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Theory and Experiment Research on Ultrasonic Shot Peening

Author: ZuoLinLin
Tutor: LuShiHong
School: Nanjing University of Aeronautics and Astronautics
Course: Materials Processing Engineering
Keywords: Ultrasonic shot peening Mechanical vibration and shock loads Residual compressive stress Microhardness Numerical Simulation
CLC: TG668
Type: Master's thesis
Year: 2010
Downloads: 248
Quote: 1
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Abstract


Ultrasonic shot peening technology is a new type of surface treatment technology , its principle is transformed by the ultrasonic mechanical shock and vibration loads acting on the metal surface of the material , in order to achieve the strengthening or the purpose of forming metal parts . On the basis of theoretical studies , a preliminary exploration of the ultrasonic shot peening technology . According to the results of experimental observation and measurement , explore homemade peening device the spray sheet strengthening and shaping role play ; physical processes based on ultrasonic shot peening using ABAQUS / Explicit software to simulate the impact of a single striker , the impact of the five firing pin board material residual stress distribution . The main tasks are as follows: 1. Studied ultrasonic shot peening impact load acting on the surface of the sheet metal of the physical processes , analyzed by the depth of the spray sheet metal surface pits residual stress theoretical calculation model . Homemade ultrasonic shot peening device Q235 steel specimen ultrasonic shot peening experiments on the material of the plate by spraying the surface residual stress and microhardness measurements . Contrast pristine sample corresponding residual stress and hardness values ??spray , ultrasonic shot peening by spray sample has played a significant role in strengthening ; observed by spray sample forming curvature , and a brief analysis of the sample under different peening parameters shaping effects different. The sprayed sample electrolytic Drill polishing to observe a measurement result of the different thickness layer , the analysis of the distribution of the residual stress and the hardness in the direction of the thickness of the specimen ; 4 based on the physical process of the ultrasonic shot peening , the establishment of a finite element model using finite element analysis software ABAQUS / Explicit, ultrasonic shot peening impact of Q235 process simulation , analysis of the distribution of the residual stress of Q235 steel by spray process .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal cutting and machine tools > Special machine tools and processing > Surface hardening equipment and processing
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