narrow gap multi

A study of narrow gap laser welding for thick plates using

Dec 01, 2014 · The wider the gap was, the easier it was to cause the wire deflection phenomenon during narrow gap multi-pass welding. The wire deflection phenomenon did not occur during the first pass because the smaller size of the gap limited the wire deflection to some extent. Imperfections in narrow gap multi-layer welding Jun 01, 2020 · Narrow Gap Multi-Layer Welding (NGMLW) using a laser as the main heat source and metal wire for material addition has been a growing topic of interest in the last decade. This is in part due to its potential for joining much thicker sheets of steel than what is usually considered possible when using autogenous laser welding. The process has shown great potential but improvements can still be

Microstructure and stress distribution of TC4 titanium

Jun 24, 2020 · Plenty of researches have reported that laser-multi-pass-narrow-gap welding (laser-MPNG welding) is an optimal choice for the joining of thick plates, compared with other welding processes. For example, Keler has welded 72.5-mm-thick nickel superalloy-Alloy 617OCC plates using laser-MPNG welding, and a defect-free joint is obtained . Narrow Gap Multi (HNG) - ESAB AsiaNarrow Gap Multi (HNG) The following items have been added to your list. x. View Shopping List. Overview Documents and specs Ordering information Designed for both Single (AC or DC) and Tandem (DC/ AC or AC/AC) wire welding in parallel or almost parallel joints, ranging in width from 18 mm and in depth down to 350 mm. Narrow Gap Multi (HNG)Narrow Gap Multi (HNG) The following items have been added to your list. x. View Shopping List. Áttekintés Dokumentációk és specifikációk Rendelési információ Designed for both Single (AC or DC) and Tandem (DC/ AC or AC/AC) wire welding in parallel or almost parallel joints, ranging in width from 18 mm and in depth down to 350 mm.

Narrow Gap Welding Head - ESAB

HNG Multi . Narrow Gap Welding Head. XA00141620. HNG Multi. Single or Tandem. The HNG Multi meets the demands for a fully automatic welding process with accurate controlling of all parameters for reduced welding times and perfect weld metal when welding high-tensile material. HNG Multi is The multi-objective optimization modelling for properties Jan 18, 2021 · The V groove is usually prepared for narrow gap laser welding and filled by welding wire using multiple pass method, which can improve the fusion ability in the groove [].Therefore, the parallel groove with 2-mm gap depth, 1.4-mm width, and 3° unilateral angle was prepared, as shown in Fig. 1(b).Along welding direction, the filler wire was always in front of the laser beam to ensure Understanding and elimination of process defects in narrow In this paper, we report narrow gap multi-pass laser welding with filler wire addition of a 30mm-thick Grade 43 ferritic steel. The research focus was placed on the understanding of defect formation. The welding procedures were optimized to eliminate defects such as cracking, lack of fusion and porosity.

Characteristics of multi-pass narrow-gap laser welding of

Aug 01, 2019 · It is known that multi-pass narrow-gap laser beam welding with filler wire (LBW-F) can reduce the heat input, which reduces welding residual stress and distortion, while the use of a filler wire promotes the formation of a ferritic microstructure, which improves the toughness of the joint by the addition of alloying elements.