Chromium base alloy replacing cobalt base with high temperature strength and oxidation resistance at high temperature

摘要

The present invention relates to a chromium-based alloy that replaces cobalt base with excellent high temperature strength and high temperature oxidation resistance. The present invention replaces the cobalt base with excellent high temperature strength and high temperature oxidation resistance. The chromium base alloy excludes the use of cobalt and nickel in manufacturing heat-resistant materials for skid rails used in hot rolling and heating furnace facilities, and mainly contains chromium (Cr). As an alloy, the alloy has a composition ratio of 55 to 80 parts by weight of chromium (Cr), 0 to 10 parts by weight of tungsten (W), 0 to 5 parts by weight of molybdenum (Mo), and 0 to 5 parts by weight Composed of niobium (Nb), wherein carbon (C) 0.05 to 0.5 parts by weight, oxygen (O) 0.03 parts by weight or less, sulfur (S) 0.02 parts by weight or less, silicon (Si) 1.5 parts by weight or less, the remainder It is made of iron (Fe). Accordingly, only one element of tungsten, molybdenum, and niobium relative to the main chromium is formed in a proportion of a certain weight part to form an alloy, thereby excluding the use of expensive metal cobalt as a super-heat-resistant alloy used for skid rails, etc. As a base, it is possible to provide a heat-resistant alloy excellent in high temperature strength and high temperature oxidation resistance, and these alloys can provide a satisfactory impact value, oxidation reduction amount, and high temperature compression characteristics to solve the conventional problems in this technical field.