Surface Integrities of Different Trajectories in Belt Grinding for Pure Iron Functional Performance Test Pieces

Ying Liu,Yun Huang,Wentao Dai,Guijian Xiao

doi:10.3390/cryst9030123

Abstract

In order to reduce the influence of surface burns and other defects in the processing of pure iron parts for a functional properties test, and to improve the accuracy and usability of the test results, abrasive belt grinding is used for surface grinding. Because of the long circumference of the belt, and the long cooling time of the abrasive particles, cold grinding can be achieved, so that the incidence of surface burns, machining hardening, and other defects can be reduced. An experimental platform for belt grinding of pure iron parts for a functional properties test was built, and corresponding belt grinding experiments were carried out. The influences of grinding parameters, such as belt velocity, feed velocity, the grinding track on the microcosmic morphology, surface roughness, surface residual stress, and micro-hardness were studied. The results showed that belt grinding improved the surface integrity, the surface roughness was less than Ra 0.4 μm, the surface residual stress ranged from −253.84 MPa to −164.14 MPa, and the micro-hardness ranged from 118 HV to 170 HV. Furthermore, to get the workpiece surface to mostly suit the functional performance test, a high abrasive belt linear speed, a low grinding depth, and a feed speed should be selected, and the processing should be conducted with a circular trajectory.

Highlights

Industrial pure iron is a kind of steel with a carbon content of 0.02~0.04%, where the content of the other elements is best when the carbon content is less
In the orthogonal experiment of abrasive belt grinding on this functional performance test piece, SEM was used to take surface electron microscope images of several typical samples, and for the EDS
Morphology circular trajectory, due to the motion direction and the abrasive belt grinding head in the direction of the feed, there was a change of direction angle, the dulling could be replaced intest a timely

Summary

Introduction

Industrial pure iron is a kind of steel with a carbon content of 0.02~0.04%, where the content of the other elements is best when the carbon content is less. Industrial pure iron is soft, ductile, and it has good electromagnetic properties. For one thing, it can be used as a deep-drawing material. In industrial applications, because of the soft texture of pure iron material, it can be seriously deformed during processing, and a large amount of heat accumulation leads to oxidative burns, which seriously affects the surface quality, and at the same time intensifies the adhesion between the tool and the workpiece, shortening the life of the tool [1]

Methods

Results

Conclusion