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A Cu precipitation-enhanced high-strength refractory and corrosion-resistant steel and its manufacturing method

A manufacturing method and technology of corrosion-resistant steel, which is applied in the field of steel for building structures, can solve the problems of prolonging the construction period, increasing construction costs, and increasing construction difficulty, etc., and achieves excellent fire resistance, enhanced fire resistance, and excellent marine atmospheric corrosion resistance.

Active Publication Date: 2020-03-20
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of anti-corrosion, fire-resistant coatings and fire-resistant structures not only increases the difficulty of construction, prolongs the construction period, increases construction costs, but also causes pollution to the environment

Method used

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  • A Cu precipitation-enhanced high-strength refractory and corrosion-resistant steel and its manufacturing method
  • A Cu precipitation-enhanced high-strength refractory and corrosion-resistant steel and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0044] Example 1-1: Heating the cast slab to 1180°C, holding time 2h, the rough rolling opening temperature is 1180°C, after 3 passes of rough rolling, the rough rolling final rolling temperature is 1095°C, the finishing rolling opening temperature is 953 ℃, the finishing temperature of finishing rolling is 883℃, after 5 passes of finishing rolling, the thickness of the steel plate is rolled to 20mm; the steel plate is cooled to 483℃ in laminar flow at a cooling rate of 20℃ / s, and then air cooled to room temperature.

Embodiment 1-2

[0045] Example 1-2: Heating the cast slab to 1180°C, the holding time is 2h, the rough rolling opening temperature is 1180°C, after 3 passes of rough rolling, the rough rolling final rolling temperature is 1065°C, and the finishing rolling opening temperature is 955 ℃, the finishing temperature of finishing rolling is 881℃, after 3 passes of finishing rolling, the thickness of the steel plate is rolled to 30mm; the steel plate is cooled to 481℃ in laminar flow at a cooling rate of 21℃ / s, and then air cooled to room temperature.

Embodiment 2-1

[0046] Example 2-1: Heating the cast slab to 1180°C, the holding time is 2h, the rough rolling opening temperature is 1180°C, after 3 passes of rough rolling, the rough rolling final rolling temperature is 1055°C, and the finishing rolling opening temperature is 952 ℃, the finishing temperature of finishing rolling is 881℃, after 6 passes of finishing rolling, the thickness of the steel plate is rolled to 16mm; the steel plate is cooled to 447℃ in laminar flow at a cooling rate of 26℃ / s, and then sent to 450℃ for heat preservation After holding the furnace for 0.5h, the furnace is cooled to 200°C, and finally air cooled to room temperature after being discharged from the furnace.

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Abstract

The invention discloses Cu precipitation enhancement type high-strength fire-resistant corrosion-resistant steel and a manufacturing method thereof, and belongs to the technical field of steel for architectural structures. Low-C design is adopted, Ni and Cu anti-corrosion element alloying is adopted, and fire resistance is jointly guaranteed through indoor temperature bainite structure control andnanometer Cu particle high temperature precipitation after meeting fires mainly. The Cu precipitation enhancement type high-strength fire-resistant corrosion-resistant steel is composed of, by weight, 0.01%-0.03% of C, 0.10%-0.30% of Si, 0.10%-0.50% of Mn, 3.00%-5.00% of Ni, 0.80%-1.50% of Cu, 0.010%-0.030% of Ti, 0.015%-0.035% of Al, less than 0.015% of P, less than 0.010% of S and the balance Fe and inevitable impurities. According to the manufacturing method, converter or electric furnace smelting is adopted, and continuous casting or die casting is adopted for casting. The high-strength fire-resistant corrosion-resistant steel can be used for steel structure building.

Description

Technical field [0001] The invention belongs to the technical field of steel for building structures, and particularly relates to a Cu precipitation-enhanced high-strength refractory and corrosion-resistant steel and a manufacturing method thereof. Background technique [0002] Steel structure buildings have the advantages of light weight, fast construction, large space, comfortable and beautiful appearance. However, first of all, ordinary structural steel has poor weather resistance and often needs to be painted with anti-corrosion coatings, especially in the harsh marine atmospheric corrosion environment of coastal or islands and reefs. The anti-corrosion maintenance of steel structure buildings is costly and even difficult. Secondly, ordinary steel structure has poor fire resistance, the yield strength above 350℃ drops sharply, and the high temperature load capacity is insufficient. Therefore, fire safety requires additional fire protection structure or fire protection coatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/08C22C38/16C22C38/14C22C38/06C21D8/02
CPCC21D8/0205C21D8/0226C21D8/0247C21D2211/002C22C38/02C22C38/04C22C38/06C22C38/08C22C38/14C22C38/16
Inventor 曹燕光李昭东王鑫雍岐龙陈润农陈颖王慧敏杨忠民沈俊昶
Owner CENT IRON & STEEL RES INST