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Corrosion-resistant hot-rolled steel plate for street lamp post and preparation method thereof

A hot-rolled steel plate and corrosion-resistant technology, which is applied in the field of preparation of corrosion-resistant steel plates, can solve the problems of poor corrosion resistance of hot-rolled steel plates for street lamp poles, reduce corrosion interface expansion, improve corrosion resistance, and excellent plasticity The effect of toughness

Active Publication Date: 2020-04-24
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above analysis, the embodiment of the present invention aims to provide a corrosion-resistant hot-rolled steel plate and its preparation method, which solves the problem of poor corrosion resistance of the hot-rolled steel plate used for street light poles

Method used

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  • Corrosion-resistant hot-rolled steel plate for street lamp post and preparation method thereof
  • Corrosion-resistant hot-rolled steel plate for street lamp post and preparation method thereof
  • Corrosion-resistant hot-rolled steel plate for street lamp post and preparation method thereof

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preparation example Construction

[0043] In another aspect, the present invention provides a method for preparing a corrosion-resistant hot-rolled steel plate for street lamp poles, comprising the following steps:

[0044] Step 1: Put the billet into the heating furnace for heating;

[0045] The steel ingot or rough billet is placed in a heating furnace for heating, and the temperature of the uniform temperature section during the heating process is 1180°C-1250°C. According to the amount of alloy content, adjust the holding time, and the holding time in the uniform temperature section is 2 to 3 hours, so that the alloy elements are completely dissolved and then rolled.

[0046] Step 2: Rough rolling and finishing rolling of the heated billet;

[0047] The rolling temperature of the steel billet is 1130-1200°C, and the temperature range of the final rolling is 950°C-1000°C; it is rolled into a steel plate.

[0048] Step 3: Air-cool the steel plate after finish rolling to obtain a steel plate suitable for stre...

Embodiment 1

[0052] The thickness of the hot-rolled steel plate provided by the present invention is 2.75mm, and the composition of the steel plate is calculated according to weight percentage: C: 0.15%, Si: 0.20%, Mn: 1.6%, P: 0.01%, S: 0.003%, Cu: 0.5% , Cr: 0.5%, Ni: 0.11%, Sn: 0.001%, Sb: 0.02%, Ti: 0.02%, Re: 0.0002%, Ca: 0.0002%, and the balance is iron and unavoidable impurities.

[0053] The preparation method of the above-mentioned corrosion-resistant hot-rolled steel plate for street light poles includes the following steps:

[0054] Step 1: Put the billet into the heating furnace for heating;

[0055] Place the steel ingot or rough billet in a heating furnace for heating, the heating temperature is 1180°C, the heating time is 1.3h, and then rolling is carried out after heating.

[0056] Step 2: Rough rolling and finishing rolling of the heated billet;

[0057] The starting rolling temperature is 1135°C, and the finishing rolling temperature range is 950°C;

[0058] Step 3: Ai...

Embodiment 2

[0061] The thickness of the hot-rolled steel plate provided by the present invention is 4mm, and the composition of the steel plate is calculated according to weight percentage: C: 0.08%, Si: 0.30%, Mn: 0.6%, P: 0.03%, S: 0.025%, Cu: 0.6%, Cr: 1.0%, Ni: 0.3%, Sn: 0.01%, Sb: 0.015%, Ti: 0.001%, Re: 0.03%, Ca: 0.008%, and the balance is iron and unavoidable impurities.

[0062] The preparation method of the above-mentioned corrosion-resistant hot-rolled steel plate for street light poles includes the following steps:

[0063] Step 1: Put the billet into the heating furnace for heating;

[0064] Place the steel ingot or rough billet in a heating furnace for heating, the heating temperature is 1186°C, the heating time is 1.5h, and rolling is carried out after heating.

[0065] Step 2: Rough rolling and finishing rolling of the heated billet;

[0066] The starting rolling temperature is 1140°C, and the finishing rolling temperature range is 980°C; the thickness of the rolled stee...

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Abstract

The invention relates to a corrosion-resistant hot-rolled steel plate for a street lamp post and a preparation method thereof, and belongs to the field of preparation of corrosion-resistant steel plates. The steel plate and the method solve the problem of poor corrosion resistance of a hot-rolled steel plate in the prior art. The corrosion-resistant hot-rolled steel plate for the street lamp polecomprises chemical components of, by mass, 0.02-0.25% of C, 0.3-1.0% of Si, 0.6-2.0% of Mn, 0.005-0.15% of P, 0.001-0.025% of S, 0.02-0.8% of Cu, 0.5-1.0% of Cr, 0.1-1.5% of Ni, 0-0.02% of Sn, 0-0.02%of Sb, 0.0002-0.01% of Ca, 0.0005-0.03 % of Re, and the balance Fe and other unavoidable impurity elements. The steel plate and the method realize that the hot-rolled steel plate simultaneously has excellent corrosion resistance and good surface adhesion property.

Description

technical field [0001] The invention relates to the technical field of preparation of corrosion-resistant steel plates, in particular to a corrosion-resistant hot-rolled steel plate used for street lamp poles and a preparation method thereof. Background technique [0002] Street lamp poles are essential lighting facilities for cities. Street lamp poles are exposed to outdoors for a long time and are corroded when they come into contact with various harmful gases in the atmosphere, especially in humid and acid rain-prone coastal areas. Corrosion problems of street lamp poles more serious. The traditional light pole production method adopts Q235 hot-rolled plate cutting, bending, welding and other processes, then galvanized and sprayed. Among them, galvanizing is a traditional and effective method to prevent corrosion. However, with the strengthening of environmental protection supervision, the pollution caused by galvanizing has been paid more attention by light pole manufa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60C22C38/58C22C38/42C22C38/04C22C38/02C21D8/02
CPCC21D8/0205C21D8/0247C21D2211/005C21D2211/009C22C38/002C22C38/005C22C38/008C22C38/02C22C38/04C22C38/42C22C38/58C22C38/60
Inventor 陈颖李昭东柴锋杨忠民王慧敏曹燕光雍岐龙
Owner CENT IRON & STEEL RES INST
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