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

An alloy and excellent technology, applied in the field of Zn-Al alloy and its manufacturing, can solve problems such as unstable deformation energy, and achieve the effect of excellent static deformation energy and dynamic deformation energy.

CN101194035AInactive Publication Date: 2008-06-04KOBE STEEL LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2008-06-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention provides a Zn-Al alloy, which is excellent in static deformability, as well as in dynamic deformability, and can be applied to a large structure, and a process useful for producing the Zn-Al alloy. The Zn-Al alloy comprises Zn: 30 to 99% (% by mass; the same shall apply hereinafter) with the balance consisting of Al and unavoidable impurities, wherein the Zn-Al alloy has a texture comprising a ss phase finely dispersed in an a phase or a' phase having an average grain diameter of not more than 5 [mu]m, the maximum diameter of Al-based inclusions is not more than 50 [mu]m, and, at the same time, pores having a equivalent circle diameter of not less than 0.5 mm are absent, and the macrosegregation of Al is less than 3.0%, and the microsegregation of Al is less than 2.0%.
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Description

technical field

[0001] The Zn-Al alloy and its manufacturing method of the present invention, particularly a Zn-Al alloy excellent in deformation characteristics at a high strain rate, and its manufacturing method. Here, the Zn-Al alloy is a so-called effective metal for shock-absorbing and shock-absorbing devices that can follow vibrations or skews caused by wind, earthquakes, and the like. Background technique

[0002] Conventionally, as the so-called shock isolation and shock absorbing devices that can absorb the strain of wind loads and earthquake loads, or follow skew and shaking, there are dampers made of Pb, anti-vibration rubber, oil dampers, and LYP ( Very low yield point steel) and other devices such as vibration-damping steel plates. However, I. Because anti-vibration rubber has the problem of aging over time, it is not suitable for anti-vibration and vibration-absorbing devices for buildings that require long-term durability. In addition, II. Because oil damper...

Examples

Embodiment l

[0087] [Manufacture of Zn-Al alloy]

[0088] The Zn-22%Al alloy melt was casted using an iron mold or a copper mold with a cross-sectional shape of 200mm long×350mm wide, under both air-cooled or water-cooled conditions. In addition, a part (No. 12 of Table 1 described later) was continuously casted using a water-cooled copper mold with a cross-sectional shape of 200 mm. In this way, an ingot (ingot size: 180 kg) of Zn-22%Al (total impurity amount: 0.5% or less) in which alloy components tend to undergo macrosegregation was obtained.

[0089] In addition, the cooling behavior of the ingot was measured by installing a thermocouple at a position 300 mm from the bottom surface of each ingot (cross-sectional center position). An example of the temporal change (cooling curve) of the ingot internal temperature is shown in FIG. 4 . Based on the above cooling curve, the cooling rate (average cooling rate 1) in the solid-liquid two-phase domain (425-375°C) and the cooling rate (avera...