Coefficient of β-stabilization of titanium alloysAntipov, A.; Moiseev, V.
doi: 10.1007/BF02471366pmid: N/A
The coefficient of β-stabilizationK
β was introduced in Russia for titanium alloys in the seventies. It makes it possible to determine the class of the alloy from its chemical composition and evaluate approximately the mechanical properties. The present paper concerns the effect of various elements and the cooling rate in quenching onK
β. The limits of application of the coefficient of β-stabilization are determined.
Effect of the heat-treatment regime and carbon content on the damping properties of steel 01Kh6F2Potekhin, B.; Potekhin, A.
doi: 10.1007/BF02471367pmid: N/A
The high damping properties of ferrite chromium steels caused by magnetoelastic hysteresis depend substantially on the defects of the crystal structure. For this reason the regimes of mechanical and heat treatment can change their damping level by more than a factor of 10. Elimination of thermal stresses and deformations in parts, prevention of formation of carbides, intermetallic compounds or chemical inhomogeneities in the structure of steels, and the reduction of the specific surface of the boundaries are known, but still insufficiently studied, ways of attaining a highly damped state in steels and alloys. The present work concerns the effect of the mentioned factors and some others on the damping properties of a ferrite steel of grade 01 Kh6F2. Another object of study is the effect of a variable magnetic field on the damping and the defect of the shear modulus. The results obtained are analyzed to interpret the regular features established.
Formation of a structure of single-phase α-solid solution in Kh30K15M3 alloys under the conditions of phase hardeningShubakov, V.; Menushenkova, N.; Samarin, B.
doi: 10.1007/BF02471368pmid: N/A
An α→(α+σ) transformation commonly accompanies the production of castings of highly coercive alloys based on Fe−Cr−Co−Mo. The presence of a σ-phase in the structure of the alloys decreases markedly their technological properties and makes the heat treatment for a highly coercive state inefficient. For this reason the alloys are transformed to the state of a single-phase α-solid solution before plastic deformation, mechanical, or thermomagnetic treatment. However, the effect of the α←(α+σ) transformation on the structure of the α-solid solution formed in the reverse transformation has not been studied yet. The present work is devoted to the problem. The study concerns the structure of the α-solid solution obtained in firing Kh30K15M3 alloys with different contents and morphologies of the σ-phase in the single-phase region.
Laws of structure formation and magnetic properties of magnetically hard alloys based on the Fe−Cr−Co systemVintaikin, B.
doi: 10.1007/BF02471369pmid: N/A
The increasingly stringent requirements on modern equipment lead to the creation of special alloys that possess a specific set of physical, mechanical, and other properties for the most efficient operation of machine parts and equipment. This group includes magnetically hard alloys for electronics and electrical engineering that should possess variable magnetic properties in combination with high mechanical and other characteristics. In each case attainment of the requisite set of properties is a complicated problem that takes much resources and time. In this connection the development of methods for manufacturing these alloys by means of predicting and computing at least some of their properties is of great practical interest and will make it possible to replace a major portion of lengthy and expensive experiments by computer methods.
Wear and fatigue resistances of metastable steel-copper pseudoalloysAntsiferov, V.; Shatsov, A.; Smyshlyaeva, T.
doi: 10.1007/BF02471370pmid: N/A
As a rule the quality of parts made of powder materials is evaluated by the criteria of structural strength, which very often do not reflect their actual operating capacity. This is connected not only with the scale factor, because specimens of rather large size are required for correct determination of crack resistance, but also with the special features of porous steels with a nonuniform concentration. The present paper concerns results of a study of the fatigue and wear resistances of metastable steel-copper pseudoalloys that are copper-infiltrated powder steels.
A new quenching medium for metals and alloysKulikov, A.
doi: 10.1007/BF02471373pmid: N/A
The machine-building and tool industry widely uses mineral oils as quenching media. They possess optimum cooling characteristics for many steels and alloys but have some defects, including inflammability and contamination of the atmosphere of heat-treatment shops with vapors of organic substances. In addition, a soot that is difficult to wash off is formed on the surface of the treated parts. Numerous attempts to eliminate these drawbacks have not been successful. The present paper considers the properties of a new fireproof oil-base medium.