마이크로 펄스 플라즈마 용접과 은땜 기법을 활용한 백동 기물 제작 연구

Abstract

This study aims to produce nickel silver objects in a more efficient way by suppressing deformation of the surface that occurs during the process of the thermal joining of the nickel silver plates, a representative material of contemporary metal craft. It is highly difficult to process the nickel silver, an alloy of copper and nickel, in a three dimensional manner since the surfaces of it can be severely twisted and its connected parts can be easily widened compared to the other nonferrous metal during the course of thermal joining. Thus, this study conducted research on the application method for the micro pulse plasma welding and soldering technique, through which the metal craft artists can process the thermal joining of nickel silver plates in easier and more effective way while dealing with such weaknesses. As a result, a joining was successfully completed by forming a certain gap in the connected part and spreading the intermediate metal to the crystal structure of the surface of the contact which is to be bound with bead bundles. This is an attempt for the confluent joining of the nickel silver in which the isolated fusion, a characteristic of the melting technique, is combined with the spread of crystal structures, an advantage of the soldering technique, and a capillary phenomenon. The scope of the study covers the C7521, a generally used material by the metal craft artists, produced with the alloy ratio of copper 65%, nickel 18%, and Zinc 17%. It went through a demonstration process by selecting the experiment results with the plate with a thickness of 0.5mm and 1.0mm of the experiments in the 6 phases distinguished according to the thicknesses. The manner of marking the experiment results of the nickel silver plate specimen welding and the production process of the nickel silver objects with the application thereof in the objective figures with the photographs was adopted as the study method. The study results suggest the suitable method for metal craft artists to move forward based on the feasibility and usefulness of the joining method that has been derived from the experiment process.