(湖南大學(xué) 材料科學(xué)與工程學(xué)院, 長(zhǎng)沙 410082)
摘 要: 研究了軋制方式、 軋制溫度等對(duì)噴射共沉積7075/SiCp復(fù)合材料擠壓板材成形性能、 顯微組織和力學(xué)性能的影響。 結(jié)果表明： 擠壓變形可以提高7075/SiCp噴射共沉積坯的軋制變形性能， 平行于擠壓方向取樣并進(jìn)行交叉軋制可以制備出高質(zhì)量、 高性能的薄板； 軋制變形對(duì)擠壓過(guò)程中形成的SiC顆粒條帶狀不均勻分布有顯著的改善作用， 隨著軋制變形量的增加， SiC顆粒分布趨于均勻； 軋制過(guò)程中， SiC顆粒破碎， 尺寸明顯變小， 形貌呈鈍化趨勢(shì)； 7075/SiCp復(fù)合材料薄板(T6態(tài))的力學(xué)性能為： σs＝536.2MPa， σb＝670.2MPa， δ＝4.8%。
關(guān)鍵字: 7075/SiCp復(fù)合材料； 噴射共沉積； 軋制； 薄板
YUAN Wu-hua, TANG Shao-qiu, FU Jie-xing
（School of Materials Science and Engineering, Hunan University, Changsha 410082, China）
Abstract: The effects of rolling processing on the formability, microstructure and mechanical properties of the as-extruded spray co-deposited 7075/SiCp composite were investigated. The results show that the extruded thick sheet exhibits excellent formability along the extrusion direction. Cross rolling processing can enhance the formability and mechanical properties of the 7075/SiCp sheet. The rolling processing leads to the refinement of SiC particles and the distribution state. Furthermore, the optimal properties of the sheet are: yield strength 536.2 MPa, ultimate tensile strength 670.2 MPa, and elongation 4.8%, respectively.
Key words: 7075/SiCp composite; spray co-deposition; rolling process; sheet
