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钢中氢是导致白点和发裂的主要原因。管线钢中的氢含量越高,HIC产生的几率越大,腐蚀率越高,平均裂纹长度增加越显著。利用转炉CO气泡沸腾脱氢和炉外精炼脱气过程可很好地控制钢中的氢含量。采用RH、DH或吹氢搅拌等均可控制W[H]≤0.00015%。鹿岛制铁所使用RH脱氢处理,氩气流量为3.0m3/min时,成品中W[H]为0.00011%左右。另外,要防止炼钢的其他阶段增氢。采用钢包和中间包预热烘烤可以有效降低钢水的吸氢量。连铸过程中,在钢包和中间包系统中对保护
Hydrogen in steel is the main cause of white spots and cracking. The higher the hydrogen content in pipeline steel, the higher the probability of HIC generation and the higher the corrosion rate, the more significant the increase of average crack length. The use of converter CO bubble boiling dehydrogenation and furnace refining degassing process can be well controlled hydrogen content in steel. Using RH, DH or hydrogen mixing can be controlled, such as blowing W [H] ≤ 0.00015%. KK made use of RH dehydrogenation process, the argon flow rate of 3.0m3 / min, the finished product W [H] is about 0.00011%. In addition, to prevent the other stages of steelmaking hydrogen. The use of ladle and tundish preheat baking can effectively reduce the hydrogen absorption of molten steel. Continuous casting process, protection in ladle and tundish systems