Cailiao Baohu (May 2023)
Development and Application of 420 MPa Hot-Dip Galvanized Low Alloy High-Strength Steel Strip
Abstract
With the advancement of automobile lightweight, hot-dip galvanized low alloy high-strength steel strips are widely used in automobile structural parts or reinforcement due to their high yield strength and good forming, welding and anti-corrosion properties. Based on the research and development of hot-dip galvanized HC420LAD+Z steel strip in a steel plant, a low-cost and high-quality hot-dip galvanized HC420LAD+Z steel strip for automobile was developed from the aspects of process route design, reasonable control of chemical composition and optimization of key production process. The strip possessed good mechanical properties and adhesion to zinc layer, with the yield strength of 432~484 MPa, the tensile strength of 541~588 MPa, and the elongation A80 of 20.5~26.0%. Furthermore, the strip had batch stable production capacity, which provided a good reference for the industrial production of automotive high-strength steel.
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