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High-temperature-resisting forge piece for turbine and forging method of high-temperature-resisting forge piece

A high temperature resistant, steam turbine technology, applied in metal processing equipment and other directions, can solve the problems of inability to meet the mechanical properties of products, poor forgeability, high high temperature hardness, and achieve the effect of reducing the phenomenon of easy cracking

Inactive Publication Date: 2018-02-16
JIANGYIN FANGYUAN RINGLIKE FORGING & FLANGE
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Problems solved by technology

[0002] In the prior art, the high temperature resistant forgings for steam turbines are mainly composed of C: 0.18-0.24%, Si: 0.10-0.50%, Mn: 0.30-0.80%, P: ≤0.025%, S: ≤0.020%, Cr: 11.00- 12.5%, Mo: 0.80-1.20%, Ni: 0.30-0.80%, V: 0.25-0.35%, W ≤0.60%, the existing ingredients cannot meet the mechanical properties of the product in three directions. High-temperature forgings, this type of steel material has high high-temperature hardness and poor forgeability
Forging temperature range is small 1150-950℃, forging is easy to crack

Method used

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Embodiment Construction

[0018] The present invention will be further described below in combination with specific embodiments.

[0019] The invention discloses a high-temperature-resistant forging for steam turbines. The components include: C: 0.20-0.24%, Si: 0.10-0.50%, Mn: 0.50-0.80%, P: ≤0.025%, S: ≤ 0.020%, Cr: 11.8-12.5%, Mo: 1.0-1.20%, Ni: 0.60-0.80%, V: 0.25-0.35%, Al: 0.02-0.05%, W: ≤0.60%, Nb0.02-0.05% , N: 80-180PPm, the rest is Fe and unavoidable impurities.

[0020] A method for forging high temperature resistant forgings for steam turbines, comprising the following steps:

[0021] S1: Blanking: remove the uneven structure at the end of the Φ400mm round steel, measure 731mm for cutting;

[0022] S2: Heating: put the billet into a natural gas heating furnace for heating, first heat up to 800°C with the furnace and keep it for 2 hours, then heat it up to 1180°C for 3 hours with the furnace and then take it out of the furnace;

[0023] S3: Forging: Forging is carried out with the aid of a...

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Abstract

The invention provides a high-temperature-resisting forge piece for a turbine and a forging method of the high-temperature-resisting forge piece. The high-temperature-resisting forge piece for the turbine comprises, by weight percent, 0.20%-0.24% of C, 0.10%-0.50% of Si, 0.50%-0.80% of Mn, smaller than or equal to 0.025% of P, smaller than or equal to 0.020% of S, 11.8%-12.5% of Cr, 1.0%-1.20% ofMo, 0.60%-0.80% of Ni, 0.25%-0.35% of V, 0.02%-0.05% of Al, smaller than or equal to 0.60% of W, 0.02%-0.05% of Nb, and the balance Fe and inevitable impurities, wherein the concentration of N is 80 PPm-180 PPm.

Description

technical field [0001] The invention relates to a high temperature resistant forging for a steam turbine and a forging method thereof. Background technique [0002] In the prior art, the high temperature resistant forgings for steam turbines are mainly composed of C: 0.18-0.24%, Si: 0.10-0.50%, Mn: 0.30-0.80%, P: ≤0.025%, S: ≤0.020%, Cr: 11.00- 12.5%, Mo: 0.80-1.20%, Ni: 0.30-0.80%, V: 0.25-0.35%, W ≤0.60%, the existing ingredients cannot meet the mechanical properties of the product in three directions. High-temperature forgings, this type of steel material has high high-temperature hardness and poor forgeability. The forging temperature range is as small as 1150-950°C, and the forging is easy to crack. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the above technology, thereby providing a high temperature resistant forging for a steam turbine, which can satisfy the mechanical properties of the product in thre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/48C21D8/06
CPCB21J5/002C21D8/065C22C38/001C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/48
Inventor 赵清赵元俊赵春良
Owner JIANGYIN FANGYUAN RINGLIKE FORGING & FLANGE
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