Chromium-molybdenum steel lining plate lifting strip embedded hard alloy for semi-autogenous mill with diameter of 12.2 m and casting method of chromium-molybdenum steel lining plate lifting strip embedded hard alloy
A cemented carbide and semi-autogenous grinding machine technology, which is applied in the field of metal casting manufacturing, can solve the problems of low yield strength, difficult maintenance and disassembly, and easy plastic deformation of high manganese steel, so as to achieve excellent wear resistance and inhibit coarsening of carbides , Good toughness effect
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Embodiment 1
[0034] A chrome-molybdenum steel liner lifting strip inlaid with cemented carbide for a semi-autogenous mill with a diameter of 12.2m, consisting of a liner base and cemented carbide;
[0035] The weight percentage of each component of the liner matrix is: C is 0.60-0.80%, Cr is 1.80-2.20%, Mo is 0.30-0.60%, Si is 0.30-0.80%, Mn is 0.60-0.80%, Ni is 0.50-1.00% %, V is 0.10-0.20%, Nb is 0.01-0.0.03%, Re is 0.005-0.015%, S≤0.025%, P≤0.025%, and the balance is Fe and unavoidable impurities;
[0036] Cemented carbide is WC particles with a particle size of 0-10 μm;
[0037] Its preparation method is:
[0038] Prepare raw materials according to mass percentage;
[0039] (1) Smelting: Proportionate ferrochromium, ferromolybdenum, ferromanganese, and ferronickel to make the element content meet the expected requirements, add them to the intermediate frequency furnace in turn, feed aluminum wires for pre-deoxidation and final deoxidation, and leave the furnace at 1600 °C , add Wc=0...
Embodiment 2
[0044] With embodiment 1, the difference is that step (2),
[0045] The normalizing treatment is specifically: put the combination prepared in step (1) into a heating furnace preheated to 250-300°C in advance, and heat the combination to 590-610°C at a heating rate of 60-80°C / h , keep warm for 3h, then raise the temperature to 900-960°C at a heating rate of 30-50°C / h, keep warm for 8h, then take the liner casting out of the heating furnace, air cool to 200-250°C, and then perform tempering treatment.
[0046] The tempering treatment is as follows: put the normalized combination into the heating furnace, heat the lining plate casting to 340-360°C at a heating rate of 30-50°C / h, keep it warm for 3 hours, and then heat it at 30-50°C Raise the temperature to 600-660°C at a heating rate of / h, keep it warm for 12 hours, and after air cooling, get the chrome-molybdenum steel lining lifting strip inlaid carbide.
Embodiment 3
[0048] With embodiment 1, the difference is that step (2),
[0049] The normalizing treatment is specifically: put the combination prepared in step (1) into a heating furnace preheated to 250-300°C in advance, and heat the combination to 590-610°C at a heating rate of 60-80°C / h , keep warm for 3h, then raise the temperature to 900-960°C at a heating rate of 30-50°C / h, keep warm for 8h, then take the liner casting out of the heating furnace, air cool to 200-250°C, and then perform tempering treatment.
[0050] The tempering treatment is as follows: put the normalized combination into the heating furnace, heat the lining plate casting to 340-360°C at a heating rate of 30-50°C / h, keep it warm for 3 hours, and then heat it at 30-50°C Raise the temperature to 600-660°C at a heating rate of / h, keep it warm for 12 hours, and after air cooling, get the chrome-molybdenum steel lining lifting strip inlaid carbide.
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