Production method of barium cleaning iron-chromium-aluminum alloy

An iron-chromium-aluminum alloy and production method technology, applied in the field of alloy manufacturing, can solve the problems of poor quality of FeCrAl alloy products and difficulty in continuous production, and achieve the effects of improving high-temperature oxidation resistance and increasing yield

Pending Publication Date: 2021-09-03
国研(淮安)新材科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problem that the quality of the above-mentioned FeCrAl alloy product is poor and it is difficult to produce continuously, the present invention provides a production method of barium-cleaned iron-chromium-aluminum alloy

Method used

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  • Production method of barium cleaning iron-chromium-aluminum alloy
  • Production method of barium cleaning iron-chromium-aluminum alloy

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Embodiment 1

[0025] A method for producing barium-purified iron-chromium-aluminum alloys, the steps comprising:

[0026] S1. Weigh the ingredients of pure iron, medium-carbon ferrochrome and silicon-manganese alloy to make the carbon content reach 0.5%, and add them as smelting raw materials into the smelting furnace for smelting;

[0027] S2. Carry out vacuum decarburization in an AOD furnace, make the C in the smelted alloy ≤0.05% by weight percentage, and add ferrosilicon for pre-deoxidation. This step can also be carried out in a VOD furnace;

[0028] S3. Continue smelting to make Si, Mn and Cr all reach the preset range, wherein Si≤1.0%, Mn≤1.0%, and Cr are 17%~25% by weight percentage;

[0029] S4, adding aluminum ingots for final deoxidation, performing sufficient soft blowing, and adjusting the content of Al in the refining furnace, so that the weight percentage of Al is controlled between 5% and 8.5%;

[0030] S5. Weigh the barium alloy and add it to the refining furnace so that ...

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Abstract

The invention provides a production method of a barium cleaning iron-chromium-aluminum alloy. The method comprises the following steps: S1, an alloy containing Si, Mn and Cr is proportioned, and the alloy as a smelting raw material is added into a smelting furnace for smelting; S2, vacuum decarburization is conducted in an AOD furnace or a VOD furnace, C is smaller than or equal to 0.05 wt%, and silicon iron is added for pre-deoxidation; S3, smelting is continued to enable Si, Mn and Cr to reach a preset range; S4, an aluminum ingot is added for final deoxidation, sufficient soft blowing is conducted, the content of Al is adjusted in the refining furnace, and the content of Al is controlled to be 5-8.5 wt%; S5, barium alloy is weighed and added into the refining furnace, the weight percentage of Ba is 0.010%-0.5%, and sufficient stirring is conducted; S6, high-calcium refining slag is adopted to adsorb and remove impurities; S7, La is added into the refining furnace for rare earth alloying, and the weight percentage of La is 0.03%-0.15%; and S8, continuous casting, hot continuous rolling, annealing, acid pickling, coping, cold rolling, intermediate annealing, cold rolling, longitudinal shearing, withdrawal and straightening and finished product packaging are conducted, and the product is obtained.

Description

technical field [0001] The invention relates to a method for producing an alloy, in particular to a production method for denaturing inclusions of iron-chromium-aluminum alloys with barium elements to improve the cleanliness of the alloys. Background technique [0002] At present, it is considered that the metal carrier materials suitable for the exhaust gas purifier of internal combustion engines include NiCr, FeCrAl and FeMoW. FeCrAl superalloys have relatively low coefficient of thermal expansion, strong high-temperature oxidation resistance, and relatively low production costs. Considering comprehensive considerations such as processing performance and economic value, they have the most application prospects. During the working process of the exhaust gas purifier, the carrier of the purifier is washed by the exhaust gas of the internal combustion engine, and withstands the test of harsh conditions such as thermal cycles with a temperature difference of several hundred de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C22C38/18C22C38/02C22C38/04C21C7/068C21C7/10C21C7/06C21C7/00C22C33/06
CPCC22C38/06C22C38/005C22C38/18C22C38/02C22C38/04C22C38/002C21C7/068C21C7/10C21C7/06C21C7/0006C21C7/0056C22C33/06
Inventor 王忠英于桂玲王启丞
Owner 国研(淮安)新材科技有限公司
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