**2. Experimental**

*2.1. The Aim of the Study*

The aim of the study was to conduct a comparative analysis of basic technological parameters of automated PPTA surfacing and HPDDL surfacing on structure, chemical composition, geometry, base material content and mechanical parameters of nickel-based superalloy Inconel 625—NiCr 22M09Nb (2.4856) acc. EN 10095:2002 [41] surfaced layers on the outer surface of 16Mo3 (1.5415) acc. EN 10216–2 [42] heat resistant steel pipes.

Both assessed technologies were performed under a wide range of technological parameters to establish technical guidelines for producing surfaced layers conforming to the following criteria:


The study covered among others:

