Wear Resistance and Interlocking Properties of AISI 5200 Steel Ball Bearings Coated by Nanocomposites

2015 ◽  
Vol 6 (3) ◽  
pp. 471 ◽  
Author(s):  
Winarto Winarto ◽  
Dedi Priadi ◽  
Nofrijon Sofyan ◽  
Martinus Adi Anggoro
Keyword(s):  
Wear Resistance ◽  
Steel Ball ◽  
Ball Bearings

Wear resistance and cutting performance of high-speed steel ball nose end mills related to the initial state of tool surface

Wear ◽  
2021 ◽  
Vol 472-473 ◽  
pp. 203711
Author(s):  
A.S. Chaus ◽  
M.V. Sitkevich ◽  
P. Pokorný ◽  
M. Sahul ◽  
M. Haršáni ◽  
...  
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
High Speed Steel ◽  
Steel Ball ◽  
Cutting Performance ◽  
Initial State ◽  
Tool Surface ◽  
End Mills

Microstructure and tribological properties of gray cast iron specimens coated by aluminizing, boronizing, chromizing and siliconizing

2012 ◽  
Vol 1516 ◽  
pp. 115-120 ◽  
Author(s):  
T. Murakami ◽  
K. Matsuzaki ◽  
Y. Gomi ◽  
S. Sasaki ◽  
H. Inui
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Tribological Properties ◽  
Gray Cast Iron ◽  
Steel Ball ◽  
Gray Cast ◽  
Iron Plate ◽  
Aisi 52100 ◽  
Alpha Olefin ◽  
Aisi 52100 Steel

ABSTRACTIn this study, aluminized, boronized, chromized and siliconized gray cast iron plate specimens were prepared, and their microstructures and tribological properties were investigated. The surfaces of the aluminized, boronized, chromized and siliconized specimens mainly consisted of FeAl, Fe2B, (Cr, Fe)23C6 and FeSi phases, respectively. Also, the surface of the boronized specimen exhibited the highest microvickers hardness of all the specimens. The aluminized, boronized and chromized specimens exhibited friction coefficients as low as the non-coated specimens when sliding against AISI 52100 steel ball specimens in poly-alpha-olefin. In addition, the boronized and chromized specimens exhibited much higher wear resistance than the non-coated specimens.

scholarly journals Penile strangulation by multiple steel ball bearings: desperate situation-desperate measures

2018 ◽  
pp. bcr-2018-227586
Author(s):  
Iqbal Singh ◽  
Dhirendra Suman ◽  
Sanjay Gupta ◽  
Gaurav Garg
Keyword(s):  
Steel Ball ◽  
Ball Bearings ◽  
Penile Strangulation

The Performance of Ball Bearings With Silicon Nitride Ceramic Balls in High Speed Spindles for Machine Tools

1988 ◽  
Vol 110 (4) ◽  
pp. 693-698 ◽  
Author(s):  
Hirotoshi Aramaki ◽  
Yoshio Shoda ◽  
Yuka Morishita ◽  
Takeshi Sawamoto
Keyword(s):  
Silicon Nitride ◽  
Temperature Rise ◽  
Machine Tools ◽  
High Speed ◽  
Low Cost ◽  
Steel Ball ◽  
Ball Bearings ◽  
Grease Lubrication ◽  
Frictional Loss ◽  
High Speeds

Two types of angular contact ball bearings for machine tools having steel rings and silicon nitride balls were tested and the temperature rise was compared with that of conventional steel ball bearings with grease lubrication and oil-air lubrication as well. Experimental results indicated that the temperature rise of silicon nitride ball bearings was much lower than that of steel ball bearings at high speeds. Calculations made using a computer demonstrated that the reduction of gyroscopic moments and centrifugal forces acting on balls because of the low density of silicon nitride resulted in about 30 to 50 percent less frictional loss at high speeds even with low-cost lubrication such as grease or oil-air.

Influence of CrCN Coatings Steel Ball Deposited by Closed Field Unbalanced Magnetron Sputtering on the Performance of Bearing

2015 ◽  
Vol 1088 ◽  
pp. 711-715
Author(s):  
Gui Xi Jia ◽  
Jia Dong Chang ◽  
Xiao Lao Sun ◽  
Yun Peng Chang
Keyword(s):  
Wear Resistance ◽  
Temperature Rise ◽  
High Speed ◽  
Ball Bearing ◽  
Steel Ball ◽  
Closed Field ◽  
Stability Performance ◽  
Unbalanced Magnetron ◽  
Load Carrying ◽  
Speed Performance

The CrCN coatings was deposited on the substrate of GCr15 steel ball by closed field unbalanced magnetron sputter ion plating. The performances of vibration, temperature rise, rotational speed, load carrying ability and wear resistance of CrCN coatings steel ball bearing and uncoated steel ball bearing were tested by a bearing tester, and also comparatively analyzed. Results show that, compared to the uncoated bearing, the CrCN coatings steel ball bearing, in the case of rotational speeds higher than 5 000 rpm, have lower vibration values, especially above 6 000 rpm, the vibration values were significantly reduced, and the coated bearing has vibration stability performance. And the coated bearing has also slower temperature rise performance, excellent high-speed performance, good load carrying capacity characteristics and wear resistance performance etc.

scholarly journals Advanced Heat Treatments and Complex Ferritic Structures for Bearing Steels

Metals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1137 ◽  
Author(s):  
G. Caballero ◽  
Pujante ◽  
Sourmail ◽  
Rementeria ◽  
De-Castro ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Fine Structure ◽  
Heat Treatments ◽  
Ball Bearings ◽  
Transformation Theory ◽  
Multi Scale ◽  
Bearing Steels ◽  
Bainitic Steels ◽  
Scale Control

Nanostructured bainitic steels exhibit an optimum strength/toughness combination as a consequence of their extremely fine structure. They have also demonstrated potential for wear-resistance applications. The aim of this work was to develop bearing steels by the multi-scale control of complex ferritic structures, designed using atomic transformation theory and processed by novel heat treatments. Based on the results, the new ball bearings outperformed conventional grades, approaching more expensive material options.

scholarly journals Experiments Relating to the Fracture of Bedrock at the Ice-Rock Interface

1984 ◽  
Vol 30 (104) ◽  
pp. 123-125 ◽  
Author(s):  
Jennifer M. Smith
Keyword(s):  
Glass Surface ◽  
Rolling Bearing ◽  
Pressure Variation ◽  
Steel Ball ◽  
Ball Bearings ◽  
Direction Of Movement ◽  
Rock Interface

AbstractMacClintock (1953) has suggested that arcuate features formed on glass by the impression of steel ball bearings may be analogous to crescentic gouges observed on formerly glaciated rock surfaces. He noted that cracks, convex in the direction of movement, are formed as bearings roll over a glass surface but not as they slide over it. MacClintock therefore proposed that the similarly orientated crescentic gouges may owe their origin to abrading clasts rolling along a glacier bed. This note describes simple experiments designed to test this view by generating friction cracks artificially. Cracks convex and concave in the direction of movement were produced by a non-rolling bearing — a result apparently incompatible with MacClintock’s proposal. It is suggested that the orientation of such cracks is less dependent on bearing rotation and more the result of pressure variation. Cracks analogous to crescentic gouges may form as a result of unloading.

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