Search results
Results from the WOW.Com Content Network
Ferroboron (CAS Registry Number 11108–67-1) is a ferroalloy of iron and boron with boron content between 17.5 and 20%.[1]It is manufactured either by carbothermic reduction of boric acid in an electric arc furnace together with carbon steel, or by the aluminothermic reduction of boric acid in the presence of iron.
Boron is effective at very low concentrations – 30 ppm B can replace an equivalent 0.4% Cr, 0.5% C, or 0.12% V. [2] 30 ppm B has also been shown to increase depth of hardening (~ +50%) in a low-alloy steel – thought to be due to its retardation of austenite decomposition to softer bainite, ferrite, or pearlite structures on cooling from an ...
Silicon ferroalloy consumption is driven by cast iron and steel production, where silicon alloys are used as deoxidizers. Some silicon metal was also used as an alloying agent with iron. On the basis of silicon content, net production of ferrosilicon and miscellaneous silicon alloys in the US was 148,000 t in 2008.
Iron borides can be formed by thermochemically reacting boron rich compounds on an iron surface to form a mixture of iron borides, in a process known as boriding.There are a number of ways of forming boride coatings, including gas boriding, molten salt boriding, and pack boriding. [6]
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
On Dec. 6, the family received a phone call from immigration authorities and they were told to report to an office in Greenspoint, Texas, four days later to discuss Salazar-Hinojosa's case ...
First, the alloy materials are combined in a ball mill and ground to a fine powder. A hot isostatic pressing (HIP) process is then applied to simultaneously compress and sinter the powder. A final heat treatment stage helps remove existing internal stresses produced during any cold compaction [ broken anchor ] which may have been used.