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Role of carbon in the melting copper processes

Bydałek A. W.

Archives of Foundry Engineering

2011

Vol. 11, iss. 3 spec.

37--42

In the descriptions of technological processes melting and refining dominates principle of separate character behavior copper alloys in proportion to melting another alloys. Even, as in case of ferrous metals, about similar affinity to undesirable factors. The assumption of these opinions is the pose for main cause dissolubility of carbon in copper alloys and low relation as additional cause in majority these alloys poses as to oxygen. It results from this the row of conception as well as admitting to receive oxidative and the reducing conditions. Carbon in second method complies in direct contact with metal solution mainly . With analysis of thermodynamical factors it results that proprieties of copper and majority of her alloys responsiveness from oxygen at an angle of do not it run away from ferrous metals. The differences result with reason different range of temperatures of processing in liquid state mainly. In the work show, that opinions the leaning on it dissolubilities of carbon can be recognized (and only in approximation) only for copper about large purity. They do not concern it her mostly multiple alloys, at which the majority of alloy additions marks with possibility of creating carbides. Equally important the possibility of creating of carbides of accidental dirts is. The author's investigations show as on presence the even significant contents of carbon in some metallic phaze. The introduced in work analyses' and results of industrial tests investigations arrangement authorize acknowledgeable the reduction conditions diffusive the slag refinement from production the carbon - the nitrogen - the oxygen the for most rational. According to passed by author of model they come the perishable carbides from with easiness subject the dissociation in non - metallic electrolyte, contributively to actuation reductive influence. Introduced and investigation own arguments authorize to conclusion that the technological process of fusion of copper alloys does not it be to characterize in relation with separate guilds to different alloys and should to be to hold on valid in steel - makes principles.