1,Boiling steel plates and composed plate Articles boiling steel plates Boiling steel plate is made of ordinary carbon structural steel pipe rimmed steel hot rolled steel plate. Rimmed steel is a steel deoxidized incomplete, only use a certain amount of weak deoxidizer of steel fluid deaeration, liquid steel oxygen content is higher, after the steel ingot mould injection, carbon and oxygen reaction produces a large amount of gas, liquid steel caused by boiling, rimmed steel hence the name. Rimmed steel carbon content is low, because of no silicon deoxidation, silicon content in steel is low (Si < 0.07%). Rimmed steel outer in boiling liquid steel caused by vigorous agitation under the conditions of crystallization, so the surface of pure, dense, good surface quality, has good plasticity and stamping performance, no big shrinkage cavity, less cutting head, high yield, and the steel production process is simple, less consumption of ferroalloy, steel cost is low. Boiling steel plate used in the manufacture of various kinds of stamping parts, architecture and engineering structure and some of the less important parts of machine structure. But rimming steel heart of impurity is more, segregation more serious, the organization is not dense, uneven mechanical properties. At the same time because the gas content in steel is more, so the toughness is low, ductile-brittle and aging sensitivity is larger, the welding performance is poor. So the boiling steel is not suitable for manufacturing work under impact load, under the condition of low temperature of welded structure and other important structures. 2, composed plate Calm steel plate is made of ordinary carbon structural steel killed steel hot rolled steel plates. Killed steel is deoxidized steel, steel liquid before pouring with sufficient ferromanganese, ferrosilicon and aluminium deoxidation, liquid steel oxygen content is low (0.002-0.003%), the liquid steel in the ingot mould is calm, do not produce the boiling phenomenon, killed steel. Under normal operating conditions, no air bubbles in the killed steel, uniform organization; Because of the low oxygen levels, oxide inclusions in steel is less, high purity, ductile-brittle and aging tend to be small; At the same time, killed steel segregation is small, uniform performance comparison, quality is higher. Killed steel disadvantage is that the concentration of shrinkage cavity, yield is low, the price is higher. Therefore, composed of steel is mainly used in low temperature under impact of artifacts, and other components requiring high strength of welded structure. Low alloy steel plate is composed of steel and half killed steel plate. Because of the high strength, superior performance, can save a large amount steel doors of steel, reduce the structure weight, its application has more and more widely. Hunan Great Steel Pipe Co.,ltd is your best choice for steel plates and carbon steel pipe.
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