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The Effect on the Strength According to Carbon Content of Kovar Steel  

Choi, Byung-Hui (Department of Automobiles, Chosun University College of Science & Technology)
Choi, Byung-Ky (Department of Mechanical Engineering, Chosun University)
Publication Information
Journal of the Korean Society of Safety / v.25, no.3, 2010 , pp. 28-33 More about this Journal
Abstract
Ni alloy steel is able to use during long time because of good acid and corrosion resistance. So, it's research has focused on developing the alternative alloy which is economically feasible. Recently, consumption of Kovar steel is gradually increased in field of the jet engine and the gas turbine because of its low thermal expansive characteristics. The specimens of Kovar steel(29%Ni-17%Co) contain 0.00%C, 0.03%C, 0.06%C, 0.10%C and 0.20%C, respectively. Ingots are manufactured by VIM(vacuum induction melting furnace) and then specimens are made by automatic hot rolling after heat treatment. Strength of Kovar steel according to carbon contents is estimated by hardness, tensile and impact test. Hardness of the 0.20%C specimen is more improved approximately 14.4% than one of base metal. Its strength increases 32.4% of a base metal, and its impact energy is also enhance 11.5%.
Keywords
kovar steel; carbon content; micro-structure; strength; elongation; base metal;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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