Influence of NbC Addition on the Sintering Behaviour of Medium Carbon PM Steels

In this work, the effects of NbC additions on the microstructure and mechanical properties were examined. In order to do this, NbC compounds were added into the Fe matrix at the weight percentage of 0.1–2 with individually to obtain powder mixture. The microstructure of the powder metallurgy (PM) steels were characterized by optic microscope, scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). Experimental results indicated that NbC alloyed steels can be produced by PM technology. An increase in strength was observed when the amount of NbC compounds increased for all PM steels. The precipitation of carbides and nitrides in these steels limits austenite grain growth and increases the precipitation hardening or clustering hardening that results in significant improvement in strength.

[1]  Xueyun Gao,et al.  Effect of lanthanum on the precipitation and dissolution of NbC in microalloyed steels , 2017 .

[2]  S. Gündüz,et al.  Effect of vanadium addition on the microstructure and mechanical properties of low carbon micro-alloyed powder metallurgy steels , 2016 .

[3]  D. Khanduja,et al.  Tribological and mechanical behavior of particulate aluminum matrix composites , 2014 .

[4]  S. Gündüz,et al.  Microstructural characterization and mechanical properties of microalloyed powder metallurgy steels , 2014 .

[5]  E. Pereloma,et al.  Effect of niobium clustering and precipitation on strength of an NbTi-microalloyed ferritic steel , 2014 .

[6]  毛新平,et al.  Effect of Annealing Temperature on Recrystallization Behavior of Cold Rolled Ti-Microalloyed Steel , 2013 .

[7]  R. Chandramouli,et al.  Tensile and impact behaviour of sinter-forged Cr, Ni and Mo alloyed powder metallurgy steels , 2009 .

[8]  R. Dkiouak,et al.  Characterization of deformation stability of medium carbon microalloyed steel during hot forging using phenomenological and continuum criteria , 2008 .

[9]  Wang Jing,et al.  Production of (Ti,V)C reinforced Fe matrix composites , 2007 .

[10]  T. Mannering,et al.  The application of stereological analysis in understanding differences in toughness of V- and Nb-microalloyed steels of similar yield strength , 2006 .

[11]  R. Misra,et al.  Microstructure and texture of hot-rolled Cb-Ti and V-Cb microalloyed steels with differences in formability and toughness , 2003 .

[12]  W. Kasprzak,et al.  The effect of silicon, vanadium and nitrogen on the microstructure and hardness of air cooled medium carbon low alloy steels , 2003 .

[13]  M. K. Surappa,et al.  Aluminium matrix composites: Challenges and opportunities , 2003 .

[14]  Yunliu Yang,et al.  High temperature creep behavior of in-situ TiC particulate reinforced Fe–Cr–Ni matrix composite , 2000 .

[15]  J. Hawk,et al.  Wear of titanium carbide reinforced metal matrix composites , 1999 .

[16]  L. Cuddy,et al.  Austenite grain coarsening in microalloyed steels , 1983 .

[17]  N. Eustathopoulos,et al.  The wetting of carbon by aluminium and aluminium alloys , 1974 .

[18]  Salah U. Hamim,et al.  Carbon fiber reinforced metal matrix composites: Fabrication processes and properties , 2017 .

[19]  J. A. Sago.  Metal injection molding of alloys for implantable medical devices , 2012 .

[20]  R. Doherty,et al.  MICROSTRUCTURE AND MECHANICAL PROPERTIES OF PM STEELS ALLOYED WITH SILICON AND VANADIUM , 2012 .

[21]  R. Doherty,et al.  MICROSTRUCTURE AND MECHANICAL PROPERTIES OF MICROALLOYED PM STEELS , 2011 .

[22]  Wei Gong,et al.  Microstructure and wear-resistance of Fe–(Ti,V)C composite , 2007 .

[23]  S. Gündüz,et al.  Influence of cooling rate and tempering on precipitation and hardness of vanadium microalloyed steel , 2005 .

[24]  S. Saritaş,et al.  EFFECT OF MICROSTRUCTURAL INHOMOGENEITIES ON THE FATIGUE CRACK GROWTH RESPONSE OF A PREALLOYED AND TWO HYBRID P/M STEELS , 2002 .

[25]  T. Gladman.  The Physical Metallurgy of Microalloyed Steels , 1997 .