| 摘要 |
PURPOSE:To provide a vibration-damping steel plate which has excellent press formability and is provided with extremely high vibration-damping power by forming an alloy layer to the boundary of the plating layer and base steel plate of a hot dipped steel plate consisting of a compsn. contg. a prescribed ratio of Al and consisting of the balance Zn. CONSTITUTION:The steel plate (e.g.; thin aluminum-killed steel plate) is subjected to hot dipping by using an Al-Zn hot dipping liquid contg. 0.4-60wt%, more preferably 16-28wt.%Al is used. The bath temp. in this case is made in a 500-700 deg.C range and is made higher by, for example, >=15 deg.C than the m. p. of the alloy layer to be formed at the boundary between the platiang layer and the base steel plate. The above-mentioned alloy layer is formed to 0.1-40mum, more preferably 3-40mum thickness. The most desirable thickness of the plating layer is a 10-300mum range. The steel plate produced in the above-mentioned manner is not spoiled in the workability of the base steel plate and has therefore the good press formability as the steel plate and has the extremely high bivration-damping characteristic from a room temp. up to a high temp. of about 300 deg.C. the high effect for reducing oscillation and noise is therefore obtd. if such steel plate is used in a position where the oscillation and noise are generated.
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