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氢是钢中有害杂质之一,它使钢材及其制品产生白点、裂纹等缺陷,有很大的危害。炼钢过程要尽量降低钢中氢的含量,但往往达不到要求,还需要采取炉外真空精炼方法。 自五十年代以来,炉外真空精炼方法已有DH、RH和VAD等,因其设备、工艺复杂,精炼时间长等缺陷,在生产上不易推广。 喷射冶金可使反应面积增大、速度加快,且设备简单,对于钢水脱硫、脱氧及改变夹杂物形态等颇有成效。但目前最主要的副作用是增加钢中氢的含量,经喷粉精炼后,钢中增氢高达2～3倍,这是发展喷射冶金的重要障碍。
Hydrogen is one of the harmful impurities in steel, which makes the steel and its products produce defects such as white spots and cracks, which is very harmful. Steelmaking process to minimize the hydrogen content of steel, but often can not meet the requirements, but also need to take outside the vacuum refining method. Since the 1950s, there have been DH, RH and VAD vacuum refining methods outside the furnace, because of its equipment, complex processes, such as refining a long time defects, not easy to promote in the production. Jet metallurgy can increase the reaction area, speed, and equipment is simple, for molten steel desulfurization, deoxidation and change inclusions quite effective. However, the most important side effect is to increase the hydrogen content in the steel. After the powder is refined, the hydrogen in the steel is up to 2 ~ 3 times, which is an important obstacle to the development of metallurgy.