High current produces more heat. Current is defined as charges per unit area. More current means more number of electrons per unit area. When you weld at high current, more number of charges cross across the filler metal and base metal. Due to high resistance of air between electrode and base metal, the kinetic energy of charges converted into heat energy and metal melts. More the number of charges per unit area means higher the temperature.
Voltage means force acting on electrons moving from point to point. Whenever the voltage is high, electrons moves at greater speed. Transformers increases or decreases the speed of electrons. When you weld, metals melt due to high current(produces high temprature). If the voltage is very high molten particles moves at greater speed during transfer of filler metal and hence the metal will flow erratically and so it will not properly flow towards the base metals to weld.
12 сен 2024
