表面技术2025，Vol.54Issue(17)：91-103,13.DOI:10.16490/j.cnki.issn.1001-3660.2025.17.008
16MnCr5钢固液冲蚀损伤行为及机理研究
Solid-Liquid Erosion Damage Behavior and Mechanism of 16MnCr5 Steel
摘要
Abstract
Solid-liquid erosion and wear has become one of the mam reasons for the failure of solid-liquid mixing and conveying equipment.An in-depth study of the erosion and wear mechanisms on the high-pressure overflow surfaces of such equipment is crucial for improving the reliability and extending the service life of the equipment.The work aims to propose a finite element mesh model for irregular polyhedral abrasive particles consistent with real service conditions and employ the SPH-FEM coupling algorithm to establish a solid-liquid two-phase erosion wear numerical model.Firstly,by integrating the geometric and material properties of abrasive particles under real service conditions with the actual volume concentration of solid-liquid two-phase flow,the ABAQUS secondary development was performed with the random distribution function theory.This approach generated multiple irregular polyhedral abrasive particle models with varying morphologies and properties in a simplified two-phase flow environment.Secondly,finite element models for the liquid phase(water)with SPH spherical particles and for the solid phase(garnet and 16MnCr5 steel)with SOLID 164 elements were established,respectively.The failure of the 16MnCr5 mesh was simulated by defining an equivalent plastic strain threshold and a bilinear isotropic hardening criterion.Failed elements were automatically removed through the element birth-and-death technique.Solid-liquid erosion experiments were conducted,and the morphological characteristics of erosion damage were quantified with a 3D digital microscope.These experimental results were then compared with numerical simulations to validate the model accuracy.Finally,numerical simulations were performed to investigate the erosion behavior of 16MnCr5(a typical material for solid-liquid equipment)under solid-liquid two-phase flow conditions.With the focus on particle impact angles ranging from 15° to 90° and impact velocities of 450-550 m/s,their effects on material wear were analyzed.Simulation results showed that at a certain erosion angle and velocity,the erosion depth increased with impact time,while the width initially expanded and then stabilized.Once the erosion pit formed,the velocity of abrasive particles in contact with the pit wall surface underwent a sharp decay.Although the erosion angle remained constant,an increase in erosion velocity led to more severe wear.However,the changes in erosion damage morphology were not significant.The mass loss rate peaked at an impact angle of around 30°.As the erosion angle increased,the material damage depth and length exhibited a power-law inverse relationship,while the surface morphology progressively transitioned from elongated shallow scratches to localized deep craters.The effect of large erosion angle erosion velocity on the erosion depth was more significant,and the effect of low erosion angle erosion velocity on the erosion damage length was also significant.In the velocity range of 450 m/s to 550 m/s,the difference of the damage depth of 90° reached 2.65 times that difference of the damage depth of 15°,while the damage length was only 7.2％of 15°.In the solid-liquid erosion and wear process,the change of erosion energy is the primary factor affecting the erosion damage behavior.Erosion velocity primarily affects the damage depth,while the erosion angle mainly affects the damage morphology.This conclusion provides a theoretical foundation for the optimal design of solid-liquid mixing and conveying equipment to resist erosion.关键词
固液混输装备/高压过流表面/多面体磨料颗粒/SPH-FEM耦合/16MnCr5钢/冲蚀磨损Key words
solid-liquid mixing equipment/high-pressure overflow surfaces/polyhedral abrasive particles/SPH-FEM coupling/16MnCr5 steel/erosion wear分类
矿业与冶金引用本文复制引用
刘宗敏,施长成,周宇航,黎杰,龙海洋,张慧君..16MnCr5钢固液冲蚀损伤行为及机理研究[J].表面技术,2025,54(17):91-103,13.基金项目
国家自然科学基金(52305448) （52305448）
中国博士后科学基金面上项目(2022MD713696) （2022MD713696）
重庆工商大学研究生科研创新项目(yjscxx2024-284-197)National Natural Science Foundation of China(52305448) （yjscxx2024-284-197）
China Postdoctoral Science Foundation(2022MD713696) （2022MD713696）
Chongqing Technology and Business University Graduate Research and Innovation Project(yjscxx2024-284-197) （yjscxx2024-284-197）
