New Technological Concept for Thermal Spray Protective Coatings

Abstract

Thermally spraying with micro-jet cooling is an innovate technology. It is possible to get fine dispersive structure of coatings during the shorter time in comparable to the classical high velocity oxygen fuel process (HVOF). It corresponds with good corrosion-erosion properties of structure. In the paper the parameters of the spraying with micro-jet cooling process are presented. The selected properties of coatings obtained by hybrid method are presented. The results of wear tests for hybrid and HVOF coating are compared. Results of investigation are very optimistic. The presented technology should be adapted to the actual production of protective coating for machines and construction working in wear conditions.

Welding Mobile Platforms Elements Made of Ahss Steel in View of New Requirements in Civil Engineering and Transport

“…AHSS steels are used mainly for thin-walled constructions as their strength allows for the reduction of the overall weight of the structure [11,12]. The basic welding problem of this group of steels is that the strength of the produced joint is much lower from the native material, despite the steel's good technological properties such as weldability and machinability [13,14]. Steels from the AHSS group are considered as difficult to weld since the heat-affected zone (HAZ - Figure 2) is susceptible to welding cracks even when preheated to max.…”

Archives of Metallurgy and Materials

“…Therefore, many efforts have been done to increase corrosion resistance and stability of steel materials [3,4]. There are different corrosion protection methods including cathodic/anodic protection, coatings, inhibitors and proper design [5][6][7][8]. Surface treatment is a generic way to protect metals from corrosion, which includes physical vapor deposition, chemical conversion coating, electroless and electroplating and so on [9,10].…”