1. Overview. GH49 nickel-base superalloy is a metal material with excellent high-temperature strength, which is characterized by excellent tensile, creep and oxidation resistance at high temperatures. As an important aerospace material, it is widely used in the manufacture of turbine discs, combustion chambers and other key components of aero engines. This article will introduce in detail the characteristics, properties, manufacturing process and application fields of GH49 nickel-based superalloy round bar.
2. Characteristics of GH49 nickel-based superalloy round bar.
1.High temperature strength: GH49 nickel-based superalloy round bar has extremely high yield strength and lasting strength at high temperatures, and can maintain excellent mechanical properties at high temperatures above 600 °C.
2.Creep performance: At high temperatures, the creep strength and creep rate of GH49 nickel-based superalloy round bars are low, which can effectively resist deformation and failure at high temperatures.
3.Oxidation resistance: GH49 nickel-based superalloy round bars have good oxidation resistance at high temperatures, which can effectively resist high-temperature oxidation and corrosion.
4.Manufacturing process: The manufacturing process of GH49 nickel-based superalloy round bar is complex, and it needs to go through multiple processes such as forging and heat treatment, which is difficult to manufacture.
5.Applications: Due to its excellent high-temperature properties, GH49 nickel-based superalloy round bars are widely used in the manufacture of key components in aerospace, energy, chemical and other fields.
3. Performance of GH49 nickel-based superalloy round bar.
1.Chemical composition: The chemical composition of GH49 nickel-based superalloy round steel is mainly composed of nickel, chromium, molybdenum, aluminum and other elements, of which the content of nickel element is relatively high, about 50% or more.
2.Mechanical properties: GH49 nickel-based superalloy round steel has excellent mechanical properties, and its tensile strength, yield strength, elongation and hardness are high. At high temperatures, its mechanical properties can still maintain a high level.
3.Physical properties: The physical properties of GH49 nickel-based superalloy round bars include melting point, specific heat capacity, thermal conductivity, etc. It has a high melting point, about 1260, and the specific heat capacity and thermal conductivity are also excellent.
4.Corrosion resistance: GH49 nickel-based superalloy round bars have good corrosion resistance at high temperatures, and can effectively resist oxidation, vulcanization and corrosion.
5.Processability: GH49 nickel-based superalloy round steel has poor processing performance, and it needs to be processed and heat treated for many times to complete manufacturing. At the same time, it is easy to produce defects such as cracks during processing, and corresponding measures need to be taken to control them.
Fourth, the manufacturing process of GH49 nickel-based superalloy round steel.
1.Smelting: The smelting of GH49 nickel-based superalloy round steel is carried out by vacuum induction furnace smelting or electroslag remelting. In the smelting process, it is necessary to control the chemical composition and impurity content and other indicators.
2.Forging: The forging of GH49 nickel-based superalloy round bars requires multiple passes of processing and heat treatment at high temperatures to be completed. In the forging process, parameters such as deformation and temperature need to be controlled to avoid defects such as cracks.
3.Heat treatment: The heat treatment of GH49 nickel-based superalloy round steel includes solution treatment and aging treatment. By adjusting the heat treatment process parameters, the best mechanical properties and corrosion resistance can be obtained.
4.Machining: The machining of GH49 nickel-based superalloy round bars requires machining operations such as turning, milling, and drilling. During the processing process, corresponding measures need to be taken to control it to avoid defects such as cracks.
5. Application fields of GH49 nickel-based superalloy round bars.
Due to its excellent high-temperature properties, GH49 nickel-based superalloy round bars are widely used in the manufacture of key components in the aerospace field. For example, it can be used to make turbine discs, combustion chambers and other critical components of aero enginesIt can also be applied to the manufacture of key equipment in the fields of shipbuilding, energy and chemical industry.