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Low Chromium Reduced-Activation Ferritic Steels

出版	ASTM International, 1990
URL	http://books.google.com.hk/books?id=0AF8zgEACAAJ&hl=&source=gbs_api

註釋Steels are being developed for fusion reactor applications containing only elements that produce radioactive isotopes that decay to low levels in a reasonable time. These reduced-activation or fast induced-radioactivity decay ferritic steels are being developed to be analogous to the Cr-Mo steels presently in the fusion program, but with molybdenum replaced by tungsten. In this paper, steels with 2.25% chromium will be discussed. To determine the effect of tungsten and vanadium on these steels, heats were produced with 2% tungsten, with 0.25% vanadium, with 1% tungsten and 0.25% vanadium, and with 2% tungsten and 0.25% vanadium. Tempering and microstructural studies were made and tensile and impact tests were conducted. Preliminary results indicate developing a low chromium Cr-W steel without molybdenum or niobium should be possible. Such steels should have properties as good as or better than the three Cr-Mo steels presently being considered as candidates for fusion reactor applications.