请输入您要查询的百科知识：

　

词条 Ferroaluminum
释义

  1. Manufacturing process

  2. Chemical Composition

  3. Physical Properties

  4. References

Ferroaluminum (FeAl) is a ferroalloy, consisting of iron and aluminium. The metal usually consists of 40% to 60% aluminium and applications of ferroaluminum include the deoxidation of steel,[1] hardfacing applications, reducing agent, thermite reactions, AlNiCo magnets, and alloying additions to welding wires and fluxes.[2] The alloy is also known for the ability to manufacture low melting point alloys and its ability to carry out aluminothermic welding. Ferroaluminum does not currently have a CAS Registry Number. The presence of iron in aluminum helps in the decrease of casting defects. improves tensile, yield, hardness, and maintains strength at high temperatures.[3] The first recorded usage of the word "ferroaluminum" was in 1887.[4][5] Ferroaluminum is also used in the process of nitriding, which is a heat treating process that diffuses nitrogen into the surface of a metal to create a case-hardened surface. The aluminum provided in the alloy helps with this process.[6][7][8] The majority of the world's ferroaluminum is produced by Australia, China, Russia, the US and Canada, with the cost of electricity being the main factor in the aluminium obtaining process.[9][10]

Manufacturing process

Ferroaluminum is manufactured in an electricity-intensive process that involves three steps. First, aluminium oxide (Al2O3) is obtained through the Bayer process by digestion of bauxite with sodium hydroxide (NaOH) at about 240 °C. Second, the aluminium oxide is subjected to a Hall electrolytic process together with cryolite to obtain aluminium that will then be combined with iron to create the ferroaluminum. Last, after the solidification of the metal, milling and sieving processes are carried out, which obtains the suitable particle size for its applications.[9]

Chemical Composition

Chemical Composition of Ferroaluminum[1]
ElementContent
Silicon, Simaximum of 2%
Aluminum, Al40% to 60%
Carbon, Cmaximum of 0.50%
Sulfur, Smaximum of 0.10%
Phosphorus, Pmaximum of 0.10%
Iron, Femain constituent

Physical Properties

Physical Properties of Ferroaluminum[1]
PropertiesMetricImperial
Melting Point1160 °C at 60% Al

1250 °C at 40% Al

2120 °F at 60% Al

2282 °F at 40% Al

References

1. ^1 2 {{Cite web|url=http://www.millerandco.com/products/alloys-for-steel-foundries/aluminium/ferro-aluminium/|title=Ferro Aluminium|last=|first=|date=|website=Miller and Co|archive-url=|archive-date=|dead-url=|access-date=October 20, 2018}}
2. ^{{Cite web|url=https://www.reade.com/products/ferro-aluminum-feal-powder|title=Ferro Aluminum (FeAl) Powder|last=|first=|date=|website=Reade Advanced Materials|archive-url=|archive-date=|dead-url=|access-date=October 20, 2018}}
3. ^{{Cite web|url=https://www.belmontmetals.com/product/30-ferro-aluminum/|title=30% Ferro Aluminum|last=|first=|date=|website=Belmont|archive-url=|archive-date=|dead-url=|access-date=October 20, 2018}}
4. ^{{Cite web|url=https://www.dictionary.com/browse/ferroaluminum|title=ferroaluminum|last=|first=|date=|website=Dictionary.com|archive-url=|archive-date=|dead-url=|access-date=October 20, 2018}}
5. ^{{Cite web|url=https://www.merriam-webster.com/dictionary/ferroaluminum|title=ferroaluminum|last=|first=|date=|website=Merriam-Webster Dictionary|archive-url=|archive-date=|dead-url=|access-date=October 20, 2018}}
6. ^{{cite journal|last1=Meka|first1=S.R.|last2=Chauhan|first2=A.|last3=Steiner|first3=T.|last4=Bischoff|first4=E.|last5=Ghosh|first5=P.K.|last6=Mittemeijer|first6=E.J.|year=2015|title=Generating duplex microstructures by nitriding; nitriding of iron based Fe–Mn alloy|journal=Materials Science and Technology|volume=|pages=1743284715Y.000|doi=10.1179/1743284715Y.0000000098}}
7. ^{{Cite web|url=http://ariamoly.com/En/main/product/production-1/ferro-aluminum/|title=Ferro Aluminum|last=|first=|date=|website=Aria Ferroalloy Co|archive-url=|archive-date=|dead-url=|access-date=October 20, 2018}}
8. ^{{Cite web|url=https://patents.google.com/patent/US1718685A/en|title=Patent US1718685A - Ferro-aluminum alloy and method of making it|last=De Vries|first=Ralph P.|last2=De Fries|first2=Henry A.|date=June 25, 1929|website=Google Patents|archive-url=|archive-date=|dead-url=|access-date=October 20, 2018}}
9. ^1 {{Cite web|url=http://www.cometalsa.com/download.php?id=1380|title=Ferro Aluminium Description and Uses|last=|first=|date=|website=Cometal|archive-url=|archive-date=|dead-url=|access-date=October 20, 2018}}
10. ^{{Cite web|url=http://www.wbrl.co.uk/ferro-aluminium.html|title=Ferro Aluminium|last=|first=|date=|website=Westbrook Resources|archive-url=|archive-date=|dead-url=|access-date=October 20, 2018}}

1 : Ferrous alloys
随便看

　

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。

　

Copyright © 2023 OENC.NET All Rights Reserved
京ICP备2021023879号 更新时间：2024/9/26 0:31:44