超细蛇纹石粉体的材料特性、摩擦学介入行为及其工业应用

The Material Characteristic and Tribological Intervention Behaviors of Hyper-fine Serpentine Powder and Its Industrial Application

采用X射线衍射分析(XRD)、差热分析(DTA)、氮吸附-脱附(Nitrogen adsorption-desorption)等方法测试超细蛇纹石粉体在物理形态、表面特征、晶体结构、热反应和相变等方面的材料特性。初步分析其之所以能成为减摩修复剂主要功能组分的材料学基础。采用扫描电子显微镜(SEM)和纳米压痕法(Nano-indentation)等手段对摩擦磨损试验的试件进行摩擦因数、表面形貌和表面硬度的观测,证实在润滑油中介入以这种粉体为主的功能材料可使摩擦表面改性,继而提高表面摩擦学性能。而以超细蛇纹石粉体为主要原料的金属减摩修复剂在铁路内燃机车柴油机应用的初步成效,则从生产实践上证明这种功能物质介入摩擦副的有效性和它的实用价值。

The material characteristics of hyper-fine serpentine powder concerning its physical style, surface feature, crystal structure, thermal feedback and phase transition were tested by X-ray diffraction （XRD） , differential thermal analysis （DTA） and nitrogen adsorption-desorption methods. The preliminary explanation by Material Science was given ,upon which the hyper-fine serpentine powder can be used as a major functional composition of some friction reducing and surface restoring products. Using scanning electron microscopy （SEM） and nano-indentation,the friction coefficient, surface profile and surface hardness of friction and wear test specimen were measured and observed. It is proved that the friction surfaces can be improved and the tribological characteristic can be further enhanced by intervening functional material made mainly of this powder into lubricating oil. The application of friction reducing and surface restoring products, in which the hyperfine serpentine powder is used as raw material in railway locomotive diesel engines obtained initial success, it was verified the effectiveness and practical value of this functional material intervening into friction pairs.