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Hull structural steel with excellent welding performance and producing method thereof

A technology of welding performance and production method, which is applied in the field of low-carbon low-alloy high-strength steel manufacturing, can solve problems such as poor welding performance and mechanical performance, complicated production process, and high price, and achieve excellent welding performance, excellent mechanical performance and low cost. Effect

Inactive Publication Date: 2008-08-27
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the disadvantages of existing hull structural steels, such as poor welding performance and mechanical properties, expensive alloy elements such as Ni and Mo in chemical composition, and complex production process, and provides a hull structural steel with excellent welding performance and its The production method, the steel has excellent welding performance and mechanical properties, does not contain alloy elements such as Ni and Mo, the production process is easy to control, and the operation is simple

Method used

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  • Hull structural steel with excellent welding performance and producing method thereof
  • Hull structural steel with excellent welding performance and producing method thereof
  • Hull structural steel with excellent welding performance and producing method thereof

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Embodiment 1

[0046] According to the production method of the present invention, steel 1 is produced, and its chemical composition is shown in steel 1 in table 1. The concrete parameter control of the production method is shown in steel 1 in table 2, and its mechanical properties are shown in steel 1 in table 3. See steel 1 in Table 4 for the mechanical properties and fracture locations of the heat-affected zone after electric vertical welding.

Embodiment 2

[0048] According to the production method of the present invention, steel 2 is produced, and its chemical composition is shown in steel 2 in table 1. The concrete parameter control of the production method is shown in steel 2 in table 2, and its mechanical properties are shown in steel 2 in table 3. See steel 2 in Table 4 for the mechanical properties and fracture locations of the heat-affected zone after electric vertical welding.

Embodiment 3

[0050] According to the production method of the present invention, steel 3 is produced, and its chemical composition is shown in steel 3 in table 1. The concrete parameter control of the production method is shown in steel 3 in table 2, and its mechanical properties are shown in steel 3 in table 3. See steel 3 in Table 4 for the mechanical properties and fracture locations of the heat-affected zone after electric vertical welding.

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Abstract

The invention discloses a hull structure steel with excellent welding performance and the manufacturing method thereof, which belongs to the manufacturing field of low-carbon low-alloy high strength steel, and hull structure steel with excellent welding performance can be manufactured through utilizing the invention. According to the percentage by weight, the chemical components of the steel comprise C 0.05-0.25%, Si 0.01-1.0%, Mn 0.50-2.0%, P<=0.020%, S<=0.010%, Ti 0.005-0.10%, Nb 0.005-0.10%, and others are Fe and unavoidable impurities, and the chemical components satisfy the following relationship: firstly, 0.015%<=C*Si<=0.075%, secondly, 0.095%<=C*Mn<=0.15%, thirdly, 0.0003%<=Nb*Ti<=0.0005%. The specific manufacturing method comprises the following steps: heating bar plates, roughly rolling, finish rolling, water cooling and air cooling. The steel has high welding performance and mechanical property, and does not contain alloy elements such as Ni, Mo and the like, the manufacturing process is easy to control, and the operation is simple.

Description

technical field [0001] The invention relates to the field of low-carbon low-alloy high-strength steel manufacturing, in particular to a ship hull structural steel with excellent welding performance, which is applied in the shipbuilding industry. Background technique [0002] The shipbuilding industry has broad prospects for development. With the development of the world economy and the growth of trade, the demand for ships continues to rise. Major changes are taking place in the shipbuilding industry in the world today: first, high and new technologies are increasingly concentrated in the shipbuilding industry; second, the acceleration of world economic and technological integration has promoted the development of the international shipping industry and provided a broad market demand for the shipbuilding industry. The shipbuilding industry has a strong pulling effect on the national economy, and vigorously developing the shipbuilding industry can drive the rapid development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14B21B37/74
Inventor 陈颜堂陈晓朱丛茂范植金芮晓龙欧阳凯柳志敏桂洲
Owner 武钢集团有限公司
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