Special Issue Tool Steels. Effect of MC and M6C Carbide Volume Fraction on the Propertyin W-V P/M High Speed Steels.

Carbide Structure and Fracture Toughness of High Speed Tool Steels

In the present study, M2 high speed steels were fabricated by using electro-slag rapid remelting process. Carbide structure was analysed and the fracture toughness and hardness were also measured after austenitization treatment at 1190 and 1210C followed by tempering treatment at 535C for billets with various diameters from 16 to 60 mm. Electro-slag rapid remelting (ESRR) process is an advanced...

Influence of primary precipitate shape, size volume fraction and distribution in PM tool steels on galling resistance

In sheet metal forming (SMF), the major failure reason is galling. Galling is a process of different wear stages that leads to destruction of both the forming tool and the sheet metal working piece and is, because of that, of big economic importance for the SMF industries. Therefore, investigations and researches about how tool steels microstructure affect the tool steels galling resistance is ...

Secondary Hardening in High Speed Steels

Solidification Phenomena and Properties of Some Cast Tool Steels

The freezing process. microstructures and phase relationships in some experimental cast tool steels have been investigated and developed under the various solidification conditions. Experimental steels were based on AISI M2 and M10 grades high speed steels. Addition of carbide forming elements such as niobium and titanium with and without extra carbon were made to the molten bath of the base st...

The Special Issue on High-Speed Memories

ABOUT THIS ISSUE the promises long heralded for thin-film memories are D URING the last few years, rapid advancement on the threshold of being fulfilled in operating equip-has occurred in the introduction and use of ment in the field sophisticated digital computing systems. A key System-oriented approaches to computing appjica-element of this progress has been the development of tions have resu...