A conference presentation given in International Tribology Conference 2011. For full article please visit https://www.jstage.jst.go.jp/article/trol/8/2/8_152/_article

1. High-Stress Abrasion and Impact-Abrasion Testing of Wear Resistant Steels Vilma Ratia, Kati Valtonen, Minnamari Vippola and Veli-Tapani Kuokkala Tampere University of Technology, Department of Materials Science, Tampere Wear Center, Tampere, Finland Anu Kemppainen Ruukki Metals Oy, Finland Presented at: International Tribology Conference Hiroshima, Japan 30.10.-3.11.2011

2. 2
Greetings from Tampere, Finland
25.11.2014

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Tampere Wear Center - TWC
Metals
Composites
Polymers
Coatings
Ceramics
Collaborating universities
and research institutes
TWC
- Basic research on wear
- Wear in various applications
- Design for better wear
resistance
- Selection and development
of wear resistant materials
Companies
- Expertise in
processes
- Design
- Wear in various
industrial
applications
- Selection of
materials
- Business
models
TUT / DMS
- Testing
- Manufacturing
- Modelling
- Simulation
- Characterization
- Corrosion

4. 4
Contents
• Introduction
• Materials and methods
• Results and discussion:
• Mass loss vs. hardness
• Wear surfaces
• Conclusions

5. Introduction: Why to test?

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Materials and methods: Materials
Abrasive: Granite
• From Sorila quarry, Finland
• Abrasiveness 1920 g/t
• Crushability 34%
Material Crushing pin-on-disc Uniaxial crusher Impeller-tumbler
S355 162 162 154
Raex 400 368 368 403
Raex 450 456 445 456
Raex 500 492 469 492
Hardness [HBW] of the tested materials:

7. Materials and methods: Methods
Crushing pin-on-disc Uniaxial crusher Impeller-tumbler
sample
Method Type Motion Force Abrasive size
Crushing pin-on-disc High-stress abrasion crushing 200 N 2-10 mm
sliding
Uniaxial crusher High-stress abrasion crushing 53 kN 4-6.3 mm
Impeller-tumbler Impact-abrasion impact N/A 10-12.5 mm
sliding

8. Results and discussion: Mass loss vs. hardness
0.0
0.5
1.0
1.5
2.0
2.5
150 200 250 300 350 400 450 500
Hardness [HBW]
Mass loss vs. reference (Raex 400)
Crushing pin-on-disc
Uniaxial crusher
Impeller-tumbler

9. Results and discussion: Wear surfaces of samples tested with crushing pin-on-disc
S355
Raex 400

10. Results and discussion: Wear surfaces of samples tested with uniaxial crusher
S355
Raex 500

11. Results and discussion: Wear surfaces of samples tested with impeller-tumbler
S355
Raex 400

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Conclusions
• Effect of hardness on wear resistance varied
Crushing abrasion (uniaxial crushing)
Three-body abrasion (crushing pin-on-disc)
Impact-abrasion (impeller-tumbler)
• Wear surfaces
•More plastic deformation in steels with lower hardness
•Larger surface formations
•Scratches more visible in harder steels
•Less plastic deformation
•Transition in wear mechanism
•Cutting

13. Thank you for your attention!