Bányászati és Kohászati Lapok - Öntöde, 1979. (30. évfolyam, 1-12. szám)
1979-01-01 / 1. szám
CONTENTS Tamás, I.: Materials, equipment and methods developed in the Research Institute for Ferrous Metallurgy to improve the quality of iron castings P 1 The author describes the auxiliary alloys developed for the production of cast iron with spheroidal and vermicular graphite, the modifying material used to reduce the sensitivity to wall thickness of the cast iron with lamellar graphite and the equipment and technology of utilization. He discusses the reduction of the manganese content in cast iron by gas metallurgical methods and summarizes the properties of high-strength cast iron grades. The commercial results of these novel technologies are described. Lech, Z.Sçk-Sas, 0.: Al-Mg alloys for decorative fittings in the building industry ........................ P 9 The authors review the alloys used for decorative castings in the building industry, the characteristics of the Al-Mg alloys, the influence of the contaminants on the properties of these alloys and on the oxide coat produced by oxidation on the casting surface. Koltai, в.: Quality requirements and casting defects in the production of aluminium pistons ................. 13 The author summarizes the requirements in the piston material and surface quality. He analyzes the production experiences, the causes of defects and the possibilities of their elimination. /