Abstract:
Effect of small quantities of Copper addition on mechanical properties of cast iron was investigated with a view to pass on quantitative data under local working conditions to Pakistan Foundrymen. Attempt was made to correlate the mechanical properties with metallurgical structure. Two sets of experiments were conducted. In the first set, the cast iron was melted with various percentages of copper from 0.3 to 3.0 in steps of 0.3%. In the other set, the cast iron was melted with increasing additions of steel scrap upto 35% fixed copper content of 0.3%. Marked effect on properties of cast iron was noted by additions of copper. The quality of machined surface and tensile strength were improved significantly. The strength increased by 26% with 3% copper addition. Copper also reduced chilling effect and no chilling was observed in air cooled 3/8" section. The hardness of cast iron was improved without impairing machining property. Copper also improved corrosion resistance properties. Fractured surface of cast iron containing 0.6% Copper showed no rusting even after 3 months. It is recommended that the foundries in Pakistan make use of copper 'to counter quality problems in cast iron components.
Page(s):
61-66
DOI:
DOI not available
Published:
Journal: Pakistan Steel Journal, Volume: , Issue: , Year: 1985