Continuous Cooling Transformation of Under-Cooled Austenite of SXQ500/550DZ35 Hydropower Steel
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Material
2.2. Experimental Method
3. Experimental Results and Discussion
3.1. Determination of Austenitization Temperature
3.2. Determination of Critical Points
3.3. Microstructure and Hardness of the Experimental Steel at Different Cooling Rates
3.4. Drawing of CCT Curve of the Experimental Steel
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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C | Si | Mn | P | S | V | Ti | Als | O |
---|---|---|---|---|---|---|---|---|
0.11 | 0.12 | 1.18 | 0.009 | 0.001 | 0.042 | 0.004 | 0.019 | 0.0015 |
Cr | Mo | Nb | Ni | Cu | B | N | As | - |
0.506 | 0.386 | 0.035 | 1.380 | 0.020 | 0.0013 | 0.0058 | 0.017 | - |
Cold Speed/°C·s−1 | First Group | Hardness | Second Group | Hardness | |
---|---|---|---|---|---|
a | original microstructure | F + GB + P | 244 | GB + LB | 240 |
b | 0.05 | F + P + GB | 227 | F + P + GB | 232 |
c | 0.1 | GB + F + P | 233 | GB + F + P | 262 |
d | 0.6 | GB + F + LBless | 256 | GB + F | 305 |
e | 1 | GB + LB | 278 | GB + F | 307 |
f | 2 | GB + LB | 309 | GB + LB + F | 325 |
g | 3 | GB + LB | 328 | GB + LB + F | 324 |
h | 5 | LB + Mless | 345 | LB + Mless + F | 344 |
i | 10 | M + LBless | 387 | M + LBless + F | 405 |
j | 35 | M + A’ | 448 | M + A’ + F | 456 |
k | 50 | M + A’ | 422 | M + A’ + F | 454 |
Cold Speed/°C·s−1 | Fs/°C | Ff/°C | Ps/°C | Pf/°C | Bs/°C | Bf/°C | Ms/°C | Mf/°C |
0.05 | 721 | - | 623 | - | 535 | 390 | - | - |
0.1 | 699 | - | 608 | - | 552 | 404 | - | - |
0.6 | - | - | - | - | 571 | 402 | - | - |
1 | - | - | - | - | 574 | 403 | - | - |
2 | - | - | - | - | 556 | 386 | - | - |
3 | - | - | - | - | 546 | 370 | - | - |
5 | - | - | - | - | 530 | - | - | 337 |
10 | - | - | - | - | 512 | - | - | 289 |
35 | - | - | - | - | - | - | 435 | 267 |
50 | - | - | - | - | - | - | 413 | 265 |
Cold Speed/°C·s−1 | Fs/°C | Ff/°C | Ps/°C | Pf/°C | Bs/°C | Bf/°C | Ms/°C | Mf/°C |
---|---|---|---|---|---|---|---|---|
0.05 | 707 | - | 631 | - | 524 | 365 | - | - |
0.1 | 695 | - | 628 | - | 540 | 382 | - | - |
0.6 | 691 | - | 624 | - | 538 | 370 | - | - |
1 | - | - | - | - | 571 | 390 | - | - |
2 | - | - | - | - | 559 | 371 | - | - |
3 | - | - | - | - | 551 | 336 | - | - |
5 | - | - | - | - | 539 | 332 | - | - |
10 | - | - | - | - | 497 | - | - | 302 |
35 | - | - | - | - | - | - | 421 | 277 |
50 | - | - | - | - | - | - | 407 | 265 |
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Tang, Z.; Guo, R.; Zhang, Y.; Liu, Z.; Lu, Y.; Wang, F. Continuous Cooling Transformation of Under-Cooled Austenite of SXQ500/550DZ35 Hydropower Steel. Metals 2021, 11, 1562. https://doi.org/10.3390/met11101562
Tang Z, Guo R, Zhang Y, Liu Z, Lu Y, Wang F. Continuous Cooling Transformation of Under-Cooled Austenite of SXQ500/550DZ35 Hydropower Steel. Metals. 2021; 11(10):1562. https://doi.org/10.3390/met11101562
Chicago/Turabian StyleTang, Zhenglei, Ran Guo, Yang Zhang, Zhen Liu, Yuezhang Lu, and Fuming Wang. 2021. "Continuous Cooling Transformation of Under-Cooled Austenite of SXQ500/550DZ35 Hydropower Steel" Metals 11, no. 10: 1562. https://doi.org/10.3390/met11101562