Acta Metallurgica Sinica (English Letters) ›› 2020, Vol. 33 ›› Issue (7): 991-1000.DOI: 10.1007/s40195-020-01035-x
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Hou-Long Liu1, Ling-Ling Liu1, Ming-Yu Ma1, Li-Qing Chen1()
Received:
2019-12-06
Revised:
2020-01-09
Online:
2020-07-10
Published:
2020-07-10
Contact:
Li-Qing Chen
Hou-Long Liu, Ling-Ling Liu, Ming-Yu Ma, Li-Qing Chen. Influence of Finish Rolling Temperature on Microstructure and Mechanical Properties of a 19Cr1.5Mo0.5 W Ferritic Stainless Steel[J]. Acta Metallurgica Sinica (English Letters), 2020, 33(7): 991-1000.
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C | Si | Mn | Cr | Nb | Ti | N | Mo | W | Ce |
---|---|---|---|---|---|---|---|---|---|
< 0.01 | 0.44 | 0.34 | 19.6 | 0.47 | 0.14 | < 0.009 | 1.55 | 0.45 | 0.05 |
Table 1 Chemical composition of the experimental steel (wt%)
C | Si | Mn | Cr | Nb | Ti | N | Mo | W | Ce |
---|---|---|---|---|---|---|---|---|---|
< 0.01 | 0.44 | 0.34 | 19.6 | 0.47 | 0.14 | < 0.009 | 1.55 | 0.45 | 0.05 |
Fig. 2 Optical micrographs for microstructures in the hot-rolled sheet a and annealed sheet c with finish rolling temperature of 860 °C and the hot-rolled sheet b, annealed sheet d with finish rolling temperature of 770 °C
Fig. 3 Optical micrographs for the cold-rolled sheet a and annealed sheet c with a finish rolling temperature of 860 °C and the cold-rolled sheet b, annealed sheet d with a finish rolling temperature of 770 °C
Fig. 4 Constant φ2 = 45° ODF sections for the hot-rolled sheet a and annealed sheet c with finish rolling temperature of 860 °C and the hot-rolled sheet b, annealed sheet d with finish rolling temperature of 770 °C
Fig. 5 Constant φ2 = 45° ODF sections for cold-rolled sheet a and annealed sheet c with a finish rolling temperature of 860 °C and the cold-rolled sheet b, annealed sheet d with a finish rolling temperature of 770 °C
Finish rolling temperature (°C) | Yield strength (MPa) | Tensile strength (MPa) | Elongation (%) | Yield strength ratio |
---|---|---|---|---|
860 | 354 | 527 | 32.1 | 0.67 |
770 | 367 | 542 | 32 | 0.68 |
Table 2 Mechanical properties for cold-rolled and annealed sheets under two hot rolling conditions
Finish rolling temperature (°C) | Yield strength (MPa) | Tensile strength (MPa) | Elongation (%) | Yield strength ratio |
---|---|---|---|---|
860 | 354 | 527 | 32.1 | 0.67 |
770 | 367 | 542 | 32 | 0.68 |
Finish rolling temperature (°C) | r0 | r45 | r90 | rm | Δr | n | Ra (μm) | Rt (μm) |
---|---|---|---|---|---|---|---|---|
860 | 1.64 | 0.95 | 1.36 | 1.36 | 0.82 | 0.21 | 0.538 | 4.138 |
770 | 1.84 | 1.36 | 1.51 | 1.52 | 0.32 | 0.21 | 0.352 | 2.673 |
Table 3 Formability of the final sheets with two hot rolling processes
Finish rolling temperature (°C) | r0 | r45 | r90 | rm | Δr | n | Ra (μm) | Rt (μm) |
---|---|---|---|---|---|---|---|---|
860 | 1.64 | 0.95 | 1.36 | 1.36 | 0.82 | 0.21 | 0.538 | 4.138 |
770 | 1.84 | 1.36 | 1.51 | 1.52 | 0.32 | 0.21 | 0.352 | 2.673 |
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