鉄材と溶融アルミニウムの反応に及ぼすBeの影響

概要

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To study the effect of beryllium on the reaction between solid iron alloys and liquid aluminum, specimens of three kinds of carbon steels, cast iron and Fe-0.43% Be alloy were immersed in molten baths of pure aluminum, Al-0.035% Be and Al-0.24% Be alloys at 770°C for 0.5∼128h. The thickness, composition and hardness of the reaction zone formed on the iron surfaces and the weight loss of the specimens due to corrosion by liquid aluminum were measured.Neither the weight loss of the iron specimens during the reaction nor the crystal structure in the reaction zone was significantly influenced by beryllium in the liquid aluminum or solid iron, but the thickness of the reaction zone decreased greatly with increasing beryllium content for immersion periods less than 8h.It was concluded that the presence of beryllium had no effect on the rate of formation of the Fe2Al5 alloy layer on the iron surface, but accelerated the rate of dissolution of the alloy layer into the liquid aluminum.
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