Final answer:
The travel angle in forehand welding is between 5 to 15 degrees in the direction of travel, while in backhand welding it is between 15 to 45 degrees opposite to the direction of travel.
Step-by-step explanation:
In welding, the travel angle refers to the angle at which the welding torch is held relative to the direction of welding. In forehand welding, the torch is held at an angle between 5 to 15 degrees in the direction of travel. This angle allows the weld to penetrate deeper into the base metal, resulting in stronger and more secure welds. On the other hand, in backhand welding, the torch is held at an angle between 15 to 45 degrees opposite to the direction of travel. This angle helps to protect the weld pool from excessive heat and allows for better weld bead control.