机械专业毕业论文外文翻译-偏心轴热处理.doc

Eccentric shaft heat treatment and mechanical properties research Abstract This paper focuses on the eccentric shaft material 20Cr heat treatment (carburizing, quenching, a tempering, and second tempering) process and its main mechanical properties, high hardness is main properties. Analysis how Carburizing temperature ,time an, cooling method ,direct quenching ,a quenching, secondary quenching and other factors defect on the mechanical properties and organization from the theory. After confirmed 20Crs eccentric shaft’s best heat treatment process parameters and the best carburizing quench way (salt bath, direct quenching, low temperature tempering), analysis and detect the infiltration depth of the carburized, microstructure and mechanical parts.Key words: eccentric shaft, heat treatment, carburizing, carburizing temperature, cooling method, carburized layer ChapterⅠThe introduction Preface The role of the eccentric shaft is to adjust the center distance between convenient, eccentric shaft is usually used in the V-belt drive in the planar linkage. Normal shaft can only drive the work piece, but the eccentric shaft, not only can pass the rotation, also can pass the revolution. Now the U.S. compressor giant Copeland is using eccentric shaft to drive the vortex of revolution and efficient compression formulations fast. Eccentric shaft is an important transmission part of electric tool electricity hammer. Install the eccentric shaft and let it running to dead spots position will not produce locks by inertia effect. The most common example is: household sewing machine feet moving wheel of the operation. Rotating eccentric shaft driven machine is the indispensable machinery parts. Schematic diagram of the eccentric shaft 1.2 The purpose of the eccentric shaft and performance requirements Eccentric shaft is widely used in mining, electromechanical, water conservancy, etc. With the increase in the production of these products, and consumer groups asked