Snoek-K■-kster DAMPING IN 340 MPa BAKE HARDENING STEELS
CHE Yunyi; LIU Fendi; ZENG Guiyi; XU Yuchang; JI Jingwen (College of Sciences; Northeastern Univerisity; Shenyang 110006)HUA Qiaozhu; LIU Jianmin; HUANG Zhenru(Institute of Iron & Steel; Baoshan Iron & Steel Company; Shanghai 201900)Correspondent: JI Jingwen; professor; Tel: (024)25915148; Fax: (024)23891072;E-mail: cos ramm. cneu. edu. cn.
Cite this article:
CHE Yunyi; LIU Fendi; ZENG Guiyi; XU Yuchang; JI Jingwen (College of Sciences; Northeastern Univerisity; Shenyang 110006)HUA Qiaozhu; LIU Jianmin; HUANG Zhenru(Institute of Iron & Steel; Baoshan Iron & Steel Company; Shanghai 201900)Correspondent: JI Jingwen; professor; Tel: (024)25915148; Fax: (024)23891072;E-mail: cos ramm. cneu. edu. cn.. Snoek-K■-kster DAMPING IN 340 MPa BAKE HARDENING STEELS. Acta Metall Sin, 1998, 34(8): 831-835.
Abstract The Snoek-K- ster(SKK) damping in two bake hardening (BH) steels of 340 MPa class has been studied. It is found that the activation energies(H)of the middle-temperature peaks measured with a general range of frequency are obviously larger than that of SKK peak,and that there are double peaks in all the curves of Q-1- T of the steel containing 0.024%C which is one with higher content of carbon in both the steels, when the measurements were conducted with frequencies ＞1.7 Hz. The results were discussed in detail.
1 Magalas L B.J Phys, 1996; 4: 163 2 Kster W L, et al. Arch Eisenh ttenw, 1954; 25: 569 3 T S.Trans AIME,1948;176:448 4戢景文,赵增琪,贺礼端,耿殿奇物理学报,1985;3:1620(Ji J W, Zhao Z Q, He L D, Geng D Q. Acta Metall Sin, 1985; 34: 1620) 5戢景文,赖祖涵,吴玉琴,张国福,李广义.金属学报,1991; 27:A408(Ji J W,Lai Z H,Wu Y Q,Zhang G F,Li G Y.Acta Metall Sin,1991;27:A408) 6Petarra D P, Bechers P N. Acto Metall, 1967; 15: 791 7 Ino H, Sugeno T. Acta Metall, 1967;15:1197 8戢景文,魏全金,张国福,赖祖涵,陈廷国.金属学报.1902;28:A207(Ji J W, Wei Q J, Zhang G F, Lai Z H, Chen T G. Acta Metall Sin, 1992; 28: A207)
