借助高温激光共聚焦显微镜,在线观察了不同Mn含量下无取向硅钢试样中的夹杂物析出、变化情况.结果表明,Mn含量为0.77％、0.32％时,对应试样的夹杂物数量分别为1 000万个/mm3、1 600万个/rmm3.其中,0.77％ Mn含量试样,夹杂物在1 115～1 098℃、1 068～1 032℃析出;0.32％ Mn含量试样,夹杂物在1 086～1 068℃析出.0.77％ Mn含量试样,优先析出球形、椭球形MnS夹杂,其析出夹杂数量较少,尺寸较大,能有效抑制AlN、CuxS夹杂析出;0.32％ Mn含量试样,优先析出相当数量MnS夹杂,并作为AlN夹杂析出核心,形成MnS+AlN复合夹杂.这种复合夹杂物数量较多,尺寸也较大.
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