The Role of ZnO Nano-fluids on Heat Treatments of Medium Carbon Steel

Abstract

Conventional quenching versus ZnO-NP emulsion and heat treatments for medium carbon steel (CK45) has been carried out in laboratory environment condition. For comparison, the mechanical properties of CK45 and microstructure were examined. The main parameter focused in this work was the concentration of ZnO-NP in deionized water. Thus, emulsion represents a quenching medium for CK45 specimens. Optical microscope analysis for CK45 microstructure, hardness and tensile test for all specimens were done to evaluate the role of nano ZnO additives as quenching media at different concentration. Experimental results reveal that the addition of nanoparticles to the base fluid (water) astonishingly enhanced some mechanical properties as tensile strength and yield stress. 2wt.% of ZnO-NP raised the yield 14.8% and the UTS by 16.9%.

Mono Nanofluids: Review on Current Status, Challenges and Future Prospects

“…Nanofluids, with their cooling and lubricating properties, have emerged as a promising solution [79] E. Nanofluids used as heat treatment of materials Nanofluids have been considered for vast areas of applications as assortment and the multifaceted nature of the nanofluid frameworks, no understanding has been consummated on the particle-size of most potential advantages of utilizing nanofluids for heat transfer applications [80]. Safaa M et al [80] concentrated their research on new additive for water quenching media for medium carbon steel (CK45). The ZnO nanoparticles shows significant effects on cooling rate by promoting the cooling rate at 1 wt.…”

“…The refrigeration industry is progressively making efforts to replace traditional refrigerants with ones that have less impact on the environment. However, studies on potential replacements such as R1234ze or R1234yf or R450A have indicated that they yield lower heat transfer performance than the refrigerants they are intended to replace [80,[83][84].…”