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X60 pipeline steel and manufacturing method thereof

A production method and pipeline steel technology, applied in temperature control, metal rolling, etc., can solve problems such as high process requirements, low production efficiency, and process fluctuations have a great impact on mechanical properties, and achieve simple rolling process and low cost , Strong and tough matching effect

Active Publication Date: 2015-11-18
攀钢集团西昌钢钒有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The pipeline steel adopts Nb+V+Ti composite microalloying, and its Ti content is 0.02-0.05%. The steelmaking and hot rolling process requirements of titanium-containing steel are high, and the process fluctuation has a great influence on the mechanical properties. At the same time, because it uses " Low temperature, high pressure "rolling, need to wait for temperature during hot continuous rolling, low production efficiency

Method used

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  • X60 pipeline steel and manufacturing method thereof
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Embodiment Construction

[0020] The production process of the present invention is: desulfurization of molten iron→converter smelting compound blowing→deoxidation, alloying and desulfurization of high-alkalinity refining slag→feeding Al wire and Ti microalloying on the small platform behind the furnace→feeding calcium wire→continuous casting→ Slab heating→high pressure water descaling→rough rolling→finish rolling→laminar cooling→coiling→packing and storage.

[0021] X60 pipeline steel, after conventional converter smelting and continuous casting, the chemical composition of the finished steel is composed of: C: 0.05-0.10%, Si: 0.10-0.30%, Mn: 1.20-1.40%, P: ≤0.020% , S: ≤0.010%, Nb: 0.020-0.034%, V: 0.05-0.08%, Ti: 0.008-0.019%, and the rest are Fe and unavoidable impurities.

[0022] The preferred scheme is: C: 0.07-0.09%, Si: 0.15-0.25%, Mn: 1.25-1.40%, P: ≤0.018%, S: ≤0.005%, Nb: 0.025-0.034%, V: 0.05-0.08 %, Ti: 0.008-0.010%, the rest is Fe and unavoidable impurities.

[0023] The production tec...

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Abstract

The invention relates to a hot continuous rolling steel strip and a manufacturing method thereof, in particular to X60 pipeline steel and a manufacturing method thereof. According to the technical scheme, the X60 pipeline steel is composed of, by weight, 0.05%-0.10% of C, 0.10%-0.30% of Si, 1.20%-1.40% of Mn, 0-0.020% of P, 0-0.010% of S, 0.020%-0.034% of Nb, 0.05%-0.08% of V, 0.008%-0.019% of Ti, and the balance Fe and unavoidable impurities. No expensive elements such as Mo and Ni are needed to be added, so that cost is relatively low; the rolling technique is simple and high in operability. In addition, the manufactured X60 pipeline steel has the characteristics of being stable in mechanical property, good in matching between strength and toughness and excellent in welding property.

Description

technical field [0001] The invention belongs to the technical field of hot continuous rolling strip production, and in particular relates to an X60 pipeline steel and a production method thereof. Background technique [0002] Among the five transportation methods of railway, highway, aviation, water transportation and pipeline, pipeline transportation is an economical, safe and uninterrupted transportation method. Pipeline transportation of oil and gas has the characteristics of high efficiency, economy, safety and no pollution. most efficient tool. With the rapid development of pipeline engineering, the rapid development of pipeline steel production has been driven. [0003] Oil and natural gas transmission pipelines are divided into two parts: long-distance pipelines and gathering pipelines inside oil fields. In order to improve the transmission efficiency of the long-distance pipeline, the transmission pressure of the main line is relatively high, and it is required to ...

Claims

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Application Information

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IPC IPC(8): C22C38/14B21B1/22B21B37/74
Inventor 张开华叶晓瑜王羿熊雪刚龚慧李卫平
Owner 攀钢集团西昌钢钒有限公司
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