Wearable papermaking coating scraper
A scraper and coating technology, applied in scraper, papermaking, paper machine, etc., can solve the problems of mismatching mechanical properties between ceramic coating and scraper substrate, difficulty in spraying and grinding, reducing scraper service life, etc., to achieve manufacturability Effects of improving, improving coating performance, and increasing bonding strength
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[0011] The following is to obtain NiCr alloy-NiAl intermetallic compound / Al on the steel scraper 2 O 3 The ceramic composite coating is taken as an example to describe the implementation process of this application.
[0012] 1. The surface of the steel scraper substrate 3 is cleaned and sandblasted to form an active metal surface. The blasting sand particle size is 25~35 mesh, the blasting air pressure is 0.5~0.6MPa, the blasting distance is 10~15mm, the surface after blasting Dust removal.
[0013] 2. Plasma spraying NiCr alloy coating on the surface of active metal as a transition layer 2; spraying distance 150-200mm, current 450A, argon flow rate is 1200L / h, nitrogen flow rate is 1000L / h, coating thickness is 0.05mm.
[0014] 3. Plasma spraying NiAl / Al on the surface of NiCr alloy coating 2 O 3 The composite material powder is used as the working layer 1. The spraying distance is 150-200mm, the current is 500A, the argon flow is 1500L / h, the nitrogen flow is 1000L / h, and the sp...
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