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Energy recovery turbine blade material for low-temperature and high-acidity working conditions and preparation method of energy recovery turbine blade material

An energy recovery, turbine blade technology, applied in metal processing equipment, blade supporting elements, mechanical equipment, etc., can solve the problems of poor corrosion resistance and high cost of low temperature and high acid substances, optimize the manufacturing process, solve the corrosion resistance problem The effect of poor performance, good welding performance and economy

Pending Publication Date: 2022-05-06
XIAN SHAANGU POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the cost of 17-4PH material is low when selecting blades in the current energy recovery turbine device, but its corrosion resistance to low-temperature and high-acid substances is poor. Although titanium alloy materials have better corrosion resistance to low-temperature and high-acid substances, the technical problem of high cost is to provide an energy recovery turbine blade material and preparation method for low-temperature and high-acid conditions

Method used

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  • Energy recovery turbine blade material for low-temperature and high-acidity working conditions and preparation method of energy recovery turbine blade material
  • Energy recovery turbine blade material for low-temperature and high-acidity working conditions and preparation method of energy recovery turbine blade material
  • Energy recovery turbine blade material for low-temperature and high-acidity working conditions and preparation method of energy recovery turbine blade material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 1. According to the following composition, the ingredients are calculated in weight percentage:

[0058] C: 0.03%, Si: 0.7%, Mn: 1%, P: 0.01%, S: 0.001%, Cr: 11.5%, Ni: 4%, Mo: 1.2%, Cu: 2%, Nb: 0.3%, V: 0.045%, Al: 0.05%, Co: 0.02%, Nb+Ti+V: 0.35%, N: 0.02%, and the rest is Fe.

[0059] The mixed raw materials are smelted and cast in an electric furnace to obtain a primary steel ingot, and the primary steel ingot is subjected to secondary smelting and pouring in a vacuum state to obtain a secondary steel ingot as a billet. The smelting, casting and pouring processes for obtaining primary steel ingots and secondary steel ingots can be adjusted according to actual conditions.

[0060] 2. Forging and heat treatment after forging

[0061] The forging can be obtained by forging the secondary steel ingot as a blank in the austenite single-phase region, and air cooling to room temperature after forging. Among them, the initial forging temperature of the austenite single-ph...

Embodiment 2

[0066] 1. According to the following composition, the ingredients are calculated in weight percentage:

[0067] C: 0.055%, Si: 0.3%, Mn: 0.55%, P: 0.02%, S: 0.003%, Cr: 14%, Ni: 4%, Mo: 1.5%, Cu: 1.5%, Nb: 0.35%, V: 0.05%, Al: 0.1%, Co: 0.1%, Nb+Ti+V: 0.45%, N: 0.06%, and the rest is Fe.

[0068] 2. Forging and heat treatment after forging

[0069] The forging can be obtained by forging the secondary steel ingot as a blank in the austenite single-phase region, and air cooling to room temperature after forging. Among them, the initial forging temperature in the austenite single-phase region is 1180°C, the final forging temperature is 900°C, at least three times of upsetting and three times of elongation are carried out, and the secondary deformation of the final fire is 52%, and the forging ratio is 7. Recrystallization cooling at 660°C was carried out.

[0070] 3. Performance heat treatment

[0071] The forgings are subjected to solution heat treatment, adjustment heat tre...

Embodiment 3

[0074] 1. According to the following composition, the ingredients are calculated in weight percentage:

[0075] C: 0.045%, Si: 0.2%, Mn: 0.6%, P: 0.02%, S: 0.005%, Cr: 12.5%, Ni: 3.5%, Mo: 1.6%, Cu: 2.2%, Nb: 0.15%, V: 0.04%, Al: 0.08%, Co: 0.03%, Nb+Ti+V: 0.3%, N: 0.05%, and the rest is Fe.

[0076] 2. Forging and heat treatment after forging

[0077] The forging can be obtained by forging the secondary steel ingot as a blank in the austenite single-phase region, and air cooling to room temperature after forging. Among them, the initial forging temperature of the austenite single-phase region is 1150°C, the final forging temperature is 880°C, at least three times of upsetting and three times of elongation are carried out, and the secondary deformation of the final fire is 48%, and the forging ratio is 6. Recrystallization cooling at 650°C was performed.

[0078] 3. Performance heat treatment

[0079] The forgings are subjected to solution heat treatment, adjustment heat t...

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Abstract

The invention belongs to an energy recovery turbine blade material and a preparation method, and aims to solve the technical problems that a blade in an existing energy recovery turbine device is made of a 17-4PH material, although the cost is low, the low-temperature and high-acid substance corrosion resistance is poor, and a titanium alloy material is extremely high in cost. The invention provides an energy recovery turbine blade material for a low-temperature and high-acidity working condition and a preparation method. The blade material comprises the following components in percentage by weight: 0.03% < = C < = 0.055%; si is more than 0 and less than or equal to 0.7%; 0.55% < = Mn < 1.3%; 0 < P < 0.025%; 0 < S < 0.015%; 11.5% < = Cr < = 14.0%; 3.5% < = Ni < = 4.5%; 1.2% < = Mo < = 1.6%; 1.5% < = Cu < = 2.3%; 0 < Nb < = 0.35%; 0 < V < = 0.05%; 0 < Al < = 0.10%; 0 < Co < = 0.10%; 0 < Nb, Ti and V < = 0.50%; n is greater than or equal to 0.02% and less than or equal to 0.065%. In addition, the equivalent weight of Ni is smaller than 9.2, the equivalent weight of Cr is smaller than 18.7, and the ratio of the equivalent weight of Ni to the equivalent weight of Cr is larger than 0.42 and smaller than 0.48. The preparation method comprises the steps of smelting, forging, heat treatment after forging and performance heat treatment.

Description

technical field [0001] The invention belongs to an energy recovery turbine blade material and a preparation method thereof, in particular to an energy recovery turbine blade material and a preparation method under low-temperature and high-acid working conditions. Background technique [0002] The energy recovery turbine device is a device that recovers the pressure energy and heat energy generated in blast furnace smelting, converts them into mechanical energy, and then converts the mechanical energy into electrical energy. [0003] The working medium used by the energy recovery turbine device is blast furnace gas, that is, the device works under the condition of high speed, blast furnace dust and corrosive gas medium, and the working conditions are complex and the working cycle is long. Even after passing through the pre-order dust removal and filtration device, a certain amount of furnace dust, water vapor, and various acidic components such as SO 2 , SO 3 、H 2 S, HCl, ...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/42C22C38/48C22C38/46C22C38/06C22C38/52C22C38/50C22C33/04B21J5/00C21D6/02C21D8/00
CPCC22C38/02C22C38/04C22C38/44C22C38/42C22C38/48C22C38/46C22C38/06C22C38/52C22C38/50C22C38/001C22C33/04B21J5/002C21D6/004C21D6/005C21D6/007C21D6/008C21D6/02C21D8/005F01D5/28C21D2211/008
Inventor 支金花韩增福魏怡航张海存喻欢欢宋金柱郭文勇蒋勇
Owner XIAN SHAANGU POWER
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