Synthesis of nanostructured WC-Co hardmetal by selective laser melting

被引：38

作者：

Khmyrov, R. S. ^{[1
]}

Safronov, V. A. ^{[1
]}

Gusarov, A. V. ^{[1
]}

机构：

[1] Moscow State Univ Technol STANKIN, Vadkovsky Per 3a, Moscow 127055, Russia

来源：

IUTAM SYMPOSIUM ON GROWING SOLIDS, 2015 | 2017年 / 23卷

基金：

俄罗斯科学基金会;

关键词：

metal matrix composite; ball milling; roughness; dendrite; thermal shock; RESIDUAL-STRESSES; METAL POWDERS; MICROSTRUCTURE;

D O I：

10.1016/j.piutam.2017.06.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Selective laser melting is a layer-by-layer technique to form a solid part from powder. The thermal cycle of this process can be as short as one millisecond and less. This is why it is favorable to obtain nanostructured materials with advanced properties. Metal matrix composite WC-Co is studied. Micron-sized Co powder was mixed with WC nanopowder in a planetary ball mill to prepare uniform composite powder. Single remelted beads and monolayers were obtained from the composite powder on the substrates of sintered WC-Co. No cracks and good adhesion to the substrate are observed. The high cooling rate up to 10(6) K/s explains the fine microstructures. Increasing the scanning velocity is favourable because of refining the microstructure and decreasing the balling-effect. The attained values of surface roughness are as low as 1-2 mu m. (C) 2015 The Authors. Published by Elsevier B.V.

引用

页码：114 / 119

页数：6

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