Aluminizing of the Cr15Al5 alloy surface by hot-dipping in the melt

International Workshop "Advanced Technologies in Material Science, Mechanical and Automation Engineering – MIP: Engineering – 2019"

材料科学;机械制造;原子能学

Shmorgun, V.G.^1 ; Bogdanov, A.I.^1 ; Slautin, O.V.^1 ; Kulevich, V.P.^1

Volgograd State Technical University, Lenina ave., 28, Volgograd

400005, Russia^1

关键词: Alloy surfaces;    Hot dipping;    Hot dips;    Interlayer boundaries;    Iron aluminides;    Molten baths;    Silumins;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/537/2/022069/pdf
DOI  :  10.1088/1757-899X/537/2/022069

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The diffusion interaction at the interlayer boundary of the Cr15Al5 alloy during aluminizing by hot-dip in a molten bath of AK12M2 silumin is investigated. It is shown that subsequent heat treatment at 1000 °C leads to the formation on the surface of the Cr15Al5 alloy a coating of variable composition based on iron aluminides FeAl(Cr, Si) / Fe3Al(Cr, Si) / Fe(Al, Cr, Si). Grain growth in the Cr15Al5 alloy and a decrease in the density of carbide inclusions with their segregation along the grain boundaries ensures a decrease in its microhardness compared to as-received condition from 2.1 to 1.6 GPa.