Effect of cooling conditions on microstructure evolution and wear behavior of high chromium cast iron hardfacing layer

2021 ◽  
pp. 131417
Author(s):  
Jingli Zhang ◽  
Jianjun Wei ◽  
Shizhong Wei ◽  
Zhiquan Huang ◽  
Wei Wei ◽  
...  
Keyword(s):  
Cast Iron ◽  
Microstructure Evolution ◽  
Wear Behavior ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Cooling Conditions ◽  
Chromium Cast Iron

Microstructural Characterization, Tribological and Corrosion Behaviour of Forged and Cast Grinding Balls a Comparative Study

2021 ◽  
Vol 406 ◽  
pp. 334-347
Author(s):  
Khedidja Bouhamla ◽  
Amel Gharbi ◽  
Oualid Ghelloudj ◽  
Ali Hadji ◽  
Maouche Hichem ◽  
...  
Keyword(s):  
Cast Iron ◽  
Comparative Study ◽  
Wear Behavior ◽  
Corrosion Behaviour ◽  
Wear Behaviour ◽  
High Chromium ◽  
Grinding Balls ◽  
Corrosion Tests ◽  
High Chromium Cast Iron ◽  
Chromium Cast Iron

Various facilities are used in mineral processing to prepare raw material. Practically, two types of balls are used, cast balls and forged balls. They are respectively made from high chromium cast iron and forged steel and are supplied in different sizes and chemical compositions. The cast and forged balls have different microstructures and consequently display dissimilar wear behavior. The target aimed in this work is to achieve a comparative study taking into account the type of microstructure, mechanical properties, and wear behavior of these two kinds of materials. Specimens have undergone chemical, metallographic and XRD characterizations. Subsequently, these samples were subjected to hardness measurements, abrasion and friction tests in order to evaluate their wear behaviour. Tribological tests, under unlubricated environment, are carried out on both types of grinding balls in order to study the wear system. Corrosion tests are also performed on forged steel and high chromium cast iron ball samples. The obtained results reveal a large difference in terms of chemical composition and microstructural components. Chromium cast iron balls are more resistant to friction, whereas forged balls are more resistant to abrasion. Additionally, the corrosion tests reveal a narrow discrepancy in corrosion behaviour between the studied materials.

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

EFFECT OF CARBON CONTENT ON MICROSTRUCTURE EVOLUTION AND PROPERTIES OF HYPEREUTECTIC HIGH CHROMIUM CAST IRON

2021 ◽  
pp. 2150086
Author(s):  
QIANG GUO ◽  
HANGUANG FU ◽  
XINGYE GUO ◽  
ZHENGUO XING ◽  
JIAN LIN
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Carbon Content ◽  
Microstructure Evolution ◽  
Fine Particles ◽  
Volume Fraction ◽  
Fatigue Wear ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Chromium Cast Iron

This study is to reveal the influence of the amount of carbon content on the microstructure evolution, mechanical properties, and wear properties of Hypereutectic High Chromium Cast Iron (HHCCI). The results indicated that the carbon content plays a key role in the regulation of carbides in the cast iron microstructure. As the amount of carbon content rises, the primary carbides in the cast iron microstructure become apparently coarser, and the volume fraction of carbides gradually increases. The carbide volume fraction reaches 62% when the carbon content is 5[Formula: see text]wt.%. When the value of the carbon content increases, the accumulation and growth of eutectic carbides in the heat-treated cast iron become more and more obvious. After heat treatment, a large number of secondary carbides will be precipitated from the austenite matrix, in the form of fine particles or short rods, with a dispersed distribution. The macroscopic hardness of HHCCI has increased. When the carbon content is 3.5[Formula: see text]wt.%, the macroscopic hardness is 61.2 HRC, and when the carbon content becomes 5[Formula: see text]wt.%, it reaches 64.3 HRC. The wear resistance of HHCCI increases with the value of the carbon content increases. When the carbon content was increased from 3.5[Formula: see text]wt.% to 5.0[Formula: see text]wt.%, the wear resistance of the material increased by 85.7%. The wear of HHCCI is mainly adhesive wear and fatigue wear, and the wear morphology is mainly spalling pits and wear debris.

scholarly journals Abrasion Wear Behavior of High-chromium Cast Iron

2016 ◽  
Vol 16 (2) ◽  
pp. 69-74 ◽  
Author(s):  
M. Pokusová ◽  
A. Brúsilová ◽  
Ľ. Šooš ◽  
I. Berta
Keyword(s):  
Cast Iron ◽  
Abrasion Resistance ◽  
Wear Behavior ◽  
Cutting Tools ◽  
Cast Irons ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Heat Treated ◽  
The Matrix ◽  
Chromium Cast Iron

Abstract High-chromium cast irons are used as abrasion resistant materials. Their wear resistance depends on quantity of carbides and the matrix supporting these carbides. The paper presents the results of cast irons of chemical composition (in wt. %) 19–22 Cr and 2–4.5 C alloyed by 1.7 Mo + 5 Ni + 2 Mn to improve their toughness, which were tested in working conditions of ferroalloys crushing. Tests showed that these as-cast chromium cast irons with mostly austenitic matrix achieved the hardness of 38-45 HRC, but their relative abrasion resistance Ψ ranged from 1.3 to 4.6, was higher comparing to the tool made from the X210Cr12 steel heat treated on hardness 61 HRC. The transformation of austenite into martensite occurs not only at the worn strained areas (on a surface of scratch) but also in their neighbourhood. Due to the work hardening of relatively large volumes of transformed austenite the cast iron possesses high abrasion resistance also on the surfaces where low pressures are acting. The tough abrasion-resistant cast iron well proved for production of dynamic and wear stressed castings e.g., crusher hammers, cutting tools for ceramic etc.

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