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内氧化法制备的Cu-Al2O3合金的显微组织与性能
Properties and Microstructures of Cu-Al2O3 Alloy Produced by Internal Oxidation
【摘要】 利用内氧化法制备了Cu Al2 O3 弥散强化铜合金 ,并对其挤压态、冷拉态、退火态棒材进行了性能测试和显微组织结构分析。结果表明 :挤压后的棒材经 65 %和 90 %的变形量冷拉拔后 ,存在明显的加工纤维组织 ,σb 分别达 468和 495MPa ,相对电导率分别为 90 %和 89%IACS;1 0 30℃× 0 5h高温退火后再结晶现象并不明显 ,仍能保持较高的强度 ;且变形量越大 ,高温退火后强度下降越小 ;合金的拉伸断口表现为韧性与脆性的混合型断裂
【Abstract】 Al 2O 3 dispersion strengthened copper alloy is produced by the internal oxidation. Property measurements and microstructure observation of the alloy in hot extruded, cold drawn and annealed conditions are conducted. The results show that there exist obvious fibrous structures for the bars with 65% and 90% cold drawing reductions. Tensile strengths of the cold drawn bars are 468MPa and 495MPa, and electrical conductivities of the bars are 90% and 89%IACS, respectively. The cold drawn bars can retain high strength with slight recrystallization even after annealing for 0 5h at 1030℃. Tensile fracture of Cu Al 2O 3 indicates a mixed mode of ductile and brittle fracture.
【Key words】 internal oxidation; Cu Al 2O 3; dispersion strengthening; fibrous structure; strength; electrical conductivity;
- 【文献出处】 金属热处理学报 ,Transactions of Metal Heat Treatment , 编辑部邮箱 ,2003年01期
- 【分类号】TG146.11
- 【被引频次】72
- 【下载频次】419