Effect of casting pressure on microstructural evolution and wear behavior of Fe–Cr–C white cast iron

2019 ◽  
Vol 6 (6) ◽  
pp. 066538 ◽  
Author(s):  
Dong Qi ◽  
Xing Shuming ◽  
Qiu Bo
Keyword(s):  
Cast Iron ◽  
Microstructural Evolution ◽  
White Cast Iron ◽  
Wear Behavior ◽  
Casting Pressure

Effect of the Morphology, Size, Distribution and Homogeneity of Carbides and Matrix on Wear Resistance in High Cr-Alloys White Cast Iron

2021 ◽  
Vol 1016 ◽  
pp. 56-62
Author(s):  
Carlos Camurri ◽  
Jasmín Maril ◽  
Eric Romero
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
White Cast Iron ◽  
Wear Behavior ◽  
Hardness Test ◽  
Mining Equipment ◽  
Cast Irons ◽  
Loss Of Mass ◽  
Ultimate Purpose ◽  
Wear Tests

The aim of this work was to study the wear behavior of high-chromium white cast iron of families ASTM A-532 II (B, D) and III A, used in mining equipment, in order to establish relationships between the wear resistance, hardness and microstructure of the alloys, with the ultimate purpose of predicting their resistance to abrasion. Samples from these cast irons were subjected to mechanical wear tests by rotating drum, then their micro/macro hardness was measured and microstructure analyzed by optical and scanning electron microscopy .It was found that when the macroscopic hardness differences were significant there was a strong correlation between the hardness and the loss of mass due to abrasion-impact wear. By contrast, when the alloys had similar hardness, the wear resistance was determined by morphology, size, and the distribution and connectivity of carbides and matrix and therefore was not predictable by an only simple hardness test.

scholarly journals Effect of interaction between cementite and pearlite on two-body abrasive wear behaviors in white cast iron

Friction ◽  
2020 ◽  
Author(s):  
Baochao Zheng ◽  
Wei Li ◽  
Xiaohui Tu ◽  
Jiandong Xing ◽  
Suocheng Song
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Abrasive Wear ◽  
White Cast Iron ◽  
Wear Behavior ◽  
Interaction Mechanism ◽  
Wear Test ◽  
Wear Process ◽  
Cr Content ◽  
Contact Loads

AbstractThe wear interaction of cementite and pearlite in the white cast iron (WCI) was investigated using the two-body abrasive wear test under contact loads of 20, 35, and 50 N. The wear behavior, wear surface morphology, sub-surface structure, and wear resistance were evaluated using X-ray diffraction, microhardness testing, and nano-indentation. The results indicated that when the Cr content was increased from 0 to 4 wt%, there was a significant increase in the microhardness (H) and elasticity modulus (E) of the cementite. This yielded a 15.91%- and 23.6%-reduction in the degree of wear resistance and surface roughness, respectively. Moreover, no spalling and breaking of cementite was observed with increasing Cr content during the wear process, indicating improved wear resistance of the bulk cementite. In addition, the hard phase (cementite) and tough matrix (pearlite) composite structure exhibited a good protective and supporting effect. Thus, it was concluded that the interaction mechanism of the wear phase contributed to the reduction of the wear weight loss of the composite during the wear process. The contribution of the interaction between the hard wear-resistant phase and the tough phase in WCI to the wear resistance decreased with increasing hardness of the pearlite matrix.

scholarly journals Three-body-type Abrasive Wear Behavior of Multi-alloyed White Cast Iron with Different Carbon Contents Used for Hot Work Rolls

2021 ◽  
Vol 61 (11) ◽  
pp. 2832-2843
Author(s):  
Sudsakorn Inthidech ◽  
Jatupon Opapaiboon ◽  
Kaoru Yamamoto ◽  
Yasuhiro Matsubara
Keyword(s):  
Cast Iron ◽  
Abrasive Wear ◽  
White Cast Iron ◽  
Wear Behavior ◽  
Body Type ◽  
Abrasive Wear Behavior ◽  
Three Body ◽  
Work Rolls

Dry Sliding Wear of As-Cast and Thermomechanically Processed Low Chromium White Cast Iron

2013 ◽  
Vol 797 ◽  
pp. 725-730
Author(s):  
Xing Jian Gao ◽  
Qi Zhang ◽  
Dong Bin Wei ◽  
Si Hai Jiao ◽  
Zheng Yi Jiang
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Thermomechanical Treatment ◽  
Sliding Wear ◽  
White Cast Iron ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Low Carbon ◽  
Wear Process

This investigation attempts to improve the wear resistance of low chromium white cast iron (LCCI) by thermomechanical treatment. The thermomechanical treatment of the brittle LCCI with crack-free was successfully carried out by bonding it with a ductile low carbon steel firstly. Afterwards the dry sliding wear behavior of as-cast (LCCI-A) and thermomechanically processed (LCCI-B) samples was studied using a pin-on-disc apparatus under different test conditions. The microstructural examination shows that the refined supercooled austenite and plenty of secondary carbides in LCCI-B replaced the original microstructure of martensite and retained austenite with network carbide in LCCI-A. This significant evolution is beneficial to form and stabilise the oxide layer on the substrate, which makes the oxidational wear rather than abrasive wear or delamination dominating the wear process so that the improvement of the wear resistance of LCCI was achieved by hot working.

Effect of chromium content on cementite – pearlite interaction of white cast iron during three-body abrasive wear

2017 ◽  
Vol 69 (6) ◽  
pp. 863-871 ◽  
Author(s):  
Baochao Zheng ◽  
Zhifu Huang ◽  
Jiandong Xing ◽  
Yiyang Xiao ◽  
Fan Xiao
Keyword(s):  
Cast Iron ◽  
Abrasive Wear ◽  
White Cast Iron ◽  
Chromium Content ◽  
Wear Behavior ◽  
High Load ◽  
Contribution Rate ◽  
Content Type ◽  
Chromium Addition ◽  
Three Body

Purpose This paper aims to demonstrate the effect of varying chromium content on the wear behavior of white cast iron, to study the interaction relationship between cementite and pearlite in white cast iron, while estimating their contribution rate in abrasive wear. Design/methodology/approach To study interaction of cementite-pearlite of white cast irons with different chromium content in three-body abrasive wear, three kinds of chromium white cast iron, bulk single-phase cementite, pure pearlite samples and the white cast iron (WCI), were prepared using the melting and casting technique. The so-called pure pearlite samples have the same chemical composition, microstructure and properties as the pearlite matrix in white cast iron. Findings Results indicated that the interaction has a negative value. Its absolute value decreased with increasing chromium addition. Meanwhile, a high load resulted in an increased interaction value. The contribution rate of cementite to interaction, which was higher than that of pearlite, increased with increasing chromium addition. This indicated cementite was a main phase. Besides, the reductive size of abrasive has a significant effect on the contribution rate at the high load. These prominent cementite occurred fracture, when small size abrasive indented the matrix. These result in the absence of a protective effect of cementite during wear process. Eventually, the contribution rate of cementite decreased significantly. Originality/value This paper demonstrates the effect of varying chromium content on wear behavior of white cast iron, to study the interaction relationship between cementite and pearlite in white cast iron while estimating their contribution rate in abrasive wear.

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