Super-thick Q390GJC-Z35 steel plate for high-rise buildings and production method thereof

A Q390GJC-Z35, high-rise building technology, applied in the field of steel, can solve problems such as difficult production and special requirements for process equipment

Active Publication Date: 2011-05-18
NANYANG HANYE SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Q390GJC-Z35 steel for high-rise buildings with a thickness of more than 100mm cannot be produced due to the difficulty of production and special requirements for process equipment

Method used

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  • Super-thick Q390GJC-Z35 steel plate for high-rise buildings and production method thereof
  • Super-thick Q390GJC-Z35 steel plate for high-rise buildings and production method thereof
  • Super-thick Q390GJC-Z35 steel plate for high-rise buildings and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Through converter smelting, LF refining, vacuum refining, die casting pouring, ingot heating, rolling, controlled cooling, slow cooling, and heat treatment processes, the Q390GJC-Z35 finished steel with the chemical composition described in Table 1 below is obtained. The performance is shown in Table 4 and 5 below.

[0030] Chemical composition of table 1 embodiment 1 steel

[0031]

Embodiment 2

[0033] Through converter smelting, LF refining, vacuum refining, pouring, heating, rolling, controlled cooling, slow cooling, and heat treatment processes, Q390GJC-Z35 finished steel with the chemical composition described in Table 2 is obtained, and the process parameters and mechanical properties are as follows Table 4, 5.

[0034] Chemical composition of table 2 embodiment 2 steel

[0035]

[0036] The process route of the present invention: molten iron KR deep desulfurization→converter smelting→LF refining→VD vacuum treatment→cast ingot pouring→steel ingot heating→phosphorus removal→controlled rolling→controlled cooling→controlled straightening→off-line slow cooling→surface inspection →heat treatment→finishing→flaw detection→testing→judgment→qualified product storage.

[0037] Steelmaking composition: the chemical composition of the steel plate of the present invention is designed to use low carbon equivalent, Mn-Nb-V-Ni series ferrite + pearlitic steel, and the applie...

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Abstract

The invention discloses a super-thick Q390GJC-Z35 steel plate for high-rise buildings and a production method thereof. The super-thick Q390GJC-Z35 steel plate comprises the following chemical compositions in percentage by mass: less than or equal to 0.19 percent of C, less than or equal to 0.50 percent of Si, 1.00 to 1.60 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.003 percent of S, less than or equal to 0.20 percent of microalloyed elements (Nb+V+Ti+Ni), less than or equal to 0.050 percent of Als and the balance of Fe and residual elements. By reasonably designing the chemical compositions of multiple composite microalloy elements, the cleanliness of steel is ensured by a low frequency (LF)+vacuum degassing (VD) process, the level of the sum of various inclusions does not exceed 3.0, the grain size of the steel reaches 9.0-10.0 level through control rolling and control cooling and normalizing treatment, and the super-thick steel plate for the high-rise buildings, which has the thickness of more than or equal to 100mm and ensures flaw detection and mechanicals properties, is produced successfully through the effective implementation of the measures.

Description

technical field [0001] The invention relates to steel products, in particular to a Q390GJC-Z35 steel plate for super-thick high-rise buildings and a production method thereof. Background technique [0002] With the rapid development of my country's national economy, the development of steel for high-rise buildings is also developing in the direction of extra thick, extra wide and high performance. Steel for high-rise buildings has higher requirements on steel plate strength, toughness, yield ratio, and lamellar tear resistance. Currently, there are not many domestic steel plants that can produce steel plates for high-rise buildings with a thickness of more than 100mm. Q390GJC-Z35 high-rise building steel with a thickness of more than 100mm cannot be produced because of its difficulty in production and special requirements for process equipment. Contents of the invention [0003] In view of the above problems, the present invention provides a Q390GJC-Z35 steel plate for ul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/00C22C33/04C21C5/28C21C7/00C21D8/02
CPCY02P10/20
Inventor 杨东朱书成许少普张立新崔冠军唐郑磊李红洋张涛康文举徐昭庞林朱先兴
Owner NANYANG HANYE SPECIAL STEEL CO LTD
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