Acta Metall Sin  1991, Vol. 27 Issue (5): 27-32    DOI:

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EFFECT OF W CONTENT ON MECHANICAL PROPERTIES OF 12％Cr-W-V-Nb HEAT RESISTANT STEEL

LIU Xingyang Northeast University of Technology; Shenyang; FUJITA Toshio University of Tokyo; Japan

LIU Xingyang Northeast University of Technology; Shenyang; FUJITA Toshio University of Tokyo; Japan. EFFECT OF W CONTENT ON MECHANICAL PROPERTIES OF 12％Cr-W-V-Nb HEAT RESISTANT STEEL. Acta Metall Sin, 1991, 27(5): 27-32.

Abstract References Related Articles Recommended Metrics Download:  PDF(1130KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The effect of W content on the mechanical properties at elevated and room temperatures of 12%Cr-W-V-Nb heat resistant steel has been studied. The room temperature tensile properties vary no more with the W content ranged 2.2--3.0 wt%, while the impact toughness decreases continuously with the increase of W content. Increase in W content made the increase of short-term creep rupture strength,but no improvement over long-term one. The effect of increasing W content on the precipitation behaviour is revealed not only to promote formation of Laves phase Fe_2 W and increase of total amount of precipitates, but also to accelerated the coarsening of precipitate after annealed on high temperature reheating. When the precipitate is not yet coarsened as shorter in rupture life, the precipitation hardening effect may be intensified by the increasing of precipitate, so that the high temperature strength may be raised by the increase of W content, while the precipitate may coarsen markedly and the precipitation hardening effect may reduce on heating for sufficient long time. Key words:  Cr-WVNb steel      tungsten      mechanical property      precipitation behaviour      Received:  18 May 1991      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1991/V27/I5/27 1 刘兴阳,藤田利夫,铁钢,1987;73:1034 2 刘兴阳,藤田利夫,铁钢,1988;74:513 3 田中秀毅,刘兴阳,柴田浩司,材料,1988;1:S531 4 Briggs J Z, Parker T D. The Super 12% Cr Steels Climax Molybdenun Comp. of Michigan, USA 1982 5 高桥纪雄·藤田利夫,铁钢,1974:60:1506 [1] ZHENG Liang, ZHANG Qiang, LI Zhou, ZHANG Guoqing. 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