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IF steel hot-dip galvanized steel plate with low delta r value and preparation method of IF steel hot-dip galvanized steel plate

A hot-dip galvanized steel sheet and hot-dip galvanizing technology, applied in the field of metallurgy, can solve problems that need to be further improved, and achieve the effects of low cost, simple preparation process, and low energy consumption production

Active Publication Date: 2021-07-09
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the average r value of the hot-dip galvanized steel sheet disclosed in the above patent is ≥1.30, and the anisotropy (Δr) is below 0.2, its stamping performance needs to be further improved to meet the existing market requirements for high-performance hot-dip galvanized steel sheet

Method used

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  • IF steel hot-dip galvanized steel plate with low delta r value and preparation method of IF steel hot-dip galvanized steel plate
  • IF steel hot-dip galvanized steel plate with low delta r value and preparation method of IF steel hot-dip galvanized steel plate

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preparation example Construction

[0016] The invention provides a method for preparing a low Δr value IF steel hot-dip galvanized steel sheet, comprising the following steps:

[0017] (1) Smelting process: according to the chemical composition of the IF steel, it is smelted into a slab, and the thickness of the slab is 200mm;

[0018] (2) Hot rolling process: heat the cast slab to 1110°C-1150°C, stay in the furnace for 200-260 minutes, and then carry out rough rolling. The rough rolling adopts 5-pass rolling, and the entire length of the phosphorus is removed, and the rolling process is put into use Insulation cover, the thickness of the middle slab after rough rolling is 39mm~43mm; after rough rolling, finish rolling is carried out, the starting temperature of finish rolling is 910°C~940°C, the temperature of finish rolling is 770°C~800°C; after finish rolling, it is naturally cooled to 610~ Coil at 650°C to obtain hot-rolled coils. At this time, the thickness of the steel plate is 3.5mm;

[0019] (3) Pickli...

Embodiment

[0036] The present invention will be further explained and illustrated by the following examples and comparative examples.

[0037] The following examples and comparative examples are smelted into slabs according to the chemical composition of Table 1, and the slab thickness is 200mm;

[0038] The billet is heated and rough rolled after 255 minutes of furnace time. The rough rolling adopts 5-pass rolling, and the phosphorus is completely removed in the whole length. The rolling process uses a heat preservation cover, and the thickness of the middle slab after rough rolling is 42.0mm;

[0039] After the rough rolling, the slab is subjected to finish rolling, and after the finish rolling, it is naturally cooled to the coiling temperature for coiling to obtain a steel plate with a thickness of 3.5mm;

[0040] After pickling the hot-rolled coils, they are cold-rolled into thin steel strips, and the cold-rolling reduction ratio is 80.0%;

[0041] Finally, the IF steel hot-dip galv...

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Abstract

The invention belongs to the technical field of metallurgy, and particularly relates to an IF steel hot-dip galvanized steel plate with a low delta r value and a preparation method of the IF steel hot-dip galvanized steel plate. The technical problem to be solved by the invention is to provide the IF steel hot-dip galvanized steel plate with the low delta r value and the preparation method of the IF steel hot-dip galvanized steel plate. The preparation method comprises the processes of smelting, hot rolling, acid rolling, annealing and hot galvanizing. As for the IF steel hot-dip galvanized steel plate, the IF steel hot-dip galvanized steel plate with higher strength and delta r lower than 0.12 is prepared by strictly controlling parameters in the processes of hot rolling, acid rolling and hot galvanizing.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a low Δr value IF steel hot-dip galvanized steel sheet and a preparation method thereof. Background technique [0002] With the rapid development of my country's national economic construction, the market's requirements for high-performance hot-dip galvanized steel sheets continue to increase. On the premise of ensuring other properties, hot-dip galvanized steel sheets with high stamping performance have become the goal pursued by various enterprises, especially in The automobile and home appliance industries have received great attention. Among them, in the existing literature on improving the stamping formability of hot-dip galvanized steel, the representative patents are: [0003] Patent CN103958712A discloses a high-strength hot-dip galvanized steel sheet with excellent deep drawability and its manufacturing method. The chemical composition of the steel sheet i...

Claims

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Application Information

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IPC IPC(8): C22C33/04C21D8/02C22C38/02C22C38/04C22C38/06C22C38/14C23C2/06C23C2/40
CPCC22C33/04C22C38/02C22C38/04C22C38/06C22C38/14C21D8/0205C21D8/0226C21D8/0236C21D8/0247C23C2/06C23C2/40
Inventor 周磊磊郑之旺王敏莉郑昊青
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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