Gear Materials, Properties, and Manufacture
Joseph R. Davis
ASM International, 2005 - Technology & Engineering - 339 pages
All of the critical technical aspects of gear materials technology are addressed in this new reference work. Gear Materials, Properties, and Manufacture is intended for gear metallurgists and materials specialists, manufacturing engineers, lubrication technologists, and analysts concerned with gear failures who seek a better understanding of gear performance and gear life. This volume complements other gear texts that emphasize the design, geometry, and theory of gears. The coverage begins with an overview of the various types of gears used, important gear terminology, applied stresses and strength requirements associated with gears, and lubrication and wear. This is followed by in-depth treatment of metallic (ferrous and nonferrous alloys) and plastic gear materials. Emphasis is on the properties of carburized steels, the material of choice for high-performance power transmission gearing.
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AGMA AISI alloy alloy steels annealed applications ASM International bending fatigue bevel gears burizing carbon carbonitriding carburized and hardened carburized steels compressive stress contact fatigue contact stress cooling core hardness cutter cutting cycles depth diametral pitch distortion ductile face width fatigue crack ﬁlm thickness ﬁrst ﬂank ﬂow forged fracture furnace Gear Manufacturers gear materials gear steels gear teeth gear tooth gearbox grinding hardened gears heat treat heat treatment helical gears hobbing Hot rolled hypoid inﬂuence load lubricant machining macropitting martensite metal method microstructure mold nitrided gears nitriding normal operation pinion pitting plastic quenching rack residual stress resistance retained austenite scufﬁng shear shear stress shot peening shown in Fig speciﬁc specimens spiral bevel spur gears steel gears strength surface hardness Table temperature tempered tensile tensile stress through-hardened tion tool tooth surface vacuum carburizing viscosity wear wheel workpiece worm
Page 16 - Si used chiefly as a component of pyrometric thermocouples. annealing. A generic term denoting a treatment, consisting of heating to and holding at a suitable temperature followed by cooling at a suitable rate, used primarily to soften metallic materials, but also to simultaneously produce desired changes in other properties or in microstructure. The purpose of such changes may be, but is not confined to: improvement of machinability, facilitation of cold work, improvement...
Page 16 - The temperature at which transformation of austenite to ferrite or to ferrite plus cementite is completed during cooling. Ar3. The temperature at which austenite begins to transform to ferrite during cooling. Ar4. The temperature at which delta ferrite transforms to austenite during cooling. Ar'.