Method for regenerating high-speed wire cemented carbide roll collar
A technology of hard alloy and roll rings, which is applied in the field of regeneration of high-wire hard alloy roll rings, can solve the problems affecting the quality of hard alloy roll rings, the inability to make hard alloy roll rings, and the impact on the quality of hard alloys. Achieve remarkable energy-saving effects, save electricity consumption, and shorten the heat preservation time
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Embodiment 1
[0025] Embodiment 1, a method for regenerating a high-wire cemented carbide roll ring, is to use the roll ring with the minimum size as a substrate, and sinter the outer circle, end face, and inner hole surface of the scrapped roll ring through a vacuum pressure sintering furnace, press A regenerated working layer of the same material as that of the scrapped roller ring that is fused into one, the material hardness, bending strength, density, thermal conductivity, and expansion coefficient of the regenerated working layer are all the same, and the ring body size of the regenerated roller ring is the same as that of the original roller ring are the same size.
Embodiment 2
[0026] Embodiment 2, a kind of high-wire hard alloy roller ring regeneration method is that the method is: a, the regenerated roller ring base and the same material cemented carbide powder are packed into a high-purity graphite mold, and the full-automatic dry powder press In the machine, the powder is filled by centrifugal rotation while stirring, scraping, and compacting; b. Put the graphite mold filled with powder into the induction coil of the intermediate frequency furnace to heat, pressurize, heat up, and pre-sinter, and the pressure is sintered The temperature is 1200°C, the pressure is 6MPa, and the power is cut off after 30 minutes of heat preservation; c. After the sintering is completed, wait for the workpiece to cool below 100°C, take out the workpiece, check the sintered blank roll ring, and then put it into the vacuum pressure sintering furnace after passing the test. Sintering, heat up to 1370°C-1490°C, then fill with argon to pressurize to 3 MPa-6 MPa, keep warm...
Embodiment 3
[0027] Embodiment 3, a high-wire cemented carbide roll ring regeneration method, is based on Example 1, and the sintering in the vacuum pressurized sintering furnace is based on the size and material of the roll ring to formulate a corresponding heating curve, as follows:
[0028] The diameter of the roll is Ф158mm: room temperature rises to 900°C in 4 hours, heat preservation for 1 hour, temperature rises to 1250°C in 4 hours, heat preservation for 1 hour; temperature rises to 1490°C in 5 hours, heat preservation for 1 hour, pressurized gas 6 MPa, heat preservation for 40 minutes , cooling with the furnace;
[0029] The diameter of the roll is Ф170mm: room temperature rises to 900°C in 3 hours, heat preservation for 1 hour, temperature rises to 1250°C in 4 hours, heat preservation for 60-70 minutes; temperature rises to 1450°C in 4 hours, heat preservation for 1 hour, pressurized gas 3.5 MPa, heat preservation 40 minutes, cooling with the furnace;
[0030] The diameter of th...
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