MORPHOLOGY AND CRYSTALLOGRAPHY OF ALLOY NITRIDES IN DIFFUSIONAL NITRIDED LAYER OF 4Cr5MoVlSi STEEL
LUO Chengping;ZHAO Fang South China University of Technology; Guangzhou
Cite this article:
LUO Chengping;ZHAO Fang South China University of Technology; Guangzhou. MORPHOLOGY AND CRYSTALLOGRAPHY OF ALLOY NITRIDES IN DIFFUSIONAL NITRIDED LAYER OF 4Cr5MoVlSi STEEL. Acta Metall Sin, 1990, 26(6): 34-39.
Abstract A TEM investigation was made of the morphology, orientation rela-tionship and habit plane of three kinds of alloy nitrides, namely CrN, VN andMo_2N, formed simultaneously in the diffusional nitrided layer of a 4Cr5MoV1Si(H13) steel nitrided at 580℃. It was found that the nitrides were precipitated bycontinuous clustering and subsequent ordering of both interstitial (N) and substitu-tional (Cr, V, Mo) solutes on {001} habit plane. The observed morphology andcrystallography of the nitrides are in good agreement with the predictions from theinvariant line strain model proposed for precipitation transformations.
1 Phillips V A, Seybolt A U. TMS AIME, 1968; 242: 2415 2 Jack K H. Heat Treatment'73, London: The Metals Society, 1973: 39 3 郑经紘,王育烽,沈甫法,俞德刚,毛树楷.金属学报,1985;21:A333 4 Hirsch P, Howie A, Nicholson R B, Pashley D W, Whelan M J. Electron Microscopy of Thin Crystals, Malabar, Florida: Krieger R E Publishing Company, 1977: 320 5 #12 6 Dahmen U. Acta Metall, 1982; 30: 63 7 Luo C P, Weatherly G C. Acta Metall, 1987; 335: 1963 8 Aaronson H I, Laird C, Kinsman K R. Phase Transformations, Metal Park, Ohio: ASM, 1970: 313
LUO Chengping;XU Linkang;CHA Jianzhong South-China University of Technology; Guangzhou Guangdong Iron and Steel Research InstituteDepartment of Mechanical Engineering(Ⅱ);South-China University of Technology; Guangzhou 510641. CRYSTALLOGRAPGY OF LATH MARTENSITE IN ULTRAHIGH-STRENGTH STEEL 300M[J]. 金属学报, 1993, 29(7): 28-33.
YU Yongsi;CAO Zhiben;WANG Fugang;GUO Xiaobing Dalian University of Technology Jinzhou Institute of Technology lecturer;Department of Materials Engineering;Dalian University of Technology; Dalian 116024. EFFECT OF NITROGEN ON MICROSTRUCTURE AND PROPERTIES OF HK50 ALLOY[J]. 金属学报, 1990, 26(2): 16-20.
