10Ni3MnCuAl钢加工表面析出硬化层的性能研究

Characteristics of precipitation-hardening layer on 10Ni3MnCuAl steel machined surface

对10Ni3MnCuAl钢磨削、电火花加工表面完整性进行了研究,测量出表面析出硬化层的显微硬度、三维形貌及表面粗糙度,并用X射线衍射法(XRD)分别测试了10Ni3MnCuAl钢析出硬化层的残余应力,得到磨削、电火花加工试样不同深度处残余应力的变化规律。实验结果表明,与电火花加工相比,使用磨削方式加工10Ni3MnCuAl钢可以得到较好的表面完整性,应力集中敏感性较低,而对复杂形状的零件进行加工时,电火花加工有磨削加工不可比拟的优势,为提高10Ni3MnCuAl钢加工表面完整性提供了依据。

The integrity of grinding and spark machined surface on 10Ni3MnCuAl steel was researched. micro hardness,3-D topography and surface roughness of precipitation-hardening layer on 10Ni3MnCuAlwere measured. Residual stress of precipitation-hardening layer on 10Ni3MnCuAl steel was separately measured by XRD. And the variation of residual stress of grinding and spark machined samples in different depth was obtained. The experiment results showed that preferable integrity of grinding surface on 10Ni3MnCuAl steel was obtained in comparison with spark machining, and the sensibility stress concentration was lower. For machining parts of complicated shape, spark machining inimitable superior than grinding. Basis was provided for increasing integrity of machined surface on 10Ni3MnCuAl steel.