In the field of mechanical manufacturing, using seamless steel tubes as blanks for rotary parts like shafts, sleeves, and rollers has become a mainstream process for optimizing material utilization and reducing production costs. Among these, 20# and 45# carbon steels are the two most commonly used materials, and their machinability directly impacts the final part quality and processing efficiency. Based on a deep understanding of customer machining environments, Changzhou Tenjan Steel Tube Co., Ltd. is committed to providing seamless steel tube products with excellent machinability, assisting customers in achieving efficient transformation from blank to finished product.

Machining Special Seamless Steel Tubes for Shaft Parts

Material Characteristics Comparison: The Underlying Logic Determining Machinability

20# steel and 45# steel exhibit distinct machining characteristics due to their different compositions. 20# steel, a low-carbon steel, has relatively low hardness with good plasticity and toughness. This results in lower cutting forces during machining, but it also has a stronger tendency to adhere to tools, easily causing "built-up edge" formation, which can affect the finish of the machined surface. 45# steel, a medium-carbon steel, offers higher strength and hardness after normalizing. It demonstrates better chip-breaking performance during cutting, facilitating a higher surface finish, but places greater demands on tool wear resistance. Tenjan Steel Tube ensures consistent material hardness and microstructural uniformity through precise control of chemical composition and heat treatment processes, laying the foundation for stable machining operations.

Processing Efficiency Optimization: Process Adaptation Strategies Based on Material

Optimizing machining strategies according to the different characteristics of the two materials is key to improving efficiency:

For 20# steel seamless steel tubes: It is recommended to use sharp tool geometries and ample coolant to reduce built-up edge. Appropriately increasing cutting speed helps mitigate the effects of plastic deformation, serving as an effective way to enhance processing efficiency and surface quality for this material.

For 45# steel seamless steel tubes: Due to their higher strength, ensuring the rigidity of the machining system and selecting carbide tools with good red hardness are necessary. Employing moderate cutting speeds combined with higher feed rates can achieve desired metal removal rates while ensuring tool life. The technical service team at Changzhou Tenjan Steel Tube Co., Ltd. often provides tailored cutting parameter recommendations based on the customer's specific machine tool conditions and tooling situation.

Tenjan Steel Tube

The Value of Tenjan Steel Tube: Providing "Easier-to-Machine" Blanks

The value of a high-quality seamless steel tube for machining lies not only in its compliant material but also in its ability to facilitate subsequent processing. Tenjan Steel Tube optimizes product machinability through two major initiatives: Firstly, strictly controlling the straightness and wall thickness uniformity of seamless steel tubes to avoid interrupted cuts and vibration caused by blank eccentricity, thereby protecting tools. Secondly, employing preparatory heat treatments like normalizing to refine and homogenize the internal material structure, eliminating internal stresses, significantly improving machinability, and reducing the tendency for part deformation after machining.

Conclusion

In summary, selecting 20# or 45# seamless steel tube blanks for shaft parts essentially involves a comprehensive trade-off based on the part's strength requirements, surface quality goals, and machining costs. Understanding the differences in their cutting mechanisms and matching them with appropriate machining processes is key to unleashing CNC machine tool potential and achieving cost reduction and efficiency gains. Leveraging its comprehensive understanding of material properties and machining processes, http://www.tenjan.com/ not only provides reliable seamless steel tube products but is also committed to being a collaborative partner for manufacturing enterprises in enhancing their machining competitiveness.