MANUFACTURING METHOD OF AL-CR ALLOY DEPOSITED STEEL SHEET BY SINGLE SOURCE

摘要

The present invention relates to a method for producing an aluminum-chromium alloy deposited steel sheet excellent in corrosion resistance produced by a single evaporation source.;In the method of depositing an alloy layer of two metals on a steel sheet by a vacuum deposition method, when two evaporation sources are used, the alloy composition distribution of the deposition layer is distributed in an irregular and highly undulating composition, so that the deposition layer is not dense and corrosion resistance There is a problem with this falling.;In the method of manufacturing an aluminum-chromium alloy plated steel sheet, aluminum and chromium are alloy compositions of chromium content of 1.8 to 11% by weight, and are put in one evaporation source, and they are simultaneously irradiated with an electron beam and heated to evaporate to a substrate temperature of 200 to 300 ° C. Of aluminum-chromium alloy plated deposited steel sheet by vacuum deposition of an aluminum-chromium alloy plated layer in an ion plating method using a voltage of 100 to 1000 V applied to an aluminum-chromium alloy plated layer in a range of 10 to 20 g / m ² . When the steel sheet is manufactured by the method, surface smoothness and corrosion resistance are better than those of using two evaporation sources.