Effect of binder composition on properties of 316L stainless steel bimodal powder feedstock

N. Toropkov, E. Glazkova, N. Rodkevich, A. Pervikov, M. Lerner
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引用次数: 1

Abstract

Metal powder composites for powder injection molding (PIM) technology have been studied. Stainless steel 316L bimodal powders consisting of both nano and microparticles and multicomponent binders based on PLA/PMMA (feedstock I), paraffin wax/PE-LD/PMMA (feedstock II) and polyethylene wax (feedstock III) were used to obtain feedstock. The effect of the binder composition on the characteristics of feedstocks and sintered compacts was investigated. The use of PMMA in a binder allows maintaining the strength of the compacts to high temperatures when sintering. The debinding of “green compacts” from feedstock III leads to an almost complete removal of paraffin wax, and the “brown” parts retain their shape only due to the low-temperature sintering of nanoparticles. The use of the paraffin wax as a binder requires an increase in the content of the bimodal metal powder in the feedstock to 95 wt% to increase the strength of the compacts. Feedstocks and molded compacts were characterized by TEM, SEM, DSC-TG methods.Metal powder composites for powder injection molding (PIM) technology have been studied. Stainless steel 316L bimodal powders consisting of both nano and microparticles and multicomponent binders based on PLA/PMMA (feedstock I), paraffin wax/PE-LD/PMMA (feedstock II) and polyethylene wax (feedstock III) were used to obtain feedstock. The effect of the binder composition on the characteristics of feedstocks and sintered compacts was investigated. The use of PMMA in a binder allows maintaining the strength of the compacts to high temperatures when sintering. The debinding of “green compacts” from feedstock III leads to an almost complete removal of paraffin wax, and the “brown” parts retain their shape only due to the low-temperature sintering of nanoparticles. The use of the paraffin wax as a binder requires an increase in the content of the bimodal metal powder in the feedstock to 95 wt% to increase the strength of the compacts. Feedstocks and molded compacts were characterized by TEM, SEM, DSC-TG methods.
粘结剂组成对316L不锈钢双峰粉料性能的影响
研究了用于粉末注射成型(PIM)技术的金属粉末复合材料。采用基于PLA/PMMA(原料I)、石蜡/PE-LD/PMMA(原料II)和聚乙烯蜡(原料III)的多组分粘结剂和纳米和微粒组成的不锈钢316L双峰粉末获得原料。研究了粘结剂的组成对原料性能和烧结坯性能的影响。在粘合剂中使用PMMA可以在烧结时保持致密物在高温下的强度。原料III的“绿色致密物”的脱粘导致石蜡几乎完全去除,而“棕色”部分仅由于纳米颗粒的低温烧结而保持其形状。使用石蜡作为粘结剂需要将原料中双峰金属粉末的含量增加到95%,以提高压坯的强度。采用TEM、SEM、DSC-TG等方法对原料和成型坯进行了表征。研究了用于粉末注射成型(PIM)技术的金属粉末复合材料。采用基于PLA/PMMA(原料I)、石蜡/PE-LD/PMMA(原料II)和聚乙烯蜡(原料III)的多组分粘结剂和纳米和微粒组成的不锈钢316L双峰粉末获得原料。研究了粘结剂的组成对原料性能和烧结坯性能的影响。在粘合剂中使用PMMA可以在烧结时保持致密物在高温下的强度。原料III的“绿色致密物”的脱粘导致石蜡几乎完全去除,而“棕色”部分仅由于纳米颗粒的低温烧结而保持其形状。使用石蜡作为粘结剂需要将原料中双峰金属粉末的含量增加到95%,以提高压坯的强度。采用TEM、SEM、DSC-TG等方法对原料和成型坯进行了表征。
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