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Low-temperature-resistant hot-rolled channel steel for marine engineering and manufacturing method thereof

A technology of marine engineering and manufacturing method, applied in the field of metallurgy, can solve problems such as use restriction and cost increase, and achieve the effect of improving low temperature toughness, low cost and good mechanical properties

Inactive Publication Date: 2016-12-07
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, adding Nb, Ti, etc., the cost increases significantly, and at the same time, the use in extremely cold regions under the condition of -50°C is limited

Method used

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  • Low-temperature-resistant hot-rolled channel steel for marine engineering and manufacturing method thereof
  • Low-temperature-resistant hot-rolled channel steel for marine engineering and manufacturing method thereof
  • Low-temperature-resistant hot-rolled channel steel for marine engineering and manufacturing method thereof

Examples

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Embodiment Construction

[0040] Specific examples are listed below to illustrate the present invention. It should be pointed out that the embodiments are only used to further illustrate the present invention and do not limit the protection scope of the present invention. Non-essential modifications and adjustments made by others according to the present invention still belong to the protection scope of the present invention.

[0041] The continuous casting slabs in the following examples are prepared according to the following process flow: according to the set chemical composition range (Table 1), the chemical composition C, Si, Mn, S, P and Fe are used as raw materials for converter smelting and refining , Continuous casting, direct heating or soaking. The preparation steps of Examples 1-3 are as follows:

[0042] 1. Hot metal pre-desulfurization:

[0043] For the desulfurization of molten iron made from raw ore, after desulfurization, ensure that the sulfur content in the molten iron is ≤0.008wt%;

[004...

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Abstract

The invention belongs to the technical field of metallurgy and particularly relates to low-temperature-resistant hot-rolled channel steel for marine engineering and a manufacturing method thereof. The low-temperature-resistant hot-rolled channel steel for marine engineering comprises the following chemical components in percentage by weight: 0.06%-0.10% of C; 0-0.4% of Si; 0.9%-1.6% of Mn; 0.02%-0.08% of V; 0-0.02% of P; 0-0.01% of S; 0-0.015% of N; 0.02%-0.05% of Al; 0-0.004% of O; and the balance Fe and inevitable impurities. The channel steel for marine engineering, provided by the invention, has favorable mechanical properties, the yield strength of the channel steel is greater than or equal to 355 MPa, the tensile strength of the channel steel is greater than or equal to 470 MPs, and especially, the longitudinal impact energy of the channel steel is greater than or equal to 34 J at minus 50 DEG C. Therefore, the channel steel is applicable to extremely cold areas.

Description

Technical field [0001] The present invention belongs to the technical field of metallurgy. Specifically, the present invention relates to a low-temperature-resistant hot-rolled channel steel for marine engineering and a manufacturing method thereof. Background technique [0002] Offshore platforms are special places for operations on the ocean, mainly used for offshore oil and gas drilling and development. With the ever-increasing demand for oil and natural gas, oil and gas exploitation has shown a parallel development of land and sea. As a supporting structure for offshore oil and gas drilling and production, offshore engineering equipment has broad prospects and strong development momentum. At present, more than 100 countries around the world are conducting offshore oil exploration. Since the service period of offshore platforms is 50% longer than that of ships, the steel used must have high strength, high toughness, fatigue resistance, layered tear resistance, good weldabilit...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/02C22C38/12C22C38/06C22C38/14C22C38/08
CPCC22C38/001C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14
Inventor 王中学赵培林杜传治武玉利方金林李超郭秀辉赵传东韩文习杨栋
Owner SHANDONG IRON & STEEL CO LTD
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