Abstract
The cryogenic treatment was played an essential role in fabrication of products with high quality and improved substance properties. The present experimental work has to improve the substance properties of Oil Hardened Non Shrinkage (OHNS) steel. Through conventional treatment, there was no possibility to increase the substance properties of steel. In cryogenic treatment process, the OHNS steel was processed under −190 °C. The cryo processor was used to treat the OHNS steel. The substance properties such as hardness and wear rate was measured through the variation of cooling rate, flow rate of liquid nitrogen and holding time. The desired optimal factors were achieved through taguchi method. The role of factor and its effect has been studied through variance test.
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