Optimization of Parameters on Robotized Gas Metal Arc Welding of LNE 700 High-Strength Steel

Lermen, Richard Thomas; Molin, Anderson Dal; Berger, Djeison Rangel; Alves, Valtair De Jesus; Lisboa, Camila Pereira

doi:10.3390/jmmp2040070

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…Four parameters were considered: (1) finishing rolling speed, (2) finishing rolling temperature, (3) coiling speed, and (4) coiling temperature. Table 1 lists the different variations of the four parameters using an L9 Taguchi orthogonal configuration [14].…”

Section: Methodsmentioning

confidence: 99%

Optimization of Hot Rolling Scheduling of Steel Strip with High Bending Performance

Feng¹,

Lin²,

Chuang³

et al. 2022

Materials

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Poor formability in hot-rolled strips may be attributed to the many pearlite-banded structures (PBSs) that develop in steel during the hot-rolling process. The challenge of manufacturing strips with minimum PBSs is that multiple factors influence the amount and distribution of the PBSs. This study used the Taguchi method to find the optimum hot-rolling parameters to obtain strips with a reduced number of PBSs. The strips were then subjected to bending tests to evaluate their ductility. The first part analyzes the contribution of selected parameters to the hot-rolling process: (1) finishing rolling temperature, (2) finishing rolling speed, (3) coiling temperature, and (4) coiling speed. The second part confirms, using bending tests, the influence of the finishing rolling temperatures 780, 800, 820, 840, 860, 870, and 880 °C on the formability of an A36 hot-rolled strip. Based on the experimental protocol for the study, the optimal process parameters were determined to be the finishing rolling speed (0.80 m/s), finishing rolling temperature (870 °C), coiling speed (2.80 m/s), and coiling temperature (650 °C). When the A36 strip was prepared at the optimum parameters, the average length and thickness of the PBS were 108.61 ± 0.11 μm and 10.18 ± 0.12 μm, respectively. According to the Taguchi analysis, the finishing rolling temperature had the most significant influence on the dimensions of the PBS. In tests where the hot-rolled A36 strip was bent to 90° and 180°, at the finishing rolling temperatures of 870 °C and 880 °C, no cracking was observed at the R angle.

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Section: Methodsmentioning

confidence: 99%

Optimization of Hot Rolling Scheduling of Steel Strip with High Bending Performance

Feng¹,

Lin²,

Chuang³

et al. 2022

Materials

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“…Welding is a suitable joining process in structural application. Previous literatures already reported the degradation of tailored properties and microstructure due to the welding thermal cycle in the joining of 700 MC steel [17,18]. Hence, understanding the phase transformation behaviour and optimization of heat inputs is essential to obtain adequate strength and toughness of the weld.…”

Section: Introductionmentioning

confidence: 99%

Physical simulation on Joining of 700 MC steel: A HAZ and CCT curve study

Roshan¹,

Naik²,

Saxena³

et al. 2022

Mater. Res. Express

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In the present work, a coarse grain heat-affected zone (CGHAZ) was simulated by Gleeble 3800 thermo-mechanical simulator. A continuous cooling transformation (CCT) diagram was generated from the results of the dilatometer, hardness, and microstructure analysis. The heating rate of 100°C/s, the peak temperature of 1300°C, the holding time of one second, and thirteen different cooling conditions representing the actual welding condition were chosen here for simulation where the cooling rate was controlled by t8/3. At slow cooling rate ferrite, cementite, pearlite, and bainite were obtained. At a medium cooling rate, ferrite, bainite, and a small amount of martensite were observed. At a fast-cooling rate i.e., 100°Cs-1 fully martensite was obtained. The obtained hardness values were 225 HV, 263 HV, and 342 HV for slower, medium, and fast cooling rates respectively. The increase in hardness value shows that the amount of non-diffusional phases increases with an increase in cooling rate. The CCT curve shows the range of cooling rate and phase transformation temperature of ferrite, bainite, and martensite.

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Advance High-Strength Steel for External Diaphragm Box Column Production by Using Robotic GMAW

Khammongkhon¹,

Suksawat²,

Kakuta³

2020

IJMERR

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Optimization of Parameters on Robotized Gas Metal Arc Welding of LNE 700 High-Strength Steel

Cited by 4 publications

References 18 publications

Optimization of Hot Rolling Scheduling of Steel Strip with High Bending Performance

Optimization of Hot Rolling Scheduling of Steel Strip with High Bending Performance

Physical simulation on Joining of 700 MC steel: A HAZ and CCT curve study

Advance High-Strength Steel for External Diaphragm Box Column Production by Using Robotic GMAW

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