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Acta Metall Sin  1984, Vol. 20 Issue (6): 411-493    DOI:
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EFFECT OF Nb ON LONG-TIME AGING STABILITY OF AN AUSTENITIC HEAT RESISTING STEEL 37Mn31Al3Cr2MoVWNbB
ZHANG Futian; SU Lijuan; ZHANG Yanshen (Institute of Metal Research; Academia Sinica; Shenyang) (Manuscript received 8 November; 1983)
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ZHANG Futian; SU Lijuan; ZHANG Yanshen (Institute of Metal Research; Academia Sinica; Shenyang) (Manuscript received 8 November; 1983). EFFECT OF Nb ON LONG-TIME AGING STABILITY OF AN AUSTENITIC HEAT RESISTING STEEL 37Mn31Al3Cr2MoVWNbB. Acta Metall Sin, 1984, 20(6): 411-493.

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Abstract  The effect of Nb content on the long-time aging stability in hot strength and structure of an austenitic heat resisting steel 37Mn31Al3Cr2MoVWNbB has been investigated. It was found that the hot strength of the steel is no longer decreased and the structural stability is dependent on the shape and distribution of NbC after long-time aging at 650℃. The coarse prior NbC deteriorates the structural stability and promotes the decomposition of matrix and the growth of x-phase which embrittles the steel. Thus, it seems to be considered to cut down the Nb content in the steel.
Received:  18 June 1984     
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