中文摘要：

利用真空热压烧结技术，在45^#钢基体上制备高铝青铜合金涂层．采用SEM、EDS、XRD、显微硬度计和万能力学试验机对涂层和界面的微观组织、涂层相结构、元素分布、显微硬度以及界面结合强度进行表征，研究涂层制备工艺参数对制备的涂层组织和力学性能的影响．结果表明：合金涂层的适合烧结温度为900℃，合适的粉体粒度为--300目的细粉，该参数下烧结时涂层显微硬度可达392．6HV，抗压强度以及抗弯强度分别为1225．8MPa和791．3MPa；烧结时加入钎焊剂后使涂层致密化程度提高、均匀细化程度增加，显微硬度可达383．5-409．4Hv，涂层-9基体形成结合带，结合强度为38．2MP8，能谱分析表明，界面结合处发生元素扩散，同时生成新相～＆和№玫

英文摘要：

The coating of high-aluminum bronze alloy was prepared on 45 steel with vacuum hot pressing technology. SEM, EDS, XRD, micro-hardometer, and universal mechanical tester were used to characterize the microstructure, phase structure, element distribution, microhardness and interface bonding strength. The effect of process parameters on the microstructure and mechanical properties of the coating preparation was investigated. The results showed that the appropriate sintering temperature was 900℃, the appropriate powder particle size was --300 mesh, the microhardness of coating could reach 392. 6 HV, the compressive strength and bending strength was 1 225. 8 MPa and 791. 3 MPa, respectively. After adding silver brazing flux, a compacted and refined microstructure was formed and the micro-hardness reached 356. 5＂-409.4 HV. The bonding strength of formed combination area of coating and substrate was 38. 2 MPa. It was showed by EDS analysis that the element diffusion occurred on the interface, meanwhile A1Bz and FeaB new phases were formed.