Hot galvanized high-strength steel with excellent Fe-Al alloy layer characteristics and manufacturing method thereof

A manufacturing method and hot-dip galvanizing technology, which are applied in the direction of superimposed layer coating, hot-dip coating process, metal material coating process, etc., can solve the problem of missing Fe-Al alloy layer, pitting, and different morphology of the alloy layer, etc. problem, to achieve the effect of uniform Fe-Al alloy layer, improved effective contact, and consistent morphology
CN110760771AActive Publication Date: 2020-02-07BAOSHAN IRON & STEEL CO LTD
6 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
BAOSHAN IRON & STEEL CO LTD
Publication Date
2020-02-07

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a hot galvanized high-strength steel with excellent Fe-Al alloy layer characteristics and a manufacturing method thereof. The hot galvanized high-strength steel comprises a substrate, a Fe-Al alloy layer and a galvanized layer in sequence, the substrate comprises the following chemical components of, in percentage by weight, 0.15-0.25 wt% of C, 1.00-2.00 wt% of Si, 1.50-3.00 wt% of Mn, less than or equal to 0.015 wt% of P, less than or equal to 0.012 wt% of S, 0.03-0.06 wt% of Al and the balance Fe and inevitable impurities. The loss area of the Fe-Al alloy layer is less than 5%, the Fe-Al alloy layer is uniform, complete and uniform in appearance, the hot galvanized steel plate obtained after hot galvanizing is good in appearance quality, the defects such as leakage plating, hemp spots, chromatic aberration and the like are avoided, and the hot galvanized high-strength steel is suitable for automobile structural parts and outer plates with higher requirementson surface quality and formability.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of hot-dip galvanized steel sheets, and in particular relates to a hot-dip galvanized high-strength steel with excellent Fe-Al alloy layer characteristics and a manufacturing method thereof. Background technique

[0002] When the steel plate is hot-dip pure zinc (without adding aluminum), the alloy layer formed by the Fe-Zn reaction is thick and brittle, resulting in poor processability, and the zinc layer is prone to fall off during bending deformation. In order to suppress the growth of Fe-Zn alloy layer in the modern continuous hot-dip galvanizing production line, a small amount of aluminum (about 0.2%) is added to the zinc solution. Since the chemical affinity of aluminum to iron is higher than that of zinc to iron, in A selective reaction occurs on the surface of the steel plate to form a thin Fe-Al alloy layer first, thereby inhibiting the diffusion of zinc.

[0003] At present, the demand for lightwe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More