Nodular graphite cast iron containing calcium,rare earth metals and magnesium and a method for its production
Abstract
Abstract NODULAR GRAPHITE CAST IRON CONTAINING CARBON IN THE RANGE OF FROM 3.2 TO 4.2% BY WEIGHT, SILICON IN THE AMOUNT OF FROM 1 TO 4.5% BY WEIGHT AND IN WHICH THE PERCENT CARBON PLUS ONE-THIRD THE PERCENT SILICON IS EQUAL TO OR GREATER THAN 4.0% IS PROVIDED. THE NODULAR GRAPHITE CAST IRON IS CHARACTERIZED BY CONTENTS OF RARE EARTH METAL (R) 0.010-0.12% BY WEIGHT, MAGNESIUM (MG) 0.006-0.040% BY WEIGHT AND CALCIUM (CA) 0.002-0.025% BY WEIGHT, AND HAVING THE CONTENT RATIO OF RARE EARTH METAL AND MAGNESIUM WITHIN THE RANGE R/MGV1.0-4.0. THE NODULAR GRAPHITE CAST IRON IS PRODUCED BY ADDING TO A MOLTEN IRON HAVING A SULPHUR CONTENT OF LESS THAN 0.03% BY WEIGHT, A NODULAR GRAPHITE CAST IRON ADDITIVE CONSISTING ESSENTIALLY OF 10 TO 30% BY WEIGHT OF MAGNESIUM FLUORIDE, FROM 10 TO 30% BY WEIGHT RARE EARTH METAL FLUORIDE, AND FROM 40 TO 80% BY WEIGHT CALCIUM-SILICON.
Inventors
- 👤 K Kusaka
Bibliographic Details
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