Numerical Simulation of Derusting Treatment of Steel Parts By Shot Blast

Abstract

In this paper, we investigated the shot blast treatment for derusting application through finite element (FE) simulations with a large number of random shots. The element deletion technique based on dynamic failure criteria was used to model the removal of rust. The cohesive surface model with damage evolution was used to characterize the decohesion of the rust/substrate interface. The effects of various processing and material parameters on the derusting effectiveness were examined. The results show that the rate of derusting mainly depends on the shot size, velocity and impinging angle, with little relevance to the rust thickness. The spalling of the rust fragments resulted from the decohesion of the rust/substrate interface were observed, especially during the later stage of the treatment. Furthermore, the residual stress and the surface roughness was also investigated and the beneficial effects of shot blast treatment in terms of these aspects were highlighted.

Методика Проведення Експериментальних Досліджень Впливу Ударної Дії Дробинок На Стан Металевих Поверхонь

“…Аналітичному опису процесу абразивного очищення, який характеризується масовою імпульсивною атакою оброблюваної поверхні потоком частинок (дробинок), які розганяються до певної швидкості стиснутим повітрям через спеціальні сопла, присвячено багато наукових праць. Більшість із них присвячено дослідженню зношуванню поверхонь при терті, наприклад [1,[4][5][6], а також обробці при ударі [7][8][9][10][11] для досягнення регулярних поверхневих мікроструктур [12]. На жаль, результати дослідження, отримані на використанні аналітичної моделі взаємодії окремої дробинки з пружно-пластичним півпростором [13][14][15][16][17][18][19][20][21], зокрема й чисельним моделюванням [22][23][24][25] проведені без глибокого узагальнення на технологічні параметри дії дробоструминного факела.…”

Study of Performance of a Vibrating Machine for Cleaning Contamination of Machine Parts with a Submersed Pulsating Jeam with Solid Particles

“…Leading scientists were engaged in the development of theoretical foundations and modeling of the processes of interaction of solid particles with the surface [8,[23][24][25]. The behavior of particles in flows after collision with a flat surface has been studied [26][27], numerical modeling of the cleaning of steel parts from rust using blast-jet processing [28] has been carried out, models of surface evolution during abrasive-jet processing [28] have been created using the method of discrete elements, particle impact velocities in fluidized granular flows were determined [18,23], characteristics of abrasive slurry jet processing in comparison with abrasive air-jet processing were determined [25].…”

“…The authors [28][29][30] investigated and carried out numerical modulation of the processes of cleaning the surfaces of parts using shot-jet and determined the influence of the main factors on the process of cleaning surfaces from contamination.…”

Viscoelastic Resistance of the Surface Layer of Steel Products to Shock Attack of a Spherical Pellet

“…Many scientific works have been devoted to the solution of such problems, which are aimed both at the description of impact contact with an obstacle of an individual particle [1][2][3][4][5][6][7][8][9], and the mass jet stream of particles with access to hardening of the surface layer [10,11], cleaning surfaces [12][13][14] destruction of the surface layer [15,16] and optimization of various technological processes [17,18].…”