| 摘要 |
<p>A cast-iron alloy is made by adding 0,6 per cent or more, preferably 1-3 per cent, of copper to a molten mixture containing at least 25 per cent of steel, generally in the form of scrap steel, the remainder being made up of cast iron scrap, pig iron, and alloys. The copper may be added as the metal, alone or with a silicide of calcium, magnesium, or barium, or as an iron alloy containing 10-60 per cent or more of copper, or a silicon alloy containing for example 30 per cent or 70 per cent of copper, or an alloy consisting of 76 per cent of copper, 8 per cent of calcium, and 16 per cent of silicon. A graphitizing agent is preferably added which may be any of the following: calcium, magnesium, barium, strontium, sodium, potassium, zirconium, titanium, beryllium, cerium, nickel, molybdenum, or silicides of these metals, or silicon, or ferro-silicon. Specifications 210,118 and 292,164, [both in Class 72], are referred to.</p> |
