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What Defects Can Appear in High-Strength Steel Welding of Flange Nuts with an Energy-Storage Spot Welder?
Oct 13,2026
In high-strength steel flange-nut projection welding, high-strength steel is hard and prone to quenching-hardening cracking. The energy-storage spot welder releases concentrated heat instantaneously during welding, making various welding defects easy to occur in production.
I Process Characteristics of High-Strength Steel Welding of Flange Nuts
1.High-strength steel hardens easily after welding, and the heat-affected zone may crack
2.Energy-storage welding releases a large current instantaneously with concentrated heat, with high risks of spatter and workpiece overheating
3.The fit and positioning precision of the flange nut and plate are demanding
II Common Welding Defects
1.Cold joints, insufficient welding strength
2.Spatter, plate-surface ablation pits
3.Nut offset and misalignment, flange deformation and skewing
4.Thread damage
5.Cracking of the high-strength steel base material
III Defect Control and Rectification Solutions
1.Rationally debug the energy-storage welding parameters
2.Control pressure and positioning tooling
3.Do good thread protection
4.Incoming-material and surface control
Wuxi Haifei Intelligent Equipment Co., Ltd. https://www.haifeiwelder.com/
Wuxi Haifei Intelligent Equipment Co., Ltd. has been focusing on the R&D and production of spot‑welding machines for 17 years. The company has obtained ISO9001 Quality Management System Certification, China Compulsory Certification (3C) and CE Certification. It is a National High‑tech Enterprise, a Specialized, Refined, Differential and Innovative Enterprise of Jiangsu Province, a Specialized, Refined, Differential and Innovative Enterprise of Wuxi, and a Gazelle Enterprise in the Southern Jiangsu National Self‑Dependent Innovation Demonstration Zone.
Should you be interested in our spot‑welding machines, please contact us: 400‑0510‑750.
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Wuxi HAIFEI Intelligent Equipment Co., Ltd.
Wuxi HAIFEI Welding Equipment Co., Ltd.
Add: 28 Shuiyun Road, Yuecheng, Jiangyin, Jiangsu Province, China. (Postal Code: 214404)
Mobile: +86 18915302352
Email: wushijie@jshaifei.com