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A control CEQ and PCM large input energy welding normalizing type eh36 extra thick plate and its manufacturing method

A large input energy welding, EH36 technology, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve the problems of steel plate surface structure differences, poor uniformity, etc., to achieve good plate shape, increase strength, and improve the effect of fine-grain strengthening Effect

Active Publication Date: 2021-01-05
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are obvious differences between the surface structure and the core of the steel plate produced by this process, and the uniformity is poor.

Method used

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  • A control CEQ and PCM large input energy welding normalizing type eh36 extra thick plate and its manufacturing method
  • A control CEQ and PCM large input energy welding normalizing type eh36 extra thick plate and its manufacturing method
  • A control CEQ and PCM large input energy welding normalizing type eh36 extra thick plate and its manufacturing method

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Embodiment Construction

[0032] Below in conjunction with specific embodiment and comparative example, a kind of control Ceq ​​and Pcm large input energy welding normalizing type EH36 extra-thick plate and its manufacturing method are described in further detail, and these embodiments are only used for the purpose of comparison and explanation, the present invention It is not limited to these Examples.

[0033] The component design of the steel plate forging blank of the present invention is based on the following principles:

[0034] Carbon: C is an essential element to ensure the strength of the normalized steel plate, and significantly affects the weldability of the material; when the C content is less than 0.14%, the strength of the normalized steel plate does not meet the use requirements; when the C content exceeds 0.15% , the M-A content in the heat-affected zone of the high-energy-input welded steel plate will increase significantly, reducing the toughness of the heat-affected zone. Therefore...

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Abstract

The invention discloses a Ceq and Pcm controlled high heat input welding normalized EH36 extra-thick plate and a manufacturing method thereof, and belongs to the technical field of steel for ocean engineering. The normalized EH36 extra-thick plate comprises the following components in percentage by mass: 0.14-0.15% of C, 0.10-0.25% of Si, 1.2-1.5% of Mn, not greater than 0.005% of S, not greater than 0.005% of P, 0.015-0.03% of Als, 0.008-0.015% of Ti, 0.0005-0.001% of B, 0.011-0.014% of N, 0.05-0.08% of V, and the balance Fe and inevitable impurities. The manufacturing method comprises the following steps of molten steel is smelted; the molten steel is refined and continuously cast to obtain a continuous casting blank; the continuous casting blank is rolled as a steel plate by a two-stagerolling process; and the rolled steel plate is normalized, and is cooled to the room temperature in air. The normalized EH36 extra-thick plate can be used for ocean engineering equipment.

Description

technical field [0001] The invention belongs to the technical field of steel for ocean engineering, and in particular relates to a control Ceq ​​and Pcm large input energy welding normalizing type EH36 extra-thick plate and a manufacturing method thereof. Background technique [0002] Ocean engineering equipment is a typical large-scale welding engineering structure. It has been served in harsh environments such as low temperature and waves for a long time. It is required to have the characteristics of high strength, toughness, large thickness, and lamellar tear resistance. In order to ensure its safety, it is usually used in normalizing state. steel plate. Moreover, with the enlargement of marine engineering equipment, the thickness specifications of the steel plates used are increasing. In order to effectively improve the welding efficiency and reduce the construction period, it is required that the steel plates can be welded by the method of large heat input welding, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/28C21D8/02C21D6/00C21D9/00C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
CPCC21D1/28C21D6/005C21D6/008C21D8/0226C21D9/0081C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 师仲然王佳骥柴锋付魁军杨才福韩严法罗小兵胡奉雅傅博
Owner CENT IRON & STEEL RES INST
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