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

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 Effect of impact energy on wear behavior of high chromium white iron produced by liquid die forging

2018 ◽  
Vol 207 ◽  
pp. 03011
Author(s):  
B Qiu ◽  
S M Xing ◽  
Q Dong ◽  
H Liu
Keyword(s):  
Abrasive Wear ◽  
Impact Energy ◽  
Wear Behavior ◽  
Testing Machine ◽  
Wear Testing ◽  
Volume Loss ◽  
White Iron ◽  
High Chromium ◽  
Die Forging ◽  
The Impact

Impact abrasive wear behavior of high chromium white iron (HCWI) produced by liquid die forging process were investigated. the wear tests were performed with the MLD-10 abrasive wear testing machine, using SiO2 abrasive and with four impact energies of 1.5 J, 2.5 J, 3.5 J and 4.5 J for 120 min. The results indicated that the cumulative volume loss of HCWI sample increases with the growth of impact energy, and exhibits best wear resistance under low impact condition. For given impact energy, the volume loss increases with the increasing of wear time, which shown an approximately liner tendency. The macro-morphologies, SEM images of worn surface and cross-sectional images of wear samples were observed by optical microscope and SEM, and the wear mechanism and characteristics were analyzed. Results shown that the wear characteristics is mainly based on the shallow ploughing and accompanied by plastic deformation under lower impact energy, while the fatigue peeling and embedded abrasive become the most significant characteristics when the impact energy is higher.

Abrasive wear behavior and mechanism of high chromium cast iron

2015 ◽  
Vol 22 (1) ◽  
pp. 84-90 ◽  
Author(s):  
Ting Sun ◽  
Ren-bo Song ◽  
Xu Wang ◽  
Peng Deng ◽  
Chun-jing Wu
Keyword(s):  
Cast Iron ◽  
Abrasive Wear ◽  
Wear Behavior ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Abrasive Wear Behavior ◽  
Chromium Cast Iron

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.

The Wear Behavior of Shots Impeller Pair in Shot Blast Cleaning

2013 ◽  
Vol 364 ◽  
pp. 37-41 ◽  
Author(s):  
Ling Hui Song ◽  
Shou Ren Wang ◽  
Ying Zi Wang ◽  
Pei Long Song ◽  
Guang Ji Xue
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Investment Casting ◽  
Wear Behavior ◽  
Shot Blasting ◽  
High Chromium ◽  
Casting Technology ◽  
Abrasive Wear Behavior ◽  
Materials Used ◽  
The Ideal

This article discussed the compound impact-abrasive wear behavior of shots impeller pair in shot blast cleaning. The shots impeller pairs were fabricated by investment casting processing. The predominance and shortcoming of investment casting for high chromium wear resistance materials used in shot blasting machine were also analyzed. Using investment casting technology, the high-Cr iron casting would be improvement in interal and explicit quality. And, owing to different included angles of shots, the blade show different wear behavior. The ideal included angle of shots is 12o. Increase in the angles leads to decreases of the wear resistance.

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