Combined method of hardening and finishing abrasive treatment of parts surfaces in magnetic field

2021 ◽  
pp. 509-519
Author(s):  
S.A. Chizhik ◽  
L.M. Akulovich ◽  
M.L. Kheifetz ◽  
S.A. Klimenko ◽  
V.I. Lavrinenko ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Wear Resistance ◽  
Surface Layer ◽  
Mathematical Models ◽  
Metal Surfaces ◽  
Combined Method ◽  
Hardening Coatings ◽  
Abrasive Treatment ◽  
Spark Discharges ◽  
Joint Method

Method and technologies of coating metal surfaces by electric spark discharges with subsequent hardening abrasive treatment in a magnetic field are considered. The possibilities of increasing the wear resistance of metal surfaces by joint method of alloying the surface layer of the part and reducing its roughness are shown. Mathematical models of these processes have been developed, which make it possible to optimize the technologies of hardening coatings.

scholarly journals A Magneto-Active Elastomer Crawler with Peristaltic and Caterpillar Locomotion Patterns

Actuators ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 74
Author(s):  
Tsam Lung You ◽  
Hemma Philamore ◽  
Fumitoshi Matsuno
Keyword(s):  
Magnetic Field ◽  
Experimental Data ◽  
External Magnetic Field ◽  
Mathematical Models ◽  
Confined Spaces ◽  
Low Mass ◽  
Structural Simplicity

In this work we present a soft crawler fabricated using a magneto-active elastomer. The crawler is controlled by an external magnetic field to produce two locomotion patterns: peristaltic and caterpillar crawling. Due to its structural simplicity, low mass, wirelessly controlled actuation and compliant body the design of this crawler has the potential to address the key challenges faced by existing crawling robots. Experimental data were gathered to evaluate the performance of the crawler locomotion in a pipe. The results validated the mathematical models proposed to estimate the distance traveled by the crawler. The crawler shows potential for use in exploration of confined spaces.

Improvement of the wear resistance of nickel-aluminium bronze and 2014-T6 aluminium alloy by application of alternating magnetic field treatment

Wear ◽  
2021 ◽  
pp. 203940
Author(s):  
Sufyan Akram ◽  
Anatolii Babutskyi ◽  
Andreas Chrysanthou ◽  
Diogo Montalvão ◽  
Mark J. Whiting ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Wear Resistance ◽  
Aluminium Alloy ◽  
Alternating Magnetic Field ◽  
Aluminium Bronze ◽  
Magnetic Field Treatment

Magnetic Confinement and Control of Trajectories of Discharge Species in Atmospheric-Pressure Analytical Spark Discharges

1987 ◽  
Vol 41 (2) ◽  
pp. 200-207 ◽  
Author(s):  
Vahid Majidi ◽  
David M. Coleman
Keyword(s):  
Magnetic Field ◽  
Atmospheric Pressure ◽  
Magnetic Confinement ◽  
Post Discharge ◽  
Conducting Channel ◽  
Filamentary Structure ◽  
Spark Discharges ◽  
Time Space ◽  
Series Of Experiments ◽  
And Control

A series of experiments, designed to help characterize the behavior of an analytical spark discharge in an external pulsed magnetic field, is described. Results include controlled formation and deformation of a spark's post-discharge torus utilizing different magnetic field configurations. One manifestation of this research was discovery of a new filamentary structure which extends from the spark conducting channel to the magnet pole face(s). These features were investigated via their refracted light (Schlieren) and spectroscopic (time/space/wavelength-resolved) properties. Practical ramifications of this control are discussed.

scholarly journals About the mechanism for reducing the adhesion wear of the copper friction pair in the inert atmosphere by the nitrogen ions implantation method

2020 ◽  
pp. 72-79
Author(s):  
V.P. Sergeev ◽  
◽  
M.P. Kalashnikov ◽  
A.R. Sungatulin ◽  
O.V. Sergeev ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Friction Pair ◽  
High Energy ◽  
Inert Atmosphere ◽  
Solid Solution Hardening ◽  
Internal Stresses ◽  
Maximum Increase ◽  
Energy Beam ◽  
Nitrogen Ions

The mechanisms of increasing the resistance of copper samples treated with a high-energy beam of nitrogen ions to adhesive wear during friction together with a copper counterbody in an argon atmosphere are studied. It was shown that the increase in wear resistance is complex and is associated with the action of mechanisms such as solid-solution hardening, grinding of copper grains, precipitation of the finely dispersed CuN3 phase, increase in the density of dislocations and internal stresses of the second kind in the surface layer . The maximum increase in wear resistance and microhardness (~ 4 and ~ 2.6 times, respectively, compared with the original copper) is observed about ion fluence of ~ 9×1017 ion/cm2. A further increase in fluencies leads to a decrease in wear resistance and microhardness due to the enlargement of the pores formed in the surface layer of copper as a result of implantation of nitrogen ions.

Increasing Wear Resistance of Steel by Optimizing Structural State of Surface Layer

2021 ◽  
Vol 51 (2) ◽  
pp. 144-147
Author(s):  
V. V. Tsyganov ◽  
R. E. Mokhnach ◽  
S. P. Sheiko
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Structural State

Surface modification of die steels with B—Al-layers by thermal-chemical treatment

2021 ◽  
pp. 557-564
Author(s):  
N.S. Ulakhanov ◽  
U.L. Mishigdorzhiyn ◽  
A.G. Tikhonov ◽  
A.I. Shustov ◽  
A.S. Pyatykh
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Surface Layer ◽  
Surface Modification ◽  
High Temperature ◽  
Chemical Treatment ◽  
Quality Parameters ◽  
Processing Temperature ◽  
Die Steels ◽  
Composite Layers

The effect of diffusion high-temperature boroaluminizing (HBA) on the mechanical properties and quality parameters of the surface layer of stamp steels 5KhNM and 3Kh2V8F is shown. An analysis of the microstructure and composition of diffusion composite layers obtained as a result of thermal-chemical treatment (TCT) is presented and the distribution of microhardness in these layers is studied depending on the formed borides and carbides. The influence of processing temperature modes of on the parameters of roughness was experimentally established and the wear resistance characteristics of the processed surfaces of the investigated materials were determined.

High-Current Pulsed Electron Treatment of Hypoeutectic Al–10Si Alloy

2017 ◽  
Vol 36 (1) ◽  
pp. 97-100 ◽  
Author(s):  
Lu Diankun ◽  
Gao Bo ◽  
Zhu Guanglin ◽  
Lv Jike ◽  
Hu Liang
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Beam Energy ◽  
High Current ◽  
Pulsed Electron Beam ◽  
Surface Nanocrystallization ◽  
Primary Si ◽  
Beam Energy Density ◽  
Eutectic Si ◽  
First Time

AbstractThis paper reports, for the first time, an analysis of the effect of high-current pulsed electron beam (HCPEB) on a hypoeutectic Al–10Si alloy. The Al–10Si alloy was treated by HCPEB in order to see the potential of this fairly recent technique in modifying its wear resistance. For the beam energy density of 3 J/cm2 used in the present work, the melting mode was operative and led to the formation of a “wavy” surface and the absence of mass primary Si phase and eutectic microstructure. The surface nanocrystallization of primary and eutectic Si phases led to the increase in macro-hardness of the top surface layer, and the wear resistance was drastically improved with a factor of 4.

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