【Daily Topic】【Civil Engineering Version 20170613】
Thread Content
Participation reward: 2 Wealth. Correct reward: 6 Wealth. The main reason for heat cracks in steel structure welding is ( ). a. Poor crack resistance of the base material b. Low quality of welding materials c. Inappropriate selection of welding process parameters d. No preheating before welding and rapid cooling after welding e. Unreasonable design of the welded structure and improper arrangement of welds [Answer] abc
The main causes of thermal cracks in steel structure welding are (ABC). a. Poor crack resistance of the base material b. Low quality of welding materials c. Inappropriate selection of welding process parameters d. No preheating before welding and rapid cooling after welding e. Unreasonable design of the welded structure and improper arrangement of welds