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High-Hardness GCr15 Induction Hardened Drive Shaft | Precision Machined | Ra 0.4 Surface Finish
Header include
This product is a key moving component specially designed for automated equipment and precision transmission systems - a highly wear-resistant transmission shaft. It uses high-carbon chromium bearing steel GCr15 as the base material. Through high-frequency surface quenching, it achieves the best state of combining high hardness on the surface and strong toughness in the core. Finally, it is treated with hard chromium plating on the surface, thereby achieving a wear resistance life far exceeding that of ordinary parts, stable transmission accuracy and excellent rust prevention ability.
Abject of manufacture
1.Base material: GCr15 (High carbon chromium bearing steel). This material is renowned for its uniform microstructure, high and uniform hardness, and excellent dimensional stability, making it an ideal choice for manufacturing bearings, ball screws, and high-load transmission parts.
2.Heat treatment status: The working surface has undergone high-frequency induction hardening, with a surface hardness reaching HRC55-63, ensuring extremely high wear resistance while maintaining good toughness in the core to withstand impact loads.
3.Final state: After fine processing, the surface is treated with hard chromium plating. The surface roughness requirement for key mating parts is Ra ≤ 0.4μm.
Core features and requirements
1.Ultimate wear resistance and long service life: "High-frequency quenching HRC55-63" and "hard chromium plating" form a dual wear resistance guarantee. The quenched layer provides deep support hardness, while the hard chromium layer (typically 5-20μm in thickness and HV800-1000 in hardness) directly bears friction, significantly reducing the wear rate and greatly extending the service life of the shaft body and its mating parts (such as bearings and copper sleeves).
2.Outstanding anti-corrosion and anti-rust performance: The dense hard chromium plating layer can effectively isolate moisture and corrosive media, enabling the drive shaft to adapt to common working conditions such as coolant and environmental moisture in automated equipment, and avoiding precision loss or jamming faults caused by rust.
3.High precision and low frictional resistance: The surface finish of Ra 0.4 significantly reduces the frictional resistance and power loss of the shaft during operation, ensuring smooth transmission and low noise. At the same time, it helps prevent fretting wear and seizing phenomena.
4.High strength and fatigue resistance: GCr15 steel, when properly heat-treated, endows the drive shaft with a sufficient safety factor, enabling it to withstand continuous rotation, bending, and torque loads, and resist fatigue damage.
Key processes and technologies
To achieve the above-mentioned performance, its manufacturing process integrates the essence of various metal processing techniques
1.Precision mechanical processing and forming
(1)First, the rough and semi-finish machining of the shaft body is completed by a CNC lathe to reserve a reasonable allowance for subsequent heat treatment.
(2)Before heat treatment, all dimensions must be strictly controlled, especially for the parts that need quenching, the allowance should be uniform and consistent.
2.Local heat treatment technology
High-frequency induction hardening process is adopted. By taking advantage of the skin effect of alternating current, only the surface layer of the shaft (usually 1-3mm) is rapidly heated and immediately cooled, achieving the best combination of high surface hardness (HRC55-63) while maintaining strong toughness in the core, effectively avoiding the risk of deformation and cracking that may be caused by overall quenching.
3.Composite finishing and surface treatment:
(1)Precision grinding: After heat treatment, in order to correct the micro-deformation of quenching and achieve a mirror-like effect of Ra 0.4, a precision cylindrical grinding machine must be used to precisely grind the key mating surfaces. This is a decisive process to ensure dimensional accuracy and positional tolerance.
(2)Hard chromium plating: After fine grinding, the shaft parts enter the electroplating process. By precisely controlling the current density, temperature and time, a uniform and strongly bonded hard chromium layer is deposited on the surface. This process not only enhances the wear resistance and rust prevention performance, but sometimes also requires a slight "chrome post-polishing" to fine-tune the final size and further reduce the roughness.
Conclusion
This GCr15 drive shaft is a successful model of materials science, heat treatment technology and surface engineering. Through the synergistic effect of high-frequency quenching and hard chromium plating, it builds a functional layer on the surface of the parts that combines high hardness, low friction coefficient and excellent corrosion resistance while ensuring the core mechanical strength. It perfectly meets the strict requirements of modern automated equipment for high load, long service life and maintenance-free transmission components, and is a key basic component for enhancing the reliability and competitiveness of equipment.
High-Hardness GCr15 Induction Hardened Drive Shaft | Precision Machined | Ra 0.4 Surface Finish
Header include
This product is a key moving component specially designed for automated equipment and precision transmission systems - a highly wear-resistant transmission shaft. It uses high-carbon chromium bearing steel GCr15 as the base material. Through high-frequency surface quenching, it achieves the best state of combining high hardness on the surface and strong toughness in the core. Finally, it is treated with hard chromium plating on the surface, thereby achieving a wear resistance life far exceeding that of ordinary parts, stable transmission accuracy and excellent rust prevention ability.
Abject of manufacture
1.Base material: GCr15 (High carbon chromium bearing steel). This material is renowned for its uniform microstructure, high and uniform hardness, and excellent dimensional stability, making it an ideal choice for manufacturing bearings, ball screws, and high-load transmission parts.
2.Heat treatment status: The working surface has undergone high-frequency induction hardening, with a surface hardness reaching HRC55-63, ensuring extremely high wear resistance while maintaining good toughness in the core to withstand impact loads.
3.Final state: After fine processing, the surface is treated with hard chromium plating. The surface roughness requirement for key mating parts is Ra ≤ 0.4μm.
Core features and requirements
1.Ultimate wear resistance and long service life: "High-frequency quenching HRC55-63" and "hard chromium plating" form a dual wear resistance guarantee. The quenched layer provides deep support hardness, while the hard chromium layer (typically 5-20μm in thickness and HV800-1000 in hardness) directly bears friction, significantly reducing the wear rate and greatly extending the service life of the shaft body and its mating parts (such as bearings and copper sleeves).
2.Outstanding anti-corrosion and anti-rust performance: The dense hard chromium plating layer can effectively isolate moisture and corrosive media, enabling the drive shaft to adapt to common working conditions such as coolant and environmental moisture in automated equipment, and avoiding precision loss or jamming faults caused by rust.
3.High precision and low frictional resistance: The surface finish of Ra 0.4 significantly reduces the frictional resistance and power loss of the shaft during operation, ensuring smooth transmission and low noise. At the same time, it helps prevent fretting wear and seizing phenomena.
4.High strength and fatigue resistance: GCr15 steel, when properly heat-treated, endows the drive shaft with a sufficient safety factor, enabling it to withstand continuous rotation, bending, and torque loads, and resist fatigue damage.
Key processes and technologies
To achieve the above-mentioned performance, its manufacturing process integrates the essence of various metal processing techniques
1.Precision mechanical processing and forming
(1)First, the rough and semi-finish machining of the shaft body is completed by a CNC lathe to reserve a reasonable allowance for subsequent heat treatment.
(2)Before heat treatment, all dimensions must be strictly controlled, especially for the parts that need quenching, the allowance should be uniform and consistent.
2.Local heat treatment technology
High-frequency induction hardening process is adopted. By taking advantage of the skin effect of alternating current, only the surface layer of the shaft (usually 1-3mm) is rapidly heated and immediately cooled, achieving the best combination of high surface hardness (HRC55-63) while maintaining strong toughness in the core, effectively avoiding the risk of deformation and cracking that may be caused by overall quenching.
3.Composite finishing and surface treatment:
(1)Precision grinding: After heat treatment, in order to correct the micro-deformation of quenching and achieve a mirror-like effect of Ra 0.4, a precision cylindrical grinding machine must be used to precisely grind the key mating surfaces. This is a decisive process to ensure dimensional accuracy and positional tolerance.
(2)Hard chromium plating: After fine grinding, the shaft parts enter the electroplating process. By precisely controlling the current density, temperature and time, a uniform and strongly bonded hard chromium layer is deposited on the surface. This process not only enhances the wear resistance and rust prevention performance, but sometimes also requires a slight "chrome post-polishing" to fine-tune the final size and further reduce the roughness.
Conclusion
This GCr15 drive shaft is a successful model of materials science, heat treatment technology and surface engineering. Through the synergistic effect of high-frequency quenching and hard chromium plating, it builds a functional layer on the surface of the parts that combines high hardness, low friction coefficient and excellent corrosion resistance while ensuring the core mechanical strength. It perfectly meets the strict requirements of modern automated equipment for high load, long service life and maintenance-free transmission components, and is a key basic component for enhancing the reliability and competitiveness of equipment.
