학술논문

The Properties of Metallic Spray Coatings by Wire Explosion / 導線放電爆発による溶射被膜の性質について
Document Type
Journal Article
Source
日本金属学会誌 / Journal of the Japan Institute of Metals and Materials. 1969, 33(5):576
Subject
Language
Japanese
ISSN
0021-4876
1880-6880
Abstract
The present report is related to the newly developed metallic spraying method by means of wire explosion.In this report the surface roughness, hardness, component, structure and adhesion strenghth, etc. of spray coating of various metals by this spray method are investigated.The results obtained are summarized as follows:(1) The surface of spray coatings is smooth and RMS is 1∼5 μ. It shows small value as compared with RMS of 75∼125 μ in plasma flame spray.(2) The hardness of spray coating of cemented carbides is lower than that of base materials.But in other case, the hardness of spray coatings is higher.(3) The components of cemented carbides (WC-Co system) in spray coating mainly consist of W2C and Co. The carbon content in a steel shows a decrease of about 30% after spraying.(4) The adhesion strength is high, but it depends on the combinations of spray metals and base metals. In the case of using Cu as base materials, the adhesion strength is not so high. In the case of mild steel and brass it is as large as more than 200 kg/cm2.(5) By optical microscopy and electron microscopy, it is ascertained that the spray coatings are comparatively compact, and adhesion is satisfactory.