Cu-Sn-Ni-Sn-Zn系銅合金の熱間圧延性について

概要

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It was m~inly studied using laboratory hot rolling mill that edge cracks ofhot rolling plates of CDA Copper Alloy C64740 CCu-Sn-Ni-Si-Zn system copperalloy) occur during hot rolling at high temperatures from 1073 to 1173K.One cause of the cracks results from sulfur contamination, which is solvableto red uce sulfur or generate the sulfides of MnS and MgS by adding manganeseand magnesium in melting and casting, in short, by the scavenging effect.Another comes from silicon increase in the alloy, which is basically important,strengthens the matrix as compared with the grain boundary at the hightemperatures, and brings about intergranular fracture due to the concentrationof hot rolling stress to the grain boundary.An experimental method of 1 pass· 85% rolling reduction is very effectiveto evaluate the shortness of the alloy at the high temperatures whose resultsare consistent to the commercial prouucLion's.
秋田大学の論文