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1.
A. A. Aliev A. V. Suetina A. V. Elistratov A. D. Davydov A. G. Rakhshtadt 《Metal Science and Heat Treatment》2007,49(1-2):75-77
The effect of tempering temperature on the structure, wear resistance, and corrosive properties of steel 08Kh14AN4MDB is studied.
The results of mechanical and corrosion tests are used for constructing an optimization matrix for determining the optimum
tempering temperature.
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 2, pp. 29–32, February, 2007. 相似文献
2.
O. A. Bannykh E. P. Pestryakova A. G. Rakhshtadt L. V. Barseg'yan V. M. Blinov 《Metal Science and Heat Treatment》1991,33(1):50-52
| 1. | It is established that the level of carbide and nitride phase dissolution in chromium-manganese steels of type Kh16G18 with a varible ratio of carbon and nitrogen in them reaches a maximum at 1150°C. With an almost identical lattice spacing the degree of its distortion in steel with nitrogen is greater and therefore the specific electrical resistivity of the steel is higher. |
| 2. | The degree of strain hardening for austenitic steel type Kh16G18 containing carbon and nitrogen depends on the relationship between these elements, and as a rule it is greater, the higher the nitrogen content, which is connected with the higher structural defect density and formation of -martensite in steel with nitrogen. |
| 3. | In chromium-manganese steel type Kh16G18 with the maximum nitrogen content (0.45%) after cold plastic deformation with tru = 1.2 a higher level of strengthening was achieved with retention of its nonmagnetic nature than for steel with 0.45% C. |
3.
V. M. Blinov A. V. Elistratov A. G. Kolesnikov A. G. Rakhshtadt A. I. Plokhikh E. I. Morozova M. V. Kostina 《Metal Science and Heat Treatment》2000,42(6):221-225
Conclusions
Translated from Metallovedenie i Termicheskaya Obrabotka metallov, No. 6, pp. 19–24, June, 2000. 相似文献
| 1. | We established the dependences of the phase composition of high-chromium (18% Cr) steels on the content of nitrogen. As the nitrogen content increases from 0.4 to 1.2% the proportion of untransformed austenite increases and that of martensite decreases respectively. This changes the structural class of the steels from martensitic (at 0.4% N) to austenitic (at 1.2%). |
| 2. | In heating of a quenched steel with 18% Cr and 0.4–1.2% N we determined two temperature ranges of structural transformations that correspond to the segregation of chromium nitrides from the initial martensite (A s−A f) and from austenite (B s−B f). |
| 3. | With the growth in the chromium concentration from 15 to 24% at 1–1.3% N quenching yields a stable austenite structure preserved even after tempering at 700°C. After heating the quenched steel to a temperature corresponding to the pointB f, the segregation of nitrides from the austenite causes the formation of martensite upon cooling and hence the growth in hardness. |
| 4. | Tempering of steels with an initial structure of martensite or austenite + martensite is accompanied with growth in the hardness due to dispersion hardening of martensite. The hardening is maximum (650–690HV) at a tempering temperature of 500–600°C. The highest level of hardening (649HV) has been observed in steel Kh18A4 quenched from 1200°C and tempered at 600°C. |
4.
Austenitic dispersion-hardening alloy 36NKhTYuM8 is well known as a nonmagnetic corrosion-resistant and heat-resistant spring material having quite good technological ductility (after quenching) and a high yield strength after aging (0
002 = 930 – 950 N/mm2). It is used for the production of complicated and critical elastic members. There are data on the possibility of a certain improvement in the adaptability to manufacture and the operating properties of the alloy. The present work concerns the possibility of rapid quenching with the use of electric-contact heating for alloy 36NKhTYuM8.Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 5, pp. 2 – 7, May, 1996. 相似文献
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