Hardening ceramic processing method for surface of piston rod
A technology of hardening treatment and piston rod, which is applied to parts of pumping devices for elastic fluids, variable displacement pump parts, machines/engines, etc. It can solve the problems of low qualified product rate, long production cycle of piston rods, and high cost. question
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[0023] The specific process of ceramic spraying:
[0024] After the piston rod is tempered and semi-finishing, the piston rod is degreased (that is, the surface of the piston rod to be sprayed is cleaned with alkaline), and then:
[0025] 1. Shot peening of the piston rod: use 22 mesh corundum to blast the piston rod, and the nozzle back pressure should be ≥0.6MPa
[0026] 2. Use a plasma spraying machine for primer spraying:
[0027] GP spraying machine is used, the spraying speed is 600m / S, the working temperature is <800°C, the particle size is 200-320 mesh, and the ratio of Ni and AL powder for spraying material is 95:5.
[0028] 3. Ceramic spraying with plasma spraying machine:
[0029] Adopt GP type spraying machine, spray speed 600m / S, powder particle size 20-40m, powder temperature > 184 ℃, powder ratio (%) AL 2 o 3 : 60, TiO 2 : 40, or TiO 2 : 13, AL 2 o 3 : 87; or TiO 2 : 100; or AL 2 o 3 : 94, TiO 2 : 2.5, SiO 2 : 3.5. The coating is 5m each time.
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