| 摘要 |
<p>Disclosed is a Fe-based alloy powder for argon arc overlay welding, the powder consisting of Fe-Cr, graphite, and iron powder. A process for preparing the Fe-based alloy powder for argon arc overlay welding comprises: uniformly mixing Fe-Cr, graphite, and iron powder according to a certain ratio, and preparing same into flakes with sodium silicate as a binder; the flakes are naturally dried for 10 h and then placed in a drying oven and dried at 200°C for 1.5 h, and oven cooled. With a tungsten electrode argon arc as a heat source, the obtained substance is overlay welded on the surface of a material to form a wear- and corrosion-resistant molten cladding layer. The molten cladding layer has a uniform texture, and can generate new phases such as chromium-carbon compounds; the deposit welded layer has a hardness greater than HRC55 and can effectively improve material performances such as wear-, corrosion-, and high temperature-resistance, so as to extend the service life of parts. In addition, the Fe-based alloy powder for argon arc overlay welding is simple to prepare, low in cost, and thus has a relatively high use value.</p> |
