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Q345R容器板脫氧工藝如果控制脫氧劑種類和加入量（主要是Mn）使鋼中殘留一定的氧，當加入足夠數量的強氧化劑（Si，Al）使鋼水脫氧良好，在凝固過程中形成ＣＯ氣泡逸出而產生沸騰現象，在鋼水凝固時不產生ＣＯ氣泡，鋼水保持平靜叫鎮靜鋼。壓力容器用鋼是鎮靜鋼，這類鋼叫沸騰鋼。煉鋼爐只能作為初煉，精煉需要在爐外精煉裝備中完成。
The Q345R container plate deoxidation process if the control deoxidizing agent type and dosage (Mn) to make certain oxygen residues in steel, when a strong oxidizing agent to a sufficient number of (Si, Al) the deoxidation of molten steel is good, CO bubble formation during solidification and boiling phenomenon in steel when water freezes does not produce CO bubble, calm call steel killed steel. Steel for pressure vessels is composed of steel, which is called boiling steel. The steelmaking furnace can only be used as a primary refining, refining the need to complete the furnace refining equipment.
爐外精煉又叫二次精煉，主要是通過脫碳、脫硫、脫氮、脫磷，提高鋼的清潔度，建立起具有抗氧化性能好，高溫強度高的鉻鉬低合金鋼，除去鋼中不需要的有害雜質，提高鋼材內質量等的技術。最高允許工作溫度一般在475度以下，滿足不了高溫工況的需要，鉻鉬鋼是壓力容器常用鋼種之一。
Also called the two refining refining, mainly through decarburization, desulfurization, denitrification and dephosphorization, and improve steel cleanliness, establish a good oxidation resistance, high temperature strength and low chromium molybdenum alloy steel, do not need to remove harmful impurities in steel, improve the quality of technology in steel. Maximum allowable working temperature is below 475 degrees, can not meet the needs of high temperature conditions, chrome molybdenum steel is one of the commonly used steel pressure vessel.
它廣泛用于煉油，化工各類加氫裝置和重整裝置中的臨氫設備上，為此在普通碳素鋼的基礎上，添加Cr、Mo、V等合金元素，具有優異的抗氫腐蝕性能和良好的高溫強度，是高溫高壓容器殼體和封頭的首選材料。
It is widely used in oil refining equipment, hydrogen chemical hydrogenation unit and reforming unit on, based on ordinary carbon steel, adding Cr, Mo, V and other alloy elements, has excellent performance of anti hydrogen corrosion and high temperature strength, is the preferred material for high temperature and high pressure vessel shell and head.
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