why are some copper alloy cutting tips chrome plated
MY question is (WHAT IS DOWNHILL WELDING) The correct term is Down Hand Welding. Most welds in the vertical position are made from bottom to top. Down Hand means welding from the top to bottom. These welds are usually made on thin metal as the heat input is lower, thereby reducing penetration/burn thru.
There are several websites that give the essentials and tips about steel welding. Lots of practice is needed on the job though to improve your skills.
burns and cancer for the most part
Space Welding. Yes they have welders in space!
Gas Metal Arc Welding Most folks call it MIG
Copper and brass
There are a few commonly used welding process. The top used are shielded metal and arc welding.
how are steel chains made
Rivetting, welding, folding, bolting, clipping, glueing.
If you are referring to the small unusable piece of welding rod that is left after welding, most call it a electrode stub.
Spot welding is known as resistance welding because the the two pieces of metal melt together at the point of highest resistance to current flow, basically when the electricity flows through the pieces it heats up at the point of highest resistance that is where where the metal pieces touch and in a direct line from the two contact tips on the spot welder. Simple!