【摘 要】
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The microstructure evolution and mechanical properties of the high carbon pearlitic steel after laser shock processing (LSP) with different impact times was investigated by means of scanning electron
【机 构】
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National United Engineering Laboratory for Advanced Bearing Tribology (Henan), Henan University of S
【出 处】
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第十一届全国表面工程大会暨第八届全国青年表面工程学术会议
论文部分内容阅读
The microstructure evolution and mechanical properties of the high carbon pearlitic steel after laser shock processing (LSP) with different impact times was investigated by means of scanning electron microscopy (SEM), tran mission electron microscopy (TEM), X-ray diffraction (XRD) and microhardness testing. Results show that after LSP, the cementite lamella are bent, fractured and broken into granules. The spheroidization of the cementite lamellae is aggravating with the LSP impact time increasing. After 6 LSP impacts, the cementite lamella are fully spheroidised with the particle diameter of 260 nm. The microhardness and surface residual stress increase with the LSP impact times. The microhardness increases by 18% from 300 HV (before LSP) to 353 HV (after 6 LSP impacts). The maximum value of surface residual stresses is -280 MPa after 6 LSP impacts.
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