scholarly journals Surface Integrity Achieved by Finishing Processes on Sverker 21 and Vanadis 6 Cold Working Tool Steels

2015 ◽  
Author(s):  
W. Brostow ◽  
K. Czechowski ◽  
M. Kot ◽  
P. Rusek ◽  
D. Toboła
Keyword(s):  
Surface Integrity ◽  
Cold Working ◽  
Impact Testing ◽  
Favorable Effect ◽  
Tool Steels ◽  
Industrial Performance ◽  
Steel Surfaces ◽  
Finishing Processes ◽  
Performance Results ◽  
Ball On Disc

Control of surface integrity is an important factor for components like cold working tools exposed to wear and fatigue damage. We have performed a number of operations on Sverker 21 and Vanadis 6 steel surfaces: turned + burnished, turned + nitrided and turned + burnished + nitrided. The effects were followed by surface roughness and microstructure analysis, ball-on-disc tribology and impact testing. The sequence of turned + burnished + nitrided treatments has the most favorable effect on the surface integrity of the finished tools and their industrial performance. Results will be presented at the Conference.

Thick Si-doped DLC coatings with high load bearing capacity on cold working tool steels by PECVD

2021 ◽  
pp. 1-19
Author(s):  
Xinyu Wang ◽  
Xudong Sui ◽  
Shuaituo Zhang ◽  
Mingming Yan ◽  
Yan Lu ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Cold Working ◽  
Chemical Vapor ◽  
Tool Steels ◽  
Dlc Coatings ◽  
Wear Rates ◽  
Si Doped ◽  
Silicon Doped ◽  
Hydrogenated Amorphous ◽  
Degree Of Graphitization

Abstract For improving the wear resistance, thick silicon doped hydrogenated amorphous carbon (a-SiC:H) coatings were deposited on cold working tool steels by Plasma Enhanced Chemical Vapor Deposition (PECVD) technology. The increase of the acetylene (C2H2) flow rate distinctly tuned the microstructure of a-SiC:H coatings, including an increase in the coating thickness (>15 μm), a decrease in the silicon content, a greater sp2/sp3 ratio and higher degree of graphitization. The highest hardness of 19.61 GPa and the greatest critical load of 50.7 N were obtained. The coating showed low wear rates against different friction pairs and presented excellent abrasive wear resistance at high applied load and the wear rates decreased with increasing loads, which exhibited an outstanding application prospect in cold working tool steels.

Mechanical finishing and ion beams application to cold working tool steels: consequences for scratch resistance

2018 ◽  
Vol 8 (01) ◽  
pp. 178-182
Author(s):  
Witold Brostow ◽  
Sven Lohse ◽  
Allison T. Osmanson ◽  
Daniel Tobola ◽  
Duncan L. Weathers
Keyword(s):  
Cold Working ◽  
Scratch Resistance ◽  
Ion Beams ◽  
Tool Steels ◽  
Image Position

Abstract

scholarly journals Micro-Pitting and Wear Assessment of PAO vs Mineral-Based Engine Oil Operating under Mixed Lubrication Conditions: Effects of Lambda, Roughness Lay and Sliding Direction

Lubricants ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 42 ◽  
Author(s):  
Aleks Vrček ◽  
Tobias Hultqvist ◽  
Yannick Baubet ◽  
Marcus Björling ◽  
Pär Marklund ◽  
...  
Keyword(s):  
Bearing Steel ◽  
Mixed Lubrication ◽  
Operating Conditions ◽  
Engine Oil ◽  
Engine Oils ◽  
Rolling Contacts ◽  
Steel Surfaces ◽  
Wear Damage ◽  
Lubrication Conditions ◽  
Ball On Disc

Under certain operating conditions, rolling contacts have been shown to experience some challenges when lubricated with engine oils containing zinc dialkyldithophosphate (ZDDP) anti-wear additive. In order to better understand the main damage mechanisms during various operating conditions, further studies are needed. This article studies micro-pitting and wear damages of bearing steel surfaces under mixed lubrication conditions in a ball-on-disc setup, lubricated with different engine oils. Based on the results, micro-pitting and wear damage is shown to be highly case-dependent. In general, PAO-based engine oil tends to eliminate micro-pitting damage compared to mineral-based engine oil at less severe lubricating conditions. Moreover, a critical lambda was found for both oils, where the highest micro-pitting damage was observed.

Improvement of wear resistance of some cold working tool steels

Wear ◽  
2017 ◽  
Vol 382-383 ◽  
pp. 29-39 ◽  
Author(s):  
Daniel Toboła ◽  
Witold Brostow ◽  
Kazimierz Czechowski ◽  
Piotr Rusek
Keyword(s):  
Wear Resistance ◽  
Cold Working ◽  
Tool Steels

scholarly journals Surface Integrity of Tool Steels Multi-cut by Wire Electrical Discharge Machining

2014 ◽  
Vol 81 ◽  
pp. 1945-1951 ◽  
Author(s):  
Chuanliang Cao ◽  
Xianglin Zhang ◽  
Xiang Zha ◽  
Chunfa Dong
Keyword(s):  
Surface Integrity ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Wire Electrical Discharge Machining ◽  
Tool Steels

scholarly journals Manufacturing of Tool Steels by PBF-EB

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1640
Author(s):  
Alexander Kirchner ◽  
Burghardt Klöden ◽  
Marie Franke-Jurisch ◽  
Luis Inarra Rauh-Hain ◽  
Thomas Weißgärber
Keyword(s):  
Crack Formation ◽  
Cold Working ◽  
High Strength ◽  
Tool Steels ◽  
High Corrosion Resistance ◽  
Powder Bed ◽  
Material Development ◽  
Processing Strategies ◽  
Time Savings ◽  
Am Processes

Additive manufacturing (AM) of metals is stimulating the tool making industry. Moreover, besides the production of lost forms, AM processes are now being used to directly generate tools, molds or parts, leading to massive time savings. In the case of material development for AM, the challenge is to operate with carbon-containing iron-based materials distinguished by high strength and hardness, as well as high corrosion resistance and thermal conductivity. Often, those materials are susceptible to crack formation during processing. Using Electron Beam Powder Bed Fusion (PBF-EB), the challenge of crack formation can be overcome by using high process temperatures in the range 800–900 °C. In this paper, results on the processing of a cold-working tool steel (X65MoCrWV3-2) and a hot-working steel (X37CrMoV5-1) will be presented. These include the processing window, processing strategies to minimize the density of cracks and properties with respect to microstructure and hardness.

Development Status and Trends of Mass Finishing Processes

2014 ◽  
Vol 621 ◽  
pp. 111-120 ◽  
Author(s):  
Wen Hui Li ◽  
Sheng Qiang Yang ◽  
Xiu Hong Li ◽  
Wei Dong Li
Keyword(s):  
Surface Integrity ◽  
Industrial Application ◽  
Mass Finishing ◽  
Part Surface ◽  
Material Removal Model ◽  
Process Database ◽  
Finishing Processes ◽  
Further Development ◽  
Removal Model ◽  
Full Investigation

Mass finishing processes have widely industrial application, and in most conditions these processes are used with empiricism and trial and error. Based on basic concept of mass finishing, its category is presented. Main aspects of motion and force analysis, material removal model, equipment and consumables, process experiments and industrial application are induced. Finally, development trends are recommended from quantified models, process database, new mass finishing processes and surface integrity. This will provide full investigation and further development and research to improvement part surface integrity.

Sign in / Sign up

Export Citation Format

Share Document