工程机械多路阀阀芯表面改性强化技术

Engineering Machinery Multi Way Valve Spool Surface Strengthening Technology

工程机械多路阀阀芯表面镀铬的重大缺陷是烧焦、针孔、麻点、凹坑,在直角棱边上呈锯齿状剥离。这些缺陷最大问题是产生毛刺和影响环保,美欧等发达国家已经禁止六价铬使用。随着工程机械对整体式多路阀的"可靠性"、"耐久性"要求的提高,迫切需要一种比镀铬更环保、更耐磨、更耐腐蚀的技术来取代阀芯传统的镀铬工艺。该文简要介绍了QPQ技术在多路阀阀芯表面改性强化上的应用。

The major defects of engineering machinery valve spool were charred, pinholes, pits, pit, serrated stripping in the right an1 gle edge. The burr and influence of environmental protection of these defects is produced, six valence chromium plated surface is Prohibited in developed countries such as the United States. A new technology for a more environmentally fiiendly, more wear- resistant, more corro1 sion resistant was needed to replace the traditional chromium plating process, for the reliability and durability requirements ofconstruction machinery＇ s the integral multi way valve. The application of QPQ technology in reinforcement of the multi- channel valve spool surface modification was briefly introduced.