The structure was determined by means of X-ray diffraction (XRD) patterns and the retained austenite was detected to all the conditions of heat treatment. The technique of scanning electronic microscopy (SEM) was used to evaluate the microstructure and to establish a relation with the property of transverse rupture strength. The transverse rupture strength was evaluated by means of three point bending tests and the hardness by means of Rockwell C and Vickers tests. The sintering produced an acceptable microstructure and densities near to the theoretical. The characterization of the vacuum sintered M3: 2 high speed steel was performed by measuring the densities of the green compacts and after the sintering cycle. The vacuum sintered M3: 2 high speed steel can be an alternative to the more expensive high speed steel produced by hot isostatic pressing and with similar properties presented by the conventional one. Sinter 23 obtained by hot isostatic pressing (HIP), VWM3C obtained by the conventional route and a M3: 2 high speed steel obtained by cold compaction of water atomized powders and vacuum sintered with and without the addition of a small quantity of carbon were evaluated after the same heat treatment procedure. In this work AISI M3: 2 high speed steels obtained through different techniques of manufacturing, submitted to the same heat treatment procedure were evaluated by measuring their mechanical properties of transverse rupture strength and hardness. International Nuclear Information System (INIS)

Comparative study of AISI M3: 2 high speed steel produced through different techniques of manufacturing

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