![]() ![]() ![]() Thus, it may be an adequate alternative material to commercial SASS and offers the possibility to save cobalt for future applications. Due to the combination of primary Nb-rich globular-blocky MX-type carbonitrides and eutectic M 6(C,N) carbonitrides dispersed within an Laves phase strengthened austenitic matrix, this steel provides comparable hardness and significantly improved wear resistance at elevated temperature. In contrast, within the Co-free steel eutectic M 6(C,N) carbonitrides are distributed more homogeneously showing less tendency to form network structures. In the aged condition, results show that the 1.4957 steel suffers a higher material loss due to brittle failure initiated by coarse eutectic Cr-rich carbides which are incorporated into a mechanically mixed layer during abrasive loading. The properties of a cobalt-free cast superaustenitic stainless steel (SASS) is investigated comparatively to the commercial high-cobalt alloyed GX15CrNiCo21-20-20 (1.4957, N-155) steel regarding its global hardness and wear resistance at elevated temperature by means of in situ hot hardness tests and cyclic abrasive sliding wear tests against an Al 2O 3 (corundum) counter-body at 600 ☌.
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