Compound Layer Design for Deep Nitrided Gearings
Abstract
:1. Introduction
2. Materials and Methods
2.1. Reference State
2.2. Investigated Material
2.3. Nitriding Treatments
2.4. Characterization of the Compound Layer
3. Results and Discussion
3.1. Short-Term Nitriding Treatments
3.2. One-Stage Deep Nitriding
3.3. Two-Stage Deep Nitriding
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Reference 32CDV13 | CLT | CLTP | NHD |
15–17 µm | 5–7 µm | ca. 1 mm |
Short-Term Treatments | Long-Term Treatments | ||
---|---|---|---|
Nitriding | Nitrocarburizing | One-Stage | Two-Stage |
520 °C 15 h KN = 1 | 520 °C 15 h KN = 1 KCB = 0.1 | 530 °C 170 h KN=0.5 | 520 °C 15 h KN = 5 530 °C 170 h KN = 0.5 |
520 °C 15 h KN = 3 | 520 °C 15 h KN = 5 KCB = 0.1 | 530 °C 170 h KN = 1 | 530 °C 170 h KN = 0.5 520 °C 15 h KN = 5 |
520 °C 15 h KN = 5 | 550 °C 15 h KN = 5 KCB = 0.1 | 530 °C 170 h KN = 3 | 530 °C 170 h KN = 0.5 550 °C 15 h KN = 5 |
550 °C 120 h KN = 1 | 530 °C 170 h KN = 0.5 550 °C 15 h KN = 5 KCB = 0.1 |
Nitriding | Nitrocarburizing | ||||
---|---|---|---|---|---|
520 °C 15 h KN = 1 | 520 °C 15 h KN = 3 | 520 °C 15 h KN = 5 | 520 °C 15 h KN = 1 KCB = 0.1 | 520 °C 15 h KN = 5 KCB = 0.1 | 550 °C 15 h KN = 5 KCB = 0.1 |
CLT = 2 µm | CLT = 7 µm | CLT = 12 µm | CLT = 3 µm | CLT = 6 µm | CLT = 19 µm |
CLTP = 1 µm | CLTP = 3 µm | CLTP = 5 µm | CLTP = 2 µm | CLTP = 5 µm | CLTP = 7 µm |
Nitriding | γ’-Nitride in % | ε-Nitride in % | Nitro-Carburizing | γ’-Nitride in % | ε-(Carbo-) Nitride in % |
---|---|---|---|---|---|
520 °C 15 h KN = 1 | ca. 74 | ca. 26 | 520 °C 15 h KN = 1 KCB = 0.1 | ca. 54 | ca. 46 |
520 °C 15 h KN = 3 | ca. 79 | ca. 21 | 520 °C 15 h KN = 5 KCB = 0.1 | ca. 23 | ca. 77 |
520 °C 15 h KN = 5 | ca. 89 | ca. 11 | 550 °C 15 h KN = 5 KCB = 0.1 | ca. 68 | ca. 32 |
530 °C 170 h KN = 0.5 | 530 °C 170 h KN = 1 | 530 °C 170 h KN = 3 | 550 °C 120 h KN = 0.5 |
---|---|---|---|
CLT = 6 µm | CLT = 7 µm | CLT = 18 µm | CLT = 10 µm |
CLTP = 3 µm | CLTP = 4 µm | CLTP = 12 µm | CLTP = 6 µm |
NHD = 0.75 mm | NHD = 0.83 mm | NHD = 0.88 mm | NHD = 0.85 mm |
520 °C 15 h KN = 5 530 °C 170 h KN = 0.5 | 530 °C 170 h KN = 0.5 520 °C 15 h KN = 5 | 530 °C 170 h KN = 0.5 550 °C 15 h KN = 5 | 530 °C 170 h KN = 0.5 550 °C 15 h KN = 5 KCB = 0.1 |
---|---|---|---|
CLT = 12 µm | CLT = 13 µm | CLT = 17 µm | CLT = 20 µm |
CLTP = 7 µm | CLTP = 6 µm | CLTP = 8 µm | CLTP = 8 µm |
NHD = 0.75 mm | NHD = 0.82 mm | NHD = 0.81 mm | NHD = 0.85 mm |
Two-Stage Nitriding | γ’-Nitride in % | ε-Nitride in % |
---|---|---|
520 °C 15 h KN = 5 530 °C 170 h KN = 0.5 | ca. 88 | ca. 12 |
530 °C 170 h KN = 0.5 520 °C 15 h KN = 5 | ca. 85 | ca. 15 |
530 °C 170 h KN = 0.5 550 °C 15 h KN = 5 | ca. 88 | ca. 12 |
530 °C 170 h KN = 0.5 550 °C 15 h KN = 5 KCB = 0.1 | ca. 60 | ca. 40 |
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Hoja, S.; Steinbacher, M.; Zoch, H.-W. Compound Layer Design for Deep Nitrided Gearings. Metals 2020, 10, 455. https://doi.org/10.3390/met10040455
Hoja S, Steinbacher M, Zoch H-W. Compound Layer Design for Deep Nitrided Gearings. Metals. 2020; 10(4):455. https://doi.org/10.3390/met10040455
Chicago/Turabian StyleHoja, Stefanie, Matthias Steinbacher, and Hans-Werner Zoch. 2020. "Compound Layer Design for Deep Nitrided Gearings" Metals 10, no. 4: 455. https://doi.org/10.3390/met10040455