Structure and Properties of Spray-Formed Tool Steel with Increased Chromium Content

 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2010, #03/04
http://www.materials.kiev.ua/article/1531

Abstract

The paper examines the structure of tool (corrosion-resistant) steel produced by spray formation followed by thermomechanical treatment. The optimal conditions for steel formation are established. It is shown that the fine carbide component forms in melt quenching. As a result, there is no carbide inhomogeneity in alloyed tool steel after plastic deformation. The steel structure remains superfine after high-temperature (1090°C) hardening treatment. The bending strength of deformed hardened steel is 2500–2600 MPa, impact strength 230–200 kJ/ m2, and hardness 56–57 HRC.


PHYSICAL-MECHANICAL PROPERTIES, PLASTIC DEFORMATION (ROLLING), SPRAY PROCESS, STRUCTURE, THERMAL TREATMENT