Alloys or metallic compositions – Cobalt base – Chromium containing
Patent
1997-12-22
2000-05-30
Kastler, Scott
Alloys or metallic compositions
Cobalt base
Chromium containing
420436, C22C 1907
Patent
active
060688149
ABSTRACT:
This invention relates to a cobalt-based heat-resisting composition used as a spinner wheel material to prepare glassfiber and more particularly, to a cobalt-based heat-resisting alloy having excellent strength, anti-abrasiveness and antioxidative effects at a higher temperature. To establish the chemical composition of an alloy suitable for vacuum melting and casting, Mn and Si are added to the basic alloy composition consisting of Co, Cr, Ni and W, thus controlling a deoxidating effect and fluidity; Nb, Ti, V, Zr, C and Si are used as other additive elements instead of using the conventional high-priced rare earth metals such as (Y) & Ta, Hf and B with the allowed scope of impurities enlarged, thereby preventing any casting defects from the generation of bubbles; since cementite crystal phase of both Nb and Cr is evenly distributed within an alloy and more strong web of the three-dimensional network structure, such crystal phase is strongly supported by austenite structure of Co and Ni having tungsten carbide and Zr as a nucleus.
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Kang Hwan Sub
Park Kyeong Ji
Kastler Scott
Keum Kang Co., Ltd.
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