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I. M. Fedorchenko Yu. F. Shevchuk V. N. Miroshnikov V. A. Borisenko 《Powder Metallurgy and Metal Ceramics》1976,15(3):238-242
| 1. | It has been established that the alloying of sintered Fe-CaF2 materials with molybdenum (15 wt.%) increases their hardness 2.5–8.6 times and raises their transverse rupture strength to 70–60 kg/mm2 and their compressive strength to 110–70 kg/mm2 at temperatures of up to 650°C.0 |
| 2. | Raising the CaF2 content of sintered iron decreases its impact strength at temperatures of up to 650°C. It was found that for Fe6CaF2, Fe9CaF2, and Fe (porous) materials the variation of impact strength as a function of testing temperature is similar in character to that observed with cast Armco iron. The blue-brittleness range for sintered Fe-CaF2 materials extends from 350 to 450°C. |
| 3. | It is shown that the impact strength of sintered Fe15Mo6CaF2 material, unlike that of unalloyed materials, increases up to a temperature of 500°C as a result of migration of the molybdenum from the grain boundaries into the grains. In tests Fe15Mo6CaF2 material cracks by a brittle intergranular rupture mechanism. |
| 4. | Fe15Mo6CaF2 material surpasses in heat resistance all the other sintered CaF2-containing ironbase materials investigated, and can therefore be recommended for operation at temperatures of up to 650°C in friction units which do not experience severe shock loads. |
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Mel'nikov V. G. Yudina T. F. Aleshonkova E. A. 《Powder Metallurgy and Metal Ceramics》1978,17(3):249-251
Powder Metallurgy and Metal Ceramics - 相似文献
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S. A. Firstov I. I. Ivanova A. N. Demidik G. F. Sarzhan Yu. N. Podrezov M. E. Golovkova 《Powder Metallurgy and Metal Ceramics》1989,28(6):480-486
Translated from Poroshkovaya Metallurgiya, No. 6(318), pp. 70–77, June, 1989. 相似文献
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