process for the production of zylinderteil and nickelbasisauftragslegierungen

摘要

A cylinder member for an internal combustion engine such as a valve, piston, cylinder liner or seat portion. The member has a welded high temperature corrosion resistant facing alloy with a hardness increased by use of a precipitation hardening mechanism based on a solid state phase transformation. The facing alloy has a temperature of activation of the precipitation hardening mechanism that is above the operating temperature of the alloy. The participation hardening mechanism acts so slowly that the alloy has not hardened at welding on the cylinder member Hardening occurs during a subsequent heat treatment at a temperature higher than the activation temperature for the participation hardening mechanism.