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

作　　者：Baochao ZHENG Wei LI Xiaohui TU Jiandong XING Suocheng SONG 

机构地区：[1]Institute of Advanced Wear&Corrosion Resistant and Functional Materials,Jinan University,Guangzhou 510632,China [2]State Key Laboratory for Mechanical Behavior of Materials,School of Materials Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China

出　　处：《Friction》2021年第6期1378-1389,共12页摩擦（英文版）

基　　金：The authors would like to appreciate the financial support for this work from the National Natural Science Foundation of China(No.51701084);Research and Innovation Foundation for Young Scientists Project of Jinan University(No.21617338);China Postdoctoral Science Foundation(No.2019M663700).

摘　　要：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.

关 键 词：two-body abrasive wear white cast iron(WCI) wear resistance INTERACTION 

分 类 号：TH117.1[机械工程—机械设计及理论] TG143.1[一般工业技术—材料科学与工程]