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PREPARATION METHOD FOR SUPERFINE HIGH DISPERSION SILVER-TUNGSTEN ELECTRICAL CONTACT MATERIAL

机译:超细高分散银钨电接触材料的制备方法

摘要

A preparation method for a superfine high dispersion silver-tungsten electrical contact material: premixing spherical foam tungsten powder and an activated element, mixing with a part of silver powder to prepare a framework powder, forming a framework of a certain porosity by means of initial pressure, performing vacuum sintering, and performing silver infiltration to obtain a compact superfine high dispersion silver-tungsten alloy. In the high evenness silver-tungsten electrical contact material prepared by means of the method, the two-phase grains of base silver and high melting point tungsten are fine and are distributed interactively and dispersively, while the components and morphology within each micro-area range of a contact surface change slightly during an arc erosion process, thus representing high and reliable arc burning performance. The process for the method is simple and is suitable for mass production, and the prepared product may be widely used in circuit breakers and contactors.
机译:一种超细高分散银钨电触头材料的制备方法:将球形泡沫钨粉与活性元素预混合,与一部分银粉混合制备骨架粉,通过初始压力形成一定孔隙度的骨架进行真空烧结,并进行银渗透,以获得致密的超细高分散银钨合金。在通过该方法制备的高均匀度的银钨电接触材料中,基础银和高熔点钨的两相晶粒细小并且相互作用且分散地分布,而在每个微区域范围内的成分和形态在电弧腐蚀过程中,接触表面的角度会略有变化,因此代表了高而可靠的电弧燃烧性能。该方法工艺简单,适合批量生产,所制备的产品可广泛用于断路器和接触器中。

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