Strip Casting of a High‐Manganese Steel (FeMn22C0.6) Compared with a Process Chain Consisting of Ingot Casting and Hot Forming

Abstract

In this paper, the capabilities of the thin strip (twin roller) casting method to produce high manganese steel strip are examined. For this purpose a FeMn22C0.6 strip has been cast both using a lab‐scale twin roll casting line and a more conventional process chain. The experiments show that the production of high manganese steel strip is feasible with both methods. Differences become apparent in the microstructure and chemical composition. While the strip which was produced by ingot casting and hot forming shows a homogenous grain distribution, the thin‐strip‐cast one shows a typical casting microstructure, consisting of dendritic and globulitic structures. In addition, the thin‐strip‐cast steel contains the accurate carbon content, while the hot forming route led to a loss of carbon, which influences the mechanical properties. The good potential of thin‐strip casting of high manganese steels, although it still has to be improved, is confirmed.

Exploiting Process-Related Advantages of Selective Laser Melting for the Production of High-Manganese Steel

“…Analysis of the Mn content along the line in the inset of Figure 6 a revealed that the Mn content varied by ±1.8 wt % ( Figure 6 c). Although the Mn variation in the SLM-produced steel was measured over a short distance and needs further verification, this value was lower compared to the Mn variation in as-cast HMnS produced by ingot [ 35 ] and strip casting [ 36 , 37 ], as shown in Figure 7 . Only the application of energy-intensive post processing allows the reduction of element segregation and the achievement of the Mn distribution detected in the SLM-processed steel.…”

Effect of Twinning on Microstructural Evolution During Dynamic Recrystallisation of Hot Deformed As-Cast Austenitic Stainless Steel

“…The first is the bulging of pre-existing boundaries characterized by migration of pre-existing high-angle grain boundaries. [2,3] The second is associated with the nucleation and growth of new grains whose large misorientations with respect to the deformed surrounding matrix originate from continuous subgrain rotation or discontinuous subgrain growth and coalescence processes near the grain boundaries. [4][5][6] Third, it is multiple (annealing) twinning: nuclei are basically subgrains, which create high mobility boundaries by repeated annealing twinning.…”

Thermophysical Properties and Solidification Defects of Fe-22Mn-0.7C TWIP Steel

“…However, the measured solidus of TWIP steels by DSC or DTA was much higher than the predicted . Besides, the solidification microstructure of TWIP steel was observed to be quite coarse with developed columnar dendrite and equiaxed grains, which were generally attributed from low thermal conductivity . The quantitative comparison on the heat transfer performance between TWIP steel and others has been rarely reported.…”

“…Ha et al and Wang et al experimentally investigated the solidification structure and dent defect of TWIP steel by twin strip casting . Daamen et al made comparisons on microstructure and mechanical property of Fe–22Mn–0.6C TWIP steel between strip casting and ingot casting . Although TWIP steel strips with a higher homogeneity and formability were successfully produced, conventional slabs casting was also under strong pull by the large compression ratio and low investment cost demand.…”