Thermal Effects That Arise upon Different Heat Treatments in Austenitic Steels Alloyed with Titanium and Phosphorus

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作者
V. L. Arbuzov
I. F. Berger
V. I. Bobrovskii
V. I. Voronin
S. E. Danilov
V. A. Kazantsev
N. V. Kataev
V. V. Sagaradze
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[1] Russian Academy of Sciences,Institute of Metal Physics, Ural Branch
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austenitic steels; alloying with phosphorus; thermal effects;
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摘要
Structural and microstructural changes that arise in the course of the heat treatment of Cr–Ni–Mo austenitic stainless steels with different concentrations of titanium and phosphorus have been studied. It has been found that the alloying with phosphorus decreases the lattice parameter of these steels. The phosphorus contribution to this effect is 0.015 ± 0.002 Å/at %. Aging at a temperature of 670 K for about 20 h leads to the precipitation of dispersed needle-like particles, which are most likely to be iron phosphides. In the temperature range of 700–800 K, in austenitic steels, the atomic separation of the solid solution occurs, the intensity of which decreases upon alloying with titanium or phosphorus at concentrations of 1.0 and 0.1 wt %, respectively. At higher temperatures (about 950 K), the formed precipitates of the Ni3Ti (γ') phase increase in size to 7–10 nm.
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页码:368 / 373
页数:5
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