Preparation technique of phase transformation induced plasticity hot galvanizing steel plate

Abstract

The invention relates to a preparation technique of a phase transformation induced plasticity hot galvanizing steel plate, which comprises the steps of: putting the steel plate at the temperature of 510-530 DEG C into a zinc pot, and then carrying out hot galvanizing in hot-dip galvanizing liquid at the temperature of 460-490 DEG C for 3-15 seconds, wherein the galvanizing liquid comprises the components by weight percent: 0.20-0.24% of Al, 0.01-0.10% of Ni, the balance of Zn and unavoidable trace impurities; the steel plate comprises the components by weight percent: 0.10-0.20% of C, less than or equal to 0.60% of Si, 0.50-1.00% of Al, 1.30-2.0% of Mn, 0.10-0.30% of Nb, and one or more element(s) selected from 1.0-2.0% of Cr, 0.01-0.05% of Mo, 0.01-1.0% of V, 0.005-0.1% of Ti, 0.01-0.10% of Ni and 0.003-0.01% of B; and the steel plate also comprises less than or equal to 0.015% of P, less than or equal to 0.015% of S, the balance of Fe and the unavoidable impurities. The preparation technique is easy to popularize and apply, and the prepared phase transformation induced plasticity hot galvanizing steel plate is good in phase transformation induced plasticity, galvanizing performance and adhesion property of a zinc layer.

Description

technical field [0001] The invention belongs to the field of iron and steel production, and in particular relates to a preparation process of a phase change-induced plasticity hot-dip galvanized steel sheet. Background technique [0002] Transformation-induced plasticity steel (TRIP) has good formability, rigidity, collision energy absorption capacity, weldability, and fatigue durability. As a structural component of an automobile, it can reduce the weight of the automobile, enhance the impact resistance of the automobile, and save material production and use. energy consumption, reduce environmental pollution, and have economic, ecological and social benefits. Si oxides are easy to form on the surface of typical CMnSi-based TRIP steels, causing serious surface defects, resulting in poor wettability, and it is difficult to perform hot-dip galvanizing to achieve the purpose of corrosion resistance. The patent application number is US20060489227 and the publication number is ...

AI Technical Summary

Problems solved by technology

Si oxides are easy to form on the surface of typical CMnSi-based TRIP steels, causing serious surface defects, resulting in poor wettability, and it is difficult to perform hot-dip galvanizing to achieve the purpose of corrosion resistance.

The patent application number is US20060489227 and the publication number is US2007 / 0020478A1 A hot-dip galvanized steel sheet of phase change induced plastic steel by Korea Hyundai Hysco Co., Ltd., the patent application number is 02800375.6 and the publication number is CN1457371A High-strength heat of Japan Steel Tube Co., Ltd. Zinc steel plate and its manufacturing method, the patent application number is 200810119818.X and the publication number is CN101353761A Beijing University of Science and Technology, a high-strength cold-rolled hot-dip galvanized TRIP steel plate and its preparation method do not provide a coating phase structure with good adhesion and its control method

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