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Simulation and Experimental Study on Grinding Hardening Effect of 48MnV Non-quenched and Tempered Steel

Author: GongShengLai
Tutor: XiaoBing
School: Nanjing University of Aeronautics and Astronautics
Course: Mechanical Manufacturing and Automation
Keywords: 48MnV Grinding hardening Hardening layer depth Residual stress Friction and wear ANSYS
CLC: TG142.15
Type: Master's thesis
Year: 2008
Downloads: 78
Quote: 0
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Abstract


Non- quenched and tempered steel 48MnV as the research object , the strengthening layer depth grinding strengthened , residual stress and friction and wear characteristics of the study . The thesis, completed the following work . Grinding the the MMD7125 grinder 48MnV steel samples strengthening process test measuring the grinding force the grinding process Kistler9265B dynamometer , the semi-artificial thermocouple technology the grinding temperature curve , the grinding force and grinding temperature with the depth of cut increases and the cooling rate of the opposite trend ; using ANSYS simulation of grinding temperature field , compared with the measured temperature , maximum temperature , the relative error is less than 10% , and the temperature curve is roughly the same . HSX-1000 microhardness tester measurement grinding the specimen strengthening layer microhardness , KH-7700 3D digital micrograph of the microstructure of the strengthening layer , then the hardness curves and metallographic photo analysis were obtained hardening layer depth , both results are similar ; temperature field using ANSYS simulation results predict grinding hardening layer depth compared with the test results , the relative error in the range of 11.9% to 18% . MSF-3M Rigaku X-ray stress analyzer test grinding hardening layer surface residual stress ; using ANSYS simulation based on the analysis of the temperature field , the residual stress of grinding , simulation and experimental results are basically the same . UMT-2 micro tribometer grinding strengthen friction and wear testing of the surface of the sample , and then with MicroXAM non -contact surface of the three-dimensional morphology of the the morphologies the instrument observed surface grinding marks , wear scar width as the evaluation of surface wear amount of parameters , the results show that : grinding strengthen less friction and wear on the surface of the sample to play a positive role in the martensite phase transformations due to grinding strengthen occurred , the sample surface more resistant grinding strengthen wear width of the sample is smaller than the original sample .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metallic materials > Steel > Microstructure and properties of steel > Analysis of the steel test
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