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采用强力喷丸工艺对渗碳18Cr2Ni4WA钢试样进行了表面喷丸强化处理。利用Nano Test 600纳米测试仪、2903X射线应力仪和TR200表面粗糙度仪,分别测试分析了试样处理前后的显微硬度、残余应力和表面粗糙度,并在JP-52接触疲劳试验机上考察了喷丸强化处理对渗碳18Cr2Ni4WA钢接触疲劳性能的影响。试验结果表明:渗碳试样经强力喷丸后,在0～0.50 mm深的表层内形成一个喷丸硬化层,显微硬度提高了约1.1 GPa;最大残余压应力由-478 MPa提高到-760 MPa;表面粗糙度由1.255μm降为0.979μm。接触疲劳特征寿命VS与中值寿命L50均提高了2倍多,额定寿命L10提高了1倍多。
Using shot peening process carburizing 18Cr2Ni4WA steel samples were shot peening. Using Nano Test 600 nm tester, 2903 X-ray stress meter and TR200 surface roughness tester, the microhardness, residual stress and surface roughness of the sample before and after the test were respectively analyzed and tested. In the JP-52 contact fatigue tester, Effect of Shot Peening on Contact Fatigue Properties of 18Cr2Ni4WA Steel. The test results show that the shot peening layer is formed in the surface layer of 0-0.50 mm deep after carburization shot blasting, the microhardness increases about 1.1 GPa, and the maximum residual compressive stress increases from -478 MPa to - 760 MPa; surface roughness decreased from 1.255μm to 0.979μm. Contact fatigue characteristics of life VS and median life of L50 increased more than 2 times, L10 rated life has more than doubled.