STUDIES ON MECHANICAL PROPERTIES OF LOW ALLOY STEEL CASTINGS(I)

Abstract

Mechanical properties of low alloy steel castings, that containedO.6-1.8%Mn, 0.1-3.O% Cr, and up to O.5% Mo, were investigated. Heattreatments used were homogenization (1000°C and 1100°C), normalizing (870°C) and tempering (650°C). Without tempering, heat trgatments were carried on by air cooling. Tempetings were carried on by air cooling and furnace cooling. The results obtained were as follows;
O.35% C, 1.7% Mn, O.3% Mo steel casting had shore hardness mumber 33-38, as normalized and tempered. Elongation of Cr-Moseries and elongation and impact value of Mn-Mo series treated by homogenization were better than that which were not homogenized. There was no difference in the other mechanical properties, between homogenized and not homogenized.