摩阻材料的研制及其静摩擦因数变化规律

许多实际工况要求在较高压力下，使用静摩擦因数大于０．３５的材料。为此自行设计了两个试验台，测试比较了粉末冶金材料、火焰喷涂材料、等离子辅助沉积材料和等离子喷涂材料的静摩擦因数及其随载荷的变化规律，探讨了粗糙表面与光滑面配对时静摩擦因数变化的机理。静摩擦因数随载荷的变化规律与摩擦副材料的相对硬度有关。粉末冶金材料的静摩擦因数在０．１～０．２之间，并随压力的升高而降低；火焰喷涂材料与软材料配对时静摩擦因数大，与硬材料配对时静摩擦因数小；等离子辅助沉积材料静摩擦因数小，与基体结合强度小；等离子喷涂Ａ１２Ｏ３－ＴｉＯ２材料的静摩擦因数大于０．４。

Research on friction materials and their static frictional properties

Materials made by powder metallurgy, torch spray, iron beam enhanced deposition and plasma spray are studied. The static friction coefficients of these materials changing with pressure are investigated. The static friction coefficient is closely related to the pressure and the differences between the surface hardness of the two contact materials. The powder metallurgy materials have the static friction coefficients of 0.1 0.2 which will decrease with the increase of pressure, and torch spray materials have the higher static friction coefficients when they contact with soft materials and lower ones when they contact with hard materials. Materials made by iron beam enhanced deposition have the smaller static friction coefficient and coherence strength. The coating of Al 2O 3 TiO 2 made through plasma spray has a static friction coefficient higher than 0.4 under the pressure of 6 MPa.