GB/T 36042-2018 in English

1. Standard Overview

GB/T 36042—2018 Technical Specifications for Ultra-Supercritical Steam Turbine Rotor Forgings is my country's first technical standard specifically for ultra-supercritical steam turbine rotor forgings, aiming to ensure the quality and performance of such key components.

2. Background of Standard Formulation

With the rapid development of my country's power industry, ultra-supercritical steam turbines are increasingly used. As the core component of steam turbines, the quality and performance of rotor forgings are directly related to the safety and economy of power plants. This standard was born to meet industry needs and standardize production and technical requirements.

3. Comparison of standard frameworks

4. Interpretation of the main contents of the standard

4.2 Manufacturing process (Chapter 4)

The manufacturing process covers the following key links:

1. Smelting and casting: Electric furnace smelting + ladle refining + vacuum carbon deoxidation, or electroslag remelting process is required.
2. Forging: Emphasis on upsetting and drawing process, the total forging ratio of the shaft body ≥3.5.
3. Heat treatment: It is divided into post-forging heat treatment, performance heat treatment and stress relief treatment, and temperature control requirements are strict.

5. Implementation suggestions

To ensure the effective implementation of the standard:

• Enterprise level: Strengthen the quality management system, equip professional testing equipment and technical personnel.
• Industry level: Establish a standardization technical committee to promote the dissemination and application of the standard.
• Government level: Provide policy support to encourage enterprises to adopt advanced manufacturing processes.