Ultrasound application for detection of inhomogeneities in two-layer sheet

International Conference on Mechanical Engineering, Automation and Control Systems 2018

Afanasenko, V.G.^1 ; Boev, E.V.^1 ; Kulakov, P.A.^1

Ufa State Petroleum Technological University, 1, Kosmonavtov Street, Ufa

450062, Russia^1

关键词: Aluminium oxide;    Aluminum oxide powders;    Inhomogeneities;    Lead-tin;    Low melting;    Spherical inclusion;    Tin-solid solutions;    Two-layer;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/560/1/012003/pdf
DOI  :  10.1088/1757-899X/560/1/012003

来源: IOP

【 摘 要 】

The paper presents data on the influence of additives of the pre-treated aluminium oxide powder on the structure of cast lead-tin-based bronzes. Different quantities of the modifier, based on the superdispersed aluminum oxide powder, were added to the bronze melt. The studies have shown that addition of a small amount of aluminum oxide powder (0.07...0.25 %) allows modifying the microstructure of the obtained castings. This modification includes grain refinement, reduction of the matrix dendrites size of tin solid solution in copper, as well as formation of spherical inclusions of the low-melting phase - lead. In this case, the addition of such modifier influences weakly the morphology and the quantity of solid eutectoid inclusions based on electron compound Cu31Sn8.