A kind of preparation method of high-speed steel printing needle
A technology of high-speed steel and printing pins, which is applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., and can solve problems such as tungsten carbide segregation in high-speed steel
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Embodiment 1
[0022] Prepare 20kg of high-speed steel powder (C: 1.21%, Si: 0.8%, Mn: 0.6%, P: 0.03%, S: 0.03%, Cr: 3.56%, V: 0.97%, W: 1.19%, Mo: 9.3% , Co: 9.7%, Fe balance). Spherical powder with a particle size of 100 to 200 meshes, made of a jacket with a diameter of Ф120mm*220mm, put it in a hot isostatic pressing furnace, and sintered at 1100°C and 120MPa under high temperature and high pressure for 3 hours to make a powder high-speed steel ingot with uniform composition and structure; the obtained The powdered high-speed steel ingot is forged and rolled into a disc with a diameter of about 8mm (the initial hot rolling temperature is 1100°C, and the final rolling temperature is 900°C); the high-speed steel disc round material is processed into 0.2mm by annealing and cold drawing process high-speed steel wire rod (cold drawing adopts 10-15% pass deformation, and the drawing speed is 15m / s); the high-speed steel wire rod is quenched at 1200°C, tempered three times at 530°C*1.5hr, and t...
Embodiment 2
[0024] Prepare 10kg of high-speed steel powder (C: 1.23, Si: 0.8, Mn: 0.6, P: 0.03, S 0.03, Cr: 3.56, V: 0.99, W: 1.3, Mo: 9.5, Co: 9.9, Fe balance). Spherical powder with a particle size of 100 to 200 meshes, made of a jacket with a diameter of Ф100mm*120mm, put it in a hot isostatic pressing furnace, and sintered at 1150°C and 100MPa under high temperature and high pressure for 2.5 hours to make a powder high-speed steel ingot with uniform composition and structure; The powdered high-speed steel ingot is forged and rolled into a disk with a diameter of about 9mm (the initial hot rolling temperature is 1150°C, and the final rolling temperature is 850°C); the high-speed steel plate is processed into a 0.3mm round material by annealing and cold drawing processes The high-speed steel wire rod (cold drawing adopts 25% pass deformation, and the drawing speed is 25m / s); the high-speed steel wire rod is quenched at 1250°C, tempered three times at 530°C*1.5hr, and the hardness of the ...
Embodiment 3
[0026] Prepare 10kg high-speed steel powder (C: 1.27%, Si: 0.7%, Mn: 0.5%, P: 0.03%, S 0.03%, Cr: 3.56%, V: 0.93%, W: 1.34%, Mo: 9.6%, Co: 9.6%, the balance of Fe). Spherical powder with a particle size of 100-150 mesh, made of a jacket with a diameter of Ф100mm*120mm, put it in a hot isostatic pressing furnace, and sintered at 1130°C and 100MPa under high temperature and pressure for 2.5 hours to make a powder high-speed steel ingot with uniform composition and structure; the obtained The powdered high-speed steel ingot is forged and rolled into a disk with a diameter of about 8.5mm (the initial hot rolling temperature is 1130°C, and the final rolling temperature is 870°C); the high-speed steel plate is processed into a 0.25 mm high-speed steel wire (cold drawing adopts 25% pass deformation, drawing speed 25m / s); the high-speed steel wire is quenched at 1230°C, tempered three times at 530°C*1.5hr, and the hardness of the obtained high-speed steel wire is 70HRC , the straight...
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