论文部分内容阅读
脱氧的目的分两方面:1.使钢变成镇静钢,没有气泡;2.使钢中非金属夹杂物数量减少;最后,使钢的质量达到最后使用的要求。脱氧是很重要的问题,脱氧不良,钢的质量会受很大的影响。很久以前,会生产下列成分的钢:C Mn Si Cu Cr0.12— 0.80— 0.60— 0.40— 0.40—0.22 1.10 1.00 0.60 0.60炉内用锰铁脱氧,包内用矽铁和铝脱氧;这种脱氧方法炼得的钢的冲击值总不能满足要求。以后在脱氧问题上着手改变,炉内用矽锰铝合金、接着用锰铁,往包内加45%矽铁和铝(0.7公斤/吨钢);钢质量有显著提高,就没有因冲击值不合而报发现象。上述二个方法的加铝量总数是一致的,但由于加入方法不同而影响很大。脱氧方法应根据钢的用途不同而不一致。如生产3钢,其化学成分是 C 0.14—0.22%,Mn 0.35—0.55%;使用地点不同,脱氧亦不一致。如用于火车头火箱和北方寒带,则采取的脱氧方法也不一样;用于火箱者,要求铝的加入量少些,用于北方,则应多
The purpose of deoxidation is divided into two aspects: 1. Make the steel into a killed steel without bubbles; 2. Reduce the amount of non-metallic inclusions in the steel; finally, make the quality of the steel meet the requirements of the final use. Deoxidation is a very important issue, de-oxygen bad, the quality of steel will be greatly affected. Long ago, steel of the following composition was produced: C Mn Si Cu Cr 0.12 - 0.80 - 0.60 - 0.40 - 0.40 - 0.22 1.10 1.00 0.60 0.60 The furnace was deoxidized with ferromanganese, which was deoxygenated with ferrosilicon and aluminum; this deoxidation Method of refining the value of the steel can not meet the requirements. Later on the issue of deoxidation to start changing furnace with Si-Mn alloy, followed by ferromanganese, 45% plus ferrosilicon and aluminum package (0.7 kg / ton of steel); significant increase in steel quality, there is no impact value Submission of the phenomenon. The total amount of aluminum in the above two methods is the same, but it is greatly influenced by the joining method. Deoxidation method should be based on the use of different steel inconsistencies. Such as the production of 3 steel, the chemical composition of C 0.14-0.22%, Mn 0.35-0.55%; use different locations, deoxy also inconsistent. Such as for the locomotive firebox and the northern cold zone, the deoxidation method is not the same; for firebox, require less aluminum, for the north, should be more