锌合金快速模具表面改性技术

Surface Modification Technology for Zinc-alloy Rapid Tooling

锌合金熔点低、喷涂成形性能好,可以直接在原型表面进行电弧喷涂快速制造模具,提高模具的制造精度。但是,锌合金制造的模具硬度低、耐磨性差,型腔很容易遭受破坏,研究复合电刷镀在锌合金模具表面的强化改性技术,考察镀层与喷涂层的结合机理,揭示模具快速成形与表面改性相统一的质量控制规律,使具有自主知识产权的经济和优质化的模具改性技术得到大力推广。

Zinc-alloy has low melting point and is easy to spray forming which can be sprayed directly on the production surface to fabricate a mould with high precision by arc spraying.But the zinc-alloy mould has the disadvantage of easy invalidation due to its relatively low hardness and poor anti-wear property.In this paper,the surface modification of zinc-alloy tooling by composite electro-brush plating is researched.The joining mechanism between the plating film and sprayed coating is investigated.It is revealed that the law of quality control on the unification of rapid tooling and surface modification.A new economical and high quality surface modification technology related to moulding with independent intellectual property right is developed.