Continuous bending and straightening technology of Q345c slab based on high-temperature creep deformation

Guo, Long; Zhang, Xingzhong; Feng, Changxi

doi:10.1016/s1006-706x(17)30090-0

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…Due to its comprehensive mechanical properties and welding properties, it has been widely used in railways, bridges, industrial plants, boilers, pressure vessels, steel fuel tanks, power stations and other manufacturing structural components. The main microstructures of the Q345C steel used in the test were ferrite and pearlite, which has strong mechanical and fatigue properties such as strength, toughness and weldability [ 25 ]. Its chemical composition is shown in Table 1 .…”

Section: Methodsmentioning

confidence: 99%

Effects of Different Pre-Heating Welding Methods on the Temperature Field, Residual Stress and Deformation of a Q345C Steel Butt-Welded Joint

Jie

Zhong³

et al. 2023

Materials

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Heavy plate welding has been widely used in the construction of large projects and structures, in which the residual stress and deformation caused by the welding process are the key problems to address to reduce the stability and safety of the whole structure. Strengthening before welding is an important method to reduce the temperature gradient, control the residual stress and reduce the deformation of welds. Based on the ABAQUS software, the thermal elastoplastic finite element method (FEM) was used to simulate the welding thermal cycle, residual stress and deformation of low-alloy, high-strength steel joints. Based on the finite element simulation, the influences of flame heating and ceramic heating on the temperature field, residual stress distribution and deformation of a Q345C steel butt-welded joint were studied. The results showed that the thermal cycle of the ceramic sheet before welding had little influence on the whole weldment, but had great influence on the residual stress of the weldment. The results show that the maximum temperature and residual stress of the welded parts are obviously weakened under the heating of ceramic pieces, and the residual stress of the selected feature points is reduced by 5.88%, and the maximum temperature of the thermal cycle curve is reduced by 22.67%. At the same time, it was concluded that the weld shapes of the two were basically the same, but the weld seams heated by ceramic pieces had a better weld quality and microstructures through comparing the macro- and micro-structures between the welded parts heated by ceramic pieces and the simulated weld. Heating before welding, therefore, is an effective method to obtain a high weld quality with less residual stress and deformation.

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Section: Methodsmentioning

confidence: 99%

Effects of Different Pre-Heating Welding Methods on the Temperature Field, Residual Stress and Deformation of a Q345C Steel Butt-Welded Joint

Jie

Zhong³

et al. 2023

Materials

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“…Bar strains can be sort out according to the phenomenon that produces them. Mechanical sources such as bulging (as previously studied by Grill and Schwerdtfeger, 1979;Matsumiya and Nakamura, 1983;Yoshii and Kihara, 1986; and later by Dalin and Chenot, 1988;Okamura and Kawashima, 1993), roller misalignment (Lin, 2001) and soft reduction (Wang et al, 2016) are usual in slab casting, while bending / unbending strains (Mostert et al, 2001;Guo et al, 2017) are generated in curved machines, regardless of the section type. Pinch-roll compression induced strains are particularly detrimental in round sections (Poltarak et al, 2017).…”

Section: Introductionmentioning

confidence: 95%

A continuous straightening formulation based on minimum curvature variation

Poltarak

Ferro

2019

IJMPT

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A continuous straightening formulation is proposed in order to smooth the transition between the curved and straight sectors in a continuous caster of metals. This is accomplished by minimising the curvature variation in the straightening sector, taking into account boundary conditions usually found when designing or modifying continuous casting machines. A differential equation is obtained for the bar trajectory which is numerically solved after discretisation. The obtained algorithm is used to compare different casting configurations whose smoothness is quantified in terms of the strain and strain rate along the bar. The continuous straightening configurations developed by this formulation were found to be smoother than typical setups with 1 or 2 straightening points. It was also found that the longer the straightening length, the smoother the transition.

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High-temperature creep constitutional model of Q460E steel and effect of creep on bulging deformation of continuous casting slab

Guo

Sui

Zhang

2018

J. Iron Steel Res. Int.

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Continuous bending and straightening technology of Q345c slab based on high-temperature creep deformation

Cited by 3 publications

References 13 publications

Effects of Different Pre-Heating Welding Methods on the Temperature Field, Residual Stress and Deformation of a Q345C Steel Butt-Welded Joint

Effects of Different Pre-Heating Welding Methods on the Temperature Field, Residual Stress and Deformation of a Q345C Steel Butt-Welded Joint

A continuous straightening formulation based on minimum curvature variation

High-temperature creep constitutional model of Q460E steel and effect of creep on bulging deformation of continuous casting slab

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