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YASSIAN or Your's
The advantages of carburized steel in edge gear materials
Carburized steel has significant advantages in the application of edge teeth in construction machinery, mainly reflected in the following core performance dimensions:
1. Youdaoplaceholder1 surface ultra-high hardness and wear resistance
The tooth surface hardness reaches HRC 58-62 (such as 20CrMnTi), which is much higher than that of quenched and tempered steel (HRC 40-50), and can resist the severe wear of hard materials such as ores and rocks .
Deep carburizing strengthening (layer depth ≥ 0.8mm ) forms a gradient structure, significantly enhancing the resistance to pitting corrosion and increasing the wear resistance life by more than three times compared to ordinary steel .
Comparative case : In the blasting operation of mines, the contact fatigue life of carburized steel edge teeth exceeded 10^7 cycles , significantly reducing the frequency of shutdown and replacement .
2. The core has high toughness and impact resistance
The design of low-carbon alloy matrix (such as 20CrNiMo) ensures core toughness (tensile strength ≥ 735 MPa, impact energy ≥ 40 J), effectively absorbs dynamic impact loads, and avoids brittle fracture under heavy load conditions.
The "hard shell soft core" gradient structure disperses stress concentration, and its overload resistance is 50% higher than that of homogeneous materials .
Material type surface hardness (HRC) core toughness (impact energy) applicable scenarios
Carburized steel 58-62 ≥ 40 J ore/rock heavy load operation
Quenched and tempered steel 40-50 20-30 J light load earthwork operation
Steel nitride >850 HV ≥ 35 J high-temperature precision transmission
III. Comprehensive adaptability of under heavy load conditions
Fatigue resistance optimization :
The residual compressive stress of the carburized layer inhibits crack propagation, and the bending fatigue limit of the tooth root is increased by 30% compared with quenched and tempered steel.
Economic balance :
Although the initial cost is 40% higher than that of quenched and tempered steel, due to the extension of service life by three times , the comprehensive maintenance cost is reduced by 60%.
Process compatibility :
Compatible with post-treatment such as induction hardening and shot peening to further optimize surface roughness (≤ Ra 0.2 μm) and reduce bonding risk .
⚠️ Precautions : Carburized steel should be avoided from being used in light-load earthwork operations. Otherwise, due to the overly hard tooth surface, the bucket filling rate will be reduced, which will instead increase energy consumption .
technical specification recommendations
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# Key Parameters for Selecting Carburized steel edge teeth
- Material grades: 20CrMnTi, 20CrNiMo
- Carburized layer depth: ≥ ‌ "0.8mm" ‌" (Rock conditions require ≥ ‌** 1.2mm **‌) - Surface hardness: ‌
**HRC 58-62**‌
Core hardness: ‌ **HRC 30-40**‌
- Thermal deformation rate: ≤ ‌ * * * * 0.05% & ZWNJ; (Precise control of quenching process
Carburized steel achieves the optimal balance of wear resistance and fracture resistance in harsh working conditions of heavy load and high impact through a gradient design of " hard surface and tough core ". Youdaoplaceholder2
The advantages of carburized steel in edge gear materials
Carburized steel has significant advantages in the application of edge teeth in construction machinery, mainly reflected in the following core performance dimensions:
1. Youdaoplaceholder1 surface ultra-high hardness and wear resistance
The tooth surface hardness reaches HRC 58-62 (such as 20CrMnTi), which is much higher than that of quenched and tempered steel (HRC 40-50), and can resist the severe wear of hard materials such as ores and rocks .
Deep carburizing strengthening (layer depth ≥ 0.8mm ) forms a gradient structure, significantly enhancing the resistance to pitting corrosion and increasing the wear resistance life by more than three times compared to ordinary steel .
Comparative case : In the blasting operation of mines, the contact fatigue life of carburized steel edge teeth exceeded 10^7 cycles , significantly reducing the frequency of shutdown and replacement .
2. The core has high toughness and impact resistance
The design of low-carbon alloy matrix (such as 20CrNiMo) ensures core toughness (tensile strength ≥ 735 MPa, impact energy ≥ 40 J), effectively absorbs dynamic impact loads, and avoids brittle fracture under heavy load conditions.
The "hard shell soft core" gradient structure disperses stress concentration, and its overload resistance is 50% higher than that of homogeneous materials .
Material type surface hardness (HRC) core toughness (impact energy) applicable scenarios
Carburized steel 58-62 ≥ 40 J ore/rock heavy load operation
Quenched and tempered steel 40-50 20-30 J light load earthwork operation
Steel nitride >850 HV ≥ 35 J high-temperature precision transmission
III. Comprehensive adaptability of under heavy load conditions
Fatigue resistance optimization :
The residual compressive stress of the carburized layer inhibits crack propagation, and the bending fatigue limit of the tooth root is increased by 30% compared with quenched and tempered steel.
Economic balance :
Although the initial cost is 40% higher than that of quenched and tempered steel, due to the extension of service life by three times , the comprehensive maintenance cost is reduced by 60%.
Process compatibility :
Compatible with post-treatment such as induction hardening and shot peening to further optimize surface roughness (≤ Ra 0.2 μm) and reduce bonding risk .
⚠️ Precautions : Carburized steel should be avoided from being used in light-load earthwork operations. Otherwise, due to the overly hard tooth surface, the bucket filling rate will be reduced, which will instead increase energy consumption .
technical specification recommendations
markdown
Copy Code
# Key Parameters for Selecting Carburized steel edge teeth
- Material grades: 20CrMnTi, 20CrNiMo
- Carburized layer depth: ≥ ‌ "0.8mm" ‌" (Rock conditions require ≥ ‌** 1.2mm **‌) - Surface hardness: ‌
**HRC 58-62**‌
Core hardness: ‌ **HRC 30-40**‌
- Thermal deformation rate: ≤ ‌ * * * * 0.05% & ZWNJ; (Precise control of quenching process
Carburized steel achieves the optimal balance of wear resistance and fracture resistance in harsh working conditions of heavy load and high impact through a gradient design of " hard surface and tough core ". Youdaoplaceholder2
