水射流表层改性技术研究进展

Research Review on Surface Modification With Water Jet Peening Technology

运用水射流技术对高硬度渗碳淬火零件进行局部强化是表层改性研究的一个新兴方向。以表层改性应用为重点,依次介绍了纯水射流、后混合以及前混合水射流的特点及应用场合。在综合对比各种射流特点的基础上,提出了前混合射流是表层改性中较为理想的一种射流方式,并对前混合射流改性中存在的问题进行了探讨,认为混合射流在射流束形成、参数测量、喷嘴形状与使用寿命上需要深入研究,改性后变质层的表面完整性、表面质量的提升工序及高应力集中处的有效改性、形成射流的连续性和稳定性等问题有待进一步解决。在上述机理问题解决的基础上,对射流改性装备进行完善和提升,可以展开以齿轮、叶片、花键轴等具体零件为对象的工程应用研究。

Using water jet peening to strengthen local area of high-hardness carburized and quenched parts is a promising technology for surface modification.This paper focuses on the application of surface layer modification,and introduces the characteristics and applications of pure water jet,injection and suspension water jet in turn.On the basis of comprehensively comparing the characteristics of various jets,it is proposed that the suspension water jet is an ideal jet method in surface modification,and the problems existing in the modification of the suspension water jet peening are discussed.The jet formation,parameter measurement,nozzle shape and service life need to be further studied.Moreover,the surface integrity of modified layer,the fine process after water jet peening,the effective modification of high stress concentration area,the continuity of the formation of jet,and stability and other issues need to be concerned.On the basis of solving the above-mentioned mechanism problems,as well as improving the jet modification equipment,engineering application research on specific parts such as gears,blades,and spline shafts can be carried out.