CAJ | 학술논문

借助高温激光共聚焦显微镜，在线观察了不同Mn含量的无取向硅钢中夹杂物的尺寸、类型、数量变化。结果表明，Mn含量(质量分数)为0.77%、0.32%时，试样中的夹杂物数量分别约为1000万个/mm3、1600万个/mm3。Mn含量较高的钢种，会优先析出球形、椭球形MnS夹杂物，其析出数量较少，尺寸相对较大，可以有效抑制AlN、CuxS夹杂物析出；Mn含量较低的钢种，会在试样再加热后冷却过程中，先析出相当数量MnS夹杂物，并作为AlN夹杂物析出核心，形成MnS+AlN复合夹杂物。这种复合夹杂物数量较多，尺寸也较大。
차조고온격광공취초현미경，재선관찰료불동Mn함량적무취향규강중협잡물적척촌、류형、수량변화。결과표명，Mn함량(질량분수)위0.77%、0.32%시，시양중적협잡물수량분별약위1000만개/mm3、1600만개/mm3。Mn함량교고적강충，회우선석출구형、타구형MnS협잡물，기석출수량교소，척촌상대교대，가이유효억제AlN、CuxS협잡물석출；Mn함량교저적강충，회재시양재가열후냉각과정중，선석출상당수량MnS협잡물，병작위AlN협잡물석출핵심，형성MnS+AlN복합협잡물。저충복합협잡물수량교다，척촌야교대。
Based on the high temperature confocal microscope, the chage of size, type, and quanti-ty of inclusions in non-oriented silicon steels with different Mn content were observed by in-situ SEM. Results show that the inclusion quantities are 10 million per mm3 and 16 million per mm3, while the mass fractions of Mn are 0.77% and 0.32%, respectively. In the silicon steel with higher Mn content, the spherical and ellipsoidal MnS inclusion will precipitate first, which can retard the precipitation of AlN and CuxS effectively. The quantity of the inclusion is smaller, while the size is larger. On the other hand, in the silicon steel with lower Mn content, the MnS inclusion will precipitate first, which can be adopted as the core of AlN inclusion to form the complex inclusion, MnS and AlN, during the reheating and cooling process. Both the quantity and the size of the complex inclusion are larger.