caa a22 4500 467925240 CHVBK 20180406152927.0 cr unu---uuuuu 170328e20061101xx s 000 0 eng 10.1007/BF03165207 doi (NATIONALLICENCE)springer-10.1007/BF03165207 Computational study of gas quenching on carburizing hypoid ring gear [Elektronische Daten] [T. Sugimoto, M. Qin, Y. Watanabe] Computersimulation der Gasabschreckung von aufgekohlten Tellerrädern Due to its pure convective heat transfer, flexible process parameters, and clean nontoxic quenching medium, gas quenching has become a solution to traditional quench distortion and growing environmental problems. To further improve the productivity of gas quenching, the present quench pressure and flow velocity have been increased to five or more times greater than those common 10 to 20 years ago. Thus, the nonuniformity problem of gas quenching has arisen. Previous works have shown that, by varying the quench pressure, flow velocity, gas type, rack design, and furnace ducts, the uniformity of gas quenching process can be improved. In this paper, the relationships among gas pressure, flow velocity, and cooling-speed uniformity were investigated by CFD analysis coupled with experimental validation. Results indicate that the uniformity of the gas-quenching process can be improved by increasing the quench pressure and decreasing the flow velocity. This can be explained by the smoother gas flow around parts treated with higher quench pressure and lower flow velocity. In addition, it is found from the obtained results that the configuration of parts may influence the cooling capability and uniformity of a gas-quenching process significantly. Springer, 2006 Sugimoto T. Nissan Motor Co. Ltd, 6-1, Daikoku-cho, Tsurumi, 230-0053, Yokohama, Japan aut Qin M. Nissan Motor Co. Ltd, 6-1, Daikoku-cho, Tsurumi, 230-0053, Yokohama, Japan aut Watanabe Y. Nissan Motor Co. Ltd, 6-1, Daikoku-cho, Tsurumi, 230-0053, Yokohama, Japan aut BHM Berg- und Hüttenmännische Monatshefte Springer-Verlag 151/11(2006-11-01), 456-461 0005-8912 151:11<456 2006 151 501 https://doi.org/10.1007/BF03165207 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF03165207 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sugimoto T. Nissan Motor Co. Ltd, 6-1, Daikoku-cho, Tsurumi, 230-0053, Yokohama, Japan aut NATIONALLICENCE 700 1- Qin M. Nissan Motor Co. Ltd, 6-1, Daikoku-cho, Tsurumi, 230-0053, Yokohama, Japan aut NATIONALLICENCE 700 1- Watanabe Y. Nissan Motor Co. Ltd, 6-1, Daikoku-cho, Tsurumi, 230-0053, Yokohama, Japan aut NATIONALLICENCE 773 0- BHM Berg- und Hüttenmännische Monatshefte Springer-Verlag 151/11(2006-11-01), 456-461 0005-8912 151:11<456 2006 151 501 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer