Results 251 to 260 of about 4,294 (302)

Nature and diagnostics of nonmetallic inclusions in steels

Russian Metallurgy (Metally), 2012
The chemicomineralogical nature of nonmetallic inclusions (NIs) in a number of steel grades prepared by traditional melting, elecroslag refining, and casting has been studied. Suboxides and phases having variable nonstoichiometric compositions are found to comprise nonmetallic inclusions.
V. V. Lunev, V. P. Pirozhkova
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Nonmetallic inclusions in high-speed steel

Metal Science and Heat Treatment of Metals, 1962
1. Various nonmetallic inclusions — oxides, brittle and plastic silicates, and globular bodies — may be encountered in high-speed steel. 2. High-speed steel is primarily contaminated by brittle inclusions the amount of which most frequently corresponds to numbers 3–5 of the TsNIIChM scale.
Ye. A. Smol'nikov, A. S. Badayeva
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Nature of nonmetallic inclusions in alloy 58N

Metal Science and Heat Treatment, 1973
1. Alloy 58N, serially produced and used for manufacturing precision scales, is highly contaminated with nonmetallic inclusions, most of which are titanium nitrides and aluminum oxides. These inclusions make it difficult to obtain a high-quality mirror surface on scales, due to which the accuracy of precision machine tools decreases.
G. A. Tarnovskii, Yu. A. Gratsianov, V. P. Ovcharov, L. I. Yakukhina, S. N. Chirkova, L. P. Kulikova   +5 more
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Hydrogen embrittlement of steel with nonmetallic inclusions

Metal Science and Heat Treatment, 1973
1. Instead of the ductile cracks observed in the metal free of hydrogen, facets of quasibrittle fracture perpendicular to the tensile force are observed around nonmetallic inclusions in samples saturated with hydrogen. 2. Cracks of quasibrittle fracture are formed around large crystalline inclusions but not around sulfides in steel ...
V. P. Krylov, N. I. Vorob'eva
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Nonmetallic Inclusions and Rolling Contact Fatigue

1975
Rolling contact fatigue tests were carried out on an angular contact ball bearing test rig at a low unit pressure (Po = 260 kp/mm2). The results show a sound “relative correlation” between the rolling contact fatigue and the content of nonmetallic inclusions.
K Böhm, H Schlicht, O Zwirlein, R Eberhard   +3 more
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Bearing Steels: The Rating of Nonmetallic Inclusion

1975
Description The symposium on Rating of Nonmetallic Inclusion in Bearing Steels was presented at May Committee Week of the American Society for Testing and Materials held in Boston, Mass., 22-24 May 1974. Committee A01 on Steel, Stainless Steel, and Related Alloys, Subcommittee A01.28 on Bearing Steels, sponsored the symposium. J. J.
JJC Hoo, PT Kilhefner, JJ Donze
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Role of Nonmetallic Inclusions in Fatigue, Pitting, and Corrosion Fatigue

Corrosion, 1996
A study was conducted of the effect of nonmetallic inclusions on the fatigue and corrosion fatigue resistance of a high-strength steel in 0.6 M sodium chloride (NaCl) solutions. Results indicated that angular calcium-aluminate inclusions played an important role in introducing cracks during air fatigue cycling; however, sulfide inclusions appeared to ...
Wang, Y, Akid, R
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Solidification, Segregation, and Nonmetallic Inclusions

2018
Abstract Many of the structural characteristics of steel products are a result of changes that occur during solidification, particularly volume contractions and solute redistribution. This chapter discusses the solidification process and how it affects the quality and behaviors of steel.
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Method for evaluating the content of nonmetallic inclusions in steels

Metal Science and Heat Treatment, 1995
Methods for evaluating the content of nonmetallic inclusions in ShKh 15, ShKH5SG, and ShKh20SG steels used for rolling bearings are considered. These methods can be applied to other steels used for various parts that fail in operation due to fatigue spalling.
O. H. Chermenskii, V. V. Kovalev
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Influence of nonmetallic inclusions on the fatigue strength of metals

Materials Science, 2007
A model of growth of short fatigue cracks in the vicinity of nonmetallic inclusions in crystalline metallic materials is proposed. We establish the influence of inclusions on the fatigue strength of materials of this type. A conclusion is made that the inclusions whose typical size is smaller than the grain size exert practically no influence on the ...
V. V. Panasyuk, V. P. Sylovanyuk, N. A. Ivantyshyn   +2 more
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