| 摘要 |
PURPOSE:To produce a Cr additive preventing a component other than Cr from entering an alloy and suitable for use in the production of all sorts of Cr alloys including a superalloy, by using Cr, O and C in a specified ratio as constituents and allowing a specified peak to exist in X-ray diffraction. CONSTITUTION:This Cr additive for an alloy has a compsn. represented by a formula CrxCyCz (where in case of x=1, 0.04<=y<=0.35 and 0.03<=z<=0.30) and has a characteristic peak at d=3.32Angstrom (2theta=26.8 deg.) in X-ray diffraction. The additive can be obtd. by mixing chromium oxide with C, granulating the mixture and reducing the resulting granules under heating. Carbon black, artificial graphite or oil coke may be used as the C as starting material and the ref. amt. of the C used is about 20-25wt.% of the amt. of the chromium oxide used. The ratio of O to C in the additive can be regulated by regulating the amt. of the C used.
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