Zn-Al alloy having excellent high-speed deformation properties and its making method

Abstract

To provide a Zn-Al alloy which is excellent not only in static deformability but also in dynamic deformability, and which can be applied to large structures, and an efficient manufacturing method thereof. It is a Zn-Al alloy containing Zn: 30 to 99% (mass %, the same below), and the balance is composed of Al and unavoidable impurities. It is an α phase or α' phase with an average grain size of 5 μm or less β phase is finely dispersed in the structure, the maximum diameter of Al-based inclusions is 50 μm or less, and there are no pores with a circle equivalent diameter of 0.5 mm or more, and the macro-segregation of Al is less than 3.0%, and the micro-segregation of Al is less than 3.0%. Segregation is less than 2.0%.

Description

Technical field [0001] The Zn-Al alloy and the manufacturing method thereof of the present invention, particularly the Zn-Al alloy and the manufacturing method thereof having excellent deformation characteristics when the strain rate is high. Here, the Zn-Al alloy is a so-called effective metal for shock-absorbing and shock-absorbing devices that can follow shaking or skew caused by wind, earthquakes, and the like. Background technique [0002] Historically, as so-called vibration isolation and damping devices that can absorb wind load and seismic load strain or follow skew and sway, there are Pb damper, anti-vibration rubber, oil damper, and LYP ( Very low yield point steel) and other devices such as vibration damping steel plates. However, I. Because the anti-vibration rubber has the problem of aging over time, it is not suitable for vibration isolation and damping devices for buildings that require long-term durability. In addition, II. Because oil dampers require regular main...

AI Technical Summary

Problems solved by technology

Through the development of this technology, Zn-Al alloys of practical size showing excellent superplasticity at room temperature can be realized, however, there still remain problems to be solved in such Zn-Al alloys

That is, in the alloy developed above, although its strain rate is 10 -3 S -1 It is excellent in deformability at low speed (hereinafter referred to as "static deformability"), and exhibits good superplasticity at room temperature, but the strain rate is 10 -1 S -1 The deformation energy at high speed (hereinafter referred to as "dynamic deformation energy") is unstable when compared to the left and right.

In addition, this phenomenon becomes more prominent as the ingot becomes larger

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