Low-alloy high-strength structural-steel extra-thick board Q460C and production method thereof

A low-alloy, high-strength, production method technology, applied in the field of steel production, can solve the problems of low guarantee of flaw detection, single heavy, thick specifications, etc.

Active Publication Date: 2011-05-04
NANYANG HANYE SPECIAL STEEL CO LTD
View PDF2 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are not many domestic steel mills that can produce the known Q460C extra-thick plate, and there are few researches and reports at home and abroad.
In particular, Q460C steel plate, a low-alloy high-strength structural steel with a th

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low-alloy high-strength structural-steel extra-thick board Q460C and production method thereof
  • Low-alloy high-strength structural-steel extra-thick board Q460C and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Through KR desulfurization of molten iron, converter smelting (argon station), LF refining, VD vacuum degassing (Ca treatment), die casting pouring, ingot heating, descaling, 3800 rolling mill rolling, ACC cooling, straightening, steel plate stack cooling, normalization The pyrothermal treatment process obtains Q460C finished steel with the chemical composition described in Table 1 below, and its process parameters and mechanical properties are shown in Table 3 and 4 below.

[0023] Table 1: Chemical Composition of Steel in Example 1

[0024] C％

Embodiment 2

[0026] Through KR desulfurization of molten iron, converter smelting (argon station), LF refining, VD vacuum degassing (Ca treatment), die casting pouring, ingot heating, descaling, 3800 rolling mill rolling, ACC cooling, straightening, steel plate stack cooling, normalization The pyrothermal treatment process obtains Q460C finished steel with the chemical composition described in Table 2 below, and its process parameters and mechanical properties are shown in Table 3 and 4 below.

[0027] Table 2: Chemical composition of steel in Example 2

[0028] C％

Si%

Mn%

P％

S％

Als%

(Nb+Ti+V+Ni)%

0.162

0.34

1.56

0.012

0.003

0.029

0.217

[0029] The process route of the present invention: molten iron KR desulfurization → converter smelting (argon station) → LF refining → VD vacuum degassing (Ca treatment) → mold casting pouring → slow cooling of steel ingots → heating → descaling → 3800 mill rolling → ACC cool...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
The average thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a low-alloy high-strength structural-steel extra-thick board Q460C and a production method thereof, the extra-thick board comprises the following chemical constituents in percentage by weight (with wt% as a unit): C: not more than 0.20, Si: not more than 0.60, Mn: 1.40-1.60, P: not more than 0.020, S: not more than 0.005, microalloying elements (V+Nb+Ti+Ni): not more than 0.25, Als: not less than 0.015, and the balance of Fe and residual elements. The microalloying elements are selected reasonably, the elements V, Nb, Ti, and Ni are added in best match, and therefore, the double effects of precipitation strengthening and fine-grain strengthening are fully exerted to ensure that each performance index of a pressure vessel board can meet the requirement of national standard on 120mm under the premise of not reducing plasticity and toughness.

Description

technical field [0001] The invention relates to the technical field of steel production, in particular to a low-alloy high-strength structural steel Q460C extra-thick plate and a production method thereof. Background technique [0002] With the economic construction and social development of our country, it is required to greatly improve the strength and toughness of steel, develop varieties that meet different requirements, improve steel quality, reduce production costs, and develop human-friendly basic materials in accordance with the requirements of sustainable development. Become the main research direction of steel materials. At present, there are not many domestic steel mills capable of producing known Q460C extra-thick plates, and there are few researches and reports at home and abroad. In particular, Q460C steel plate, a low-alloy high-strength structural steel with a thickness of more than 100mm, cannot be produced because of its difficulty in production and specia...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22C38/04C22C33/04C21D8/02
CPCY02P10/20
Inventor 郭艳芳朱书成许少普张立新崔冠军刘庆波雷文慧庞百鸣陈平张兵朱成杰乔华伟
Owner NANYANG HANYE SPECIAL STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap