Hot Ductility Behavior of 9SiCr Alloy Tool Steel by Thin Slab Casting

In order to evaluate the feasibility of 9SiCr alloy tool steel produced by thin slab casting, the high temperature mechanical properties of 9SiCr alloy tool steel were investigated by Gleeb-1500 thermal simulator. The morphologies of the tensile fracture at different temperatures were observed by scanning electron microscope (SEM), together with analysis of fracture mechanisms in different regions. The results showed that there were two brittle zones in the temperature range from 600 °C to 1200 °C. A melting fracture was characterized in the high temperature brittle zone of above 1170 °C, whereas a typical cleavage fracture was exhibited in the low temperature brittle zone from 820 °C to 600 °C, Meanwhile, a good hot ductility behavior characterized by typical dimple fracture was demonstrate at the temperature range from 1170 °C to 820 °C.Thus, the 9SiCr alloy tool steel with the final gauge of 1.5mm was produced by CSP, based on the optimal process parameters.

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Precipitation and hot ductility of low C-V and low C-V-Nb microalloyed steels during thin slab casting

Materials Science and Technology ◽

10.1179/026708301101509665 ◽

2001 ◽

Vol 17 (12) ◽

pp. 1596-1604 ◽

Cited By ~ 18

Author(s):

K. Banks ◽

A. Koursaris ◽

F. Verdoorn ◽

A. Tuling

Keyword(s):

Microalloyed Steels ◽

Hot Ductility ◽

Thin Slab ◽

Thin Slab Casting ◽

Slab Casting

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Primary Recrystallization Behaviors of Hi-B Steel with Lower Initial Nitrogen Produced by the Thin Slab Casting and Rolling Process

Metals ◽

10.3390/met11020189 ◽

2021 ◽

Vol 11 (2) ◽

pp. 189

Author(s):

Bing Fu ◽

Li Xiang ◽

Jia-Long Qiao ◽

Hai-Jun Wang ◽

Jing Liu ◽

...

Keyword(s):

Grain Size ◽

Electron Microscope ◽

Nitrogen Content ◽

Rolling Process ◽

Primary Recrystallization ◽

Thin Slab ◽

Nitriding Temperature ◽

Thin Slab Casting ◽

Slab Casting ◽

Inhomogeneity Factor

Based on low-temperature high-permeability grain-oriented silicon steel designed with an initial nitrogen content of 0.0055% and produced by the thin slab casting and rolling process, the effect of total nitrogen content and nitriding temperature on primary recrystallization microstructure and texture were studied by optical microscope, scanning electron microscope, transmission electron microscope, and electron backscatter diffraction. The nitriding temperature affects the primary recrystallization behaviors significantly, while the total nitrogen content has a small effect. As the nitriding temperature is 750–850 °C, the average primary grain size and its inhomogeneity factor are about 26.58–26.67 μm and 0.568–0.572, respectively. Moreover, the texture factor is mostly between 0.15 and 0.40. Because of the relatively sufficient inhibition ability of inherent inhibitors in a decarburized sheet, the nitriding temperature (750–850 °C) affects the primary recrystallization microstructure and texture slightly. However, as the nitriding temperature rises to 900–950 °C, the average primary grain size and its inhomogeneity factor increase to 27.75–28.26 μm and 0.575–0.578, respectively. Furthermore, because of the great increase on the area fraction of {112} <110> grains, part of texture factor is increased sharply. Therefore, in order to obtain better primary grain size and homogeneity, better texture composition, and stability of the decarburized sheet, the optimal nitriding temperature is 750–850 °C.

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