Modelling for the effect of welding process on buckling of built-up high strength steel box column

2016 ◽  
pp. 337-343
Author(s):  
J Jiang ◽  
C Lee ◽  
S Chiew
Keyword(s):  
High Strength Steel ◽  
Welding Process ◽  
High Strength

scholarly journals Welding Process Optimization of WELDOX960 High Strength Steel

2018 ◽  
Vol 207 ◽  
pp. 04005
Author(s):  
Min Hu
Keyword(s):  
Penetration Depth ◽  
Process Optimization ◽  
Process Parameters ◽  
Welding Speed ◽  
High Strength Steel ◽  
Welding Process ◽  
Welding Current ◽  
High Strength ◽  
Influence Of Process Parameters ◽  
Steel Analysis

This paper studies WELDOX960 high strength steel, analysis of the welding ability of WELDOX960 high strength steel. Analyze the weld ability of WELDOX960 high-strength steel materials, and study the influence of process parameters such as welding current, welding voltage, and welding speed on penetration depth and weld width in the automated welding process. Through this test, the welding process is optimized to ensure the weld quality. The results show that WELDOX960 high-strength steel adopts multi-layer and multi-pass welding to form better welds.

WELDOX960 Low Alloy High Strength Steel Welding Automation Manufacturability Research

2017 ◽  
Vol 748 ◽  
pp. 284-287 ◽  
Author(s):  
Min Hu
Keyword(s):  
Process Parameters ◽  
High Strength Steel ◽  
Welding Process ◽  
High Strength ◽  
Welding Robot ◽  
Welding Automation ◽  
The One ◽  
Production Conditions

This article combined with the practical production conditions,introduced the welding process parameter’s selection and operation technology of one-side welding with back formation for welding robot of WELDOX960 steel.The welding practices indicate that:when adopts the welding robot CO2+Ar to perform the one-side welding with back formation operation to WELDOX960 low alloy high strength steel,the setting of welding process parameters has the great impact to the high strength steel welding performance.

Research on Welding Process of Low Alloy High Strength Steel 20MnTiB

2019 ◽  
Vol 815 ◽  
pp. 114-119
Author(s):  
Zhen Liang Li ◽  
Hao Ke ◽  
Yang Shen ◽  
Xi Wang ◽  
Jiao Zhong
Keyword(s):  
Mechanical Properties ◽  
Welded Joints ◽  
High Strength Steel ◽  
Welded Joint ◽  
Welding Process ◽  
High Strength ◽  
Post Heat Treatment ◽  
Line Energy ◽  
Metallographic Structure ◽  
Strength Change

In this paper, the properties of the base metal of the low-alloy high-strength steel 20MnTiB, the welding process and the microstructure and properties of the welded joints were studied. The results are as follows: post-heat treatment below 400°C, the strength change of the steel decreases slowly, the elongation does not change significantly, and the metallographic structure is not obvious. When the temperature is above 400, the strength is greatly reduced. And its plasticity increases remarkably, and precipitates on the grain boundary are precipitated and grown on the metallographic structure. When the line energy is in the range of 9.6~12.0kJ/cm, the mechanical properties and microstructure of the welded joints meet the requirements, and the welding process that meets the requirements is studied. Finally, the mechanical properties and microstructure of the welded joint are studied. Provide a reference for the research and application of steel.

New Low Alloy High Strength Steel Welding Procedure Evaluation

2019 ◽  
Vol 814 ◽  
pp. 238-241
Author(s):  
Wen Juan Li
Keyword(s):  
High Strength Steel ◽  
Welded Joint ◽  
Welding Process ◽  
High Strength ◽  
Hardness Test ◽  
Ultrahigh Strength Steel ◽  
New Type ◽  
Welding Procedure ◽  
Test Result ◽  
Reliable Basis

In order to determine the weldability of a new type of low alloy high strength steel, the feasibility of the proposed welding process was examined and the welding procedure qualification of a new type of ultrahigh strength steel WELDOX 1100 was carried out through the weldability test of the welded joint, the small iron research and the highest hardness test. . The test result satisfies the specification requirements and proves that the proposed welding process plan is correct and feasible. It provides a reliable basis for the preparation of welding process documents and ensures the smooth development of the company's new products.

Feasibility study of welding dissimilar Advanced and Ultra High Strength Steels

2020 ◽  
Vol 59 (1) ◽  
pp. 54-66
Author(s):  
Francois Njock Bayock ◽  
Paul Kah ◽  
Antti Salminen ◽  
Mvola Belinga ◽  
Xiaochen Yang
Keyword(s):  
Heat Input ◽  
High Strength Steel ◽  
Gas Metal Arc Welding ◽  
Base Material ◽  
Welding Process ◽  
High Strength Steels ◽  
High Strength ◽  
Hardness Test ◽  
Welding Parameter ◽  
Welding Parameters

AbstractThis study concerns the weldability of dissimilar Ultra high-strength steel (UHSS) and advanced high-strength steel (AHSS), which is used in the modern machine industry. The materials offered superior strength as well as relatively low weight, which reduces microstructure contamination during a live cycle. The choice of the welding process base of the base material (BM) and welding parameters is essential to improve the weld joint quality. S700MC/S960QC was welded using a gas metal arc welding (GMAW) process and overmatched filler wire, which was performed using three heat input (7, 10, and 15 kJ/cm). The weld samples were characterized by a Vickers-hardness test, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). The test reveals a decrease of softening areas in the HAZ and the formation of the stable formation of Bainite-Ferrite for S700MC and Bainite-martensite for S960QC when the heat input of 10 kJ/cm is used. It is recommended to use the GMAW process and Laser welding (Laser beam-MIG), with an optimal welding parameter, which will be achieved a high quality of manufacturing products.

scholarly journals Prediction of the Shear Tension Strength of Resistance Spot Welded Thin Steel Sheets from High- to Ultrahigh Strength Range

2021 ◽  
Author(s):  
Kornél Májlinger ◽  
Levente T. Katula ◽  
Balázs Varbai
Keyword(s):  
High Strength Steel ◽  
Welding Process ◽  
High Strength ◽  
Professional Literature ◽  
Resistance Spot ◽  
Base Materials ◽  
Ultra High Strength Steel ◽  
Steel Grades ◽  
Steel Joints ◽  
Tension Strength

The tensile strength of newly developed ultra-high strength steel grades is now above 1800 MPa, and even new steel grades are currently in development. One typical welding process to join thin steels sheets is resistance spot welding (RSW). Some standardized and not standardized formulas predict the minimal shear tension strength (STS) of RSWed joints, but those formulas are less and less accurate with the higher base materials strength. Therefore, in our current research, we investigated a significant amount of STS data of the professional literature and our own experiments and recommended a new formula to predict the STS of RSWed high strength steel joints. The proposed correlation gives a better prediction than the other formulas, not only in the ultra-high strength steel range but also in the lower steel strength domain.

scholarly journals Validated Multi-Physical Finite Element Modelling of the Spot Welding Process of the Advanced High Strength Steel DP1200HD

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5411
Author(s):  
Konstantin Prabitz ◽  
Marlies Pichler ◽  
Thomas Antretter ◽  
Holger Schubert ◽  
Benjamin Hilpert ◽  
...  
Keyword(s):  
Finite Element ◽  
High Strength Steel ◽  
Spot Welding ◽  
Base Material ◽  
Welding Process ◽  
High Strength ◽  
Parameter Determination ◽  
Fe Model ◽  
Advanced High Strength Steel ◽  
Local Risk

Resistance spot welding (RSW) is a common joining technique in the production of car bodies in white for example, because of its high degree of automation, its short process time, and its reliability. While different steel grades and even dissimilar metals can be joined with this method, the current paper focuses on similar joints of galvanized advanced high strength steel (AHSS), namely dual phase steel with a yield strength of 1200 MPa and high ductility (DP1200HD). This material offers potential for light-weight design. The current work presents a multi-physical finite element (FE) model of the RSW process which gives insights into the local loading and material state, and which forms the basis for future investigations of the local risk of liquid metal assisted cracking and the effect of different process parameters on this risk. The model covers the evolution of the electrical, thermal, mechanical, and metallurgical fields during the complete spot welding process. Phase transformations like base material to austenite and further to steel melt during heating and all relevant transformations while cooling are considered. The model was fully parametrized based on lab scale material testing, accompanying model-based parameter determination, and literature data, and was validated against a large variety of optically inspected burst opened spot welds and micrographs of the welds.

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