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Juan H.,Central Iron and Steel Intstitute | Jiongbin Y.,Central Iron and Steel Intstitute | Yibo L.,Central Iron and Steel Intstitute | Qilu G.,Central Iron and Steel Intstitute
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2010

High iron-based diamond tool were made by power metallurgy process. The effect of the addition of ferrophosphourus on perfirmances of high iron-based matrix was studied by inspecting the hardness, density and impact toughness of the matrix The change of matrix microstucture at diffrent ferrophosphour additive content was observed by x ray diffraction and metllographic chart. The results demonstrated that, with the incease of P-Fe additive content the matrix relative density increased the matrix hardness went up almost staightly. The hardness of matrix containing 3%P-Fe got HRB97, while that of matrix containing 15% P-Feattained HRBI13 .The bending strength and impact toughness decreased along with P-Feadditive content increasing, while the brittleness of the matrix increased which is favourable to the free cutting performance of the matrix. SEM observation result that, the fracture of the matrix is brittle farcture in a transition from ductile to brittle fracture.

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