烧结温度对粉末冶金法制备M2052阻尼合金性能的影响∗

摘要

采用单质Mn、Cu、Ni、Fe粉末,通过反应烧结过程可制备 M2052合金.主要研究了烧结温度对密度、孔隙率和力学性能的影响,同时对烧结样品的相组成进行了分析.M2052合金在950℃烧结时基本为γ-MnCu固溶体,合金的密度为6．23 g/cm3,致密度为87．2％,抗弯强度达到了487 MPa,并具有良好的阻尼性能,不同频率下的阻尼性能表现稳定,损耗因子tanδ达到0．11~0．12.%M2052 damping alloy was prepared through reaction sintered method using high-purity simple sub-stance powders of Mn、Cu、Ni、Fe.Not only the effect of different sintering temperature on the density,porosity and mechanical properties of the sintering alloy was studied,but also the phase composition of the sintered sam-ple was analyzed.It is demonstrated that the M2052 alloy sintered at 1 223 K was essentiallyγ-MnCu solid solu-tion.The density of M2052 alloy sintered at 1 223 K was 6.23 g/cm-3 ,the relative density was 87.2% and the bending strength reach to 487 MPa.The results show that the damping capacity maintained at a very high level (tanδranges from 0.11-0.12)and the damping ability changes little as frequency increases from 0-100 Hz.