Quinary alloy coating material for high corrosion resistance coating steel products and manufacturing method thereof

Abstract

The invention relates to a five-component alloy plating material for coated steel products with high corrosion resistance and the manufacturing method thereof. The plating material contains a five-component alloy composed of Al, Si, Mg, Zn and a rare earth element, wherein the mass percentage of each component of the five-component alloy is as follows: Al: 45-69 percent, Si: 0.2-3 percent, rare earth element: 0.02-0.9 percent, Mg: 0.1-5 percent and Zn in balance. The manufacturing method comprises compounding the components at the given ratio and allowing the formation of Al-Si, Al-RE and Zn-Mg intermediate alloys, smelting in a smelting furnace at a smelting temperature of 750-800 DEG C, stirring in a non-contact manner, refining, slagging off, and casting to obtain an alloy ingot. The steel product coated with the inventive five-component alloy plating material is superior in high corrosion resistance, excellent fatigue resistance and strong ability of binding with matrix metals; and is widely used in the industries of household electronic appliances, construction materials and automobiles.

Description

Technical field

[0001] The invention relates to a five-element alloy plating material and a manufacturing method thereof, in particular to a five-element alloy plating material of high corrosion resistance plated steel materials and a manufacturing method thereof. Background technique

[0002] In the current domestic and foreign markets, due to the increasing demand for hot-dip galvanized or hot-dip galvanized alloy steel sheets in home appliances, building materials, automobiles and other fields, most manufacturers are still producing and using traditional hot-dip galvanized steel sheets (with ) Or a hot-dip galvanized steel sheet (strip) containing only 0.1 to 0.2% Al. This product has many defects, short service life, rust defects only about 10 years, and poor mechanical processing performance, the coating is easily damaged due to stretching, especially poor corrosion resistance under the condition of higher than room temperature. The joint between the coating and the base met...