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Novel low-cost wear-resistant pipe steel X65 steel plate and production method thereof

A production method and low-cost technology, applied in the field of continuous casting production of medium and heavy plates, can solve the problems of application influence and high production cost of pipe fittings, and achieve the effects of uniform performance, improved wear resistance, and simple and effective process design.

Active Publication Date: 2014-04-16
NANYANG HANYE SPECIAL STEEL CO LTD
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Problems solved by technology

However, at this stage, the production cost of pipe fitting steel is relatively high, which has a certain impact on its application.

Method used

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Embodiment Construction

[0020] The new low-cost wear-resistant pipe fitting steel X65 steel plate of the present invention contains the following chemical components in mass percentage (unit, wt%): C: 0.04-0.10, Si: 0.10-0.40, Mn: 1.40-1.60, P: ≤0.02, S: ≤0.015, Als: 0.015-0.060, Ti: 0.005-0.06, Cr: 0.20-0.70, V: 0.02-0.07, and others are Fe and residual elements.

[0021] In order to obtain the above-mentioned steel plates, the production methods adopted by the present invention include: converter smelting, LF refining, VD vacuum treatment (optional), continuous casting, slow cooling of slab, heating, TMCP rolling, slow cooling, quenching and tempering.

[0022] 1. In the converter smelting process, tap carbon ≤ 0.06%, tap P ≤ 0.018%, S ≤ 0.020%; the number of spot blowing should not exceed 2 times to avoid slag during tapping; argon station adds aluminum wire for deoxidation.

[0023] 2. In the LF refining, a large amount of slag is used for slagging to ensure that the retention time of white slag ...

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Abstract

The invention provides a novel low-cost wear-resistant pipe steel X65 steel plate which comprises the following chemical components in percentage by mass: 0.04-0.10% of C, 0.10-0.40% of Si, 1.40-1.60% of Mn, at most 0.02% of P, at most 0.015% of S, 0.015-0.060% of Als, 0.005-0.06% of Ti, 0.20-0.70% of Cr, 0.02-0.07% of V, and other Fe and residual elements. The production method comprises the following steps: converter smelting, LF (ladle furnace) refining, VD (vacuum degasser) vacuum treatment (optional), continuous casting, slow cooling of casting blank, heating, TMCP (thermomechanical rolling process) rolling, slow cooling, and hardening and tempering. By using the novel composite microalloying component design idea and simple effective process design, the method lowers the production cost of the steel plate, ensures the mechanical properties, ultrasonic flaw detection index and other indexes of the steel plate, and enhances the wear resistance of the steel plate. The steel plate produced according to the scheme has the advantages of uniform properties, excellent flaw detection quality and certain wear resistance, can be widely used in the fields of petrochemical industry, coal chemical industry, machine manufacturing and the like, and has favorable popularization meanings.

Description

technical field [0001] The invention relates to the field of medium and thick plates produced by continuous casting, in particular to a novel low-cost wear-resistant pipe fitting steel X65 steel plate and a production method thereof. Background technique [0002] Specification 10~60mm X65 pipe fitting steel is a high-strength pipe fitting steel plate, which has high strength, good cold deformation ability, good plasticity and toughness, and can be widely used in various petrochemical, coal chemical, machinery manufacturing, etc. project. However, the production cost of pipe fitting steel is relatively high at this stage, which has a certain impact on its application. Contents of the invention [0003] In view of the above problems, the inventor obtained a new type of low-cost wear-resistant pipe fitting steel X65 steel plate with a specification of 10-60mm to ensure performance and flaw detection after exploration, thus completing the present invention. [0004] Therefor...

Claims

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Application Information

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IPC IPC(8): C22C38/38C22C38/28C22C33/06C21D8/02
Inventor 朱书成许少普刘庆波赵迪雷文慧郭艳芳
Owner NANYANG HANYE SPECIAL STEEL CO LTD
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