Water cooling keyhole gas tungsten arc welding of HSLA steel

Fan, Wenfei; Ao, Sansan; Huang, Yifan; Liu, Weidong; Li, Yang; Feng, Yueqiao; Luo, Zhen; Wu, Benjamin M.

doi:10.1007/s00170-017-0234-0

Cited by 16 publications

(6 citation statements)

References 21 publications

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“…Because of the large heat input in a single pass, the materials properties become a concern. Studies have been conducted for particular materials/applications to evaluate its feasibility [24][25][26][27].…”

Section: Process Innovationsmentioning

confidence: 99%

Advanced Welding Manufacturing: A Brief Analysis and Review of Challenges and Solutions

Zhang

Yang

Wei

et al. 2020

Journal of Manufacturing Science and Engineering

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Welding is a major manufacturing process that joins two or more pieces of materials together through heating/mixing them followed by cooling/solidification. The goal of welding manufacturing is to join materials together to meet service requirements at lowest costs. Advanced welding manufacturing is to use scientific methods to realize this goal. This paper views advanced welding manufacturing as a three step approach: (1) pre-design that selects process and joint design based on available processes (properties, capabilities, and costs); (2) design that uses models to predict the result from a given set of welding parameters and minimizes a cost function for optimizing the welding parameters; (3) real-time sensing and control that overcome the deviations of welding conditions from their nominal ones used in optimizing the welding parameters by adjusting the welding parameters based on such real-time sensing and feedback control. The paper analyzes how these three steps depend on process properties/capabilities, process innovations, predictive models, numerical models for fluid dynamics, numerical models for structures, real-time sensing, and dynamic control. The paper also identifies the challenges in obtaining ideal solutions and reviews/analyzes the existing efforts toward better solutions. Special attention and analysis have been given to (1) gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW) as benchmark processes for penetration and materials filling; (2) keyhole plasma arc welding (PAW), keyhole-tungsten inert gas (K-TIG), and keyhole laser welding as improved/capable penetrative processes; (3) friction stir welding (FSW) ......

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Section: Process Innovationsmentioning

confidence: 99%

Advanced Welding Manufacturing: A Brief Analysis and Review of Challenges and Solutions

Zhang

Yang

Wei

et al. 2020

Journal of Manufacturing Science and Engineering

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“…Combined with the magnetic 'pinching' effect in plasmas -a process whereby the flow of charged particles induce a magnetic field around themselves which in turn constricts the flow of the charged particlesthe arc jet diameter is restricted and thus the energy density of the arc in increased [18]. When the Arc Pressure reaches a sufficient level, the surface tension of the weld pool can be overcome, and a keyhole is formed [19].…”

Section: Deep Penetration Weldingmentioning

confidence: 99%

A Feasibility Study Comparing Two Commercial TIG Welding Machines for Deep Penetration

2019

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Developing a deep penetration TIG welding technique to produce welds of equal quality to the industrial standard practise of laser-based welding techniques has the potential to lower production complexity and cost. Higher currents levels are required to increase penetration depth in conventional TIG welding but this results in excessive weld bead width amongst other detrimental effects. However, through K-TIG and A-TIG techniques these detrimental effects can be circumnavigated. Prior experimental work on weld pool dynamics in conventional TIG welding in higher current regions has been sparse as TIG welding enhanced through novel techniques provides the best quality welds. This paper is an early feasibility study for novel deep penetration welding techniques motivated by observations made during research done at The University of Sheffield where unexpected activity in the weld pool was identified during TIG welding with a VBC IE500DHC between 300A – 1000A. This current range is labelled the ‘Red Region’. Understanding the fluid dynamics of the molten metal in the weld pool at the ‘ Red Region' current level will help in the creation of novel techniques for deep penetration TIG welding. Addressing this, this paper compares the quality of welds produced between 100A and 200A on 316 Stainless Steel by two industrially leading welding machines; the Miller Dynasty 350 and the VBCie 500DHC.

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“…Shi Kangling et al [13] designed a water cooling structure of the base plate at the bottom of the weld and adopted a forced cooling method by passing water into the flow channel after welding. Fan feiwen et al [14] proposed a new water cooling system based on K-TIG welding by setting a cooling channel under the welding table. The principle of this method is comparable to that of Ref.…”

Section: Introductionmentioning

confidence: 99%

An Advanced Flexible Multiflow Path Fixture Cooling Method for Additive Manufacturing Repair of Aero Blades

et al. 2021

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Currently, how to release the heat accumulated in the molten pool rapidly is the key factor in blade repair. We analyzed the problem of the current cooling method in blade additive manufacturing repair. Based on cooling effect, we proposed an advanced flexible multiflow path fixture cooling method for blade additive manufacturing repair. We created a coupled heat transfer model and deduced the heat transfer law for multiflow path conjugate flexible clamping. We obtained the optimal cooling scheme for flexible multiflow paths through numerical analysis. We built an experimental platform and tested the cooling effect of the fixture prototype by experiment. The results show that compared with the current cooling method, the new cooling method not only can lower the initial temperature of the fixture rapidly and realize the steady-state heat transfer between the fixture and the flow path quickly but can also significantly enhance the ability of fluid to participate in heat transfer in new flow paths, which significantly improves the cooling effect. The research results are of great significance for the improvement of aero blade additive manufacturing repair. INDEX TERMS Cooling method, blade repair, flexible fixture, numerical analysis, heat transfer.

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Water cooling keyhole gas tungsten arc welding of HSLA steel

Cited by 16 publications

References 21 publications

Advanced Welding Manufacturing: A Brief Analysis and Review of Challenges and Solutions

Advanced Welding Manufacturing: A Brief Analysis and Review of Challenges and Solutions

A Feasibility Study Comparing Two Commercial TIG Welding Machines for Deep Penetration

An Advanced Flexible Multiflow Path Fixture Cooling Method for Additive Manufacturing Repair of Aero Blades

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