Prepn process of sand blasting ceramic nozzle
A preparation process and a technology for sandblasting nozzles, applied in the field of ceramic sandblasting nozzle preparation technology, can solve the problems of easy occurrence of brittle fracture, long sintering time and high price of ceramic nozzles
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Embodiment 1
[0013] Example 1: Press B 4 C40%, (W, Ti) C57%, Si3% by mass percent Weigh raw materials. Mix the weighed raw materials, and then carry out intensive ball milling, using ethanol as the medium, and the ball milling time is 120 hours. The ball-milled material is placed in a vacuum drying oven to dry, and the dried material is screened in a cabinet with a nitrogen-protected atmosphere. The ceramic sandblasting nozzle was prepared by hot pressing sintering method, the sintering temperature was 1820°C, the pressure was 36MPa, the holding time was 25min, and the nitrogen sintering atmosphere was used. B prepared by the above process 4 The C-based ceramic sandblasting nozzle has a high degree of densification, and its strength and toughness are higher than those of pure B 4 C ceramics are greatly improved, and the sintering temperature is changed from pure B 4 The 2200°C of C ceramics is reduced to 1820°C, and the sintering time is shortened, and the corrosion and wear resistance...
Embodiment 2
[0014] Example 2: press B 4 C58%, (W, Ti) C40%, Si2% by mass percent Weigh raw materials. Mix the weighed raw materials, and then carry out intensive ball milling, using ethanol as the medium, and the ball milling time is 150 hours. The ball-milled material is placed in a vacuum drying oven to dry, and the dried material is screened in a cabinet with a nitrogen-protected atmosphere. The ceramic sandblasting nozzle was prepared by hot pressing sintering method, the sintering temperature was 1850°C, the pressure was 36MPa, the holding time was 30min, and the sintering atmosphere was nitrogen. B prepared by the above process 4 The C-based ceramic sandblasting nozzle has a high degree of densification, and its strength and toughness are higher than those of pure B 4 C ceramics are greatly improved, and the sintering temperature is changed from pure B 4 The 2200°C of C ceramics is reduced to 1850°C, and the sintering time is shortened, and the corrosion and wear resistance of t...
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