Acta Metallurgica Sinica (English Letters) ›› 2018, Vol. 31 ›› Issue (9): 983-996.DOI: 10.1007/s40195-018-0724-6(012
• Orginal Article • Previous Articles Next Articles
Ge Bian1,2, Ming Cheng1(), Yang Liu1, Shi-Hong Zhang1
Received:
2017-12-08
Revised:
2018-01-08
Online:
2018-09-10
Published:
2018-09-29
Ge Bian, Ming Cheng, Yang Liu, Shi-Hong Zhang. Wear Behaviors of GH4169 Super Alloy and 3Cr2W8V Tool Steel Under Dry Rolling Condition[J]. Acta Metallurgica Sinica (English Letters), 2018, 31(9): 983-996.
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URL: https://www.amse.org.cn/EN/10.1007/s40195-018-0724-6(012
Material | Cu | Zn |
---|---|---|
wt% | 67-69 | 27-28 |
Table 1 Nominal compositions of H70
Material | Cu | Zn |
---|---|---|
wt% | 67-69 | 27-28 |
Material | C eq a | Ni | Cr | Nb | Al | Ti | W eq b | V | Mo | Fe |
---|---|---|---|---|---|---|---|---|---|---|
GH4169 | ≤0.08 | 45.0-55.0 | 17.0-21.0 | 4.75-5.50 | 0.30-0.70 | 0.72-1.15 | - | - | 2.70-3.30 | Bal. |
3Cr2W8V | 1.8-2.8 | 0.2-0.3 | 2.7-6.0 | - | - | - | 8.6-12.0 | 0.3-0.5 | 0.2-0.3 | Bal. |
Table 2 Nominal compositions of the GH4169 and 3Cr2W8V (wt%)
Material | C eq a | Ni | Cr | Nb | Al | Ti | W eq b | V | Mo | Fe |
---|---|---|---|---|---|---|---|---|---|---|
GH4169 | ≤0.08 | 45.0-55.0 | 17.0-21.0 | 4.75-5.50 | 0.30-0.70 | 0.72-1.15 | - | - | 2.70-3.30 | Bal. |
3Cr2W8V | 1.8-2.8 | 0.2-0.3 | 2.7-6.0 | - | - | - | 8.6-12.0 | 0.3-0.5 | 0.2-0.3 | Bal. |
Test | Friction pair | Room temperature (°C) | Relative humidity (%) | Normal load (N) | Rotation speed (rpm) | Experiment time (s) | |
---|---|---|---|---|---|---|---|
Ring | Block | ||||||
1 | H70 | GH4169 | 21 | 40 | 200 | 200 | 1800 |
2 | H70 | 3Cr2W8V |
Table 3 Experimental details of two wear tests
Test | Friction pair | Room temperature (°C) | Relative humidity (%) | Normal load (N) | Rotation speed (rpm) | Experiment time (s) | |
---|---|---|---|---|---|---|---|
Ring | Block | ||||||
1 | H70 | GH4169 | 21 | 40 | 200 | 200 | 1800 |
2 | H70 | 3Cr2W8V |
Material | E (GPa) | σYS (MPa) | σUTS (Mpa) | ε UE | n | HVm (HV) |
---|---|---|---|---|---|---|
H21 | 235 | 1128 | 1587 | 0.14 | 0.1411 | 503 |
IN718 | 203 | 488 | 847 | 0.57 | 0.4367 | 238 |
H70 | 80 | 64 | 212 | 0.64 | 0.5304 | 84 |
Table 4 Mechanical properties of the specimens
Material | E (GPa) | σYS (MPa) | σUTS (Mpa) | ε UE | n | HVm (HV) |
---|---|---|---|---|---|---|
H21 | 235 | 1128 | 1587 | 0.14 | 0.1411 | 503 |
IN718 | 203 | 488 | 847 | 0.57 | 0.4367 | 238 |
H70 | 80 | 64 | 212 | 0.64 | 0.5304 | 84 |
Fig. 6 Roughness results: a, b surface roughness (Ra), ten-point average roughness (Rz), root-mean-square deviation (Rq) value of blocks and rings; c, d surface morphology of GH4169 and 3Cr2W8V; e, f surface morphology of H70-1 and H70-2. Rings in Test 1 and Test 2 are represented as H70-1 and H70-2, respectively.
Test | Friction pairs | Position | Ra (μm) | Rz (μm) | Rq (μm) |
---|---|---|---|---|---|
1 | H70-ring | Average | 7.178 | 44.435 | 9.479 |
GH4169-block | Average | 55.728 | 842.455 | 76.503 | |
Margin | 92.836 | 1065.808 | 138.762 | ||
2 | H70-ring | Average | 13.857 | 202.847 | 25.539 |
3Cr2W8V-block | Average | 53.261 | 482.972 | 69.954 | |
Margin | 127.553 | 1328.788 | 201.155 |
Table 5 Roughness of the worn surfaces of the specimens
Test | Friction pairs | Position | Ra (μm) | Rz (μm) | Rq (μm) |
---|---|---|---|---|---|
1 | H70-ring | Average | 7.178 | 44.435 | 9.479 |
GH4169-block | Average | 55.728 | 842.455 | 76.503 | |
Margin | 92.836 | 1065.808 | 138.762 | ||
2 | H70-ring | Average | 13.857 | 202.847 | 25.539 |
3Cr2W8V-block | Average | 53.261 | 482.972 | 69.954 | |
Margin | 127.553 | 1328.788 | 201.155 |
Fig. 7 a Experimental results on transient coefficient of friction; b wear mass transfer and wear coefficient of the wear tests’ system, ring specimens in Test 1 and Test 2 are represented as H70-1 and H70-2, respectively.
Test | Friction pair | Mass (mg) | Wear coefficient | Wear rate (×10-9 m3/s) | Ed (J) | ||
---|---|---|---|---|---|---|---|
Ring | Block | Ring | Block | ||||
1 | H70 | GH4169 | -9.4 | +3.9 | 2.17×10-6 | 1.09 | 114,982 |
2 | H70 | 3Cr2W8V | -27.5 | +4.4 | 8.36×10-6 | 3.21 | 118,752 |
Table 6 Wear parameters of two friction pairs
Test | Friction pair | Mass (mg) | Wear coefficient | Wear rate (×10-9 m3/s) | Ed (J) | ||
---|---|---|---|---|---|---|---|
Ring | Block | Ring | Block | ||||
1 | H70 | GH4169 | -9.4 | +3.9 | 2.17×10-6 | 1.09 | 114,982 |
2 | H70 | 3Cr2W8V | -27.5 | +4.4 | 8.36×10-6 | 3.21 | 118,752 |
Test | Friction pairs | HV m a (HV) | HV M b (HV) | λ (μm) | R | |
---|---|---|---|---|---|---|
1 | GH4169 | Position 1 | 238 | 306.5 | 74 | -0.0142 |
Position 2 | 346.5 | 213 | -0.0071 | |||
Position 3 | 351.5 | 205 | -0.0076 | |||
2 | 3Cr2W8V | Position 1 | 503 | 503 | 0 | 0 |
Position 2 | ||||||
Position 3 |
Table 7 Worn surface microhardness and the thickness of hardened layers
Test | Friction pairs | HV m a (HV) | HV M b (HV) | λ (μm) | R | |
---|---|---|---|---|---|---|
1 | GH4169 | Position 1 | 238 | 306.5 | 74 | -0.0142 |
Position 2 | 346.5 | 213 | -0.0071 | |||
Position 3 | 351.5 | 205 | -0.0076 | |||
2 | 3Cr2W8V | Position 1 | 503 | 503 | 0 | 0 |
Position 2 | ||||||
Position 3 |
Specimens | Microstrain (%) | Microcrystal (nm) |
---|---|---|
GH4169 | 0.347 | 21.9 |
3Cr2W8V | 0.011 | 58.7 |
Table 8 XRD analysis of microstrain of worn specimens
Specimens | Microstrain (%) | Microcrystal (nm) |
---|---|---|
GH4169 | 0.347 | 21.9 |
3Cr2W8V | 0.011 | 58.7 |
Fig. 13 The simulation maximum temperature results: a block maximum temperature with heat transfer coefficient at 5000 and 50,000 W/(m2 K); b ring maximum temperature with heat transfer coefficient at 5000 and 50,000 W/(m2 K) .
Fig. 14 The simulation of temperature distribution results of blocks: a the block is GH4169 and the heat transfer coefficient is 5000; b the block is GH4169 and the heat transfer coefficient is 50,000; c the block is 3Cr2W8V and the heat transfer coefficient is 5000; d the block is 3Cr2W8V and the heat transfer coefficient is 50,000.
Fig. 15 The simulation of die wear depth results of blocks: a the block is GH4169 and the heat transfer coefficient is 5000; b the block is GH4169 and the heat transfer coefficient is 50,000; c the block is 3Cr2W8V and the heat transfer coefficient is 5000; d the block is 3Cr2W8V and the heat transfer coefficient is 50,000.
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