重回帰モデルによる鋼の研削仕上げ面粗さの統計的解析

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  • Multi-regression analysis of the grinding surface roughness in steel.
  • ジュウカイキ モデル ニ ヨル コウ ノ ケンサク シアゲメン アラサ ノ ト

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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 Rmax, 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.

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