scholarly journals Resistance spot welding of a thin 0.7 mm EN10130: DC04 material onto a thicker 2.4 mm 817M40 engineering steel

2021 ◽  
Vol 121 (10) ◽  
pp. 1-7
Author(s):  
K.A. Annan ◽  
R.C. Nkhoma ◽  
S. Ngomane
Keyword(s):  
Welded Joints ◽  
Room Temperature ◽  
Welding Current ◽  
Rapid Quenching ◽  
Zero Temperature ◽  
Current Electrode ◽  
Resistance Spot ◽  
Electrode Force ◽  
Engineering Steel ◽  
Resistance Spot Weld

The effects of welding current, electrode force, and welding time in a resistance spot weld were studied to investigate the effectiveness of welded joints between a thin EN10130: DC04 material and a thicker 817M40 part, through analysis of the microstructural and mechanical properties. All welded specimens were subjected to tensile testing at room temperature (25°C) and sub-zero temperature (-46°C) to test the strength of the welded joints. No full button failure was observed at either room temperature or sub-zero temperature after optimization of the weldng parameters. The fusion zone was observed to consist mainly of martensitic phase, due to rapid quenching, while the HAZ was composed of clusters of martensite in a ferrite and bainite matrix. The base 817M40 metal remained fully ferritic after welding. The hardness was found to increase with increasing welding current. An increase in nugget size, indicating good fusion of the weld, was observed with an increase in the welding current.

Dynamic Electrode Force and Displacement in Resistance Spot Welding of Aluminum

2004 ◽  
Vol 126 (3) ◽  
pp. 605-610 ◽  
Author(s):  
C. T. Ji, ◽  
Y. Zhou,
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Welding Current ◽  
Monitoring And Control ◽  
Resistance Spot ◽  
Nugget Diameter ◽  
Electrode Force ◽  
Rate Of Increase ◽  
Process Monitoring And Control ◽  
Electrode Displacement

Dynamic electrode displacement and force were characterized during resistance spot welding of aluminum alloy 5182 sheets using a medium-frequency direct-current welder. It was found that both electrode displacement and force increased rapidly at the beginning of the welding stage and then at a reducing rate. Rates of increase in electrode displacement and force were both proportional to welding current. And both electrode displacement and force experienced a sudden drop when weld metal expulsion occurred. However, the rate of increase in electrode displacement did not reach zero during welding even for joints with sufficient nugget diameter, while electrode force peaked when a large nugget diameter was produced. Possible strategies for process monitoring and control were also discussed.

Dissimilar resistance spot welding of AISI 304 to AISI 409 stainless steels: mechanical properties and microstructural evolutions

2018 ◽  
Vol 115 (6) ◽  
pp. 610 ◽  
Author(s):  
Mehdi Safari ◽  
Hossein Mostaan ◽  
Abdoreza Ghaderi
Keyword(s):  
Stainless Steels ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Steel Sheet ◽  
Welding Current ◽  
Stainless Steel Sheet ◽  
Tensile Shear ◽  
Aisi 304 ◽  
Resistance Spot ◽  
Electrode Force

In this work, dissimilar resistance spot welding of austenitic stainless steel sheet (304 grade) and ferritic stainless steel sheet (409 grade) is studied experimentally. For this purpose, the effects of process parameters such as welding current, welding time and electrode force on tensile-shear strength of resistance spot welded joints are investigated with response surface methodology (RSM). Also, microstructural evolutions during resistance spot welding process of AISI 409 and AISI 304 stainless steels are evaluated by optical microscopy. It is concluded from results that the tensile-shear strength of spot welds is increased with increasing the welding current, welding time and electrode force. It is shown that widmanstatten ferrites have been grown in the weld metal of dissimilar resistance spot welds of AISI 304 and AISI 409 stainless steels.

Effect of Resistance Spot Welding Parameters on the Austenitic Stainless Steel 304 Grade by Using 23 Factorial Design

2011 ◽  
Vol 216 ◽  
pp. 666-670 ◽  
Author(s):  
Prachya Peasura
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Welding Process ◽  
Welding Current ◽  
Welding Time ◽  
Tensile Shear ◽  
Resistance Spot ◽  
Electrode Force

This research was study the effect of resistance spot welding process on physical properties. The specimen was austenitic stainless steel sheet of 1 mm. The experiments with 23 factorial design. The factors used in this study are welding current at 8,000 and 12,000 Amp, welding time at 8 and 12 cycle and electrode force were set at 1.5 and 2.5 kN. The welded specimens were tested by tensile shear testing according to JIS Z 3136: 1999 and macro structure testing according to JIS Z 3139: 1978. The result showed that the welding current, welding time and electrode force had interaction on tensile shear and nugget size at 95% confidential (P value < 0.05). Factors affecting the tensile shear are the most welding current of 12,000 amp., welding time of 8 cycle and electrode force of 2.5 kN. were tensile shear of 9.83 kN. The nugget size was maximum at 7.15 mm. on welding current of 12,000 amp., welding time of 12 cycle and electrode force of 1.5 kN This research can bring information to the foundation in choosing the appropriate parameters to resistance spot welding process.

Development of advanced resistance spot welding process using control of electrode force and welding current during welding

2012 ◽  
Vol 28 (1) ◽  
pp. 13-20 ◽  
Author(s):  
Rinsei Ikeda ◽  
Yasuaki Okita ◽  
Moriaki Ono ◽  
Koichi Yasuda ◽  
Toshio Terasaki
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Welding Process ◽  
Welding Current ◽  
Resistance Spot ◽  
Electrode Force

Research on Resistance Spot Welding of DP980 Dual Phase Steel

2013 ◽  
Vol 860-863 ◽  
pp. 780-783
Author(s):  
Qiao Bo Feng ◽  
Yun Feng Zhu ◽  
He Xin Zhao
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dual Phase Steel ◽  
Welding Current ◽  
High Resistivity ◽  
Dual Phase ◽  
Welding Joint ◽  
Resistance Spot ◽  
Electrode Force

The process parameters and quality of resistance spot welding for DP980 dual phase steel were studied through the orthogonal experiment method, and the influence of welding current, welding time and electrode force on the strength of welding joint has been discussed. The results show that the welding current has the greatest influence on the quality of welding joint for DP980 dual phase steel, and it needs relatively lower welding current for the DP980 dual phase steel as it has high resistivity, and appropriate increasing of electrode force is a feasible way to avoid the defect of shrinkage and it improves the joint strength.

Effect of Electrode Force on Tensile Shear and Nugget Size of Austenitic Stainless Steel Grade 304 Welds Using Resistance Spot Welding

2011 ◽  
Vol 52-54 ◽  
pp. 2176-2180
Author(s):  
Prachya Peasura
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Current Flow ◽  
Welding Current ◽  
P Value ◽  
Tensile Shear ◽  
Resistance Spot ◽  
Electrode Force

This research was to effect of electrode force on the tensile shear and nugget size of the resistance spot welding. The specimen was austenitic stainless steel 304 grade sheet metal 1.2 mm thickness. The electrode force are 1, 1.5, 2.0, 2.5, and 3.0 kN apply to the specimen. The replications in each treatment are 20 follow JIS Z 3136:1999 and JIS Z 3139:1978. Factor control, welding current 7 kA., time current flow 7 cycle and electrode tip diameter 6 mm. The welded specimens were tested by tensile shear testing according to JIS Z 3136: 1999, macro structure testing according to JIS Z 3139: 1978 and analysis results by using One-way ANOVA .The result showed that electrode force had affected on tensile shear and nugget size at 95% confidential (P value > 0.05). The low force induced the gab between specimen increasing then the current flow difficult to pass and both of gab between specimen and nugget seize had increase (Q=I2Rt). When the resistance increased so that fusion zone will have a high heating. It had affected to nugget size, heat affected zone and mechanical properties decreasing. The electrode forces are complete 2.5 kN. tensile shear 9.21 kN and nugget size 5.82 mm. The data can be applied to be used as process monitoring of resistance spot weld quality

Spot Weldability Comparison of High Strength Steel BIF340 and Normal Cold-Rolled Steel St14

2010 ◽  
Vol 154-155 ◽  
pp. 846-851
Author(s):  
Hui Liu ◽  
Yan Yu ◽  
Jun Jing He
Keyword(s):  
Welding Process ◽  
Welding Current ◽  
High Strength ◽  
Spot Weld ◽  
Resistance Spot ◽  
Fine Grained ◽  
Optimum Parameters ◽  
Electrode Force ◽  
St14 Steel ◽  
Better Than

The experimental investigation was carried out to compare resistance spot weldability of BIF340 and St14 steel in different weld processes.The spot weld microstructure and properties of two steels were analyzed.The results shown that : resistance spot weldability of BIF340 is better than St14.The optimum parameters of BIF340 were as follows: welding current was 6KA,welding time was 7 cycles, electrode force was 2800N. With the same welding process parameters, the microstructure of BIF340 spot weld was homogeneous and fine-grained, and the tensile shear strength was higher than St14.

Resistance Spot Welding between Copper Coated Steel and Aluminum Alloy

2014 ◽  
Vol 675-677 ◽  
pp. 19-22 ◽  
Author(s):  
Li Hu Cui ◽  
Ran Feng Qiu ◽  
Hong Xin Shi ◽  
Yao Min Zhu
Keyword(s):  
Aluminum Alloy ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Welding Current ◽  
Middle Layer ◽  
Welding Parameters ◽  
Coated Steel ◽  
Resistance Spot ◽  
Nugget Diameter ◽  
Electrode Force

Aluminum alloy A6061 and copper coated steel was welded by resistance spot welding with. The mechanical properties of the joint were investigated; the effects of welding parameters on nugget diameter and tensile shear load of the joints were discussed. The results show that the joint strength and nugget diameter increases with the increase of welding current and welding time and decreases with the increase of electrode force. As a result, copper plating as the middle layer of resistance spot welding is suitable for welding of aluminum alloy/steel.

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