Abstract
Low alloyed steel powder Fe-0.85Cr-0.15Mo-C is dedicated to substitute Fe-Cu-C for PM steel precision parts. It is conceived as a sustainable option to counter recycling and price problems of copper It is known from previous research that the introduction of oxygen sensitive elements like chromium leads to a change in deoxidation behaviour during the sintering process of PM steels compared to classical alloying elements like copper, nickel or molybdenum. This behaviour strongly depends on the chromium content of the powder. By DTA/MS and DIL/MS experiments in different atmospheres, this powder is compared to classical Fe-Cu-C and higher chromium alloyed powders to reveal significant changes during the heating stage of the sintering process and to show if special measured are needed to sinter these steels compared to Fe-Cu-C. Thermal treatment to simulate dewaxing is performed to investigate the change in surface chemistry of the pressed compacts. The thermoananalytical experiments are accompanied by analysis of carbon and oxygen content and by microstructural characterization.
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