TiC_P/7075铝基复合材料的半固态触变成形  

Semi-solid Thixo-forming of In-situ Reactive Spray Formed TiC_p/7075Al Matrix Composites

作　　者：呼努斯图[1] 许萍[2] 刘慧敏[2] 

机构地区：[1]内蒙古师范大学物理与电子信息学院 [2]内蒙古工业大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2009年第4期331-333,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50661003)

摘　　要：用原位反应喷射沉积法制备TiCP/7075铝基复合材料,并进行半固态触变成形试验,研究了TiCP/7075铝基复合材料的半固态触变成形性及其成形后的微观组织与力学性能。结果表明,该材料具有良好的半固态触变成形性,在成形压力仅为20～25MPa的条件下,就能够进行半固态触变成形。在625℃进行半固态触变成形后,其组织仍能保持均匀的等轴晶特征,平均晶粒尺寸为30～40μm;半固态触变成形试件经T6处理后其硬度HRB为82～85。Semi-solid thixo-forming of in-situ reactive spray formed TiCp/7075 aluminum matrix composites was carried out. Thixoformability of in-situ reactive spray formed TiCp/7075 aluminum matrix composites, and microstructure and mechanical properties of the thixoformed products were investigated. It is found that the composites exhibit desirable semi-solid thixoformability, which can be performed semi-solid thixoforming with pressure at 20~25 MPa. Uniformly distributed equiaxed grain in the microstructure with average grain size in 30~40 μm can be still observed with semi-solid thixo-forming at 625 ℃. The hardness of the thixoformed composites reaches 82~85HRB after T6 heat treatment.

关 键 词：半固态触变成形 原位反应喷射沉积 TiCp/7075铝基复合材料 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG249.9[金属学及工艺—金属材料]