Study on the Formability of Iron-Based Powder Metal Materials in Plasma arc Direct Metal Forming Process

摘要

The specific Fe-based alloy for direct metal forming was designed and prepared under multi-layer cladding condition. The powder was designed for getting the better formability, toughness and hardness. The experiment used KR6 robot and NW5000 digital power supply as the hardware environment. Microstructure and hardness of the layer formed by different powder were analyzed by using X-ray diffraction (XRD) and Transmission Electron Microscope (TEM). The result shows that thermal expansion coefficient correlated with processing formability is not linearity. Hardness of the layers is correlated to elements. phase of the coatings was formed by (FeNi) and (FeCrNi), and a little Cr23C6, Fe3Si and MoO2.