Alfinated coating structure on HS6-5-2 (SW7M) high speed steel

• Authors: Pietrowski S. , Szymczak T.
• Languages of publication: EN

Abstracts

EN

The paper presents the results of immersion alfinated coating structure in AlSi5 silumin on HS6-5-2 (SW7M) high speed steel. Alfinating bath temperature was 750 ± 5 ° C, time of sample immersion was τ = 180s. Thickness of obtained coating under specified conditions was g = 150μm. Manufactured coating consists of three layers of different construction phase. The first layer from the substrate „g1`” constructed with a AlFe phase consist of alloy additives constituents of HS6-5-2 (SW7M) steel: W, Mo, V, Cr and Si. On it crystallizes the second layer „g<sub>1``</sub>” of AlFeWMoCr intermetallic phases also containing Si and small amount of V. Last, the outer layer „g<sub>2</sub> of the coating is composed with silumin including AlFeWMoCrVSi intermetallic phases. Within all layers of the coating occurs carbides. Penetration of carbides to individual coating layers is mainly due to steel surface partial melting and crystallizing layers „g<sub>1`</sub>” and „g_1``” by alfinating liquid and shifting into her of carbides as well as partial carbides rejection by crystallization front of intermetallic phases occurs in coating.

Keywords

EN

Innovative cast technologies; alfinating; high-speed steel; silumin; carbides

PL

technologie innowacyjne; stal szybkotnąca; siluminy; węgliki

• Publisher: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Journal: Archives of Foundry Engineering
• Year: 2010
• Volume: Vol. 10, iss. 4
• Pages: 191--198
• Physical description: Bibliogr. 4 poz., fot., rys., tab.

Contributors

author

Pietrowski S.

• Technical University of Łódź, Department of Materials Engineering and Production Systems, Stefanowskiego 1/15 Street, 90-924 Łódź, Poland

author

Szymczak T.

• Technical University of Łódź, Department of Materials Engineering and Production Systems, Stefanowskiego 1/15 Street, 90-924 Łódź, Poland

References

• [1] T. Szymczak: Model of coat increase on iron alloys hot dip obtained in Al-Si bath and its connection with multicompo-nent silumins, PhD Thesis, Technical University of Łódź, 2007 (in Polish).
• [2] S. Pietrowski, T. Szymczak: The structure of the alphinizing coat on alloy steels, Archives of Foundry Engineering, vol. 8, issue 4, 2008 (in Polish).
• [3] L. Dobrzański: Engineering materials and material planning, WNT, Warszawa, 2006 (in Polish).
• [4] T. Malkiewicz: Metal science of iron-base alloy, PWN, Warzszawa-Kraków, 1976 (in Polish).