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Survey of the theory of mechanical face seals—part III. Dynamic and interfacial fluid effects
SYSTEMATIC
ABSTRACTS
OF CURRENT LITERATURE
Design, Operation and Lubrication Tractor-motor Gears and Gear Cases.
of
H. H. Koci and P. R. Bien, Lubrication Eng., 24 (12) (1968) 565-571; 7 figs., I table, 2 refs. The paper describes the problems associated with the design and operation of tractionmotor gearing and suggests solutions to some of the problems. The subject is divided into three areas, gear and pinion set, gear case and lubrication of the gears. Laboratory cants.
Evaluation
of Worm-gear
Lubri-
D. D. Domonoski, Lubrication Eng., .zg (12) (1968) 572-585; g figs., r3 tables, 9 refs. The paper compares the laboratory bench test performance of seven commercially available petroleum lubricants currently used in wormgear service. Accelerated wear and oxidation tests have been modified more closely to simulate worm-gear conditions. The results suggest that certain types of e.p. gear lubricants may out-perform compounded oils containing acidless tallow in worm-gear service. Survey of the Theory of Mechanical Face Seals-Part III. Dynamic and Interfacial Fluid Effects.
L. H. Bernd, Lubrication Eng., 24 (12) (1968) 597-604; r fig., 3 tables, 62 refs. Industrial
Filter Media.
A. London, Engineering, 207 (5368) (1969) 443-444; 6 figs. This is an outline of the subject covering basic facts, rating performance factors and classification of filters. Different filter media including paper, felts, cloths, sintered metal. absorbent material are described as well as the different types of filters available and their principles of operation.
5. AMATERIALS
AND WEAR
5.1. Materials and zerearresistance Corrosion and Abrasive-wear Properties of Precipitation-hardening Stainless Casting Steel. (in Czech)
A. Kabrhel, Mater. Sb., Statni Vyzkum. Ustav Mater. Technol., (Materials Miscellany-Steels for high temperatures and corrosive media) (1966) 171-190; 17 figs., 3 tables, 16 refs. The paper deals with tests of corrosion and abrasion resistance of seven different types of hardenable stainless steels for castings. On the basis of test results two types were selected for performance tests of pump components and mixing equipment exposed to combined corrosion and abrasion in the chemical industry.
375
Effect of Carbide Reactions on the Strengthening of Cobalt-base, Hard-facing Alloys. (in Czech)
K. Lobl, Mater. Sb., Statni Vyzkum. Ustav Mater. Technol., (MaterialsMiscellany-Steels for high temperatures and corrosive media) (1966) 191-210: 20 figs., 2 tables, 5 refs. A description is given of the variations of hardness of both laboratory and production scale melts of cobalt-based hard-facing alloys in the course of prolonged isothermal annealing during which the carbide phases precipitate and coagulate. The mode of precipitation has been investigated by electron microscopy on fracture surfaces of specimens subjected to various heat treatments. The results are discussed. Mechanical ised Layers.
Properties
of Diffused
Chrom-
F. P. Ponomarenko, A. I. Plyshevskii, V. P. Khokhlov and L. I. Filina, Soviet Mater. Sci., 3 (2) (1967) 128-130; 5 figs., I table. (Translation by the Faraday Press, New York, of Fiz.-Khim. Mekhan. Mater., 3 (2) (1967) 178-181.) The mechanical properties of thermo-diffused layers obtained by vacuum chromising of steel were studied. It was established that to produce strong and ductile chromised layers by this method it is necessary to decarburise the substrate material before or after the treatment. Wear of Metals in Sucrose Solutions. N. A. Sologub, Soviet Mater. Sci., 3 (2) (1967)
139141; 5 figs., I table, 8 refs. (Translation by the Faraday Press, New York: of Fiz.-Khim. Mekhan. Mater., 3 (2) (1967) 193-196.) A study of the wear of steel rubbing against cast iron, bronzes and babbit in aqueous solutions containing up to 80% sucrose. The maximum resistance to wear was shown by the steel/bronze 5-5-5 combination and the minimum by the steel/babbit combination. At sucrose concentrations above 60% abrasive wear associated with the presence of sucrose needles becomes predominant; the steel/cast iron combination shows the least wear and the steel/babbit combination the largest. Wear and coefficient of friction of the steel/bronze 9-4 combination continuously decrease with increase of sucrose concentration. Effect of Electrisation and Small Direct Currents on the Wear of Metals in Sliding Friction. L. G. Korshunov and R. I. Mints, Soviet Mater. Sci., 3 (4) (1967) 284-287; 4 figs., 2 tables, 4 refs. (Translation by the Faraday Press, New York, of Fiz.-Khim. Mekhan. Mater., 3 (4) (1967) 392-396.) The magnitude and direction of thermally wear> =3 (1969) 371-379
ABSTRACTS
OF CURRENT LITERATURE
Design, Operation and Lubrication Tractor-motor Gears and Gear Cases.
of
H. H. Koci and P. R. Bien, Lubrication Eng., 24 (12) (1968) 565-571; 7 figs., I table, 2 refs. The paper describes the problems associated with the design and operation of tractionmotor gearing and suggests solutions to some of the problems. The subject is divided into three areas, gear and pinion set, gear case and lubrication of the gears. Laboratory cants.
Evaluation
of Worm-gear
Lubri-
D. D. Domonoski, Lubrication Eng., .zg (12) (1968) 572-585; g figs., r3 tables, 9 refs. The paper compares the laboratory bench test performance of seven commercially available petroleum lubricants currently used in wormgear service. Accelerated wear and oxidation tests have been modified more closely to simulate worm-gear conditions. The results suggest that certain types of e.p. gear lubricants may out-perform compounded oils containing acidless tallow in worm-gear service. Survey of the Theory of Mechanical Face Seals-Part III. Dynamic and Interfacial Fluid Effects.
L. H. Bernd, Lubrication Eng., 24 (12) (1968) 597-604; r fig., 3 tables, 62 refs. Industrial
Filter Media.
A. London, Engineering, 207 (5368) (1969) 443-444; 6 figs. This is an outline of the subject covering basic facts, rating performance factors and classification of filters. Different filter media including paper, felts, cloths, sintered metal. absorbent material are described as well as the different types of filters available and their principles of operation.
5. AMATERIALS
AND WEAR
5.1. Materials and zerearresistance Corrosion and Abrasive-wear Properties of Precipitation-hardening Stainless Casting Steel. (in Czech)
A. Kabrhel, Mater. Sb., Statni Vyzkum. Ustav Mater. Technol., (Materials Miscellany-Steels for high temperatures and corrosive media) (1966) 171-190; 17 figs., 3 tables, 16 refs. The paper deals with tests of corrosion and abrasion resistance of seven different types of hardenable stainless steels for castings. On the basis of test results two types were selected for performance tests of pump components and mixing equipment exposed to combined corrosion and abrasion in the chemical industry.
375
Effect of Carbide Reactions on the Strengthening of Cobalt-base, Hard-facing Alloys. (in Czech)
K. Lobl, Mater. Sb., Statni Vyzkum. Ustav Mater. Technol., (MaterialsMiscellany-Steels for high temperatures and corrosive media) (1966) 191-210: 20 figs., 2 tables, 5 refs. A description is given of the variations of hardness of both laboratory and production scale melts of cobalt-based hard-facing alloys in the course of prolonged isothermal annealing during which the carbide phases precipitate and coagulate. The mode of precipitation has been investigated by electron microscopy on fracture surfaces of specimens subjected to various heat treatments. The results are discussed. Mechanical ised Layers.
Properties
of Diffused
Chrom-
F. P. Ponomarenko, A. I. Plyshevskii, V. P. Khokhlov and L. I. Filina, Soviet Mater. Sci., 3 (2) (1967) 128-130; 5 figs., I table. (Translation by the Faraday Press, New York, of Fiz.-Khim. Mekhan. Mater., 3 (2) (1967) 178-181.) The mechanical properties of thermo-diffused layers obtained by vacuum chromising of steel were studied. It was established that to produce strong and ductile chromised layers by this method it is necessary to decarburise the substrate material before or after the treatment. Wear of Metals in Sucrose Solutions. N. A. Sologub, Soviet Mater. Sci., 3 (2) (1967)
139141; 5 figs., I table, 8 refs. (Translation by the Faraday Press, New York: of Fiz.-Khim. Mekhan. Mater., 3 (2) (1967) 193-196.) A study of the wear of steel rubbing against cast iron, bronzes and babbit in aqueous solutions containing up to 80% sucrose. The maximum resistance to wear was shown by the steel/bronze 5-5-5 combination and the minimum by the steel/babbit combination. At sucrose concentrations above 60% abrasive wear associated with the presence of sucrose needles becomes predominant; the steel/cast iron combination shows the least wear and the steel/babbit combination the largest. Wear and coefficient of friction of the steel/bronze 9-4 combination continuously decrease with increase of sucrose concentration. Effect of Electrisation and Small Direct Currents on the Wear of Metals in Sliding Friction. L. G. Korshunov and R. I. Mints, Soviet Mater. Sci., 3 (4) (1967) 284-287; 4 figs., 2 tables, 4 refs. (Translation by the Faraday Press, New York, of Fiz.-Khim. Mekhan. Mater., 3 (4) (1967) 392-396.) The magnitude and direction of thermally wear> =3 (1969) 371-379