Transactions of Materials and Heat Treatment

Title：Influence of rolling deformation on sulfide in free-cutting steel containing sulfur

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ClassificationCode：TG335.3

year,vol(issue):pagenumber：2020,45(11):120-125

Abstract：

The influences of rolling deformation on the morphology, length-width ratio, size and number of manganese sulfide in the free-cutting steel containing sulfur were studied by OM, SEM, EDS and ASPEX SEM-EDS. The results show that the manganese sulfide in as-cast test steel nucleates and precipitates separately in the matrix, which is similar to globular and spindle shape with arbitrary distribution. In the test steel of Ф45 mm, the shape of manganese sulfide is approximately elliptical, and in the test steel of Ф16 mm, except for elliptical manganese sulfide, there is elongated manganese sulfide. However, in the test steel of Ф5.5 mm, the manganese sulfide is elongated, and the number of manganese sulfide decreases as it matures and grows up during the rolling process at 1200 ℃. In addition, as the size of test steel becomes thinner, the rolling deformation amount increases, the deformation of manganese sulfide increases and the length-width ratio increases. In the rolling process, manganese sulfide breaks, its size decreases and its number increases.

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王英虎（1992-），男，硕士，工程师 E-mail：hihihowareyou@163.com

Reference：

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