What Is The Best Steel For Spur Gears?
Dec 10, 2024| Gear steel is a general term for steel materials that can be used for processing and manufacturing gears. Generally, low-carbon steel such as 20 # steel, low-carbon alloy steel such as 20Cr, 20CrMnTi, etc., medium carbon steel such as 35 # steel, 45 # steel, etc., and medium carbon alloy steel such as 40Cr, 42CrMo, 35CrMo, etc. can all be called gear steel. This type of steel usually has good strength, hardness, and toughness after heat treatment according to usage requirements, or has a wear-resistant surface and good toughness and impact resistance in the core.
1) 42CrMo gear steel has the characteristics of high strength, high hardenability, good toughness, small deformation during quenching, and high creep strength and endurance strength at high temperatures.
Used for manufacturing forgings with higher strength and larger quenched and tempered section requirements than 35CrMo steel, such as large gears for locomotive traction, turbocharger transmission gears, pressure vessel gears, rear axles, connecting rods and spring clips under high loads; It can also be used for drill pipe joints and salvage tools in oil deep wells below 2000m; And it can be used for molds of bending machines, etc.
2) 20CrMnTiH is a high-performance carburizing steel with high hardenability. After carburizing and quenching, it has a hard and wear-resistant surface and a tough core? Has high low-temperature impact toughness, moderate weldability, and good machinability after normalizing.
Used for manufacturing important parts with a cross-section<30mm that can withstand high-speed, medium or heavy loads, impacts and friction; Such as gears, ring gears, gear shaft cross heads, etc. It is a substitute steel for 18CrMnTi, widely used as carburizing parts in automobiles Tractor industry is used for cross-sections below 30mm; Endure high speeds Medium or heavy load and impact Important carburizing parts for friction; Like gears Axis Ring gear Gear shaft The main shaft of sliding bearings Cross head Claw clutch Worm gear, etc