Cylindrical gear

helical-toothedmetalcarbon steel

Product Overview
Iron alloy gear is a gear made primarily from iron, with additional alloying elements such as carbon, manganese, chromium, and nickel. Due to its excellent performance and wide adaptability, iron alloy gear is one of the most commonly used gear materials. It is widely applied in various industries, including mechanical transmission, power transmission, automobiles, and aerospace.

Manufacturer Information
Hansheng Automation is an outstanding gear manufacturer, offering gear customization and processing services. Their gears are mainly applied in the construction machinery industry.

Features

• Good wear resistance: The addition of alloying elements enhances the wear resistance of the gear surface, reducing the risk of wear and pitting on the tooth surface and prolonging the service life of the gears. It performs particularly well in environments of long-term operation or high friction.
• Excellent fatigue performance: Iron alloy gear has relatively high fatigue strength, resisting fatigue damage under repeated stress. It ensures stable operation under frequent start-stop, speed changes, and other working conditions, reducing the probability of faults.
• Adjustable heat treatment performance: The performance of iron alloy gear can be further optimized through different heat treatment processes (such as quenching and tempering, carburizing, nitriding). For example, carburizing can create a high-hardness surface layer while maintaining core toughness, balancing wear and impact resistance.
• Dimensional stability: During casting or forging, iron alloy gear maintains good structural homogeneity and minimal size change after heat treatment, ensuring gear accuracy and transmission stability. Suitable for high-precision transmission systems.
• Corrosion resistance (for some alloys): Some iron alloy gears, such as stainless-steel gears, offer corrosion resistance, making them suitable for damp or corrosive environments.
• Cost-effectiveness: Compared to high-performance materials like non-ferrous alloys, iron alloys are more affordable and have a mature production process, offering a high cost-performance ratio for mass production.

Comparison of Mainstream Process Flows
Stage | Powder metallurgy process (recommended) | Traditional cutting processing method
raw materials preparation | Mix iron powder + alloy powder + lubricant | Forging/casting blanks
Forming method | Mold pressing (one-time forming of tooth profile) | Turning → hobbing/shaping/shaving
Heat treatment | Sintering + optional carburizing and quenching | Normalizing → carburizing and quenching → tempering
Finishing | Generally, no processing required; for high precision, need gear honing | Fine processing such as gear grinding and lapping
Production efficiency | High, suitable for mass production | Relatively low, involves many procedures and takes a long time
Material utilization rate | Over 95%, almost no waste | 40-70%, generating a large amount of chips

Common Types

• Carbon steel gear: Carbon is the main alloying element. Types include low-carbon (low cost, good processing, for light-load/low-speed), medium-carbon (good performance after quenching/tempering, for medium loads/speeds), and high-carbon (high hardness/wear resistance, for light-load, high wear resistance needs).
• Alloy steel gear: With added manganese, chromium, nickel, and molybdenum, these gears have higher strength, hardness, toughness, and heat resistance. Used in heavy load, high speed, and high temperature applications such as automotive transmissions and construction machinery.
• Stainless steel gear: Contains chromium and nickel, offering excellent corrosion and oxidation resistance. Suitable for damp, corrosive, or high hygiene environments like food processing, chemical engineering, and marine engineering.

Technical Parameters
Iron alloy gear | Parameters | Parameter range
| Accuracy level | ISO/DIN/GB level 5
| Module | 0.1-5.0
| Tooth tip diameter | 3mm-300mm

Applications

• Automobile
• Construction machinery
• Agricultural machinery
• Electric and hydraulic systems

FAQ

• Common materials for iron alloy gears: 20CrMnTi (typical carburized steel, high surface hardness, good core toughness, for heavy-duty gears), 40Cr (medium carbon alloy steel, good performance after quenching/tempering, for medium-precision/load gears), 42CrMo (high-strength alloy steel, excellent strength/toughness, for heavy-duty/large gears), 38CrMoAl (special steel for nitriding, high surface hardness, wear/corrosion resistance, for high-precision/long-life gears).
• Choosing precision grade: Low-precision (grade 8 and below) for general equipment, medium-precision (grades 7-8) for ordinary machine tools/light vehicles, high-precision (grade 6 and above) for precision instruments/aerospace/high-speed tools, requiring advanced processing like gear grinding.
• Factors affecting price: Material (higher alloy content increases cost), processing technology (complex/high-precision processes cost more), batch size (large-scale reduces unit cost), heat treatment requirements (special processes cost more), delivery cycle (urgent/special requirements increase cost).

Characteristics / Technical Specifications

• Main material: Iron alloy (with carbon, manganese, chromium, nickel, etc.)
• Accuracy level: ISO/DIN/GB level 5
• Module: 0.1-5.0
• Tooth tip diameter: 3mm-300mm
• Wear resistance, fatigue strength, adjustable heat treatment, dimensional stability, corrosion resistance (for some alloys), cost-effectiveness
• Applications: Mechanical transmission, power transmission, automobiles, aerospace, construction machinery, agricultural machinery, electric and hydraulic systems