Mn/S对含硫非调质钢中硫化物形态的影响

Effect of Mn/S on sulfide inclusions in non-quenched and tempered steel containing sulfur

摘要: 通过实验室真空感应炉冶炼铸锭然后锻造成棒材的方法，研究了不同Mn/S（质量比）对含硫非调质钢中硫化物形态的影响.研究结果表明：提高Mn/S有利于改善铸态和棒材中硫化物的分布均匀性；随着Mn/S的提高，棒材中长宽比<3形态的硫化物由5%左右提高至25%以上，Mn/S提高有利于硫化物的球化或纺锤化控制；实验条件下，Mn/S应控制在40左右.

Abstract: The effect of Mn/S(mass ratio) on sulfide inclusions in non-quenched and tempered steel containing sulfur was studied by smelting with vacuum reduction furnace and forging in laboratory. It is found that the distributions of sulfides both in ingots and bars tend to be more dispersed with the increase of Mn/S; and it is beneficial to make the sulfides be globular or spindle with the increase of Mn/S because the percentage of sulfides whose length-width ratio is less than 3 is increased from about 5% to more than 25%. The recommended Mn/S ratio is about 40 under the experimental conditions.