不同直径螺柱下的拉弧螺柱焊工艺优化及接头组织性能分析

戴忠晨; 葛怀普; 金文涛; 火巧英; 于泽州

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不同直径螺柱下的拉弧螺柱焊工艺优化及接头组织性能分析
Draw-arc stud welding process optimization of different stud diameter and analysis of properties and microstructure of welding joint
2018年48卷第10期页码：82-85
DOI：

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戴忠晨, 葛怀普, 金文涛, 等. 不同直径螺柱下的拉弧螺柱焊工艺优化及接头组织性能分析[J]. 电焊机, 2018,48(10):82-85.

WEI Zhongchen, GE Huaipu, JIN Wentao, et al. Draw-arc stud welding process optimization of different stud diameter and analysis of properties and microstructure of welding joint[J]. 2018,48(10):82-85.
戴忠晨, 葛怀普, 金文涛, 等. 不同直径螺柱下的拉弧螺柱焊工艺优化及接头组织性能分析[J]. 电焊机, 2018,48(10):82-85. DOI：

WEI Zhongchen, GE Huaipu, JIN Wentao, et al. Draw-arc stud welding process optimization of different stud diameter and analysis of properties and microstructure of welding joint[J]. 2018,48(10):82-85. DOI：

摘要

以316不锈钢为基板材料,采用直径M6、M8不锈钢螺柱进行焊接,研究螺柱直径对316不锈钢拉弧螺柱焊工艺及接头组织性能的影响。结果表明,随着螺柱直径的增大,所需的较优焊接时间相应延长,且优化的可调焊接时间范围变窄。M8较优的焊接时间为68 ms,较M6长8 ms,M6优化的可调焊接时间范围为52～60 ms,M8的范围为64～68 ms。随着螺柱直径的增大,焊接难度变大,焊后接头成形及力学性能变差,在相应较优参数下,M8焊缝柱状晶长大明显,宽长比变小。M6在未出现裂纹时的最大弯曲角度可达75°,M8最高达到66°。

Abstract

Taking 316 stainless steel as the base material,and the diameter of M6 and M8 stainless steel studs was used for welding.The influence of the diameter of the stud on the welding process of 316 stainless steel draw-arc stud and the microstructure of the joint was studied. The results show that the optimum welding time was extended and the adjustable range of optimum welding time narrowed with the increase of the diameter of the stud. The optimum welding time of M8 stud was 68 ms compared with M6 which was only 60 ms.The optimization welding time of M6 stud could be adjusted in the range of 52～60 ms while the M8 one was in the range of 64～68 ms.At the case of the corresponding optimum parameters,the columnar crystals significantly grew and ratio of width to length become small.Besides,the maximum bending angle of M6 could reach up to 75° before the crack appeared while M8 one was only 66°.