Preparation method for an AlSiY coating of directional solidification alloy high-pressure turbine blade
A directional solidification, vortex blade technology, applied in metal material coating process, coating, ion implantation plating and other directions, can solve the problems of short service life of the coating, not full-life coating, and high production cost of the coating. High bonding strength, avoiding recrystallization, reliable and stable quality
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Embodiment 1
[0031] (1) Pre-treatment process: firstly, the blades of the directionally solidified alloy DZ22 gas turbine engine are subjected to wet sand blowing treatment, using white corundum sand, the particle size is 140 mesh, the wind pressure is 0.2MPa, and the water pressure is 2.1kg / cm 2 , the sand blowing distance is 120mm, and then the blades after the wet sand blasting treatment are ultrasonically cleaned and soaked in acetone, then dried and inspected for appearance, and weighed;
[0032] (2) Use cathodic arc plating equipment to apply AlSiY coating to the pretreated blades: first, ion cleaning is performed on the blades, and the specific process parameters are as follows: the pressure is 5.31×10 -2 Pa, arc current 450A, voltage 250V, arc plating time 2min; then carry out AlSiY coating plating, the specific process parameters are, the pressure is 5.31×10 -2 Pa, arc current 450A, voltage 30V, arc plating time 35min;
[0033] (3) Weigh the coated blades and conduct visual inspe...
Embodiment 2
[0050] (1) Pre-treatment process: firstly, wet blowing sand treatment is carried out on the directional solidification alloy DZ22 gas turbine engine blade, using white corundum sand, the particle size is 325 mesh, the wind pressure is 0.4MPa, and the water pressure is 2.2kg / cm 2, the sand blowing distance is 380mm, and then the blades after the wet sand blowing treatment are ultrasonically cleaned and soaked in acetone, then dried and inspected for appearance, and weighed;
[0051] (2) Use cathodic arc plating equipment to apply AlSiY coating to the pretreated blades: first, ion cleaning is performed on the blades, and the specific process parameters are as follows: the pressure is 5.30×10 -2 Pa, arc current 650A, voltage 250V, arc plating time 6min; then carry out AlSiY coating plating, the specific process parameters are, the pressure is 5.30×10 -2 Pa, arc current 600A, voltage 50V, arc plating time 45min;
[0052] (3) Weigh the coated blades and conduct visual inspection; ...
Embodiment 3
[0056] (1) Pre-treatment process: firstly, the blades of directional solidification alloy DZ22 gas turbine engine are subjected to wet blowing sand treatment, using white corundum sand, the particle size is 200 mesh, the wind pressure is 0.3MPa, and the water pressure is 2.1kg / cm 2 , the blasting distance is 200mm, and then ultrasonic cleaning and acetone dipping are performed on the blades after wet sand blasting treatment, and then drying and appearance inspection are carried out, and weighing;
[0057] (2) Use cathodic arc plating equipment to apply AlSiY coating to the pretreated blades: first, ion cleaning is performed on the blades, and the specific process parameters are as follows: the pressure is 5.31×10 -2 Pa, arc current 500A, voltage 250V, arc plating time 3min; then carry out AlSiY coating plating, the specific process parameters are, the pressure is 5.31×10 -2 Pa, arc current 500A, voltage 40V, arc plating time 40min;
[0058] (3) Weigh the coated blades and con...
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