Gear forgings are an essential component of engineering machinery, and the selection of materials and smelting technology in their production are key factors affecting their quality, service life, etc. This article aims to explore the research on the selection of materials and smelting technology for high-performance engineering machinery gear forgings.
I. Characteristics of high-performance engineering machinery gear forgings
High-performance engineering machinery gear forgings require high strength, high hardness, wear resistance, corrosion resistance, and other characteristics, especially for large-power, high-speed, heavy-load conditions, which have stricter performance requirements. Therefore, choosing the appropriate materials and smelting technology is particularly important.
II. Selection of materials for high-performance engineering machinery gear forgings
- Metallic materials
Metallic materials have excellent properties such as high strength, high hardness, wear resistance, high temperature resistance, corrosion resistance, etc., and are widely used in the production of high-performance engineering machinery gear forgings. Common metallic materials include carbon steel, cast iron, low alloy steel, high alloy steel, etc. Among them, high-strength low-alloy steel can improve wear resistance and toughness while ensuring strength and hardness.
- Non-metallic materials
Non-metallic materials are also an option. UGS (Unsaturated Polyester Resin Glass Fiber Reinforced Composite Material) is an excellent non-metallic material that has advantages such as low density, high thermal stability, etc., and is particularly suitable for producing large-scale engineering machinery gear forgings.
III. Research on smelting technology for high-performance engineering machinery gear forgings
- Smelting methods
Common smelting methods include vacuum induction melting, vacuum self-consumption electric heating melting, plasma spray arc melting, coating arc melting, etc. For the smelting of high-performance engineering machinery gear forgings, the LF/VOD precise casting method is often used.
- Smelting control technology
Improving smelting control technology is also an important factor affecting material properties. Currently, electromagnetic stirring furnaces are widely used in gear forging production to effectively eliminate uneven organization in the metal flow.
- Alloy design
In the research of smelting technology, alloy design is also an important direction. Alloy design mainly adjusts the alloy element content to improve material properties. For example, adding some strengthening phases can improve alloy hardness, toughness, and wear resistance.
IV. Conclusion
The selection of materials and smelting technology for high-performance engineering machinery gear forgings are essential factors in the product’s performance. This article explores the common metallic and non-metallic materials used in high-performance engineering machinery gear forgings and the smelting methods and control measures for these materials. It provides reference value for practitioners in related fields.
