Abstract

The spot weldability of high strength steel sheet and two stories galvannealed high strength steel sheet has been studied. 1) Tensile shear strength decreased inversely as welding current increased over 12KA in the case of two stories galvannealed high strength steel sheet. 2) When heat flux input over 12KA, hardening region become narrow in case of two stories galvannealed high strength steel sheet. 3) The size of hardening region affect the strength of nuggets.

Keywords

• High Strength Steel Sheet;
• Two Stories Galvannealed High Strength Steel Sheet;
• Galvannealed Steel;
• Galvanized Steel;
• Spot Welding;
• Nugget;
• Weld Time;
• Expulsion;
• Electrode Tip

• 고장력강판;
• 2층아연도금된 고장력강판;
• 갈바아닐드강;
• 갈바나이즈드강;
• 점용접;
• 용착부;
• 용접시간;
• 비산;
• 전극팁;