Crawler crane track roller is an essential part of crawler crane undercarriage, playing a vital role in ensuring the stability and mobility of the crane. For this reason, it’s important for us to learn the knowledge about track roller’s craftmanship in order to selecting the highest quality products.
good start for producing crawler crane track roller-choose material
Our crawler crane track rollers use 42CrMo steel. This track roller material is an ultra-high-strength steel known for its high strength, toughness, and good hardenability. It is a versatile alloy that exhibits several desirable mechanical properties.
Chemical composition of 42CrMo steel
Material | C(%) | Si(%) | Mn(%) | Mo(%） | Cr（%） | S,P(%) |
42CrMo | 0.38-0.45 | 0.17-0.37 | 0.5-0.8 | 0.15-0.25 | 0.19-1.2 | ≤0.035 |
key characteristics of 42CrMo steel
- High strength and toughness: 42CrMo steel has excellent tensile strength and toughness, making it suitable for applications that require high load-bearing capacity and resistance to deformation.
- Hardenability: This track roller material has good hardenability, which means it can effectively harden throughout its cross-section when subjected to heat treatment processes like quenching and tempering. This allows for the formation of a hardened surface while maintaining a relatively tough core.
- No obvious tempering brittleness: 42CrMo steel exhibits minimal brittleness after tempering, which is an important property for ensuring the reliability and safety of the track roller material in various applications.
The main process for producing crawler crane track roller
The manufacturing process of a crawler crane track roller involves several steps:
- Blanking: The material is cut into the desired shape to create the initial blanks for the track roller components.
- Forging: The blanks are subjected to a forging process, which involves heating the material and shaping it under pressure to enhance its strength and structural integrity.
- Rough Machining: Excess material is removed from the forged blanks through rough machining operations such as turning, milling, or grinding. This helps achieve the desired dimensions and prepares the blanks for further processing.
- Heat Treatment: The rough-machined components undergo a heat treatment process to improve their hardness, toughness, and other mechanical properties. Common heat treatment methods include quenching and tempering, which increase the material’s strength and durability.
- Welding: Different components of the track roller are joined together using welding techniques. Welding provides a strong and reliable connection between the parts, ensuring the track roller can withstand the operational loads.
- Finishing: The welded track roller undergoes further machining and polishing to achieve the final dimensions and surface finish required. This step helps remove any remaining imperfections and ensures the components are smooth and properly aligned.
- Assembly: All the individual components, including the welded and finished parts, are assembled to form the complete track roller. This involves fitting bearings, seals, and other necessary elements to ensure proper functioning.
- Painting: The assembled track roller is painted or coated to provide protection against corrosion and other environmental factors. The paint or coating helps extend the lifespan of the track roller and maintain its appearance.
- Storage and Shipment: The finished track rollers are stored in a warehouse until they are ready for shipment or use. Proper storage ensures their safety and prevents any damage before they reach their intended destination.
what's the superior craftsmanship Of the process for track roller?
tempering treatment
Mechanical property
Material | Heat treatment | Yield strength | Tensile strength | Elongation | End shrinkage | V-shaped impact absorbs work | Annealing or high temperature tempering supply condition Brinell hardness HBS≤217 |
Material | Heat treatment | σ s/Mpa | σ b/Mpa | δ 5/(%) | ψ(%) | AK/J | Annealing or high temperature tempering supply condition Brinell hardness HBS≤217 |
42CrMo | Quench 840/ oil back 540/ oil | 930 | 1080 | 12 | 45 | 63 | 217 |
Tempering treatment refers to quenching and tempering at high temperature. The purpose of tempering is to adjust the performance and material of steel to a great extent, its strength, plasticity and toughness are good, it has good comprehensive mechanical properties.
induction heating
The workpiece is put into the inductor (coil), and when the inductor is passed into a certain frequency of alternating current, the surrounding alternating magnetic field is generated. Surface quenching can achiev by rapid cooling after the heating layer temperature exceeds the critical point temperature of the steel
the advantages of induction heating
- There is no need for overall heating, the workpiece deformation is small, and the power consumption is small.
- Heating speed is fast, the surface oxidation and decarburization of the workpiece are light.
- nuisanceless
- Surface hardening layer can adjust according to needs and is easy to control.
- Heating equipment can install on the machining production line, easy to realize mechanization and automation, it is easy to manage, and can reduce transportation, save manpower, improve production efficiency.
- Hardened martensite has finer structure, higher hardness, strength and toughness.
Conclusion
Crawler crane track rollers are the unsung heroes, working tirelessly to provide stability, mobility, and seamless operation for these mighty machines. By recognizing their importance, implementing proper maintenance practices, and choosing reliable components, operators can unlock maximum performance and reliability from their crawler crane fleet. Embrace the power of crawler crane track rollers and witness the difference they make in your construction and lifting endeavors.
If you want to buy a track roller, please take a look at our products. Our track rollers are fully branded, such as HITACHI, LIEBHERR, DEMAG, IHI and so on. If you have any questions, contact us immediately, and we are sure to give you a satisfactory answer. Finally, brows our home page to find your favorite products.
