ボイラチューブ用９Ｃｒ‐１Ｍｏ‐Ｖ‐Ｎｂ‐Ｂ鋼のクリープ破断強度

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タイトル別名
  • Creep Rupture Strength of 9Cr-1Mo-V-Nb-B Steel Developed for Boiler Applications
  • ボイラ チューブヨウ 9Cr 1Mo V Nb B コウ ノ クリープ ハダン

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In order to improve the thermal efficiency of power station, it is necessary to elevate the operation temperature and pressure of boilers. This condition usually requires the usage of a large quantity of stainless steels and superalloys, which brings in an increase in construction cost and consequently in per kW power cost. Thus, it is important to develop a new kind of steel which is economical and can be a substitute for austenitic stainless steel tubing.<br>In the present study, the effects of molybdenium, vanadium, titanium, niobium, wolfram, cupper and boron on the creep rupture strength of medium chromium steels were investigated, and a new steel with excellent creep rupture strength, workability, and weldability was developed. The chemical composition of the new steel is low carbon-9%Cr-1%Mo-0.2%V-0.3%Nb-B, and its 100000hr creep-rupture strength is 8.0kg/mm2 at 600°C.

収録刊行物

  • 材料

    材料 28 (308), 356-364, 1979

    公益社団法人 日本材料学会

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