Some Results of Investigations into High-Rate Hot Extrusion of Malleable Cast Iron

Based on the results of our investigations, an optimal temperature and strain-rate regime of high-rate extrusion is established (with strain rates V ₀ = 10–100 m/s, temperatures T ₀ = 800–1000°C, and elongations = 1.94–4.0) in which a deformable material (KC 37-12 malleable cast iron) manifests a high ductility. In addition, the mechanical properties – the compression strength _cs and the Brinell hardness – increase 2–3 times compared to those of cast specimens. Based on the data obtained, a novel method of rod extrusion from malleable cast iron has been developed.