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10T급 고강도 냉간압조용 선조질강 제품의 신뢰성 평가
강대식(D. S. Kang),김지훈(J. H. Kim),전병철(B. C. Jeon) 한국소성가공학회 2011 한국소성가공학회 학술대회 논문집 Vol.2011 No.5
Development trend and current status were surveyed for pre-heat-treated hight strength cold heading quality wire and it"s forming technology for cylinder head bolt. Spheroidizing, quenching, and tempering heat treatments are eliminated by adapting the pre-heat-treated wire, which could reduce energy consumption and green house gas emission rate during produce parts requiring high strength. There are some challenging problems to expand application area such as enhancing forming tool life, and preventing delayed failure. Domestic research movement concerning the development and application of the new high strength cylinder bolt and reliability Assessment was introduced.