通过实验室真空感应炉试验,研究了超低氧条件下钢中复合非金属夹杂物的形成.研究发现:在含有一定硫的超低氧钢中高熔点氧化物夹杂很少,大部分为MnS.钢中Al2O3的尺寸较MgO-Al2O3系夹杂要大.以高熔点夹杂物为异质形核核心析出的MnS能显著提高钢材的疲劳寿命,此种复合夹杂物的形成与钢液成分、高熔点夹杂物的尺寸有关.
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