The influence of modification by superdispersed powders on the lead-tin-base bronze structure

International Conference on Mechanical Engineering, Automation and Control Systems 2015

机械制造;无线电电子学;计算机科学

Semenkov, I.V.^1 ; Martyushev, N.V.^1 ; Popelyukh, A.I.^2 ; Alpeisov, A.T.^3 ; Drozdov, Yu.Yu.^1 ; Zykova, A.P.^1

Tomsk Polytechnic University, 30, Lenina ave., Tomsk

634050, Russia^1

Novosibirsk State Technical University, 20, Karka Marksa ave., Novosibirsk

630073, Russia^2

Kazakh National Research Technical University after K i Satpayev, 22a, Satpaev str., Almaty

051143, Kazakhstan^3

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

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/124/1/012114/pdf
DOI  :  10.1088/1757-899X/124/1/012114

学科分类：计算机科学（综合）

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 micro structure 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.