Conferences

EFFECT OF LASER TREATMENT ON THE QUALITATIVE PARAMETERS OF PROTECTIVE ANTIABRASIVE COATINGS

V.B.Tarelnyk,
 
Ie.V.Konoplianchenko,
 
O.P.Gaponova,
 
N.V.Tarelnyk,
 
V.S.Martsynkovskyy,
 
B.O.Sarzhanov,
 
O.A.Sarzhanov,
 
B.Antoszewski
 

Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2019, #11/12
http://www.materials.kiev.ua/article/3011

Abstract

The wear of centrifuge screws, which are widely used in plants for the treatment of industrial and domestic waste water, is considered. The TN-20 tungsten-free hardmetal serves for protecting the screw flights against abrasive wear. The 12Kh18N10T steel is the main material used for the manufacture of centrifuge screws. A combined process of applying protective wear-resistant coatings is proposed. The process includes electrospark alloying with a T15K6 hardmetal electrode, deposition of a metal polymer material (MPM), and final laser treatment. To reinforce the MPM, small portions of a VK6 hardmetal mixture were added to a two-component epoxy system filled with ferrosilicon and thoroughly mixed. The content of the reinforcing material was ~60%. This process produces coatings up to 600 μm thick, with 7.3–10.0 GPa microhardness and 100% continuity. Tests of the 12Kh18N10T steel samples with protective wear-resistant coatings for hydroabrasive wear show that their wear resistance is 7.5 times higher than that of the uncoated samples.


ABRASIVE WEAR RESISTANCE, COMBINED COATING, ELECTRIC SPARK DEPOSITION, METAL POLYMER MATERIAL, MICROHARDNESS, MICROSTRUCTURE, SURFACE ROUGHNESS, X-RAY SPECTRUM ANALYSIS