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1. Preparation |
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The bonding surface of both cladding
metal and backing steel are ground and thoroughly
cleaned. The bonding surface of the cladding metal
is nickel-plated to ensure metallurgical bond. The
reverse side of the cladding metal is coated with
an infusible parting compound. |
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2. Assembly |
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Two pairs of plates, each with
the backing steel outside and cladding metal inside
are matched together to form a composite assembly
and then sealed along the edges by welding. The welding
is performed to protect the corrosion resistant alloy
from possible contamination by exposure to atmosphere
during heating before rolling. |
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3. Rolling, Heat-Treating
and Cutting |
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The composite assembly is heated
to the proper temperature in a heating furnace and
rolled to the given sizes in order to bond the cladding
and backing materials metallurgically. After rolling,
the assembly is heat-treated as required considering
the mechanical properties of the backing steel and
corrosion resistance of the cladding metal. The assembly
is then separated into two clad plates to be cut into
given dimensions. |
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4. Surface Finishing and
Packaging |
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Both cladding and backing plates
are surface-finished to eliminate injurious defects.
In particular, the corrosion- resistant surface of
the cladding metal is ground by abrasive belt and
pickled. The finished clad plates are shipped with
the surfaces properly protected against damage during
transportation. |
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5. Testing and Inspections |
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In order to assure and guarantee
the quality of the clad plates, ultrasonic examination
and mechanical testing are conducted with aid of a
computer system. |
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See
process by illustration flow chart |
