| 摘要 |
PURPOSE: Provided is a method capable of producing a lot of magnetic abrasive of iron-niobium carbide in a short time, which can further increase life and the abrasion of the magnetic abrasive. CONSTITUTION: The method comprises the steps of: (i) mixing iron-based powder and abrasive of NbC; (ii) shaping the mixed powder using press; (iii) dissolving the shaped powder using dissolution process; (iv) cooling the powder under argon atmosphere in chamber; (v) crushing and grinding the cooled powder using simple crusher; (vi) classifying the powder obtained in the step(v) with sieve. In the step(iii), plasma or electric arc is used as heat source. The Fe-NbC mixed powder consists of 30-50 vol% of iron powder and 50-70 vol% of NbC.
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