论文部分内容阅读
合理利用选择性转移效应，能够有效地延长摩擦零部件的使用寿命。但是，现用的大都是铜－钢或铜合金－钢选择性摩擦副，这在润滑不良情况下容易发生擦伤甚至咬死而造成机械零部件报废。因此，研制了一种钢背／青铜粉／（ＰＴＦＥ＋（Ｃｕ２Ｏ）三层复合材料，并且利用ＭＰＶ－１５００摩擦试验机对其分别在甘油润滑和三乙醇胺润滑下的摩擦学性能等进行了试验研究，结果表明，复合材料在甘油或三乙醇胺润滑下的摩擦系数比干摩擦时的低２个数量级，磨损量低１—２个数量级，极限ＰＶ值（约为１２０ＭＰａ·ｍ／ｓ）比干摩擦时的高２０倍以上；复合材料分别在甘油和三乙醇胺润滑时的摩擦性能均比２０＃机械油润滑时的好；甘油的减磨效果比三乙醇胺的好。电子探针观察发现，在甘油润滑下偶件４５＃钢磨损表面明显有呈现铜光泽的转移膜形成，而在三乙醇胺润滑下则基本没有。因此，在甘油润滑下，复合材料与钢配合可以作为具有良好摩擦磨损性能和较高极限ＰＶ值的滑动摩擦副在工程实际中应用。
Rational use of selective transfer effect, can effectively extend the service life of friction parts. However, most of the currently used copper-steel or copper alloy-steel selective friction pair, which in the case of poor lubrication easily bruised or even killed and caused the mechanical parts scrapped. Therefore, a steel-backed / bronze powder / (PTFE + (Cu2O) three-layer composite was developed and its tribological properties under glycerol lubrication and triethanolamine lubrication were tested by MPV-1500 friction tester The results show that the friction coefficient of the composite under the lubrication of glycerol or triethanolamine is two orders of magnitude lower than the dry friction and the wear loss is 1-2 orders of magnitude lower than the limit PV (about 120 MPa · m / s) 20 times higher than those of the composites.The tribological properties of the composites when lubricated with glycerol and triethanolamine were better than that of the 20 # Lubrication of the even part of 45 # steel wear surface showed copper transfer film formation was obvious, but under the triethanolamine lubrication is basically not.Therefore, under the lubrication of glycerol, the composite material and steel can be used as a good friction and wear properties and more High limit PV value of the sliding friction pair in engineering practice.