Investigation of wear behavior of borided AISI D6 steel

Abstract

We have investigated the effect of the boriding process on the wear behavior of AISI D6 steel. The boride layer was characterized by light microscopy, X-ray diffraction and micro-Vickers hardness testing. The X-ray diffraction analysis of the boride layers on the surface of the steels revealed the existence of the FeB, Fe2B, CrB and Cr2B compounds. Depending on the chemical composition of the substrates, the boride-layer thickness on the surface of the AISI D6 steel was found to be 164.42 μm. The hardness of the boride compounds formed on the surface of the steels ranged from 1672 HV0.05 to 2118 HV0.05, whereas the Vickers hardness value of the untreated steels was 584 HV0.05. The wear tests were carried out using a ball-disc arrangement under dry-friction conditions at room temperature with an applied load of 10 N and a sliding speed of 0.3 m/s for a sliding distance of 1000 m. It was observed that the wear rate of the borided and unborided AISI D6 steel ranged from 1.28 × 10 -6 to 81.2 × 10 -6 mm 3 /Nm. Keywords: AISI D6, boriding, micro-hardness, friction coefficient, wear rate V {tudiji je bil preiskovan vpliv postopka boriranja na obrabo jekla AISI D6. Borirana plast je bila pregledana s svetlobno mikroskopijo, z rentgensko difrakcijo in izmerjena je bila mikrotrdota po Vickersu. Rentgenska difrakcijska analiza borirane plasti je pokazala prisotnost spojin FeB, Fe2B, CrB in Cr2B. Odvisno od kemijske sestave podlage je bila debelina borirane plasti na jeklu AISI D6 164,42 μm. Trdota boridov, nastalih na povr{ini jekla, je bila med 1672 HV0,05 do 2118 HV0,05, pri~emer je bila trdota neobdelanega jekla po Vickersu 584 HV0,05. Preizkusi obrabe so bili izvedeni na sestavu kroglica-plo{~a, pri pogojih suhega trenja pri sobni temperaturi, z uporabljeno obremenitvijo 10 N, s hitrostjo drsenja 0,3 m/s in potjo drsenja 1000 m. Ugotovljeno je, da je hitrost obrabe boriranega in neboriranega jekla AISI D6 v obmo~ju od 1,28 × 10 -6 do 81,2 × 10 -6 mm 3 /Nm.

Corrosion Behavior and Microstructure of Borided Tool Steel

“…Therefore, there has been extensive research on the development of surface treatment processes to improve the corrosion, wear and oxidation resistance of the cold work tool steels for high-temperature and high-pressure applications in recent years [1][2][3][4][5][6][7].…”

Microstructural Characterization and Corrosion-Resistance of Borided Rebar

“…Therefore, they are required to be exposed to temperatures and times as low as possible in steels. In addition, the boride layer thicknesses to be obtained with the increase in the temperature and duration of the boriding increase more [34][35][36][37]. Thus, it closes micro cracks on rebar and reduces its corrosion rate.…”

Surface modification method of duplex type stainless steels by the pack boriding process

“…The super duplex stainless steels contain several alloying elements such as chromium, nickel, manganese and molybdenum, which also reacts with boron and reduce the thickness of the iron boride layer [15]. Effects of the boronizing method on wear characteristics and the friction behavior were investigated on the Din 20 MoCr 4 steel material showing the hardness of the formed boride layer in the range 1475 to 1848 HV 0.05 , while FeB and Fe 2 B were observed on the surface of the material [16]. Many dual process treatments were also attempted like plasma nitriding, nitroboronizing, alumina boronizing and boronitrocarburizing [17].…”