The behavior of dual-phase (MnO-SiO2-Al2O3) + (SiO2) inclusions in saw wire steels during hot rolling and cold drawing was investigated in detail. It was found that the inclusion matrix (glassy MnO-SiO2-Al2O3 (silicate)) manifested rheological properties and the precipitated SiO2 experienced poor deformation in hot rolling. After multi-pass hot rolling, these two phases gradually became separated from each other. The former was elongated into a thin strip, whereas the shape of the latter was deformed from spherical to ellipsoid. Despite their distinctive deformability during hot rolling, MnO-SiO2-Al2O3 and SiO2 were both crushed into smaller pieces during cold drawing. With the proceeding of drawing, shattered pieces became tiny and their interspaces were enlarged, thus causing a reduction in filament breakage. Based on these findings, inclusions were categorized by their melting points and Young’s moduli. Hence, the effects of inclusions on saw wires fabricated by hot rolling and cold drawing were more quantitatively evaluated, and the obtained results were found to be in good agreement with industrial findings.

中文翻译：

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双相 (MnO-SiO2-Al2O3) + (SiO2) 夹杂物在热轧和冷拔过程中锯线钢的行为

详细研究了热轧和冷拔过程中锯线钢中双相 (MnO-SiO2-Al2O3) + (SiO2) 夹杂物的行为。结果表明，夹杂物基体（玻璃状MnO-SiO2-Al2O3（硅酸盐））表现出流变特性，而析出的SiO2在热轧中变形较差。经过多道次热轧后，这两相逐渐分离。前者被拉长成细条状，而后者的形状则由球形变形为椭圆形。尽管在热轧过程中具有独特的变形能力，但 MnO-SiO2-Al2O3 和 SiO2 在冷拔过程中都被压碎成更小的碎片。随着拉丝的进行，破碎的碎片变得越来越小，它们的间隙变大，从而减少了断丝。基于这些发现，夹杂物按其熔点和杨氏模量分类。因此，更定量地评估夹杂物对热轧和冷拔制造的锯线的影响，发现所得结果与工业发现非常吻合。