High-stress abrasion and impact-abrasion testing of wear resistant steels
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The document presents research on high-stress abrasion and impact-abrasion testing of wear-resistant steels conducted by researchers at Tampere University of Technology. It discusses the materials and methods used for testing, including the impact of hardness on wear resistance and the results of various abrasion tests. Key findings indicate that wear resistance varies with hardness, revealing differences in wear surfaces and deformation behavior among the tested materials.
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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:](https://image.slidesharecdn.com/itcpresentationslideshare-141125080519-conversion-gate02/85/High-stress-abrasion-and-impact-abrasion-testing-of-wear-resistant-steels-6-320.jpg)
![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](https://image.slidesharecdn.com/itcpresentationslideshare-141125080519-conversion-gate02/85/High-stress-abrasion-and-impact-abrasion-testing-of-wear-resistant-steels-8-320.jpg)
High-stress abrasion and impact-abrasion testing of wear resistant steels
- 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
- 3. 3 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?
- 6. 6 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
- 12. 12 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!