Metso Paper Inc.

Neles Controls Oy

Tapio M&auml;ntyl&auml;

Pentti S Lehtonen

Lutz-Michael Berger

Petri Sorsa

Petri Vuoristo

Kai Laitinen

The invention concerns a process for treatment of faces that contain chromium or aluminum in a paper/board machine or in a finishing machine. A fluorine compound of low surface energy is applied onto the face, which compound is made to adhere to the chromium or aluminum atoms in the face.

Process of surface treatment for faces that become contaminated in a paper or board machine

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 &mgr;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&deg; C., the friction coefficient is <0.6.

Wear resisting parts for process valves

Growing community of inventors

Tampere, Finland

Tapio Mäntylä

Growing community of inventors

Tampere, Finland

Tapio M&auml;ntyl&auml;

Tapio Mäntylä