Vanadium Additions to a High-Cr White Iron and its Effects on the Abrasive Wear Behavior.

MRS Advances ◽  
2020 ◽  
Vol 5 (59-60) ◽  
pp. 3077-3089
Author(s):  
Alexeis Sánchez ◽  
Arnoldo Bedolla-Jacuinde ◽  
Francisco V. Guerra ◽  
I. Mejía
Keyword(s):  
Heat Treatment ◽  
Abrasive Wear ◽  
Volume Fraction ◽  
Wear Behavior ◽  
Wear Behaviour ◽  
White Iron ◽  
Heat Treated ◽  
Bulk Hardness ◽  
Abrasive Wear Behavior ◽  
Vanadium Carbides

AbstractFrom the present study, vanadium additions up to 6.4% were added to a 14%Cr-3%C white iron, and the effect on the microstructure, hardness and abrasive wear were analysed. The experimental irons were melted in an open induction furnace and cast into sand moulds to obtain bars of 18, 25, and 37 mm thickness. The alloys were characterized by optical and electronic microscopy, and X-ray diffraction. Bulk hardness was measured in the as-cast conditions and after a destabilization heat treatment at 900°C for 45 min. Abrasive wear resistance tests were undertaken for the different irons according to the ASTM G65 standard in both as-cast and heat-treated conditions under a load of 60 N for 1500 m. The results show that, vanadium additions caused a decrease in the carbon content in the alloy and that some carbon is also consumed by forming primary vanadium carbides; thus, decreasing the eutectic M7C3 carbide volume fraction (CVF) from 30% for the base iron to 20% for the iron with 6.4%V;but overall CVF content (M7C3 + VC) is constant at 30%. Wear behaviour was better for the heat-treated alloys and mainly for the 6.4%V iron. Such a behaviour is discussed in terms of the CVF, the amount of vanadium carbides, the amount of martensite/austenite in matrix and the amount of secondary carbides precipitated during the destabilization heat treatment.

scholarly journals Niobium Additions to a 15%Cr–3%C White Iron and Its Effects on the Microstructure and on Abrasive Wear Behavior

Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1321 ◽  
Author(s):  
Arnoldo Bedolla-Jacuinde ◽  
Francisco Guerra ◽  
Ignacio Mejia ◽  
Uzzi Vera
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Abrasive Wear ◽  
Volume Fraction ◽  
Wear Behavior ◽  
Solidification Process ◽  
White Iron ◽  
Bulk Hardness ◽  
Abrasive Wear Behavior ◽  
Cast Alloys

From the present study, niobium additions of 1.79% and 3.98% were added to a 15% Cr–3% C white iron, and their effects on the microstructure, hardness and abrasive wear were analyzed. The experimental irons were melted in an open induction furnace and cast into sand molds to obtain bars of 45 mm diameter. The alloys were characterized by optical and electron microscopy, and X-ray diffraction. Bulk hardness was measured in the as-cast conditions and after a destabilization heat treatment at 900 °C for 30 min. Abrasive wear resistance tests were undertaken for the different irons according to the ASTM G65 standard in both as-cast and heat-treated conditions under three loads (58, 75 and 93 N). The results show that niobium additions caused a decrease in the carbon content in the alloy and that some carbon is also consumed by forming niobium carbides at the beginning of the solidification process; thus decreasing the eutectic M7C3 carbide volume fraction (CVF) from 30% for the base iron to 24% for the iron with 3.98% Nb. However, the overall carbide content was constant at 30%; bulk hardness changed from 48 to 55 hardness Rockwell C (HRC) and the wear resistance was found to have an interesting behavior. At the lowest load, wear resistance for the base iron was 50% lower than that for the 3.98% Nb iron, which is attributed to the presence of hard NbC. However, at the highest load, the wear behavior was quite similar for all the irons, and it was attributed to a severe carbide cracking phenomenon, particularly in the as-cast alloys. After the destabilization heat treatment, the wear resistance was higher for the 3.98% Nb iron at any load; however, at the highest load, not much difference in wear resistance was observed. Such a behavior is discussed in terms of the carbide volume fraction (CVF), the amount of niobium carbides, the amount of martensite/austenite in matrix and the amount of secondary carbides precipitated during the destabilization heat treatment.

Mechanical and Abrasive Wear Behaviour of Waste Silk Fiber Reinforced Epoxy Biocomposites Using Taguchi Method

2019 ◽  
Vol 969 ◽  
pp. 787-793
Author(s):  
S.M. Darshan ◽  
Bheemappa Suresha
Keyword(s):  
Abrasive Wear ◽  
Wear Behavior ◽  
Silk Fiber ◽  
Wear Behaviour ◽  
Silk Fibers ◽  
Weight Percentage ◽  
Fiber Loading ◽  
Abrasive Wear Behavior ◽  
Static Mechanical ◽  
Abrasive Wear Behaviour

The aim of this research article is to study the static mechanical properties and abrasive wear behavior of epoxy biocomposites reinforced with different weight percentage of waste silk fibers. The effect of parameters such as velocity (A), load (B), fiber loading (C) and abrading distance (D) on abrasive wear has been considered using Taguchi's L25 orthogonal array. The objective is to examine parameters which significantly affect the abrasive wear of biocomposites. The addition of silk fiber has resulted in improved flexural properties of the epoxy matrix. The results of ANOVA indicated that the parameter which played a significant role was abrading distance followed by fiber loading, load and sliding velocity.

Effects of tungsten on the microstructure and on the abrasive wear behavior of a high-chromium white iron

Wear ◽  
2017 ◽  
Vol 376-377 ◽  
pp. 77-85 ◽  
Author(s):  
E. Cortés-Carrillo ◽  
A. Bedolla-Jacuinde ◽  
I. Mejía ◽  
C.M. Zepeda ◽  
J. Zuno-Silva ◽  
...  
Keyword(s):  
Abrasive Wear ◽  
Wear Behavior ◽  
White Iron ◽  
High Chromium ◽  
Abrasive Wear Behavior

scholarly journals Abrasive Wear Behavior of Heat-Treated ABC-Silicon Carbide

2003 ◽  
Vol 86 (8) ◽  
pp. 1370-1378 ◽  
Author(s):  
Xiao Feng Zhang ◽  
Gun Y. Lee ◽  
Da Chen ◽  
R. O. Ritchie ◽  
Lutgard C. Jonghe
Keyword(s):  
Silicon Carbide ◽  
Abrasive Wear ◽  
Wear Behavior ◽  
Heat Treated ◽  
Abrasive Wear Behavior

Effect of the simultaneous Ti and W addition on the microstructure and wear behavior of a high chromium white cast iron

2019 ◽  
Vol 116 (6) ◽  
pp. 602 ◽  
Author(s):  
Francisco Vapeani Guerra ◽  
Arnoldo Bedolla-Jacuinde ◽  
Jorge Zuno-Silva ◽  
Ignacio Mejia ◽  
Edgar Cardoso-Legorreta ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Abrasive Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
Abrasive Wear Resistance ◽  
Carbide Formation ◽  
The Matrix ◽  
Bulk Hardness ◽  
Primary Carbides

The present work analyzes the effect of 0.7%Ti and 1.7%W addition to a 17% chromium white iron in as-cast condition and after destabilization heat treatment. These alloys are commonly used in applications where a high abrasive wear resistance is required. For this reason, in addition to the characterization, a complementary wear test was performed. The alloys were characterized by optical and electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. The simultaneous Ti and W addition promoted the (Ti,W)C primary carbides formation which grow in the early stages of solidification. These carbides were found well distributed in the iron matrix with an average hardness value of 2450 HV. Moreover, tungsten was found partially distributed in the different phases increasing the microhardness by solid solution and refining the eutectic carbide. These microstructural modifications resulted in the increase of the bulk hardness and abrasive wear resistance of the alloyed iron. After destabilization heat treatment, the carbide precipitation and the matrix transformation produced a secondary hardening reducing the wear losses. Based in the results of the present study, the simultaneous addition of these elements to promote the (Ti,W)C carbide formation during solidification represents an effective method to increase the hardness and wear resistance of these kind of alloys via small additions.

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