Investigation on Tribological Behavior of Ductile Cast Irons With Nanosized Particles

Abstract

<jats:p>The work in this study is focused on investigation of the tribological behavior of ductile cast iron with nanosized particles: titanium nitride TiN; titanium nitride 30% + titanium carbonitride 70% (30%TiN+70%TiCN). The ductile cast iron composition is: Fe-3,55C-2,67Si-0,31Mn-0,009S-0,027P-0,040Cu-0,025Cr-0,08Ni-0,06Mg wt%. Before the addition to the melt nanosized particles were coated with nickel by the electroless nickel deposition method EFFTOMNICKEL .The nickel coating on the nanosized particles ensures their wetting in the melt as well as their uniform distribution into the cast. The optical and quantity metallographic observations and wear test are performed to study the influence of the nanoparticle additives on the cast iron tribological properties. It is observed that the quantity proportion changes between pearlite, ferrite and graphite phase in the cast iron structure. The graphite shape is retained the same, but the nanosized additives decrease the average diameter of the graphite spheres Dmid and increase the quantity of the graphite phase in the structure of ductile cast irons. The cast iron wear resistance in the presence of nanosized additives of (TiN+TiCN) and TiN increases to 55–69% in comparison to wear resistance of the cast iron without nanoparticles.</jats:p>

Microstructure and Tensile Properties of Graphite Ductile Iron Improved by Minor Amount of Dual‐Phased TiC–TiB2 Nanoparticles

“…However, few researchers have extended this concept to refining the as‐cast microstructure of DIs in recent years. Kaleicheva et al [ 20 ] added TiN and a mixture of 30% TiN and 70% TiCN nanoparticles into a DI. The nanoparticles were coated by a nickel deposition method to improve the dispersibility of nanoparticles in the melt.…”

Bainitic Cast Irons with Nanosized Particles

“…For lower bainitic samples obtained after austempering for 2 hours at 280°C, an impact toughness test (EN ISO 148-1) and an abrasion wear test are performed. The experimental study of is carried out using a method and device for accelerated testing in a kinematic thumb-disc scheme under friction over a fixed abrasive [5]. The impregnated Corundum 220 material is used for samples.Test basic parameters of the wear test are:…”

Pearlitic structure and wear properties of graphite cast iron reinforced with biphase TiC-TiB2 nanoparticles

“…At present, few studies have been conducted to understand the roles of nanosized ceramic particles on the properties of ductile iron. Kaleicheva J et al [24] investigated the tribological behavior of ductile iron with nano-sized TiN particles and TiN-TiCN particles. Both could decrease the average diameter of graphite nodules and increase the quantity of graphite nodules in the matrix without any degradations on nodularity.…”