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Industrial atmospheric corrosion resistant steel bar and preparation method thereof

An atmospheric corrosion and corrosion-resistant technology, applied in the field of industrial atmospheric corrosion-resistant steel bars, can solve the problems of unsatisfactory anti-corrosion effect, difficult construction and high cost, and achieve the effect of good industrial general corrosion resistance.

Inactive Publication Date: 2018-07-17
福建三宝钢铁有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the corrosion of steel bars, anti-corrosion technologies such as stainless steel bars, galvanized steel bars, epoxy resin coated steel bars, cathodic protection, and rust inhibitors have successively appeared at home and abroad, and relevant standards have been formulated to delay the corrosion of steel bars to a certain extent. Start time, but there are disadvantages such as high cost, difficult construction and unsatisfactory anti-corrosion effect

Method used

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  • Industrial atmospheric corrosion resistant steel bar and preparation method thereof
  • Industrial atmospheric corrosion resistant steel bar and preparation method thereof
  • Industrial atmospheric corrosion resistant steel bar and preparation method thereof

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Embodiment Construction

[0034] The technical route adopted in the present invention: 70-ton ultra-high-power electric furnace—LF ladle refining—tapping deoxidation alloying—argon blowing treatment—4 machines, 4 streams, 165 billet continuous casting—regenerative walking heating furnace—18 racks Twist-free tandem rolling unit—water cooling—finishing—packing—storage.

[0035] (1) Adopt electric furnace hot charging molten iron process, the proportion of molten iron and scrap steel is 50%, energize and melt, strengthen oxygen supply and decarburization, control the slagging process, dephosphorize, remove harmful impurities in steel, and reach the tapping condition (molten steel temperature: 1630~1650℃), slag-free tapping at the eccentric furnace bottom, and alloying in the ladle. According to the calculated alloy addition amount, add low-carbon ferrochrome, copper plate, molybdenum iron, nickel plate, vanadium nitrogen, phosphorus ferro, into the ladle in advance, and during the tapping process of the e...

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Abstract

The invention discloses an industrial atmospheric corrosion resistant steel bar and a preparation method thereof. The steel bar comprises, by mass, 0.15-0.20% of C, 0.40-0.60% of Si, 1.30-1.60% of Mn,0.070-0.130 of P, less than or equal to 0.030% of S, 0.40-0.55% of Cr, 0.25-0.35% of Cu, 0.40-0.60% of V, 0.15-0.25% of Ni, and 80-140 ppm of N. The steel bar can effectively prevent industrial atmospheric corrosion.

Description

technical field [0001] The invention relates to a steel bar resistant to industrial atmospheric corrosion. Background technique [0002] Sulfur-containing pollutants are the main air pollution medium, and the corrosion rate of steel increases with the increase of SO2 content in the air. Buildings, bridges or railways have been exposed to the atmospheric environment for a long time, and the steel materials in them have been corroded by air pollution, which shortens the service time, creates potential safety hazards, and threatens the development of the national economy and people's lives. The industrial atmosphere corrosion-resistant steel bar has the advantages of reducing loss, saving resources and labor, and being convenient to use. The development and research of new industrial atmospheric corrosion-resistant steel bars has practical significance for facility safety and production development. Different types of industrial atmospheric corrosion-resistant steel bars have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C22C38/42C22C38/02C22C38/04C22C33/04B21C37/04
CPCC22C38/46B21C37/04C22C33/04C22C38/02C22C38/04C22C38/42
Inventor 吴长锡唐名标陈贵和熊科林李艳平
Owner 福建三宝钢铁有限公司
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