Manufacturing method for high-vanadium high-speed steel composite roll
A technology of composite roll and manufacturing method, which is applied in the field of roll manufacturing, can solve problems such as difficulty in guaranteeing bonding quality, high melting point of vanadium oxide, and low strength of roll journal, so as to improve bonding rate, increase vanadium absorption rate, and reduce vanadium The effect of oxide
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[0055] Example 1
[0056] A method for manufacturing a high-vanadium high-speed steel composite roll includes the following process steps:
[0057] A. Modeling, the roll body model adopts a metal model sprayed with paint inside, the roll neck model adopts quartz sand clay modelling, and the bottom box is connected to an overflow pipe;
[0058] B. Smelting raw materials: the outer layer of high-vanadium high-speed steel raw materials, transition layer ductile iron raw materials, core ductile iron molten iron raw materials are respectively smelted in an intermediate frequency furnace;
[0059] (1) The chemical composition and weight percentage of the outer high-vanadium high-speed steel are C2.0%, Cr4.0%, Ni0.7%, Mo4.3%, V8.0%, W2.0%, Nb2. 5%, Re0.08%, P≤0.04%, S≤0.04%, Mn≤0.5%, Si1.5%, the rest is Fe; the melting temperature of the outer layer of high-vanadium high-speed molten steel is 1600-1650°C.
[0060] After smelting, the outer layer of high-vanadium high-speed molten steel is mod...
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[0073] Example 2
[0074] The preparation process is basically the same as that of Example 1, with the difference that: in step C, the pouring temperature of the outer layer of high-vanadium high-speed steel is 1420-1450°C.
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[0075] Example 3
[0076] The preparation process is basically the same as in Example 1, with the difference that: in step C, the pouring temperature of the transition layer molten iron is 1500-1550°C.
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