Heatproof stainless steel seamless steel pipe and manufacture method of stainless steel and seamless steel pipe

A technology of heat-resistant stainless steel and seamless steel pipes, which is applied in the field of manufacturing heat-resistant stainless steel seamless steel pipes and stainless steel and seamless steel pipes, can solve the problems of toughness, durable strength, oxidation resistance, poor structural stability at high temperature, and low performance

Active Publication Date: 2014-10-01
TAIYUAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing austenitic heat-resistant stainless steel seamless pipe has low performance, poor toughness, durable strength, oxidation resistance and high temperature structure stabil

Method used

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  • Heatproof stainless steel seamless steel pipe and manufacture method of stainless steel and seamless steel pipe
  • Heatproof stainless steel seamless steel pipe and manufacture method of stainless steel and seamless steel pipe
  • Heatproof stainless steel seamless steel pipe and manufacture method of stainless steel and seamless steel pipe

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Embodiment Construction

[0125] The specific implementation of the present invention will be described in detail below in conjunction with the examples, but the specific implementation of the present invention is not limited to the following examples.

[0126] Examples of austenitic stainless steel

[0127] The composition mass percent of this austenitic stainless steel embodiment is:

[0128] C 0.06% Si 0.10% Mn 0.40% P 0.001% S 0.001%

[0129] Cr 21.00% Ni 23.5% Cu 3.0% Mo 2.30% N 0.25%

[0130] Nb 0.5% W 3.0% Co 2.5% B 0.006% Al 0.02%,

[0131] The rest is Fe and unavoidable impurities.

[0132] Examples of austenitic stainless steel seamless steel pipes

[0133] The specification of this austenitic stainless steel seamless steel pipe embodiment is Ф51×10 mm, the length is 12000 mm, and its composition mass percentage is:

[0134] C 0.06% Si 0.10% Mn 0.40% P 0.001% S 0.001%

[0135] Cr 21.00% Ni 23.5% Cu 3.0% Mo 2.30% N 0.25%

[0136] Nb 0.5% W 3.0% Co 2.5% B 0.006% Al 0.02%,

[0137] T...

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Abstract

The invention relates to a heatproof stainless steel seamless steel pipe and a manufacture method of stainless steel and a seamless steel pipe. The quality percentage of a seamless steel pipe and stainless steel is: C is 0.03% to 0.08%, Si is greater than 0% and smaller than or equal to 0.50%, Mn is greater than 0% and smaller than or equal to 0.50%, P is smaller than 0.020%, S is smaller than 0.020%, Cr is 18.00% to 25.00%, Ni is 21.5% to 31%, Cu is 2.00% to 4.00%, N is 0.10% to 0.35%, Nb is 0.30% to 0.65%, W is 1.0% to 5.0%, Mo is greater than 0% and smaller than or equal to 0.40%, Co is 1.0% to 4.0%, B is 0.003% to 0.009%, and A1 is greater than 0%, and smaller than or equal to 0.04%. The manufacture method of the seamless steel pipe comprises the following steps: I, smelting: smelting austenitic stainless steel; II, pouring molten steel into steel ingots; III, pipe blanks machining: the forging steel ingots, and machining central through holes into pipe blanks; IV, pipe billets forming after extrusion: machining pipe blanks into pipe billets through methods of reaming and extruding; V, further machining of steel pipes: performing cold drawing and pulling and acid cleaning to the pipe billets repeatedly to obtain finished products. The heatproof stainless steel seamless steel pipe, provided by the invention, can be used in an ultra-supercritical thermal power generating unit boiler at a temperature of 700 DEG C.

Description

[0001] A heat-resistant stainless steel seamless steel pipe and a method for manufacturing the stainless steel and the seamless steel pipe. technical field [0002] The invention relates to a heat-resistant stainless steel seamless steel pipe and a method for manufacturing the stainless steel and the seamless steel pipe, in particular to an austenitic heat-resistant stainless steel seamless pipe and a method for manufacturing the stainless steel and the seamless steel pipe. Background technique [0003] China is currently the world's largest coal producer and consumer, as well as the world's largest carbon dioxide emitter. In response to climate change, China is now facing enormous pressure to reduce carbon dioxide emissions. In 2013, China's coal consumption reached 3.6 billion tons, of which coal used for coal-fired power generation accounted for about 55% of the country's total coal consumption. In fact, coal-fired thermal power is China's largest and most concentrated so...

Claims

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Application Information

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IPC IPC(8): C22C38/54C22C33/04C21D8/10
Inventor 李阳方旭东夏焱王岩李莎王志斌范光伟李建民
Owner TAIYUAN IRON & STEEL GROUP
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