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Effectiveness of operation of anti-cavitation additives. (in Russian)
37s
SYSTEMATIC
ABSTRACTS
OF CURRENT LITERATURE
Within the next decade, the cost of composites should fall enough to enable their use in many conventional applications.
0. 1NSTHUMENTATION
Advances in Coating Materials and Techniques. C. Chambers, Corvosion Prevent. Control, 16 (2) (1969) 10-13. Survey of advances in materials and methods of application of powdered plastics for coating purposes and suggested future developments.
International Accord in Laboratory Tests on 15-3. Anon., A bvasiolz-Resistant Nems, Climax AIolybdenum Co., New York., Dec. (1968) 8 pp.; 5 figs., 3 tables. New testing and application developments in high-chromium molybdenum cast irons suitable for a wide range of wear-resistant roles particularly where a mild degree of corrosive action might also be anticipated. Uata sheets are available on modifications of the r5--3 alloy.
Optimum Conditions for Turning and Burnishing to Improve Wear Resistance. P. G. Alekseev, Russian Eng. J., 48 (2) (1968) 62-64; 2 figs., I table, 4 refs. (Translation of Vestn. Mash&o&., 48 (2) (1968) 56-58 by P.E.R.A. of Gt. Britain.) The article describes tests to determine the effect of machining prior to ball and roller burnishing on the wear resistance of normalised carbon steel subjected to boundary friction conditions. The optimum properties of the surface layer are largely determined by the machining method and the cutting speed used. The Cavitation Resistance of White-cast Irons. I.,. I. I,evi et al., Russian Eng. J., 48 (2) (1968) 73-75; 3 figs., 2 tables, 2 refs. (Translation of Vestn. Mashinostv. 48 (2). (1968) 66-67 by P.E.1Z.A. of Gt. Britain.) An impact jet type was used to obtain comparative data on the cavitation resistance of cast irons. The white chromium cast irons investigated had a cavitation resistance many times greater than carbon steel; some were not inferior to cavitation-resistant steel. The of cavitation resistance on dependence structure is discussed. Effectiveness of Operation of Anti-cavitation Additives. (in Russian) T. M. Petukhova and A. L. Korzhenko, f~~zPrgomashinostvoelzie, (Power Engineering), (3) (1969) 29-31; G figs., 5 refs. .2 contemporary problem in diesel engines is considered, cavitation erosion of the surface of high-speed engine cylinders washed by the cooling water. The principles of the operation of various additives on the water are stated and the limits of their application are indicated. Metallographic Aspects of Wear. F. LVilson and T. S. Eyre, Metals Matev., 3 (3) (1969) 86-91; 12 figs., 11 refs. The authors indicate that metallographic investigation is likely to yield valuable information concerning the mechanism of wear damage leading to the development of methods for its control. lt’ear, 13 (1969) 371-379
6.2. Testmg
of machine
XNI> TESTING parts
Correlation of Disc Machines and Wear Tests. G. H. Benedict, Lubrication Eng., zq (12) (1908) 591-596; 2 figs., 3 tables, 16 refs. The correlation of disc machines and gear tests was approached by considering research results on elastohydrodynamic lubrication, lubrication theory and experience with response of chemical e.p. additives. A correlation is obtainable if the surface velocities, radius of curvature, temperature history ant1 load history of the gear-tooth surfaces arc simulated in the disc machine. Using this method two such correlations were obtdinctl between a modified SAE-EP (disc) test and the 2000 r.p.m. IhE gear test and between another disc machine and the Ryder gear test. Investigation and Radioisotopes in the Automation of Wear Measurement. V. I. Postnikov, published by Mashinostroenii, 1967, 140 pp. For list of contents see Russian Eng. ,I., 48 (2) (1968) 98. (Translation of I’estlz. Mashinostr., 48 (2) (1968) 88 by P.E.R.A. of Gt. Britain.) Development and Use of an Abrasion Test for Cast Irons and Steels. J. W. Boyes, Iron Steel, 42 (I) (1969) 57-63; 19 figs., 5 tables, 28 refs. An abrasion test developed at BCIKA was used to assess the wear characteristics of a wide range of cast irons and steels abraded by sand. The effect of load, time, strain hardening of the abraded surface and breakdown of the abrasive are discussed. The results show no general relationship between bulk hardness of the materials and abrasion resistance but a relationship between surface hardness after testing and abrasion resistance. It is concluded that whilst major alloy development in this field seems improbable, specific improvements may be possible for closely defined service conditions. It is considered that the simple test could be used to study abrasion untlcr a wide range of conditions.
SYSTEMATIC
ABSTRACTS
OF CURRENT LITERATURE
Within the next decade, the cost of composites should fall enough to enable their use in many conventional applications.
0. 1NSTHUMENTATION
Advances in Coating Materials and Techniques. C. Chambers, Corvosion Prevent. Control, 16 (2) (1969) 10-13. Survey of advances in materials and methods of application of powdered plastics for coating purposes and suggested future developments.
International Accord in Laboratory Tests on 15-3. Anon., A bvasiolz-Resistant Nems, Climax AIolybdenum Co., New York., Dec. (1968) 8 pp.; 5 figs., 3 tables. New testing and application developments in high-chromium molybdenum cast irons suitable for a wide range of wear-resistant roles particularly where a mild degree of corrosive action might also be anticipated. Uata sheets are available on modifications of the r5--3 alloy.
Optimum Conditions for Turning and Burnishing to Improve Wear Resistance. P. G. Alekseev, Russian Eng. J., 48 (2) (1968) 62-64; 2 figs., I table, 4 refs. (Translation of Vestn. Mash&o&., 48 (2) (1968) 56-58 by P.E.R.A. of Gt. Britain.) The article describes tests to determine the effect of machining prior to ball and roller burnishing on the wear resistance of normalised carbon steel subjected to boundary friction conditions. The optimum properties of the surface layer are largely determined by the machining method and the cutting speed used. The Cavitation Resistance of White-cast Irons. I.,. I. I,evi et al., Russian Eng. J., 48 (2) (1968) 73-75; 3 figs., 2 tables, 2 refs. (Translation of Vestn. Mashinostv. 48 (2). (1968) 66-67 by P.E.1Z.A. of Gt. Britain.) An impact jet type was used to obtain comparative data on the cavitation resistance of cast irons. The white chromium cast irons investigated had a cavitation resistance many times greater than carbon steel; some were not inferior to cavitation-resistant steel. The of cavitation resistance on dependence structure is discussed. Effectiveness of Operation of Anti-cavitation Additives. (in Russian) T. M. Petukhova and A. L. Korzhenko, f~~zPrgomashinostvoelzie, (Power Engineering), (3) (1969) 29-31; G figs., 5 refs. .2 contemporary problem in diesel engines is considered, cavitation erosion of the surface of high-speed engine cylinders washed by the cooling water. The principles of the operation of various additives on the water are stated and the limits of their application are indicated. Metallographic Aspects of Wear. F. LVilson and T. S. Eyre, Metals Matev., 3 (3) (1969) 86-91; 12 figs., 11 refs. The authors indicate that metallographic investigation is likely to yield valuable information concerning the mechanism of wear damage leading to the development of methods for its control. lt’ear, 13 (1969) 371-379
6.2. Testmg
of machine
XNI> TESTING parts
Correlation of Disc Machines and Wear Tests. G. H. Benedict, Lubrication Eng., zq (12) (1908) 591-596; 2 figs., 3 tables, 16 refs. The correlation of disc machines and gear tests was approached by considering research results on elastohydrodynamic lubrication, lubrication theory and experience with response of chemical e.p. additives. A correlation is obtainable if the surface velocities, radius of curvature, temperature history ant1 load history of the gear-tooth surfaces arc simulated in the disc machine. Using this method two such correlations were obtdinctl between a modified SAE-EP (disc) test and the 2000 r.p.m. IhE gear test and between another disc machine and the Ryder gear test. Investigation and Radioisotopes in the Automation of Wear Measurement. V. I. Postnikov, published by Mashinostroenii, 1967, 140 pp. For list of contents see Russian Eng. ,I., 48 (2) (1968) 98. (Translation of I’estlz. Mashinostr., 48 (2) (1968) 88 by P.E.R.A. of Gt. Britain.) Development and Use of an Abrasion Test for Cast Irons and Steels. J. W. Boyes, Iron Steel, 42 (I) (1969) 57-63; 19 figs., 5 tables, 28 refs. An abrasion test developed at BCIKA was used to assess the wear characteristics of a wide range of cast irons and steels abraded by sand. The effect of load, time, strain hardening of the abraded surface and breakdown of the abrasive are discussed. The results show no general relationship between bulk hardness of the materials and abrasion resistance but a relationship between surface hardness after testing and abrasion resistance. It is concluded that whilst major alloy development in this field seems improbable, specific improvements may be possible for closely defined service conditions. It is considered that the simple test could be used to study abrasion untlcr a wide range of conditions.