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Low temperature-resistant steel pipe material and preparation method thereof

A technology of low temperature resistance and steel pipe, applied in the field of low temperature resistant steel pipe material and its preparation, can solve the problems of low impact toughness, failure, low stress brittleness, etc., and achieve the effects of low cost, expanded application scope and stable structure.

Inactive Publication Date: 2014-04-23
安徽鼎德智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing steel pipe materials have low impact toughness at low temperature and are prone to low stress brittle failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] (1) According to the chemical composition, the following mass percentages are met: C 0.05-0.15, Si 0.1-0.3, Ni 2.2-2.8, Cr 1.5-2.0, Mn 0.8-1.2, Al 0.3-0.6, Mo 0.2-0.4, Nb 0.1- 0.2, Ti0.05-0.15, Nd 0.03-0.05, Er 0.02-0.04, N 0.004-0.008, V 0.002-0.005, S≤0.01, P≤0.02, the balance is Fe for batching, and the prepared charge is added to the arc Smelting in the furnace, the melting temperature is 1550°C, when the furnace charge is melted more than 80%, adjust the molten steel temperature to 1580°C, add 18kg / t steel slagging agent, keep it warm for 35min, remove slag, then adjust the temperature to 1620°C, add an appropriate amount Deoxidize ferromanganese and ferrotitanium for 15 minutes, take samples for analysis and adjust the composition. When the temperature of the molten steel reaches 1640°C, the steel can be tapped. After 2 minutes after the furnace is released, the aluminum cake of 1.2kg / t steel is inserted into the molten steel for final deoxidation;

[0015] ...

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PUM

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Abstract

The invention discloses a low temperature-resistant steel pipe material and a preparation method thereof. The low temperature-resistant steel pipe material comprises the following chemical components in percentage by weight: 0.05-0.15% of C, 0.1-0.3% of Si, 2.2-2.8% of Ni, 1.5-2.0% of Cr, 0.8-1.2% of Mn, 0.3-0.6% of Al, 0.2-0.4% of Mo, 0.1-0.2% of Nb, 0.05-0.15% of Ti, 0.03-0.05% of Nd, 0.02-0.04% of Er, 0.004-0.008% of N, 0.002-0.005% of V, not more than 0.01% of S, not more than 0.02% of P and the balance of Fe. The steel pipe material disclosed by the invention has great low-temperature impact toughness, can be used for a long time in an extreme low temperature area at the temperature of below -196 DEG C, has the advantages of stable organizational structure, high strength, great corrosion resistance and good welding property and formability and can expand the range of applications; furthermore, the production process has the advantages of simplicity and easiness in operation, low cost and good economic benefits, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a low-temperature-resistant steel pipe material and a preparation method thereof, belonging to the field of metallurgical materials. Background technique [0002] Seamless steel pipe is a round, square, or rectangular steel with a hollow section and no seams around it. Seamless steel pipes are made of steel ingots or solid tube blanks that are perforated into capillary tubes, and then made by hot rolling, cold rolling or cold drawing. The seamless steel pipe has a hollow section and is widely used as a pipe for conveying fluid. Compared with solid steel such as round steel, the steel pipe is lighter in weight when the bending and torsional strength is the same. It is an economical cross-section steel and is widely used in the manufacture of structures. parts and mechanical parts. In recent years, as the demand for steel pipes for cryogenic equipment continues to increase, the production and performance control of steel pipe m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/50C22C33/04C21D8/10
Inventor 王德志王宗义朱先玉王德泉卢秉林
Owner 安徽鼎德智能科技有限公司
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