Quality Requirements Put On The Inconel 625 Austenite Layer Used On The Sheet Pile Walls Of The Boiler’s Evaporator To Utilize Waste Thermally

Abstract

Quality requirements and tests taken on the surfacing layer Inconel 625 are presented in the article. The reasons of using surfacing layer Inconel 625 and technologies of its making with a particular emphasis on the CMT method are described. Quality requirements for the surfacing weld Inconel 625 are provided. Basic requirements included in the Merkblatt 1166, as well as additional requirements, which are reflected in the technical specifications of the boilers' producers are specified.Keywords: surfacing by welding, surfacing layer, incineratorPrzedstawiono kryteria jakościowe jakie powinna spełniać powłoka Inconel 625 oraz badania jakim jest poddawana. Omówiono powody dla jakich stosowana jest powłoka Inconel 625 oraz technologie jej wykonywania przy szczególnym uwzględnieniu metody CMT. Opisano wymagania jakościowe dla napoiny Inconel 625. Zaprezentowano zarówno wymagania podstawowe zawarte w Merkblatt 1166 oraz wymagania dodatkowe, których odzwierciedleniem są specyfikacje techniczne wytwórców kotłów.

Examination And Detecting Discontinuities In The Austenite Inconel 625 Layer Used On The Sheet Pile Walls Of The Boiler’s Evaporator To Utilize Waste Thermally

“…Basic examinations which the Inconel 625 [1][2][3][4][5][6][7][8][9][10][11][12] surfacing weld needs to undergo during a quality acceptance are [13]: a) Visual inspections; b) Examinations of the thickness of the surfacing weld; c) Examination of an iron (Fe) content on the surface of a surfacing weld; d) Detecting surface cracks.…”

Mechanical Properties and Microstructure of Austenite—Ferrite Duplex Stainless Steel Hybrid (Laser + GMAW) and SAW Welded Joint

“…When welding thick-walled duplex or superduplex steel components, a significant problem is the precipitation of, among others, harmful intermetallic phases, e.g., chi—or sigma—phases, within the weld volume or HAZ due to multi-pass welding [ 8 , 9 , 10 ]. The appearance of these phases contributes not only to the occurrence of brittleness, but also has a negative influence on the welded joint corrosion resistance.…”

Evaluation of the Properties and Microstructure of Thick-Walled Welded Joint of Wear Resistant Materials

“…These issues include the selection of the proper welding method, filler metals, welding procedure, as well as heat treatment and method of joint preparation for welding [ 4 , 5 ]. The appropriate selection of welding conditions should ensure that a joint with properties similar to those of the materials being joined are produced [ 6 , 7 , 8 , 9 ]. Compliance with these requirements should provide the appropriate operating conditions for all components in the structure, including the joints used in the mining or processing equipment under construction.…”