MORPHOLOGY AND CRYSTALLOGRAPHY OF ALLOY NITRIDES IN DIFFUSIONAL NITRIDED LAYER OF 4Cr5MoVlSi STEEL

Acta Metall Sin

1990, Vol. 26

Issue (6): 34-39 DOI:

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MORPHOLOGY AND CRYSTALLOGRAPHY OF ALLOY NITRIDES IN DIFFUSIONAL NITRIDED LAYER OF 4Cr5MoVlSi STEEL

LUO Chengping;ZHAO Fang South China University of Technology; Guangzhou

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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.

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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.

Key words: alloy nitride mixed cluster habit plane invariant line strain

Received: 18 June 1990

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1990/V26/I6/34

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