Zr based amorphous alloy and manufacturing method thereof

Abstract

The invention provides a Zr based amorphous alloy and a manufacturing method thereof. The components of the Zr based amorphous alloy accord with the following chemical formula (I): ZraCubAlcMdRe (I), wherein M represents one or more of Ni, Fe, Co, Mn, Cr, Ti, Hf, Nb, Be, Si and Ca, R represents one or more of Sc, Y and Er, a, b, c, d and e are atomic percentages, a is greater than or equal to 40 and smaller than or equal to 70, b is greater than or equal to 15 and smaller than or equal to 35, c is greater than or equal to 5 and smaller than or equal to 15, d is greater than or equal to 5 and smaller than or equal to 15, e is greater than 0 and smaller than 0.3, and a+b+c+d+e=100. The manufacturing method of the amorphous alloy comprises the steps of: a) weighing metal raw materials containing Zr, Al, Cu, M and R respectively according to composition of the chemical formula (I) and conducting mixing to obtain a mixed material; b) placing the mixed material in a smelting furnace to undergo smelting so as to obtain a melt, with the burning loss amount of the R element being 5%-100% in terms of atomic percentage; and c) subjecting the melt to casting, thus obtaining the Zr based amorphous alloy. According to the manufacturing method, the dosages of rare earth elements are significantly reduced, and the amorphous characteristics and mechanical properties of the amorphous alloy are ensured.

Description

technical field [0001] The invention relates to a zirconium-based amorphous alloy and a preparation method thereof. Background technique [0002] Amorphous alloys appeared in the 1960s. The initial amorphous alloys are difficult to be practically applied because the critical size (the largest size for forming amorphous crystals) can only reach the micron level. However, material properties such as high strength, high hardness, corrosion resistance, and excellent high-temperature fluidity have attracted a large number of scientific researchers and have been widely studied. Amorphous alloys with large critical sizes and suitable for industrial production have been continuously developed. The critical size is gradually increasing. From the micron level to the millimeter level and even to the centimeter level. Generally speaking, amorphous alloys whose critical cooling rate is less than 500°C / s and whose critical size is greater than 1 mm are called bulk amorphous alloys. The...

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Problems solved by technology

[0007] Since the content of impurity gases or oxides and impurities in the alloy melt is usually not clear, in the prior art, the added rare earth elements are very high, and the content of rare earth elements is as high as 10% (refer to Patent Document 3), which greatly increases the material The cost of production, or the addition of insufficient rare earth elements or insufficient reaction between the added rare earth elements and harmful elements will lead to a significant reduction in the critical size of amorphous alloys

In addition, rare earth elements are usually expensive and are rare resources in the country, and their prices fluctuate drastically due to market influences

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