Optimising the design of plasma torches for surface hardening of materials

2003 ◽  
Vol 17 (5) ◽  
pp. 404-406 ◽  
Author(s):  
S S Samotugin ◽  
I I Pirch ◽  
V A Mazur
Keyword(s):  
Surface Hardening ◽  
Plasma Torches ◽  
Hardening Of Materials

Complex bulk-surface hardening of materials using a highly concentrated heat source

1988 ◽  
Vol 30 (5) ◽  
pp. 317-325
Author(s):  
L. K. Leshchinskii ◽  
S. S. Samotugin ◽  
I. I. Pirch ◽  
A. V. Puiko ◽  
N. Kh. Solyanik
Keyword(s):  
Heat Source ◽  
Surface Hardening ◽  
Bulk Surface ◽  
Hardening Of Materials

Laser surface hardening and electric-spark surface hardening of materials

1988 ◽  
Vol 9 (1) ◽  
pp. 1-175 ◽  
Author(s):  
V. S. Kovalenko ◽  
A. D. Verkhoturov ◽  
L. F. Golovko ◽  
I. A. Podchernyaeva
Keyword(s):  
Surface Hardening ◽  
Laser Surface ◽  
Laser Surface Hardening ◽  
Hardening Of Materials

Study of the operation of high-voltage plasma torches with rod electrodes

2018 ◽  
Vol 56 (6) ◽  
pp. 926-931
Author(s):  
A. Safronov ◽  
◽  
O. Vasilyeva ◽  
Yu. Dudnik ◽  
V. Kuznetsov ◽  
...  
Keyword(s):  
High Voltage ◽  
Plasma Torches

Theoretical justifi cation for use of combined methods for hardening of surfaces of machine parts in order to control their fretting resistance

2020 ◽  
pp. 339-342
Author(s):  
V.F. Bez’yazychny ◽  
M.V. Timofeev ◽  
R.V. Lyubimov ◽  
E.V. Kiselev
Keyword(s):  
Surface Layer ◽  
Fatigue Limit ◽  
Surface Hardening ◽  
Theoretical Justification ◽  
Hardening Process ◽  
Subsequent Application ◽  
Machine Parts ◽  
Combined Methods

The theoretical justification for the hardening process of the surface layer of machine parts for combined methods of surface hardening with subsequent application of strengthening coatings, as well as reducing or increasing the fatigue limit due to the fretting process is presented.

On effect of surface hardening on impact and abrasive wear resistance of Hadfi eld steel

2020 ◽  
pp. 252-255
Author(s):  
V.I. Bolobov ◽  
V.S. Bochkov ◽  
E.V. Akhmerov ◽  
V.A. Plashchinsky ◽  
E.A. Krivokrisenko E.A.
Keyword(s):  
Plastic Deformation ◽  
Wear Resistance ◽  
Abrasive Wear ◽  
Work Hardening ◽  
Surface Hardening ◽  
Cold Work ◽  
Abrasive Wear Resistance ◽  
Hadfield Steel ◽  
Mining Equipment ◽  
Effect Of Surface

On the example of Hadfield steel, as the most common material of fast-wearing parts of mining equipment, the effect of surface hardening by plastic deformation on their impact and abrasive wear resistance is considered. Wear test is conducted on magnetic ironstone as typical representative of abrasive and hard rock. As result of wear of initial samples with hardness of ∼200 HB and samples pre-hardened with different intensities to the hardness of 300, 337 and 368 HB, it is found that during the initial testing period, the initial samples pass the “self-cold-work hardening” stage with increase in hardness to ∼250 HB, which remains virtually unchanged during further tests; the hardness of the pre-hardened samples does not change significantly throughout the tests. It is established that the rate of impact-abrasive wear of pre-hardened samples is significantly (up to 1.4 times) lower than the original ones that are not subjected to plastic deformation, and decreases with increasing degree of cold-work hardening. Preliminary surface hardening by plastic deformation can serve as effective way to increase the service life of fast-wearing working parts of mining equipment.

Use of ultrasonic surface hardening in modifi cation of surface layer

2020 ◽  
pp. 200-204
Author(s):  
Yu.S. Semenova ◽  
A.G. Samul’ ◽  
S.V. Mazhuga
Keyword(s):  
Surface Layer ◽  
Chemical Treatment ◽  
Surface Hardening ◽  
Manufacturing Cost ◽  
Ultrasonic Vibrations ◽  
Surface Microrelief ◽  
Scientific Schools ◽  
Structure Changes ◽  
Wide Range ◽  
Finishing Machining

Overview of the research results got by various scientific schools in the field of application of ultrasonic surface hardening is provided. Wide range of opportunities of ultrasonic surface hardening is shown for the application in the preliminary machining of surfaces before thermal and chemical treatment, coating, and also as finishing machining. The effect of the energy of ultrasonic vibrations on structure changes in the material of the surface layer and on surface microrelief on parts performance is considered. The prospects of using of the ultrasonic surface hardening method in combination with other methods of the material modification are presented. In addition the possibilities of reducing the manufacturing cost of product by introducing ultrasonic surface hardening into the technological process are shown.

scholarly journals Surface Hardening of Aluminium Alloy with Addition of Zinc Particles by Friction Stir Processing

2020 ◽  
Vol 10 (1) ◽  
pp. 408-414
Author(s):  
Nurul Muhayat ◽  
Alvian Restu Putra Utama ◽  
Keyword(s):  
Mechanical Alloying ◽  
Physical Properties ◽  
Aluminium Alloy ◽  
Friction Stir Processing ◽  
Surface Hardening ◽  
Alloy Plate ◽  
Friction Stir ◽  
Material Hardness ◽  
Mechanical And Physical Properties ◽  
Uppermost Layer

AbstractMechanical alloying can be carried out by a method known as friction stir processing, whereby solid Zn particles in a solution are distributed onto an aluminium alloy plate. The aim of this study was to determine the effects of a volume of Zn particles on the mechanical and physical properties of aluminium 1xxx alloy that had been subjected to friction stir processing. The specimens were plates composed of 1xxx series aluminium. A groove, measuring 12 mm in diameter, was pierced to various depths, and the Zn particles in these containers were then subjected to friction stir processing using a pin-less tool with a diameter of 15 mm. The results showed that the highest hardness was found in the uppermost layer of the workpiece, and this gradually decreased with thickness. An increase in the amount of Zn particles caused an increase in material hardness. The highest hardness of 87.1 HV in the friction stir-processed AA1100 was obtained at the highest volume of Zn compared to the hardness of 44.5 HV, which was obtained for the specimen without the addition of Zn.

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