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利用固-液复合法制备了一种预埋纯镍管的新型Cu/Ni水套材料,采用金相、扫描电镜、显微硬度和剪切强度测试,重点分析不同浇注温度下铸铜水套材料的基体与预埋镍管的界面结合特性,如界面原子扩散行为、显微硬度、结合强度等。结果表明,在1 100℃、1 200℃和1 300℃3个浇注温度下,随着浇注温度的升高,界面处扩散层厚度增加,显微硬度增大;当浇注温度过高(1 300℃)时,镍管表面易于附着铜基体中析出的微小气孔,降低界面的结合强度,在1 200℃浇注温度下获得了约为162MPa的最佳界面剪切强度。
A new type of Cu / Ni water jacket material embedded with pure nickel tube was prepared by solid-liquid complex method. The metallurgical, scanning electron microscopy, microhardness and shear strength tests were carried out to analyze the effects of different water temperatures The interface between the substrate of the material and the embedded nickel pipe is characterized by the atomic diffusion behavior of the interface, the microhardness and the bonding strength. The results show that with the increase of pouring temperature, the thickness of diffusion layer increases and the microhardness increases with the increase of pouring temperature at 1 100 ℃, 1 200 ℃ and 1 300 ℃. When the pouring temperature is too high ℃), the surface of the nickel tube is easy to adhere to the micro-pores precipitated in the copper matrix to reduce the bonding strength of the interface, and the best interfacial shear strength of about 162 MPa is obtained at the pouring temperature of 1 200 ° C.