材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
3.5NiCrMoV鍛鋼の応力腐食割れ寿命分布の解析
中山 武典藤原 和雄下郡 一利宮川 睦啓木下 修司
著者情報
ジャーナル フリー

1988 年 37 巻 412 号 p. 30-35

詳細
抄録

The stress corrosion cracking (SCC) life time of turbine rotors in actual nuclear and fossil power plants was analyzed by a statistical method and was estimated to obey an exponential probability distribution. Then, the laboratory accelerated test condition to exhibit such an exponential probability distribution was investigated using 3.5NiCrMoV steel forgings which are being used most widely as a material for low pressure turbine rotors. The exposure of double U-bend specimens in liquid/gas interface of undeaerated 30% NaOH aqueous solution was found to be most fitted for the purpose. Under this condition, the effects of alloying elements and mechanical strength/microstructure on SCC life were studied. The reduction of P content and/or the addition of a small amount of Nb in steel and the reduction of mechanical strength were effective to prolong the SCC life of turbine rotors.

著者関連情報
© 日本材料学会
前の記事 次の記事
feedback
Top