采用定量金相和能谱仪等手段,研究了镁处理和镁钙复合处理对38MNS6非调质钢中硫化物的形态、尺寸和分布的影响.结果表明:变质处理使铸态硫化物由Ⅱ类向Ⅲ类和Ⅰ类转变,改善了硫化物的分布,但尺寸有所增大.热变形时硫化物的变形度,随硫化物中变质元素含量的降低或硫化物尺寸的增加而增加.镁钙复合处理改善硫化物分布的效果较好.
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