Q345R容器板脱氧工艺如果控制脱氧剂种类和加入量（主要是Mn）使钢中残留一定的氧，当加入足够数量的强氧化剂（Si，Al）使钢水脱氧良好，在凝固过程中形成ＣＯ气泡逸出而产生沸腾现象，在钢水凝固时不产生ＣＯ气泡，钢水保持平静叫镇静钢。压力容器用钢是镇静钢，这类钢叫沸腾钢。炼钢炉只能作为初炼，精炼需要在炉外精炼装备中完成。

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.

炉外精炼又叫二次精炼，主要是通过脱碳、脱硫、脱氮、脱磷，提高钢的清洁度，建立起具有抗氧化性能好，高温强度高的铬钼低合金钢，除去钢中不需要的有害杂质，提高钢材内质量等的技术。最高允许工作温度一般在475度以下，满足不了高温工况的需要，铬钼钢是压力容器常用钢种之一。

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.

它广泛用于炼油，化工各类加氢装置和重整装置中的临氢设备上，为此在普通碳素钢的基础上，添加Cr、Mo、V等合金元素，具有优异的抗氢腐蚀性能和良好的高温强度，是高温高压容器壳体和封头的首选材料。

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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