J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (3): 266-274.DOI: 10.1016/j.jmst.2018.07.002
• Orginal Article • Previous Articles Next Articles
Chao Liuab, Quanqiang Shia, Wei Yana, Chunguang Shenc, Ke Yanga, Yiyin Shana*(), Mingchun Zhaob*()
Received:
2018-03-08
Revised:
2018-07-25
Accepted:
2018-07-27
Online:
2019-03-15
Published:
2019-01-18
Contact:
Shan Yiyin,Zhao Mingchun
About author:
1 These authors contributed equally to this work.
Chao Liu, Quanqiang Shi, Wei Yan, Chunguang Shen, Ke Yang, Yiyin Shan, Mingchun Zhao. Designing a high Si reduced activation ferritic/martensitic steel for nuclear power generation by using Calphad method[J]. J. Mater. Sci. Technol., 2019, 35(3): 266-274.
C | Cr | Ni | Mo | W | Si | Nb | V | Mn | Ta | |
---|---|---|---|---|---|---|---|---|---|---|
Eurofer97 | 0.10 | 8.87 | - | - | 1.15 | 0.05 | - | 0.20 | 0.45 | 0.14 |
F82H | 0.10 | 7.65 | 0.0015 | 0.01 | 2.1 | - | - | 0.14 | 0.16 | 0.02 |
CLAM | 0.093 | 8.96 | - | - | 1.51 | 0.05 | - | 0.16 | 0.49 | 0.14 |
JLF-1 | 0.10 | 8.85 | 1.99 | - | 0.20 | 0.45 | 0.08 | |||
9Cr2WVTa | 0.11 | 9.06 | - | - | 1.90 | 0.03 | - | 0.25 | 0.51 | 0.14 |
EP823 | 0.18 | 12 | 0.8 | 0.9 | 1.3 | 0.4 | 0.4 | 0.8 | - |
Table 1 Chemical compositions of EP823 and several RAFM steels [[4], [5], [6], [7], [8],11,12].
C | Cr | Ni | Mo | W | Si | Nb | V | Mn | Ta | |
---|---|---|---|---|---|---|---|---|---|---|
Eurofer97 | 0.10 | 8.87 | - | - | 1.15 | 0.05 | - | 0.20 | 0.45 | 0.14 |
F82H | 0.10 | 7.65 | 0.0015 | 0.01 | 2.1 | - | - | 0.14 | 0.16 | 0.02 |
CLAM | 0.093 | 8.96 | - | - | 1.51 | 0.05 | - | 0.16 | 0.49 | 0.14 |
JLF-1 | 0.10 | 8.85 | 1.99 | - | 0.20 | 0.45 | 0.08 | |||
9Cr2WVTa | 0.11 | 9.06 | - | - | 1.90 | 0.03 | - | 0.25 | 0.51 | 0.14 |
EP823 | 0.18 | 12 | 0.8 | 0.9 | 1.3 | 0.4 | 0.4 | 0.8 | - |
C | Si | Mn | P | S | Cr | Mo | W | V | Nb | N | |
---|---|---|---|---|---|---|---|---|---|---|---|
P91 | 0.08- 0.12 | 0.20- 0.50 | 0.30- 0.60 | ≤0.0020 | ≤0.0010 | 8.0- 9.9 | 0.85- 1.05 | - | 0.18- 0.25 | 0.06- 0.10 | 0.03- 0.07 |
P92 | 0.08- 0.12 | 0.20- 0.50 | 0.30- 0.60 | ≤0.0020 | ≤0.0010 | 8.0- 9.9 | 0.35- 0.55 | 1.5- 2.0 | 0.18- 0.25 | 0.06- 0.10 | 0.03- 0.07 |
Table 2 Chemical compositions of P91 and P92 (wt%) [30].
C | Si | Mn | P | S | Cr | Mo | W | V | Nb | N | |
---|---|---|---|---|---|---|---|---|---|---|---|
P91 | 0.08- 0.12 | 0.20- 0.50 | 0.30- 0.60 | ≤0.0020 | ≤0.0010 | 8.0- 9.9 | 0.85- 1.05 | - | 0.18- 0.25 | 0.06- 0.10 | 0.03- 0.07 |
P92 | 0.08- 0.12 | 0.20- 0.50 | 0.30- 0.60 | ≤0.0020 | ≤0.0010 | 8.0- 9.9 | 0.35- 0.55 | 1.5- 2.0 | 0.18- 0.25 | 0.06- 0.10 | 0.03- 0.07 |
Fig. 1 shows the equilibrium phase contents of P91 calculated by Calphad software Jmatpro and ThermoCalc, and the chemical composition is set as the intermediate value and the impurities are ignored.
10%Cr | 10.5%Cr | 11%Cr | |
---|---|---|---|
0.15%C | 2.573% | 2.570% | 2.568% |
0.2%C | 3.528% | 2.523% | 3.519% |
0.25%C | 4.531% | 4.483% | 4.473% |
Table 3 Mass fraction of M23C6 at 600?°C.
10%Cr | 10.5%Cr | 11%Cr | |
---|---|---|---|
0.15%C | 2.573% | 2.570% | 2.568% |
0.2%C | 3.528% | 2.523% | 3.519% |
0.25%C | 4.531% | 4.483% | 4.473% |
C | Cr | Mo | W | Si | V+Ta/Nb | |
---|---|---|---|---|---|---|
New steel | 0.18-0.22 | 10.0-10.5 | - | 1.0-1.5 | 1.0-1.3 | 0.3-0.45 |
P91 | 0.08-0.12 | 8.0-9.9 | 0.85-1.05 | - | 0.20-0.50 | 0.24-0.35 |
Table 4 Main compositions of new steel and P91 as comparison.
C | Cr | Mo | W | Si | V+Ta/Nb | |
---|---|---|---|---|---|---|
New steel | 0.18-0.22 | 10.0-10.5 | - | 1.0-1.5 | 1.0-1.3 | 0.3-0.45 |
P91 | 0.08-0.12 | 8.0-9.9 | 0.85-1.05 | - | 0.20-0.50 | 0.24-0.35 |
Fig. 9 shows the yield strengths and tensile strengths of P91 and newly designed RAFM steel at room temperature and high temperature, in which the mechanical performance data of P91 comes from the NIMS (National Institute for Materials Science) database [44]. The experimental results show that the mechanical properties of the present newly designed steel are more excellent at room temperature but are equivalent at high temperature, compared to P91.
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