XWD9105-29-2.2KW reducer cycloidal wheel is more suitable for carburizing and quenching. It can achieve the best balance of surface hardness and core toughness, and is especially suitable for your working conditions that require high wear resistance and impact resistance.
1. The core advantages of carburizing and quenching
The hardened layer is deep and the transition is gentle: The depth of the carburized layer is usually 0.5–2.5mm, the surface hardness can reach HRC58–62, and the core maintains 30–45HRC, which can effectively improve impact resistance and fatigue strength.
Good performance adaptability: Suitable for gear shafts with high impact, heavy load, large wear, etc., and can ensure the surface hardness and core toughness of parts under harsh working conditions.
Mature and stable process: Through carburizing, quenching, low-temperature tempering and other steps, internal stress can be effectively eliminated, making the surface of the part high hardness and wear resistance, the core toughness is good, and the comprehensive mechanical properties are excellent.
2. Limitations of other quenching methods
High-frequency quenching: The hardened layer is shallow (0.3–2mm), the surface hardened layer and the core are too steep, which easily produces concentrated stress. The impact resistance is slightly weak, and it is not suitable for high-impact and heavy-load conditions.
Vacuum quenching: Although it can reduce oxidation and deformation, the surface hardness and wear resistance may not be as good as carburizing quenching, and the cost is higher.
3. Process optimization suggestions
Material Selection: It is recommended to use high carbon chromium bearing steel (such as GCr15) with a carbon content of 0.95%-1.10% and a chromium content of 0.90%-1.20% to ensure hardenability and wear resistance.
Process Control: The carburizing temperature is recommended to be 900–950°C, the thickness of the carburized layer is generally 0.5–2mm, and the best carbon content on the surface of the carburized layer is 0.85–1.05.
Equipment selection: It is recommended to use a vacuum carburizing furnace. After vacuuming, the carburizing gas is introduced to heat the carburizing. The surface quality is good and the carburizing speed is fast.
4. Common defects and prevention
Unqualified hardness: It may be caused by insufficient quenching cooling rate, insufficient heating temperature or holding time, defects in the cooling process, etc.
Soft spots: The small areas with low surface hardness on the workpiece or after just quenching and hardening are called soft spots. They can be checked with a file. The soft spots are the places that are prone to misalignment.
Overheating and overburning: If the heating temperature is too high or the heating time is too long, the austenite grains will grow and become coarser, and the generated martensite will also become coarser. This phenomenon is called overheating.
5. Summary
Carburizing and quenching is superior in hardened layer depth, performance adaptability and process maturity, and can effectively improve the wear resistance and impact resistance of the cycloidal wheel. It is an ideal choice for the cycloid wheel of the XWD9105-29-2.2KW reducer.
