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A kind of high temperature resistant seamless steel pipe and preparation method thereof

A technology for seamless steel pipes and high temperature resistance, applied in the field of steel pipes, can solve the problems of poor high temperature resistance and mechanical strength of seamless steel pipes, complicated preparation process, etc.

Active Publication Date: 2022-07-15
无锡恒丰祥钢管科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the present invention provides a high-temperature-resistant seamless steel pipe and its preparation method. The prepared seamless steel pipe has excellent high-temperature resistance and mechanical strength, and also has good oxidation resistance and corrosion resistance. performance, the production and preparation process is simple, suitable for large-scale production, and solves the problems of poor high temperature resistance and mechanical strength of seamless steel and complex preparation process in the prior art

Method used

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  • A kind of high temperature resistant seamless steel pipe and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The chemical composition of the high temperature resistant seamless steel pipe provided by the present embodiment and its mass percentage are:

[0019] C: 0.12%, Mn: 0.5%, Si: 0.5%, Cr: 8%, Ni: 22%, Ti: 0.05%, V: 0.02%, Cu: 0.05%, W: 0.18%, Pt: 0.005%, Mo: 0.05%, Os: 0.002%, Nb: 0.005%, Re: 0.005%, Zr: 0.005%, Ta: 0.015%, P: 0.02%, S: 0.005%, the balance being Fe and inevitable impurities.

[0020] The specific steps for preparing the above-mentioned high temperature resistant seamless steel pipe are as follows:

[0021] (1) After the molten iron is pretreated, it is smelted in a converter, adding alloy components, adding a refining agent for refining outside the furnace, and filling with argon during the refining process; then vacuum degassing, the vacuum degree is ≤ 0.1Kpa, and the degassing time is 20 minutes; Round tube billet continuous casting and cooling annealing treatment are carried out.

[0022] (2) The obtained round billet is heated in an annular furnace ...

Embodiment 2

[0025] The chemical composition of the high temperature resistant seamless steel pipe provided by the present embodiment and its mass percentage are:

[0026] C: 0.15%, Mn: 0.5%, Si: 0.8%, Cr: 10%, Ni: 25%, Ti: 0.08%, V: 0.03%, Cu: 0.1%, W: 0.2%, Pt: 0.008%, Mo: 0.08%, Os: 0.006%, Nb: 0.01%, Re: 0.01%, Zr: 0.01%, Ta: 0.015%, P: 0.005%, S: 0.002%, and the balance was Fe and unavoidable impurities.

[0027] The specific steps for preparing the above-mentioned high temperature resistant seamless steel pipe are as follows:

[0028] (1) After the molten iron is pretreated, it is smelted in a converter, adding alloy components, adding a refining agent for refining outside the furnace, and filling with argon during the refining process; then vacuum degassing, the vacuum degree is less than or equal to 0.1Kpa, and the degassing time is 30 minutes; Round tube billet continuous casting and cooling annealing treatment are carried out.

[0029] (2) The obtained round billet is heated in...

Embodiment 3

[0032] The chemical composition of the high temperature resistant seamless steel pipe provided by the present embodiment and its mass percentage are:

[0033] C: 0.18%, Mn: 0.6%, Si: 1%, Cr: 12%, Ni: 28%, Ti: 0.12%, V: 0.04%, Cu: 0.15%, W: 0.23%, Pt: 0.012%, Mo: 0.1%, Os: 0.01%, Nb: 0.02%, Re: 0.015%, Zr: 0.015%, Ta: 0.018%, P: 0.01%, S: 0.005%, and the balance was Fe and inevitable impurities.

[0034] The specific steps for preparing the above-mentioned high temperature resistant seamless steel pipe are as follows:

[0035] (1) After the molten iron is pretreated, it is smelted in a converter, adding alloy components, adding a refining agent for refining outside the furnace, and filling with argon during the refining process; then vacuum degassing, the vacuum degree is less than or equal to 0.1Kpa, and the degassing time is 40 minutes; Round tube billet continuous casting and cooling annealing treatment are carried out.

[0036] (2) The obtained round billet is heated in an ...

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Abstract

The invention relates to the technical field of steel pipes, in particular to a high-temperature-resistant seamless steel pipe and a preparation method thereof. The chemical components and mass percentages contained in the high-temperature-resistant seamless steel pipe are: C: 0.12-0.22%, Mn: 0.5-0.8%, Si: 0.5 to 1.5%, Cr: 8 to 12%, Ni: 22 to 30%, Ti: 0.05 to 0.15%, V: 0.02 to 0.05%, Cu: 0.05 to 0.2%, W: 0.18 to 0.25%, Pt : 0.005 to 0.02%, Mo: 0.05 to 0.1%, Os: 0.002 to 0.01%, Nb: 0.005 to 0.05%, Re: 0.005 to 0.02%, Zr: 0.005 to 0.02%, Ta: 0.015 to 0.02%, P: ≤0.02%, S: ≤0.005%, the balance is Fe and inevitable impurities. The seamless steel pipe prepared by the invention has excellent high temperature resistance and mechanical strength, also has good oxidation resistance and corrosion resistance, simple production and preparation process, suitable for large-scale production, and solves the problem of high temperature resistance of seamless steel in the prior art. The problems of poor performance and mechanical strength and complicated preparation process.

Description

technical field [0001] The invention relates to the technical field of steel pipes, in particular to a high temperature resistant seamless steel pipe and a preparation method thereof. Background technique [0002] Steel pipe can not only be used for transporting fluids and powdered solids, exchanging heat energy, manufacturing mechanical parts and containers, but also an economical steel, which is widely used in ventilation and heating equipment, engineering structures, thermal equipment, petrochemicals, machinery manufacturing, geological drilling , high-voltage equipment, defense and aerospace and many other fields. With the continuous progress of power production technology and the continuous improvement of people's living standards, the quality requirements for steel pipes are also getting higher and higher, not only requiring higher strength, hardness, corrosion resistance, wear resistance, high temperature resistance, Bending and impact resistance, but also need to ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C21D8/10C22C33/04
CPCC22C38/02C22C38/04C22C38/50C22C38/46C22C38/42C22C38/44C22C38/48C22C38/002C22C33/04C21D8/105
Inventor 张义山张仁杰
Owner 无锡恒丰祥钢管科技有限公司
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