Microstructural evolution upon10-wt% mo alloying and laser surface melting of M2 high speed steels hardfacings

Ali Dilawary Shaikh Asad*, Motallebzadeh Amir, Houdkova Sarka, Cimenoglu Huseyin

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Özet

The article aims to comprehend the microstructural changes, in Plasma Transfer Arc (PTA) deposited M2 high speed steel (HSS) hardfacings upon incorporation of 10wt% Mo alloying during deposition followed by laser surface melting. PTA deposited hardfacings were produced over 4140 steel. Then Mo alloyed and unalloyed PTA deposits were subjected to laser surface melting (LSM) process. A comprehensive microstructural characterization for all the resultant structures was carried out. Optical metallography using appropriate etching reagents and SEM microscopy in conjunction with XRD techniques were employed to ascertain the matrix structure and carbides morphology. The PTA microstructure was close to equilibrium structure of M2 HSS containing mixture of ferrite austenite martensite along with MC, M2C and M6C type carbides. While the LSM of M2 HSS caused higher fraction of martensite and finer grains in the structure resulting in increment in hardness. 10-wt% Mo addition changes the carbides from MC and rod like M2C to fibrous M2C and fishbone like M6C carbides. The LSM of Mo alloyed M2 HSS PTA deposits led to an overall decrease in the fraction of M6C carbides and fibrous M2C carbides accompanied by a decrease in hardness.

Orijinal dilİngilizce
Ana bilgisayar yayını başlığıAdvanced Materials - XVI - Selected peer-reviewed full text research paper from the 6th International Symposium on Advanced Materials, ISAM 2019
EditörlerMuhammad Muneeb Asim, Mustasim Billah Bhatty, Muhammad Mansoor, Tahir Ikram
YayınlayanTrans Tech Publications Ltd
Sayfalar346-356
Sayfa sayısı11
ISBN (Basılı)9783035735895
DOI'lar
Yayın durumuYayınlandı - 2021
Etkinlik16th International Symposium on Advanced Materials, ISAM 2019 - Islamabad, Pakistan
Süre: 21 Eki 201925 Eki 2019

Yayın serisi

AdıKey Engineering Materials
Hacim875 KEM
ISSN (Basılı)1013-9826
ISSN (Elektronik)1662-9795

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???event.eventtypes.event.conference???16th International Symposium on Advanced Materials, ISAM 2019
Ülke/BölgePakistan
ŞehirIslamabad
Periyot21/10/1925/10/19

Bibliyografik not

Publisher Copyright:
© 2021 Trans Tech Publications Ltd, Switzerland.

Finansman

The authors would like to thank Senmak Co., Turkey, for the provision of PTA facility, and Mr Laudia (New Technology Research Centre, University of West Bohemia, Plzeň, Czech Republic) for his assistance during optical metallography. The PhD study grant by the Higher education commission (HEC) of Pakistan for Mr. Shaikh Asad Ali Dilawary at Istanbul Technical University, Turkey is also gratefully acknowledged.

FinansörlerFinansör numarası
Higher Education Commission, Pakistan

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