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| CALCULATION OF YIELD STRENGTH OF Nb-V MICROALLOY STEEL CONTROLLED-ROLLED INTO DUAL-PHASE γ+α |
| SUN Fuyu; XU Wenehong (Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing) |
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Cite this article:
SUN Fuyu; XU Wenehong (Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing). CALCULATION OF YIELD STRENGTH OF Nb-V MICROALLOY STEEL CONTROLLED-ROLLED INTO DUAL-PHASE γ+α. Acta Metall Sin, 1986, 22(1): 115-152.
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Abstract The controlled roiling experiments into the dual-phase γ+a region of the Nb-V microalloy steel have been carried out using a pilot roiling mill. The effect of finishing roiling temperature on the microstructure and mechanical properties of the steel was examined. The yield strength components containing the solid solution strengthening, σ_s, precipitation strengthening, σ_p, dislocation strengthening, σ_d, subgrain strengthening, ck_s l~(-1/2) and grain strengthening, k_yd~(-1/2), were estimated so that a new expression is found as:σ_y=σ_i+σ_s+[σ_p~2+σ_d~2+(ck_s l~(-1/2))~2]~(1/2)+k_yd~(-1/2)The σ_y calculated is in quite agreement with the experimental results.
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Received: 18 January 1986
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