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51.
Structure and properties of carbon-containing spring steels after high-speed hardening and tempering
A. G. Rakhshtadt I. O. Dumanskii O. Yu. Tikhomirova 《Metal Science and Heat Treatment》1990,32(7):541-550
| 1. | After high-speed hardening of spring steels, the martensite is characterized by smaller size of crystals, predominantly of twinned type, high level of distortions, higher content of carbon but with its greater concentrational nonuniformity than after ordinary hardening with furnace heating. |
| 2. | A decisive influence on the properties of spring steels, in particular on the resistance to small plastic deformations (elastic limit 0.005), is exerted by residual austenite if contained in their structure, therefore after subzero treatment of hardened steel 0.005 greatly increases. |
| 3. | After high-speed hardening and subsequent high-speed tempering the maxima of the elastic and fatigue limits are attained with equal tempering time, viz., 3 sec, because of the decisive influence of the development of processes of microplastic deformations on these properties. To attain maximal relaxation resistance, greater stability of the structure and correspondingly longer high-speed tempering is required. |
52.
Puchkov B. I. Rakhshtadt A. G. Rogel'berg I. L. Gavze A. L. 《Metal Science and Heat Treatment》1965,7(3):156-161
Metal Science and Heat Treatment - 相似文献
53.
Rakhshtadt A. G. Aliev Ak. A. Elistratov A. V. Davydov A. D. 《Metal Science and Heat Treatment》2004,46(5-6):236-239
The effect of alloying of high-chromium nitrogen steels with manganese and nickel on their mechanical and corrosion properties is studied. Preferred modes of heat treatment providing the best combination of properties are presented. 相似文献
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V. M. Blinov E. I. Morozova A. G. Rakhshtadt M. V. Kostina A. I. Plokhikh 《Metal Science and Heat Treatment》1998,40(9):360-362
When a “superequilibrium” amount of nitrogen (0.9–1.3%) is introduced into corrosion-resistant low-carbon steel with about
18% chromium, the structure of the steel becomes completely austenitic after cooling to room temperature without alloying
with austenite-forming elements (Ni, Mn, Cu, Co). The structural transformations in cooling and heating such alloys, and hence
their properties, can be controlled by changing the nitrogen content.
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 9, pp. 13–15, September, 1998. 相似文献
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