Luoyang Golden Egret Hard Facing Materials Product--Introduction of Thermal Spray Powder Applied To Ball Valves in Petrochemical Industry.
Thermal spray is a new technology of
surface strengthening and protecting, is a great part of surface modification.
As the development of science and technology, thermal spray technology has
obtained extensive promotion and application all over the country, especially
towards ball valves among petrochemical industry. For the situation where high
temperature, high pressure and medium containing solid particles exist at the
same time, hard sealed ball valve is a kind of commonly approved valve.
Luoyang Golden Egret Hard Facing materials
division has WC-10Co-4Cr.Cr3C2-25(NiCr) .WC-20Cr3C2-9Ni, mainly used for hard seal materials of ball valves. The
powder is even in composition, with concentrated particle size distribution,
stable apparent density, highly spherical shape. Applying with HVOF craft to
form a WC based of Cr3C2 based coating structure on the surface of ball valves.
The sealed face formed after process has a great abrasion and corrosion
resistance, high temperature resistance and sealability, so as to extend the
service life of ball valves. Inside water, gas and oil medium, the service life
will be increased to 10-20 times, under the environment of severe wash-out, the
service life could be increased to more than 5 times.
For the three compositions of powder, we
provide different grade, but the process is all the same: agglomerated and
sintered.
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