讨了超声雾化工艺中以包芯钢丝为起始原料加工高强度钢粉的可能性。因此,碳含量分别为0.12 wt. %和0.4 wt. %的两种碳马氏体可淬硬热加工工具钢被认为是参考材料。在不同参数的雾化过程中,对粉末的形貌、化学成分、形成的相以及相关的粉末性能进行表征。除了流动性外,还确定了堆积密度。在此基础上,得出了超声雾化粉末在增材制造和快速烧结技术中的适用性。
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Potentials of Ultrasonically Atomized Cored Wires for Powder Metallurgy and Additive Manufacturing
Abstract Powder production for additive manufacturing is currently mainly done by inert gas atomization. A new process is the production of low-oxygen and highly spherical metal powders by ultrasonic atomization from a wire or rod feedstock. As a crucible-free process and because of an electric arc as an energy source, even materials with a high liquidus temperature up to 1800 °C can be processed. A limitation of this technique can be found in the continuous processing of high-strength materials, like martensitic hardenable tool steels, from a stiff wired feedstock because of the limited feed ability. This paper investigates the possibility of processing high-strength steel powder using cored wire as the starting material for the ultrasonic atomization process to circumvent the feeding problem of high-strength materials. Thereby, two carbon martensitic hardenable hot work tool steels with a carbon content of 0.12 wt. % and 0.4 wt. % are considered as reference materials. After the atomization process with varying parameters, powders are characterized concerning their morphology, chemical composition, phases formed, and related powder properties. In addition to flowability, the bulk density are also determined. Based on these results, a conclusion will finally be given on the suitability of ultrasonically atomized powders for additive manufacturing and fast sintering techniques.
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来源期刊
CiteScore
1.50
自引率
33.30%
发文量
43
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