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Ultrafine-grained WC-Co bulk materials were prepared by a new method that contains pretreatment of the milled powder mixture and subsequent spark plasma sintering (SPS). Ball milling parameters and the pretreatment temperature have significant effects on the microstructure and properties of WC-Co cermets. The prepared cermets have a mean grain size of less than 0.5 μm even with a pretreatment temperature...
Complicate preparing procedure of ultrahigh carbon steels (UHCSs) greatly limited their practical application in industry. In the course of searching a simple method for the preparation of the ultrahigh carbon steels, we found a fully fine pearlite microstructure formed in the Al-added steel with high carbon content. Our results proved that the steel can be directly spheroidized into uniformly distributed...
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