To understand the solidification behavior of austenitic stainless steel in rotary electromagnetic-field, the influence of low-frequency rotary electromagnetic-field on solidification structure of austenitic stainless ...To understand the solidification behavior of austenitic stainless steel in rotary electromagnetic-field, the influence of low-frequency rotary electromagnetic-field on solidification structure of austenitic stainless steel in horizontal continuous casting was investigated based on industrial experiments. The results show that the solidification structure of austenitic stainless steel can be remarkably refined, the central porosity and shrinkage cavity can be remarkably decreased, and the equiaxed grains zone are enlarged by means of application of appropriate low-frequency electromagnetic-field parameters. The industrial trials verify that the stirring intensity of austenitic stainless steel should be higher compared with that of plain carbon steel. Electromagnetic stirring affects the macrostructure even if the average magnetic flux density of the electromagnetic stirring reaches 90 mT (amplitude reaches 141 mT) with the frequency of 3-4 Hz. Due to a higher viscosity, rotating speed of molten stainless steel is 20%-30% lower than that of molten carbon steel in the same magnetic flux density.展开更多
By the study of electromagnetic shielding principle,we have designed some new style fabrics for anti-electromagnetic radiation through the research of raw materials and fabric texture,and solved the key technical prob...By the study of electromagnetic shielding principle,we have designed some new style fabrics for anti-electromagnetic radiation through the research of raw materials and fabric texture,and solved the key technical problems such as the manufacture of composite yarn which composed of stainless steel filament and cotton yarn.As a newly developed high technology material,the new style anti-electromagnetic radiation fabric was woven by the special yarn composed of stainless filament and nature fiber.The new fabric overcomes the defect in the production and service of the shielding fabrics at present and satisfies the people's requirement the routine job and life.With further improvement,it can be widely used in aviation,navigation and military project,underground project and so on.展开更多
基金Project(CSTC2007BB4216) supported by the Natural Science Foundation of Chongqing,China
文摘To understand the solidification behavior of austenitic stainless steel in rotary electromagnetic-field, the influence of low-frequency rotary electromagnetic-field on solidification structure of austenitic stainless steel in horizontal continuous casting was investigated based on industrial experiments. The results show that the solidification structure of austenitic stainless steel can be remarkably refined, the central porosity and shrinkage cavity can be remarkably decreased, and the equiaxed grains zone are enlarged by means of application of appropriate low-frequency electromagnetic-field parameters. The industrial trials verify that the stirring intensity of austenitic stainless steel should be higher compared with that of plain carbon steel. Electromagnetic stirring affects the macrostructure even if the average magnetic flux density of the electromagnetic stirring reaches 90 mT (amplitude reaches 141 mT) with the frequency of 3-4 Hz. Due to a higher viscosity, rotating speed of molten stainless steel is 20%-30% lower than that of molten carbon steel in the same magnetic flux density.
文摘By the study of electromagnetic shielding principle,we have designed some new style fabrics for anti-electromagnetic radiation through the research of raw materials and fabric texture,and solved the key technical problems such as the manufacture of composite yarn which composed of stainless steel filament and cotton yarn.As a newly developed high technology material,the new style anti-electromagnetic radiation fabric was woven by the special yarn composed of stainless filament and nature fiber.The new fabric overcomes the defect in the production and service of the shielding fabrics at present and satisfies the people's requirement the routine job and life.With further improvement,it can be widely used in aviation,navigation and military project,underground project and so on.
