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零夹杂钢即夹杂物高度弥散分、尺寸小于1μm的钢。论文从理论上分析其制备的可能性,展望其性能。具体工艺措施为:经过预脱铝处理的超低S、P工业纯铁,在50kg真空感应炉中依靠碳氧脱氧反应进行初脱氧、深脱氧和合金化处理,炼成42CrMo钢,最后在电子束炉中经过两次重熔,得到全氧量为T.O.=4×10-6的42CrMo锭。精炼钢锻造成材后,非金属夹杂物非常细小用常规金相检验(×100倍)很难定量评级,在扫描电镜检测下发现有少量1～4μm的Al2O3夹杂,其主要来自铁合金原料。疲劳寿命由107转数提高到109转数。
Zero inclusions inclusions inclusions that is highly diffuse sub-size, size less than 1μm steel. Papers from the theoretical analysis of the possibility of its preparation, look forward to its performance. The specific process measures are as follows: the ultra-low S and P industrial pure iron after the pre-de-alumination treatment is subjected to primary deoxidation, deep deoxidation and alloying treatment in a 50kg vacuum induction furnace by means of a carbon and oxygen deoxidation reaction to form 42CrMo steel; finally, The beam furnace was remelted twice to obtain a 42CrMo ingot with an oxygen content of TO = 4x10-6. Non-metallic inclusions are very small after being refined by forging steel. It is difficult to quantitatively evaluate non-metallic inclusions by conventional metallographic examination (× 100 times). A small amount of 1 to 4 μm Al2O3 inclusions were found under the scanning electron microscopy, mainly from ferroalloy raw materials. Fatigue life increased from 107 rpm to 109 rpm.