摘要
以雾化预合金黄铜粉末80Cu-20Zn为原料,研究了当压制压力分别为380,480,580,680及780MPa时,对粉末冶金黄铜件力学性能及显微组织的影响.实验结果表明:随着压制压力的增大,锌的挥发量降低;材料的密度、硬度及延伸率则随压制压力增大而增大;材料的抗拉强度随压制压力的增大先升高后下降,在压制压力680 MPa时抗拉强度达到最大值.在温度870℃下烧结的合金的延伸率比温度860℃下烧结的明显提高,但脱锌量增加,合金表面较粗糙.在压制压力为680MPa、烧结温度为870℃的条件下,试样的主要力学性能达到了日本工业标准JIS Z2550-2000的要求.
Pre-atomized 80Cu-20Zn brass alloy powders were used as raw materials. The effect of the compaction pressure （380, 480, 580, 680, 780 MPa） on mechanical properties and microstructure were studied.The results showed that with the increase of compacting pressure, the volatilization amount of zinc decreases. The density, hardness and elongation were increased with the increase of compacting pressure. The tensile strength increased at first and reached maximum at 680 MPa, then decreased. Compared the alloys sintered at 860 ℃ with that sintered at 870 ℃, the elongation of the latter was improved obviously, but zinc losses increase and surface become rough. The main mechanical properties of the samples have already reached the Japanese Industrial Standard JIS Z2550-2000 requirements.
出处
《材料研究与应用》
CAS
2008年第4期324-327,335,共5页
Materials Research and Application
关键词
粉末冶金黄铜
压制压力
力学性能
断口分析
powder metallurgy brass
compaction pressure
mechanical properties
fracture analysis
