论文部分内容阅读
采用磁场-电沉积方法在40Cr表面制备Ni-TiN镀层,利用显微硬度计、扫描电镜、EDS能谱仪等仪器研究磁场强度对Ni-TiN镀层的显微硬度、表面形貌、TiN粒子复合量及镀液电流效率的影响。结果表明:当磁场强度为0.9 T时,镀层显微硬度达到最大值,为730HV;TiN粒子复合量的质量分数达到最大值,为3.6%;电流效率达到最小值,为73%。SEM分析表明,当磁场强度为0.5 T时,Ni-TiN镀层的晶粒尺寸较大,表面较粗糙;当磁场强度为0.9 T时,镀层表面较平整,晶粒显著细化。
The Ni-TiN coating was prepared on the surface of 40Cr by magnetic field-electrodeposition method. The effects of magnetic field strength on the microhardness, surface morphology and TiN particle composites of the Ni-TiN coating were studied by means of microhardness tester, scanning electron microscope, EDS, Volume and bath current efficiency. The results show that when the magnetic field strength is 0.9 T, the microhardness of the coating reaches the maximum value of 730 HV, the mass fraction of TiN particles reaches 3.6%, and the current efficiency reaches the minimum of 73%. SEM analysis shows that the grain size of Ni-TiN coating is coarse and its surface is rough when the magnetic field strength is 0.5 T. When the magnetic field strength is 0.9 T, the surface of the coating is flat and the grains are remarkably refined.