0
During weld pool solidification , impurities like sulfur get cooler at lower temp than surrounding weld hence due solidification of sulfur there is crack observed.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What is Limitation of gas welding?
what are gas welding limitation
What is the difference between arc welding and resistance welding?
in arc welding only heat is used to weld metal. but in resistance welding pressure will also be used along with heat.
What are welding sparks called?
The 'welding sparks' that come off during welding are metal particles from the filler metal, electrode, or base metal that are lost during welding. The standard term is spatter.
Definition of argon welding?
A.K.A. Gas Metal Arc Welding -- Semi-automatic or automatic arc welding process in which a continuous and consumable wire electrode and a shielding gas are fed through a welding gun.
Explain the principle behind arc welding.?
Arc welding uses an electrical current to create enough heat to melt metal. Any type of welding that uses an electric arc is technically arc welding. However, most people use the term 'arc welding' to mean shielded metal arc welding (SMAW), or 'stick welding'. SMAW, MIG, and flux core wire welding use the filler metal as both electrode and filler; TIG welding uses an electric arc to heat the base metal and a separate filler rod to add metal to the weld.
Why welders use welding torch not the flame of firewood in welding?
Welding involves melting metal. Wood flames don't get hot enough.
How is oxygen used used in welding?
Oxygen is used to produce hot flame which is used in welding purpose
Are fumes from hot plate welding of polypropylene toxic?
yes
What is red-shortness in steel?
is the steel which breaks as it's heated to red hot
Can you use LPG for ARC welding?
ARC welding uses large amounts of electricity to melt the metal, not a hot flame. So no, LPG cannot be used for ARC welding.
Are fumes from hot plate welding of plastics harmful?
They can be depending on the material you are welding. Most hot plate welders have a ventilation system that will evacuate fumes from the inside of the welder. This greatly reduces the risk to the operator.
What are welding goggles?
Welding Goggles are goggles you wear when you are welding something to protect your eyes and around your eyes from sparks and tiny hot metal peices that can burn your eye. They are mainly for safety. Hope I helped@
How do you control hot shortness?
The main reason of hot sortness is sulphur in steel. Therefore, answer of control of hot sortness is to control the sulphur in liquid steel before casting
What has the author H Tjokrohartono written?
H. Tjokrohartono has written: 'The hot-shortness of nickels and nickel alloys'
What causes welding hose to be charred?
Laying on hot metal, or having slag fall on it.
When forge welding is the metal molten?
No, it is just beyond red hot. Almost in a plastic state.
Do you need a hot work permit with cad welding?
Yes I do, since I am currently residing Fiji.
