Technology Exchange
Due to the advantages of High Efficiency, Energy Saving, Material Saving, Environmental Protection and Safety of induction heating,Induction Heating Technology quickly leads the traditional heating technology, and is widely used in all aspects of life and industry. Today, POLARIS-ETeK will show you about induction heating. Application of heating in steam turbine blade repair.
We all know that the blade of a steam turbine is a key part of a steam turbine. It is subjected to high temperature, high pressure, huge centrifugal force, steam force, steam excitation force, corrosion and vibration and the combined action of water droplet erosion in the wet steam area under extremely harsh conditions. .
Under such harsh conditions of use, steam turbine blades will inevitably be corroded and damaged after a period of use. Therefore, we need to regularly repair them, including welding and post-weld heat treatment.
The online repair of the blade is basically to shave off the damaged surface, use hard alloy (wear-resistant and corrosion-resistant alloy material) strips, and weld the alloy strips to the parent body by brazing to achieve the purpose of repair.
Due to the limitation of construction level, the common flame brazing is highly dangerous to use in power plants, and the induction heating technology developed by POLARIS-ETek solves the problems caused by open flames at this time, because induction heating makes the workpiece itself heat up and does not produce Open flames, thus greatly reducing the risk of field work.
After the welding repair is completed, if the blade is not heat treated, stress will be generated, so there is a risk of falling off, and the post-weld heat treatment can just ensure the bonding strength of the alloy sheet and the parent body and reduce rework.
post-weld heat treatment