Acta Metallurgica Sinica (English Letters) ›› 2014, Vol. 27 ›› Issue (3): 534-538.DOI: 10.1007/s40195-014-0080-0
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Boling Zhu, Shanwu Yang(), Guangshan Yang, Guoliang Liu
Received:
2014-04-10
Revised:
2014-05-12
Online:
2014-06-25
Published:
2014-07-18
Boling Zhu, Shanwu Yang, Guangshan Yang, Guoliang Liu. Formation and Evolution of Microstructures in Fe–9%Cr Heat-Resistant Steel[J]. Acta Metallurgica Sinica (English Letters), 2014, 27(3): 534-538.
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Site | W (wt%) | V (wt%) | Ta (wt%) |
---|---|---|---|
Top | 1.46 | 0.20 | 0.12 |
Bottom | 1.46 | 0.20 | 0.12 |
Middle | 1.60 | 0.21 | 0.13 |
Table 1 Macroscopic distribution of alloy elements at different sites in the casting Fe–9%Cr steel
Site | W (wt%) | V (wt%) | Ta (wt%) |
---|---|---|---|
Top | 1.46 | 0.20 | 0.12 |
Bottom | 1.46 | 0.20 | 0.12 |
Middle | 1.60 | 0.21 | 0.13 |
Site | Hardness (HV) | Error range (HV) |
---|---|---|
A | 395.4 | 5.8 |
B | 392.8 | 3.2 |
C | 391 | 1.4 |
D | 389.9 | 0.3 |
E | 383.1 | -6.5 |
F | 389.2 | -0.4 |
G | 389.0 | -0.6 |
H | 390.2 | 0.6 |
I | 386.8 | -2.8 |
J | 392.4 | 2.8 |
K | 389.6 | 0 |
L | 385.6 | -4 |
Table 2 Variation of hardness with different sites in the casting Fe–9%Cr steel
Site | Hardness (HV) | Error range (HV) |
---|---|---|
A | 395.4 | 5.8 |
B | 392.8 | 3.2 |
C | 391 | 1.4 |
D | 389.9 | 0.3 |
E | 383.1 | -6.5 |
F | 389.2 | -0.4 |
G | 389.0 | -0.6 |
H | 390.2 | 0.6 |
I | 386.8 | -2.8 |
J | 392.4 | 2.8 |
K | 389.6 | 0 |
L | 385.6 | -4 |
Fig. 2 Microstructures and precipitates in the casting sample: a metallograph showing the microstructure of casting sample; b TEM image showing the dislocations in δ-ferrite; c TEM image showing the distribution of precipitates; d EDS results of the precipitate denoted by the frame in c
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