Acta Metallurgica Sinica (English Letters) ›› 2014, Vol. 27 ›› Issue (3): 407-415.DOI: 10.1007/s40195-014-0070-2
• research-article • Previous Articles Next Articles
Li Ma1,2, Jian Han3, Junqi Shen1(), Shengsun Hu1
Received:
2014-03-21
Revised:
2014-04-24
Online:
2014-06-25
Published:
2014-07-18
Li Ma, Jian Han, Junqi Shen, Shengsun Hu. Effects of Microalloying and Heat-Treatment Temperature on the Toughness of 26Cr–3.5Mo Super Ferritic Stainless Steels[J]. Acta Metallurgica Sinica (English Letters), 2014, 27(3): 407-415.
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Steel | C | Si | Mn | Cr | Ni | Mo | Nb | Ti | N | Fe |
---|---|---|---|---|---|---|---|---|---|---|
No. 1 | 0.010 | 0.25 | 0.27 | 25.4 | 2.03 | 3.39 | 0.34 | 0.20 | 0.010 | Bal. |
No. 2 | 0.007 | 0.33 | 0.28 | 25.7 | 3.87 | 3.57 | 0.35 | 0.17 | 0.008 | Bal. |
Table 1 Compositions of 26% Cr super ferritic stainless steels (wt%)
Steel | C | Si | Mn | Cr | Ni | Mo | Nb | Ti | N | Fe |
---|---|---|---|---|---|---|---|---|---|---|
No. 1 | 0.010 | 0.25 | 0.27 | 25.4 | 2.03 | 3.39 | 0.34 | 0.20 | 0.010 | Bal. |
No. 2 | 0.007 | 0.33 | 0.28 | 25.7 | 3.87 | 3.57 | 0.35 | 0.17 | 0.008 | Bal. |
Steel | YS (MPa) | UTS (MPa) | EL (%) | Hardness (HV) |
---|---|---|---|---|
No. 1 | 695 | 791 | 18.0 | 292 |
No. 2 | 684 | 765 | 18.0 | 287 |
Table 2 Mechanical properties of hot-rolled plate of No. 1 and No. 2 steels
Steel | YS (MPa) | UTS (MPa) | EL (%) | Hardness (HV) |
---|---|---|---|---|
No. 1 | 695 | 791 | 18.0 | 292 |
No. 2 | 684 | 765 | 18.0 | 287 |
Fig. 2 Mechanical properties of hot-rolled No. 1 and No. 2 steels after annealed at various annealing temperature: a yield strength; b tensile strength; c elongation; d hardness
Fig. 3 Charpy impact values of No. 1 and No. 2 steels: a room temperature impact toughness of No. 1 and No. 2 variation with annealing temperatures; b impact toughness of No. 1 and No. 2 steels after annealed at 1,060 °C variation with test temperature
Fig. 4 Overall fracture appearances and SEM fractographs of No.1 steel after impacted at 40 °C and -40 °C: a overall fracture appearances at 40 °C; b SEM fractographs at 40 °C; c overall fracture appearances at -40 °C; d SEM fractographs at -40 °C
Fig. 5 Overall fracture appearances and SEM fractographs of No. 2 steel after impacted at 40 °C and -40 °C: a overall fracture appearances at 40 °C; b SEM fractographs at 40 °C; c overall fracture appearances at -40 °C; d SEM fractographs at -40 °C
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