Plasma equipment spraying ceramic zirconia powder coating, boat dish workpiece
Plasma equipment spraying ceramic zirconia powder coating, boat dish workpiece
（The substrate of the boat dish is graphite）
Sx-88/80 plasma spraying equipment -- boat dish spraying process
1, base material and use description:
Boat dish is the carrier of alloy profile when sintering in sintering furnace. The base material is graphite, which is sintered together with the alloy profile, and the alloy profile is difficult to remove. A layer of non-stick, fire-resistant material should be coated between the boat and the alloy profile.
2. Equipment Introduction:
Sx-80 plasma spraying equipment can spray a layer of zirconia powder coating on the surface of the boat, which is resistant to sintering and does not bond gold profiles, and can be repeated for many times. The equipment is produced by Guangzhou Sanxin Metal Technology Co., LTD., using the most advanced SG-100 plasma spray gun. Rated power of the equipment is 80KW, argon + hydrogen as the working gas.
3, the boat dish pretreatment process:
The base material of the boat dish is graphite, which is soft. To spray a layer of zirconia powder coating on the top, so that the bonding force of the coating is good, firm and not falling off, need to carry out sandblasting treatment. 60 ~ 70 mesh corundum sand should be selected. Self-priming sand gun is used for sand blasting. Sandblasting pressure 0.5 ~ 0.6mpa. Sandblasting time shall prevail on the surface of the V trough of the boat. The surface of the boat V groove should be rough and uniform, and it is advisable not to damage the boat. Sand for recycling, when the small sand can not meet the surface treatment effect, should be replaced sand.
4, the spraying process of the boat:
Spray the 300X300X48 trough, 300X440X12 trough and 300X440X20 trough boats that have been sandblasted. The spraying parameters are as follows: voltage 35 ~ 40V, current 630 ~ 645A, main gas 25 ~ 33L/min, hydrogen 2 ~ 3L/min, powder gas 5 ~ 8L/min. Powder feeding voltage 6.5 ~ 8.0 The amount of powder on each boat is 20g~25g.
5, boat plating coating process:
The number of repetitions can reach more than 20 times when the boat plate is sintered by spraying. If it cannot be reused for 20 times. The coating material is molybdenum powder before spraying zirconia. The spraying parameters of molybdenum powder are as follows: voltage 33-37V, current 540-620A, main gas 24-29L /min, hydrogen 1-2L /min, powder gas 5-8L /min. Powder feeding voltage 6.3 ~ 7.5V.
Boat dish can be reused more than 20 times, do not need to be sprayed.
Zirconia powder coating
Zirconia powder coating
Zirconia powder coating
Zirconia powder coating
