Method for welding stud to high-nitrogen stainless steel

Abstract

The invention provides a method for welding a stud to high-nitrogen stainless steel. The method solves the problems that at present, conventional manual electric arc welding is large in operation difficulty; the welding quality is instable; forming is poor; welding strength is low; and the efficiency is low. The stud is made of austenitic stainless steel; a circular cone head of 120 degrees to 150 degrees is arranged on the welding end face; the welding current A ranges from 850 A to 2200 A; the welding time T ranges from 350 ms to 1000 ms; and the extending amount P ranges from 3 mm to 5 mm; the lifting amount L ranges from 2.5 mm to 3.5 mm. According to parameters, an accessory base is welded to the middle and high nitrogen stainless steel in a stud welding manner. Through adoption of austenitic stainless steel stud materials and selection of welding process parameters, the effects that when the stud is welded to the high-nitrogen stainless steel, the welding quality is stable, the welding line strength is high, and the efficiency is high are achieved; the stud welding manner adopts to welding of the high-nitrogen stainless steel of the medium and high strength; forming is attractive, the welding line strength is large; welding plate deformation is small; and the welding efficiency is greatly improved.

Description

technical field [0001] The invention relates to a stud welding method, which is suitable for stud welding on high-nitrogen stainless steel. Background technique [0002] High nitrogen stainless steel (N% ≥ 0.6, σ b ≥1000MPa, referred to as high-nitrogen steel) has the characteristics of high strength and high toughness, and has better ballistic resistance than the currently used protective materials. The lightweight development of vehicles plays an important role and can be used in new armor equipment in the future. [0003] Due to the particularity of high-nitrogen steel, nitrogen pores and nitrogen escape are prone to appear in the weld zone during the conventional arc fusion welding process between the stud and the high-nitrogen stainless steel plate. High nitrogen steel has good performance due to the higher nitrogen content, and the loss of nitrogen in the weld zone reduces the solid solution nitrogen content in the weld, resulting in a decline in joint performance. ...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and process suitable for stud welding on medium-high-strength high-nitrogen stainless steel, which solves the problems of difficulty in conventional manual arc welding operations, unstable welding quality, poor forming, and low weld seam strength. The problem of inefficiency