Comparisons of laser and laser-arc hybrid welded carbon steel with beam oscillation

Hao, Kangda; Huang, Junwei; Xu, Lianyong; Liu, Youqing; Zhao, Lei; Ren, Wenjing

doi:10.1016/j.optlastec.2022.108787

Cited by 16 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fraction of LAGBs for the specimens are 31.2%, 30.2% and 25.3%, respectively. Detail analysis of the misorientation analysis indicate that LAGBs with misorientation less than 5° reach maximus at the heat input of 35J/mm [35,36]. It is generally believed that the energy of low angle grain boundary is low, and it is stable in the process of crack propagation.…”

Section: Ebsd Observation and Element Distributionmentioning

confidence: 99%

Microstructure Characterization and Mechanical Properties of Laser Welded Super High Strength QP980 Automotive Steel

Zhao,

Lu,

Xue

et al. 2023

SSP

View full text Add to dashboard Cite

The Ultrahigh strength Q&P automotive steel, i.e. QP980, has a broad application prospect in lightweight due to its high strength and good plasticity. In this study, the range of heat input (30 ~ 40 J/mm) was selected by controlling laser power in laser welding of QP980 in order to investigate the microstructure and properties of welded joint. At the heat input of 30 ~ 40 J/mm, the joint of QP980 had acceptable penetration. The weld widths were 417.93 mm, 582.02 mm and 521.56 mm, respectively. The macroscopic morphology of the joint is hourglass type. The microhardness of the welded joint hardening zone is higher than that of the base metal, and the maximum value is 519 HV0.5. When the heat input is 35 J/mm, the tensile strength of the welded joint is 1109 MPa. The maximum joint factor is 91.88 %. The fracture is close to the base metal. A large number of dimples are observed on the fracture surface, implying as ductile fracture. Based on the EBSD results, the proportion of low angle grain boundary was consistent with mechanical properties. A large number of deformation twins are formed in the 35 J/mm sample through deformation, which has a great contribution to the strength of the weld.

show abstract

Section: Ebsd Observation and Element Distributionmentioning

confidence: 99%

Microstructure Characterization and Mechanical Properties of Laser Welded Super High Strength QP980 Automotive Steel

Zhao,

Lu,

Xue

et al. 2023

SSP

View full text Add to dashboard Cite

show abstract

“…The welding methods of TIG welding and MIG welding are limited by their inherent barriers, necessitating multiple welds and often requiring the creation of large-angle grooves [2]. The large heat-affected zone and residual stress after welding are leading to poor material mechanical properties, which also restrict the material's application to a certain extent [3]. Laser welding has several benefits, including high energy density, low heat input, and quick welding speed.…”

Section: Introductionmentioning

confidence: 99%

Influence of Wire Feeding Speed on the Morphology and Properties of Stainless Steel Laser Welding Joints

Liu,

Luo,

Liu

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Using laser filler wire welding technology, welded joints were produced at varying wire feeding speeds. The microstructure and mechanical attributes of these joints were then examined through optical metallography, scanning electron microscopy, universal tensile testing, and microhardness testing. It demonstrates that superior surface formation and defect-free welded joints can be achieved through the filling wire welding process. The main components are austenite and ferrite, with slightly varying morphology and content. Through the results of tensile tests and fracture microstructure scanning, when the rate of wire supply is 2.0 meters per minute, the tensile strength reaches 650 MPa. The second phase particles were discovered in the fracture scan. According to microhardness measurements, the overall hardness of the welded joints at different wire feeding speeds is higher than that of the base material.

show abstract

“…In recent years, as a high-quality and efficient welding method, laser-arc hybrid welding has gradually become the focus of the international welding industry due to the broad application prospects and market competitiveness [ 11 ]. This method combines the advantages of the large penetration capacity of laser welding and the strong gap adaptability of arc welding [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Process Parameters on the Formability, Microstructure, and Mechanical Properties of Laser-Arc Hybrid Welding of Q355B Steel

et al. 2023

View full text Add to dashboard Cite

Thick plate steel structure is widely used in the construction machinery, pressure vessels, ships, and other manufacturing fields. To obtain an acceptable welding quality and efficiency, thick plate steel is always joined by laser-arc hybrid welding technology. In this paper, Q355B steel with a thickness of 20 mm was taken as the research object, and the process of narrow-groove laser-arc hybrid welding was studied. The results showed that the laser-arc hybrid welding method could realize one-backing and two-filling welding with the single-groove angles of 8–12°. At different plate gaps of 0.5 mm, 1.0 mm, and 1.5 mm, the shapes of weld seams were satisfied with no undercut, blowhole, or other defects. The average tensile strength of welded joints was 486~493 MPa, and the fracture position was in the base metal area. Due to the high cooling rate, a large amount of lath martensite formed in heat-affected zone (HAZ) and this zone exhibited higher hardness values. The impact roughness of the welded joint was almost 66–74 J, with different groove angles.

show abstract

Comparisons of laser and laser-arc hybrid welded carbon steel with beam oscillation

Cited by 16 publications

References 18 publications

Microstructure Characterization and Mechanical Properties of Laser Welded Super High Strength QP980 Automotive Steel

Microstructure Characterization and Mechanical Properties of Laser Welded Super High Strength QP980 Automotive Steel

Influence of Wire Feeding Speed on the Morphology and Properties of Stainless Steel Laser Welding Joints

Effect of Process Parameters on the Formability, Microstructure, and Mechanical Properties of Laser-Arc Hybrid Welding of Q355B Steel

Contact Info

Product

Resources

About