Galvanized steel sheet coating material and its production method

Abstract

The invention discloses a coating material and producing method of galvanized steel sheet, which comprises the following elements: Al 50%-60%, Zn 38%-47%, SiO 5%-3%, RE 0. 05%-0. 3%, wherein the producing method comprises the following steps: adding 50%-60%Al in founding furnace; heating-up to 795-805deg. c; adding in 0. 5-3 percent Si; mixing equably; heating-up to 845-855deg. c and joining 0. 05-0. 3% RE; stirring equably; heating-up to 860-880deg. c and adding in 38-47 percent Zn; mixing evenly and placing for 35min. The invention improves corrosion resistance and fire resistant property of coated rolled steel.

Description

technical field

[0001] The invention relates to a metal material, in particular to a coating material for special galvanized steel sheets. Background technique

[0002] In the prior art, the galvanized sheet used is mainly a hot-dip galvanized steel sheet or a hot-dip galvanized steel strip. The coating material of this product is usually 100% metal zinc Zn, and the metal zinc Zn is plated as the coating material on the The role of the steel surface is: 1. Improve the corrosion resistance of the steel and prolong the service life of the steel. 2. Improve the high temperature resistance (300°C) and corrosion performance of steel to expand the application range of steel plates (strips). 3. The coating composed of plating materials is not damaged under the conditions of stretching and deformation processing, so as to improve the mechanical processing performance of the steel plate (strip). 4. The coating composed of plating materials has a strong bonding force with the basic ...