The influence of composition chemical of nanofluids on hardness and wear resistance of laser-treated C20 steel

Abstract

The utilization of nanofluids in the hardening processes of steel elements contributed to the improvement of the exchange of warmth among the quenching mediums and cooling element. There is still, however, the agglomeration phenomenon which leads to the deprivation of the significant influence nanoparts on the created structure in hardened elements what influences on the mechanical proprieties of these factors in the event of this type of quenching mediums. It can get the assurance of the constant nanosize on the way of the influence of ultrasounds or changes in the chemical composition of quenching mediums dissolving nanoparticles. Within the framework of this research, it was undertaken the test of the modification of composition chemical nanofluids uses 1% the water solution nanoparts Al2O3. At the base of the analysis of cooling curve, the obtained quenching mediums showed the intensification of the warmth receipt in relation to the quenching mediums no modified. The maintenance of the nanosized particles contributed to the improvement of the wear abrasive resistance of elements with the produced surface layer as the result of laser alloying with utilization of the carburizing paste. In these quenching mediums, the obtained hardness on the section of hardened elements showed higher value and softly fall from the surface to the core in the relation to the others heat-treatable samples. The profitable changes of propriety are the effect of the arrangement changes of phase in forming structure of elements from constructional steels after hardening.