| 摘要 |
PURPOSE:To produce a high vanadium alloy steel powder stable for powder metallurgy, by adding, to metal oxide constituents, C in an amount required to reduce the oxides so as to make them into corresponding metal carbides, pulverizing the mixture, and reducing the mixture. CONSTITUTION:In the manufacture of a high vanadium alloy steel fine powder that contains iron as the base, one or more of Cr, Mo, W, Co and Mn, at least 5.5wt% V and 1.5-12wt% C, oxide powders corresponding to these constituent elements are used as raw materials, the V2O5 is previously pulverized to a size of up to 10mum, to these raw powders is added C powder in such a proportion that the quantitative ratio of O to C in the raw powders is O/C=1.4-10, and the mixture is pulverized to a size of up to 10mum, and is reduced at a temperature not greater than that of the solidus of the intended alloy in an H2 stream thereby co-reducing the oxide powders with the H2 and C and at the same time carrying out the alloying reaction by solid phase diffusion. |
