Multi-Regression Analysis of the Grinding Surface Roughness in Steel

Abstract

Some correlations between microstructual factors and grinding surface roughness have been investigated experimentally on the spheroidized cementite structure of 0.1-1.0 % C steels. The ferrite grain size, diameter of the cementite and cementite quantity were determined by micrographs and multi-regression analysis was conducted on the relation of these factors to the grinding surface roughness. An example of the squared regression obtained is given by R;= 1.815+0.050X -0.965Y + 0.065Z + 0.058XY + 0.057YZ - 0.004ZX - 0.002X² - 0.168Y² - 0.004 Z² where R_max, x, y and z denote the grinding surface roughness (maximum height roughness), the mean free-ferrite-path from grain boundary to grain boundary (μm), the inter-carbide distance (μm) and the amount of cementite(%), respectively.