To the research of products of iron line technology

To the research of products of iron line technology

Handicraft is made go up to undertake copper facing of normal temperature chemistry undertakes chromatic processing next first in iron, obtained the chromatic layer of effect satisfaction. The craft that discussed copper facing of normal temperature chemistry and chromatic processing is normative, introduced the influencing factor of chemical copper facing simply. This are chromatic technological equipment is simple, the operation is handy, cost is inferior.

The Fe-Si3N4 that shows preparation of fast combustion law for thorough knowledge regards high temperature as the good character of new-style raw material in the domain, the Fe-Si3N4 raw material that is less than 74 μ M with granuality makes the sample of 80mm of φ 50mm × , shape pressure is 250kN, fall via condition of air of 3h of 1500 ℃ constant temperature firing hind, cylinder of 50mm of × of 36min extraction φ is gotten to undertake the index such as density of porosity, bulk and intensity of normal temperature compression detects in sample interior, combine XRD, SEM, EDS and DTA-TG undertook an analysis. The result makes clear, with raw material of pure Fe-_ Si3N4, do not add any agglomeration auxiliary, the combinative action of the Fe3Si that solid solution of the iron in the Fe3Si that relies on raw material oneself and raw material changes silicon reaction to generate with nitrogen, microtherm falls in air condition firing preparation nitrogen changes ferrosilicon fireproof material is feasible.

Study the chemical principle of corrosion of metals, prevent corrosion of metals effectively to already became the major problem in scientific research and technical domain. Arranged the content with rustily ironwork, carry experimental make a thorough inquiry, with helix ascendant means goes forward one by one the method with the chemical essence of the condition that studied happening of corrosion of metals, corrosion of metals, anticorrosive metal. At present the experiment in teaching material still has the space of research, what if do not have experimental testimony,prove ironwork is rustily oxygen attends, because react,meet rate is slow and make experimental phenomenon not quite apparent, do not suit classroom to demonstrate to wait.

Organize the reason of generation to study protruding of the float in steely goods, take to 14 use metallographic to organize lens of report of appraisal, scanning from the different place, has float protruding organization sample that belongs to different period can chart analysis, chemical analysis and microscopical hardness determines waited for a method to undertake study. Does the result make clear: ? Juan of  of Jian Mi scull flags ⑾ shows whencing sex of  of ⊥ coffin scull swims Qiang swallows? of impossible of grave of ǖ of Xing Huan of Xie of wash of ＜ of Я of  dimple extensive region to exist have different form appearance, its are microscopical the sample phosphor content that the sample phosphor content that hardness all makes clear to protruding having surplus is organized than analysis of composition of around matrix tall; wants to be organized than doing not have float protruding is high quantitative class. Of content of phosphor of interior of specimen of tissue of protruding having surplus distributing inhomogenous also. These results explain, the generation that float protruding organizes is main the reason is the phosphor in ore in iron is entered in smelt process, and in subsequently decarbonization anneal, ; all cannot be shucked off effectively in frying refine and process of cold, hot-working at the same time, solid dissolve forms film to stop the group between grain in the phosphor in iron and iron grown, perhaps be in the crystal boundary that buries a condition to issue long-term effectiveness for a given period of time to cause moves and produced float protruding organization.

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