Study on Resistance Spot Welding Technology and Properties of TRIP800 High Strength Steel Sheet

2011 ◽  
Vol 391-392 ◽  
pp. 661-665
Author(s):  
Yan Yu ◽  
Feng Xue Wang ◽  
Zai Dao Yang
Keyword(s):  
Mechanical Properties ◽  
High Strength Steel ◽  
Spot Welding ◽  
Welding Current ◽  
High Strength ◽  
Welding Parameters ◽  
Welding Time ◽  
Test Analysis ◽  
Welding Technology ◽  
Welding Electrode

A series of spot welding technology, joint mechanical properties and microhardness test analysis of TRIP800 high strength steel were researched. Based on these experiments and analysis, effect of spot welding parameters such as welding current, welding time and electrode pressure on joint mechanical properties were explored. The relevant spot welding parameters of TRIP800 high strength steel of spot welding were recommended, such as welding current is7.5~8.0KA, electrode pressure is 450 kgf and welding time is 20cyc. Welding electrode should be to ensure that as much as possible and clean the surface,to avoid welding current and welding time is too high or too long, as well as forging lack of power, to prevent the occurrence of welding defects.

Study on Welding Technology of Low Alloy High Strength Steel

2019 ◽  
Vol 814 ◽  
pp. 242-247
Author(s):  
Min Hu
Keyword(s):  
Mechanical Properties ◽  
Welded Joints ◽  
High Strength Steel ◽  
Steel Sheet ◽  
Welding Current ◽  
High Strength ◽  
Structural Steels ◽  
Metallographic Analysis ◽  
Weld Width ◽  
Welding Technology

WELDOX series steels are commonly used structural steels. The effects of welding voltage, welding current and arc height on penetration and weld width of WELDOX960 steel sheet were studied. The mechanical properties and microstructure of WELDOX960E high strength steel welded joints were study by tensile, bending, impact, hardness and metallographic analysis.

scholarly journals Effect of Microstructure and Texture on Mechanical Properties of Resistance Spot Welded High Strength Steel 22MnB5 and 5A06 Aluminium Alloy

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 685
Author(s):  
Xiaoqing Jiang ◽  
Shujun Chen ◽  
Jinlong Gong ◽  
Zhenyang Lu
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Aluminium Alloy ◽  
High Strength Steel ◽  
High Strength ◽  
Welding Parameters ◽  
Tensile Shear Strength ◽  
Tensile Shear ◽  
Resistance Spot ◽  
Effect Of Microstructure

The present study aims to investigate the effect of microstructure and texture on mechanical properties of resistance spot welding of high strength steel 22MnB5 and 5A06 aluminium alloy as a function of welding parameters. The pseudo-nugget zones (NZs) at the steel side have undergone full recrystallisation with a fine-grained ferrite structure containing a small amount of retained austenite and a high hardness of approximately 500 HV, which is a 35% increase in hardness compared to the base material (BM) with fine lath martensitic structure. The NZs at the Al side contain both a recrystallisation texture and shear texture. Higher tensile shear strength with increasing weld time could be linked to the random texture at the Al side. The highest tensile shear strength was achieved at an intermetallic layer thickness of 4 mm.

Hot Stamping High Strength Steel Spot Welding Technology and Quality Evaluation of Welding Joint

2014 ◽  
Vol 1063 ◽  
pp. 181-185
Author(s):  
Su Feng Hao ◽  
Zhong De Shan ◽  
Shu Jun Chen ◽  
Chao Jiang
Keyword(s):  
High Strength Steel ◽  
Spot Welding ◽  
Quality Evaluation ◽  
Hot Stamping ◽  
High Strength ◽  
Interfacial Fracture ◽  
Welding Parameters ◽  
Local Cooling ◽  
Welding Joint ◽  
Pull Out

The heterogeneity of microstructure and mechanical performance of welding joints were affected by unique material properties such as high resistivity and low thermal conductivity, instantaneous high temperature of spot welding thermal cycle, and uneven local cooling rate. Because of ultra high strength of hot stamping parts, the welding joint is more inclined to fail as the failure mode of interfacial fracture, the traditional critical nugget formula fell down. Through designing orthogonal experiment, the effect of different welding parameters on joint performance was analyzed, the optimized welding process was obtained; on account of the quality evaluation of welding joint, nugget spherical mode was built to separately analyze the stress condition of welding joint in the failure modes of interfacial fracture and nugget pull-out, the new evaluation criterion aimed at high strength steel was established. Two kinds of 1.2 mm and 2.0 mm steels were used to validate the critical weld diameter. Results showed that the critical formula could accurately evaluate failure of the weld joints.

scholarly journals Effect of Severe Welding Conditions on Liquid Metal Embrittlement of a 3rd-Generation Advanced High-Strength Steel

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1166
Author(s):  
Outhmane Siar ◽  
Yacine Benlatreche ◽  
Thomas Dupuy ◽  
Sylvain Dancette ◽  
Damien Fabrègue
Keyword(s):  
Liquid Metal ◽  
High Strength Steel ◽  
Spot Welding ◽  
High Strength ◽  
Holding Time ◽  
Liquid Metal Embrittlement ◽  
Welding Parameters ◽  
Advanced High Strength Steel ◽  
Electrode Force ◽  
Influential Parameters

The occurrence of liquid metal embrittlement (LME) during the resistance spot-welding of a zinc-coated Advanced High-Strength Steel (TRIP-aided AHSS) is investigated in this work. Welds are generated using controlled degradation of the welding conditions to favor the occurrence of LME cracks in a two-sheets homogeneous configuration. Detailed inspection of the welds shows that electrode misalignment, short holding time, low electrode force and long welding time constitute a propitious environment for both inner and outer LME cracks. A statistical analysis allows weighting and interpreting of the significance of the welding parameters. Electrode misalignment and reduced holding time appear as the most influential parameters in the design of experiment. Moreover, it is worth noting that standard ISO welding conditions are prone to avoid any LME cracks in the investigated two-sheets homogeneous configuration.

Effect of Welding Current and Welding Time for Micro Resistance Spot Welding on Dissimilar Thin Thickness Materials of Al 1100 and KS 5 Spring Steel

2016 ◽  
Vol 842 ◽  
pp. 120-124 ◽  
Author(s):  
Ario Sunar Baskoro ◽  
Hakam Muzakki ◽  
Winarto
Keyword(s):  
Cycle Time ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Welding Current ◽  
Spring Steel ◽  
Welding Parameters ◽  
Shear Load ◽  
Welding Time ◽  
Resistance Spot ◽  
Fracture Area

In the dissimilar materials and dissimilar thin thickness sheets joining, welding current and welding time parameters of resistance spot welding (RSW) effect weld ability. RSW used for joining thin plate less than 1000 μm is called micro-resistance spot welding (μRSW). The objective of this article is to study the effect of welding current and welding time to the joining dissimilar thin thickness materials and the microstructure of a weld joint. The thickness of Al 1100 is 400 μm, and KS 5 Spring Steel is 200 μm. Welding parameters are Cycle Time 0.5, 1, 1.5, Welding Current 1kA and 2 kA, and holding time 10 second. Welding current 1kA, Cycle time of 0.5 produce maximum shear load of 227.4 N and fracture area of 6.644 mm2. Welding current 2 kA, cycle time of 1.5 affect maximum load of 222.7 N and fracture area of 10.559 mm2. Welding parameters lead to the majority fracture on aluminum material. The welding current and cycle time do not significantly affect maximum shear load and fracture area.

Influence of Welding Parameters on the Quality of Resistance Spot Welded Joints of DP600 Steels

2014 ◽  
Vol 635 ◽  
pp. 143-146 ◽  
Author(s):  
Ľuboš Kaščák ◽  
Emil Spišák ◽  
Ivan Gajdoš
Keyword(s):  
Automotive Industry ◽  
Automobile Industry ◽  
Welded Joints ◽  
Spot Welding ◽  
Welding Current ◽  
High Strength ◽  
Welding Parameters ◽  
Resistance Spot ◽  
Resistance Spot Welds ◽  
Spot Welded

Advanced high-strength dual-phase steel was developed specifically for automotive industry in order to benefit from its excellent formability and great crash absorption ability in comparison with conventional AHSS. Resistance spot welding is the dominant and effective method of joining metal sheets in automobile industry. After spot welding, important changes occur in mechanical and metallurgical properties of the spot welded areas and heat affected zones. The investigation into these changes is very important for safety, which depends on the strength of the welded joints. Weldability of the DP steel is one of the key factors governing its application in automotive industry. The influence of the primary welding parameters, especially welding current, on the weld quality was investigated by testing microhardness and tensile shear load bearing capacity of resistance spot welds of DP600 steel sheets.

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