If you have difficulty in submitting comments on draft standards you can use a commenting template and email it to admin.start@bsigroup.com. The commenting template can be found here.
Standards Development
This document specifies recommendations and requirements for the selection of coating materials, pretreatment, coating preparation and post-treatment, as well as quality and performance evaluation of laser cladding coatings used for cold hoppers, water walls, high-pressure turbine blades, and lowpressure turbine blades of thermal power generation equipment.
The purpose of this document is to provide recommendation and specification of laser cladding coatings for the core components of power plants. Thermal power generation, as the main form of power generation in the world, plays a critical role in ensuring energy security and economic development. However, the key components of power plants—cold ash hoppers, water walls, and highand low-pressure turbine blades—face severe challenges as they operate in high-temperature, corrosive, and abrasive environments for long periods of time. Cold ash hoppers are prone to wear and cracking due to ash erosion. Water walls suffer from high-temperature oxidation, sulfur corrosion, and coal ash erosion, which seriously affect boiler efficiency. And, turbine blades experience performance degradation due to steam erosion and particle erosion. Laser cladding coating technology has significant advantages in the surface protection of power generation equipment. Through the highenergy laser beam, the alloy powder is metallurgically combined with the substrate, giving the coating excellent bonding strength (up to 400 MPa or more), low dilution rate and minimal thermal impact. It is suitable for high-temperature, corrosive and wear-resistant environments. Its material selection is extensive (such as nickel-based, cobalt-based, and ceramic composite materials), and it can be customized for high-temperature oxidation resistance, corrosion resistance or wear resistance, significantly extending the lifespan of key components (such as gas turbine blades, boiler pipes). Compared with traditional processes, laser cladding combines high precision (micron-level), low deformation and environmental friendliness. It can not only repair expensive components to reduce costs, but also achieve uniform protection of complex geometric surfaces, and is an advanced surface engineering technology for improving the reliability and economy of power generation equipment. Up to now, there is no standard for the selection of coating materials, the pre-treatment, the preparation and post-treatment as well as the quality and performance evaluation of the laser cladding coatings, which limits the further development of laser cladding coatings. Therefore, the motivation of this document is to provide the laser cladding coating and its surface quality requirement including the pre-treatment of key components, the materials of the coatings, the preparation and post-treatment of the coatings, and the performance evaluation.
Required form fields are indicated by an asterisk (*) character.
You are now following this standard. Weekly digest emails will be sent to update you on the following activities:
You can manage your follow preferences from your Account. Please check your mailbox junk folder if you don't receive the weekly email.
You have successfully unsubscribed from weekly updates for this standard.
Comment by: