Abstract
The 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.
Highlights
IntroductionAs wear-resistant materials, chromium white cast iron (WCI), boron WCI, and particle reinforced metal matrix composite consist of a tough metalbased phase (e.g., austenite, martensite, ferrite, and pearlite) and a hard wear-resistant phase (e.g., carbide, ceramic hard-phase)
As wear-resistant materials, chromium white cast iron (WCI), boron WCI, and particle reinforced metal matrix composite consist of a tough metalbased phase and a hard wear-resistant phase
The wear resistance of WCIs depends on the hard carbides and metal matrix composite structure, both of which play an important role in the resistance to abrasive wear
Summary
As wear-resistant materials, chromium white cast iron (WCI), boron WCI, and particle reinforced metal matrix composite consist of a tough metalbased phase (e.g., austenite, martensite, ferrite, and pearlite) and a hard wear-resistant phase (e.g., carbide, ceramic hard-phase). These materials are extensively used in various industrial fields, such as mining grinding, mineral handling, and oil sand slurry pumping [1,2,3,4]. Umemoto et al [8,9,10] successfully produced singlephase bulk carbide using mechanical alloying (MA) and spark plasma sintering (SPS) This combination of techniques is a suitable for investigating phase interactions. The interaction between cementite and pearlite in the material was determined, and the contribution of each phase to abrasive wear was assessed
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
