| 摘要 |
PURPOSE:To reduce the weight of a device, to decrease the machining man- hours, and to improve resistance to wear, by a method wherein a housing body is cast in an aluminium alloy, and iron-plating is applied on the inner surface for sliding formed inside the housing body. CONSTITUTION:The body 1 of a valve housing is die cast in an aluminium alloy in one body. Iron-plating is applied on the inner surface 4 for sliding to form an iron-plated layer 5. This enables reduction of the weight of a device, decrease of the machining man-hours, and sharp improvement of resistance to wear.
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