PROBLEM TO BE SOLVED: To provide a stainless steel plate in which a composition of a non-metallic inclusion is controlled, and accordingly the occurrence of a flaw is suppressed.;SOLUTION: The stainless steel plate is provided that contains C:0.2% or less, Si:0.1 to 2%, Mn:0.1 to 2%, S:0.005% or less, Ni:7 to 20%, Cr:15 to 20%, Al:0.02 to 0.15%, N:0.1% or less, O:0.0001 to 0.005%, Mg:0.0001 to 0.005%, Ca:0.0001 to 0.005%, Mo:5% or less and Cu:2% or less, and the balance Fe with inevitable impurities. In the stainless steel plate, the non-metallic inclusion includes one or more of MgO, a CaO-Al2O3-based oxide and MgO Al2O3, the non-metallic inclusion that is dispersed and aligned in parallel with a rolling direction is continuously aligned to a length of 500 μm or more, and out of them, the non-metallic inclusion having such a form as to include at least one recess with a width of 5 μm or more, a depth of 1 μm or more and a length of 10 μm or more are 20 pieces or less per surface area of a steel plate surface 1 m2. A method for purifying the above stainless steel plate is also provided.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT
展开▼
机译：解决的问题：提供一种不锈钢板，其中控制了非金属夹杂物的成分，因此抑制了缺陷的发生。解决方案：提供的不锈钢板中含有C：0.2％或小于，Si：0.1至2％，Mn：0.1至2％，S：0.005％以下，Ni：7至20％，Cr：15至20％，Al：0.02至0.15％，N：0.1％以下O：0.0001〜0.005％，Mg：0.0001〜0.005％，Ca：0.0001〜0.005％，Mo：5％以下，Cu：2％以下，余量的Fe具有不可避免的杂质。在不锈钢板中，非金属夹杂物包括MgO，CaO-Al 2 O 3 基氧化物和MgO Al 2 < / Sub> O 3 ，与轧制方向平行排列并分散排列的非金属夹杂物连续排列至500μm以上的长度，并且其中的非金属夹杂物具有这样的形式的夹杂物，其包括至少一个宽度大于或等于5μm，深度大于或等于1μm，长度大于或等于10μm的凹部，在钢板表面1的每个表面积上为20个以下。 m 2 。还提供了一种纯化上述不锈钢板的方法。;部分附图：图1;版权：（C）2019，JPO＆INPIT
展开▼
