原位合成TiC弥散强化铜合金工艺与性能

Process and Properties of In-situ Synthesis TiC Dispersion-strengthened Cu Alloy

采用热力学计算分析了在Cu-Ti-C体系中原位合成TiC弥散强化Cu合金的可行性;采用直接熔炼法原位合成了含lwt%TiC的弥散强化Cu合金,优化了工艺参数。采用XRD、SEM和EDS分析了合金的相结构及显微形貌。结果表明,TiC颗粒呈微团聚状分布(粒径0.5〜1|xm),分布均匀,与基体结合良好。制备的Cu-lwt%TiC合金的抗拉强度和导电率分别为258.5 MPa和76.5%IACS;与重熔态纯铜相比,合金的力学性能显著提高而导电性能下降。

The feasibility of in-situ synthesis of TiC dispersion-strengthening Cu alloy (Cu-TiC) in Cu-Ti ・C system wasanalyzed by thermodynamic calculation analysis. The dispersion・strengthened Cu alloy with lwt%TiC was in・situ prepared bydirect-arc melting method, and then the process parameters were optimized. The phase structure and microstructure of thealloy were analyzed by XRD, SEM and EDS . The results show that the distribution of TiC is in microaggregation (particlesize is 0.5-1 |xm) and in uniform distribution, which has a good bonding with the matrix. The tensile strength and conductivityof the prepared Cu- lwt%TiC alloy is 258.5 MPa and 76.5%IACS, respectively. Compared with that of the remelting purecopper, the mechanical properties of the alloy improve obviously and the conductivity decreases.