Control of wire melting behavior using coaxial hybrid solid wire

Nakamura, Terumi; Hiraoka, Kazuo; Tanaka, Manabu

doi:10.2207/qjjws.29.35s

Cited by 2 publications

(7 citation statements)

References 3 publications

(5 reference statements)

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“…The generation of the CLM behaviour also depends on the materials' properties of the inner and outer parts. 5,6 Therefore, a wire structure with an appropriate composition is important for achieving a stable Ar GMA welding.…”

Section: Groove Welding Stabilitymentioning

confidence: 99%

“…5 The wire melting behaviour depends on the combination of materials and wire structure, which is the ratio of the inner and outer parts. Therefore, both of these factors are important to enable stable GMA welding in pure Ar shielding gas.…”

Section: Introductionmentioning

confidence: 99%

“…Next, a wire melting model of the CMS wire was used to discuss the influence of the wire structure on the melting behaviour. 5 Here, wire temperature and tip shape were investigated. Finally, the welding stability was examined at the V groove.…”

Section: Introductionmentioning

confidence: 99%

“…To prevent the formation of CLM in the CMS wire, a design guide for choosing a suitable combination of inner and outer materials was proposed. 5 The wire melting behaviour depends on the combination of materials and wire structure, which is the ratio of the inner and outer parts. Therefore, both of these factors are important to enable stable GMA welding in pure Ar shielding gas.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, a good bead shape was obtained, as shown in Fig.12b.As mentioned above, stable welding can be carried out in pure Ar shielding gas by shortening the CLM that is dependent on the wire structure. The generation of the CLM behaviour also depends on the materials' properties of the inner and outer parts 5,6. Therefore, a wire structure with an appropriate composition is important for achieving a stable Ar GMA welding.…”

mentioning

confidence: 99%

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Effect of coaxial welding wire structure on arc instability in argon shielding gas

Nakamura

Hiraoka

2011

Science and Technology of Welding and Joining

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The instability of gas metal arc welding in pure Ar shielding gas is associated with the structure of the coaxial multilayer solid (CMS) wire. This wire has a coaxial double structure consisting of a different composition in its inner and outer parts. In this paper, four CMS wires were developed to investigate the influence of the wire structure on the welding behaviour. First, the wire melting behaviour was observed with a high speed video camera system. Then, the relation between the welding instability and the length of the column of liquid molten metal, which causes arc instability, was analysed. Next, a wire melting simulation of the CMS wire was carried out to discuss the effect of the wire structure on the melting behaviour. Finally, the welding stability was investigated at the V groove. An excellent bead shape was obtained, and stable welding was found to be possible using an appropriate wire structure.

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Section: Groove Welding Stabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Effect of coaxial welding wire structure on arc instability in argon shielding gas

Nakamura

Hiraoka

2011

Science and Technology of Welding and Joining

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GMA welding of 9% Ni steel in the pure Argon shielding gas using coaxial multi-layer solid wire

Nakamura¹,

Hiraoka²

2012

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

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Ar K 9%Ni [ 30 p. 254-261 (2012)] ** *** GMA welding of 9% Ni steel in the pure Argon shielding gas using coaxial multi-layer solid wire by NAKAMURA Terumi and HIRAOKA Kazuo The coaxial multi-layer solid wire for 9% Ni steel have been developed to perform stable GMA welding in pure Argon shielding gas. This coaxial multi-layer solid wire has a double structure consisting of a different composition in its inner and outer parts. The average composition of this wire was the same level as the composition of the solid welding wire of 9% Ni steel. To stabilize the welding in pure Argon shielding gas, potassium compounds were used for this coaxial multi-layer solid wire. The potassium compounds were added between inner part (center wire) and outer parts (hoop). First, the wire melting behavior was observed with high-speed video camera system. Then the effect of potassium was confirmed experimentally. Next, the relation between the amount of potassium and the length of column of liquid molten metal (CLM), which causes arc instability in pure Argon shielding gas, was analyzed. The coaxial multi-layer solid wire which contained potassium more than 0.001 wt % made the CLM shorten. As a result, the stable welding in pure Argon shielding gas was achieved. Lastly, the welding was carried out at V-groove to assess the ductility and strength of joints. The coaxial multi-layer solid wire which has appropriate composition and constant current characteristics power source were used. An excellent weld joint was obtained in pure Ar shielding gas. The Charpy absorbed energy was 89 J at 77 K (-196), 0.2 proof stress was 710 MPa and tensile strength was 855 MPa.

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Control of wire melting behavior using coaxial hybrid solid wire

Cited by 2 publications

References 3 publications

Effect of coaxial welding wire structure on arc instability in argon shielding gas

Effect of coaxial welding wire structure on arc instability in argon shielding gas

GMA welding of 9% Ni steel in the pure Argon shielding gas using coaxial multi-layer solid wire

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