@article{oai:kansai-u.repo.nii.ac.jp:00011591,
 author = {中畑, 憲一郎 and 遠藤, 康利 and 吉川, 嘉宥 and 西本, 明生 and 赤松, 勝也},
 issue = {1},
 journal = {銅と銅合金 = Journal of Japan Institute of Copper},
 month = {Aug},
 note = {A direct consolidation of brass machined chips wastes has been attempted from a viewpoint of energy-saving and recyclability. A direct consolidation process from machined chips wastes has successfully been developed in our laboratory. So a free-cutting brass without Pb has been developed using this consolidation process in our laboratory by adding graphite powder and Cu2S powder as a substitution for Pb. However, ZnS formed during the extrusion processing disturbs the improvement of machinability of the extruded rod to which Cu2S is added. In this study, therefore, a surface of 6-4 brass machined chips was oxidized and dezincificated by heating in air in order to suppress the formation of ZnS. After extruding, the density and mechanical properties such as hardness, tensile strength and elongation of extruded rods decreased with an increment of Cu2S addition while an application of heat-treatment to machined chips suppressed a degree of drop in density and mechanical properties of extruded rods. Moreover, a machinability of extruded rods improved with increasing Cu2S addition and more obviously by heat-treatment.},
 pages = {254--257},
 title = {熱間押出し法を応用した鉛フリー快削黄銅の開発},
 volume = {49},
 year = {2010}
}