通过放电等离子烧结法对添加钼的钨基重合金进行粉末冶金加工及表征

Powder Metallurgical Processing and Characterization of Molybdenum Addition to Tungsten Heavy Alloys by Spark Plasma Sintering.

作者信息

Annamalai A Raja, Muthuchamy A, Srikanth Muthe, Natarajan Senthilnathan, Acharya Shashank, Khisti Anup, Jen Chun-Ping

机构信息

Centre for Innovative Manufacturing Research, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India.

Department of Metallurgical and Materials Engineering, NIT Tiruchirappalli, Tiruchirappalli 620015, Tamil Nadu, India.

出版信息

Materials (Basel). 2021 Oct 2;14(19):5756. doi: 10.3390/ma14195756.

DOI:10.3390/ma14195756

PMID:34640165

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8510026/

Abstract

The effect of adding molybdenum to the heavy tungsten alloy of W-Ni-Fe on its material characteristics was examined in the current study. The elemental powders of tungsten, iron, nickel, and molybdenum, with a composition analogous to W-3Fe-7Ni-xMo (x = 0, 22.5, 45, 67.5 wt.%), were fabricated using the spark plasma sintering (SPS) technique at a sintering temperature of 1400 °C and under pressure of 50 MPa. The sintered samples were subjected to microstructural characterization and tested for mechanical strength. The smallest grain size of 9.99 microns was observed for the 45W-45Mo alloy. This alloy also gave the highest tensile and yield strengths of 1140 MPa and 763 MPa, respectively. The hardness increased with the increased addition of molybdenum. The high level of hardness was observed for 67.5Mo with a 10.8% increase in the base alloy's hardness. The investigation resulted in the alloy of 45W-7Ni-3Fe-45Mo, observed to provide optimum mechanical properties among all the analyzed samples.

摘要

本研究考察了在W-Ni-Fe重钨合金中添加钼对其材料特性的影响。采用放电等离子烧结（SPS）技术，在烧结温度为1400℃、压力为50MPa的条件下，制备了钨、铁、镍和钼的元素粉末，其成分类似于W-3Fe-7Ni-xMo（x = 0、22.5、45、67.5 wt.%）。对烧结后的样品进行微观结构表征并测试其机械强度。45W-45Mo合金的晶粒尺寸最小，为9.99微米。该合金的抗拉强度和屈服强度也最高，分别为1140MPa和763MPa。硬度随着钼添加量的增加而提高。67.5Mo合金的硬度较高，比基体合金的硬度提高了10.8%。研究结果表明，在所有分析样品中，45W-7Ni-3Fe-45Mo合金具有最佳的机械性能。