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Solidification Structure, Non-metallic Inclusions and Hot Ductility of Continuously Cast High Manganese TWIP Steel Slab

机译:连续铸造高锰双钢板的凝固结构,非金属夹杂物和热延展性

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摘要

In the current study, the solidification structure, non-metallic inclusions and hot ductility of continuously cast high manganese TWIP steel slab have been investigated and the inclusion formation behavior have been revealed by FactSage (CRCT-ThermFact Inc., Montreal, Canada). The area ratio of equiaxed grain zone of the TWIP steel slab is 0.18. Two main types of inclusions in the TWIP steel slab are single AIN particle and AIN + MnS aggregates. It is found that MgAl_2O_4 and AIN particles can precipitate in the initial solidification stage, which can act as heterogeneous nuclei of other inclusions. In the high temperature tension test, the reduction of area (RA) of the TWIP steel slab samples are higher than 40 pct in the temperature range from 873 K to 1 473 K (600°C to 1 200°C). Brittle fractures are observed in the fracture surface of the TWIP steel slab samples with dimples. Contents of manganese, carbon, sulfur and phosphorus, strain rate, and dynamic recrystallization (DRX) are factors influencing the hot ductility of TWIP steel slab.
机译:在目前的研究中,已经研究了凝固结构,连续铸造的高锰双钢板的非金属夹杂物和热延展性,并且通过事件(CRCT-Thermfver Inc.,Montreal,Canada)揭示了包含的形成行为。 TWIP钢板的等轴谷物区的面积比为0.18。 Twip钢板中的两种主要类型的夹杂物是单一AIN颗粒和AIN + MNS聚集体。发现MgAl_2O_4和AIN颗粒可以在初始凝固阶段沉淀,其可以充当其他夹杂物的异质核。在高温张力试验中,在873k至1 473k(600℃至1200℃)的温度范围内,Twip钢板样品的区域(Ra)的降低高于40pct。在具有凹坑的Twip钢板样品的断裂表面中观察到脆性骨折。锰,碳,硫和磷,应变率和动态再结晶(DRX)的含量是影响TWIP钢板的热延展性的因素。

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