Reciprocating piston pump surface treatment process
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United States of America Patent
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N/A
Issued Date -
Jun 27, 2002
app pub date -
Dec 20, 2001
filing date -
Dec 22, 2000
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A process for treating rods and cylinders for use in reciprocating piston pumps is provided which yields a substantial increase in wear over the chrome coatings of the prior art. A base material of stainless steel 17-4ph is heat treated in the range generally from H-900 to H-1150. Once the material is pretempered, an ion nitriding process is applied. With this process, the hardness can be increased from the standard 17-4 hardness of RC-44 max to a desired hardness of RC-65 to 75.
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