Elsevier Sequoia S.A., Lausanne
Tribology and Terotechnology in the Steel Industry-The Need for Integrated Planning. R. S. Burton, Iron and Steel, 43 (6) (1970) 367-
373; 5 figs. The principles and organisation required to obtain the maximum benefits from the correct choice of lubricant, lubrication system and planned maintenance are discussed.
1. DEFORMATION, TURE
The Structure and Fractography Tungsten Carbide.
A. Mason and P. Kenny, MetaNurgia, 82 (494) (1970) 205-212, 10 figs., 20 refs. Electron microscopical and lineal analysis techniques for studying the structure and fractography of cemented tungsten carbide are described. The correlation between fracture characteristics and structure parameters are described.
2. SURFACE PROPERTIES, AND FRICTION
2.1 Surface properties State of External Layer of Quartz Plates after Precision [email protected]
S. A. Popov et al., Russian Eng. J., 50 (2) (1970)
87-90; 5 figs., 2 tables, 4 refs. (Transl. by P.E.R.A. of Gt. Britain of Vestn. Mushinostr., 50 (2) (1970) 73-76.) The thickness of the damaged layer on the surface of ground quartz plates can be considerably reduced by the use of diamond grinding wheels instead of suspended abrasives such as silicon carbide and alumina. The mechanism of polishing is discussed. Microfmishing Complicated Profile (Internal and External Surfaces. Sh. M. Bilik et al., Russian Eng. J., 50 (4) (1970) 59-62; 1 fig., 2 tables, 3 refs. (Transl. by P.E.R.A. of Gt. Britain of Vestn. Mushinostr., 50 (4) (1970) 55-57.)
in the Netherlands
Specific examples of microfinishing with oscillating abrasive stones of roller bearing races. The process of honing is recommended for inner and outer surfaces of hardened steel components. 2.2. Adhesion and friction Frictional Behaviour in Metalworking
M. B. Peterson and F. F. Ling, JOLT, 92 Ser. F (4) (1970) 535-542; 13 figs., 1 table, 17 refs. Frictional behaviour in metal-working processes between the tool and workpiece under unlubricated conditions is discussed. Experimental and theoretical work was carried out to determine the important variables of metal-working friction. Friction is dependent upon the strength of the workpiece, the pressure, the surface adhesion and the surface roughness The pressure dependence of shear strength based on experimental data is discussed. Techniques to predict friction are dependent upon prediction of the interface surface temperature. The Measurement of Friction and Friction Induced Vibration.
P. L. Ko and C. A. Brockley, JOLT, 92 Ser. F (4) (1970) 543-549; 11 figs., 6 refs. The design, development and application of a pin on disc tribometer for the measurement of friction and friction induced vibration is described. The use of acceleration, velocity and displacement transducers with a one-cycle triggering circuit and other electronic equipment allowed the accurate measurement of kinetic friction forces in the presence of friction induced vibration. Many of the errors commonly encountered in friction and vibration measurement are reduced or eliminated. Quasi-Harmonic Friction Induced Vibration. C. A. Brockley and P. L. Ko, JOLT, 92 Ser. F (4) (1970) 55&556; 14 figs., 13 refs.
A theoretical and experimental investigation of quasi-harmonic friction induced vibration is reported. The vibration is of near sinusoidal form and is solely governed by dynamic friction forces but the friction velocity curve must be of a particular shape for the vibration to occur. The amplitude of the quasi-harmonic vibration increases with sliding velocity until oscillation Wear, 18 (1971) 259-266