Wear resisting parts for process valves
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United States of America Patent
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-
Mar 20, 2001
Grant Date -
N/A
app pub date -
Apr 1, 1999
filing date -
Oct 2, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to wear resistant parts for process valves. The use of said parts can be particularly advantageous in the chemical and petrochemical industry, in the mining industry and in other processing industries. According to the invention, the wear resistant parts for process valves are characterized by a 50 to 500 .mu.m thick coating applied by thermal spraying on the valve surfaces subjected to wear, particularly on the bearing and sealing faces. The coating is characterized by the fact that one or more cubic hard material phases containing Ti and/or Ti and a second metal and a metal binder phase can be demonstrated therein, and by the fact that when the coatings are rubbed against each other within a temperature range of from room temperature to 600.degree. C., the friction coefficient is <0.6.
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