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The weldability of a low-carbon copper-bearing age hardening steel was evaluated using cracking susceptibility calculation,HAZ maximum hardness measurement,and Y-groove cracking evaluation test.The results show that the hardenability characteristics and cold cracking susceptibility of the steel are very low.The results also indicate that a crack-free weldment can be obtained during the welding of this type of steel even at an ambient temperature as low as-5 ℃ as well as in an absolute humidity lower than 4 000 Pa without any preheat treatment.A slight preheat treatment can prevent the joint from cracking when welding is carried out at lower ambient temperature or higher absolute humidity.
The weldability of a low-carbon copper-bearing age hardening steel was evaluated using cracking susceptibility calculation, HAZ maximum hardness measurement, and Y-groove cracking evaluation test. The results show that the hardenability characteristics and cold cracking susceptibility of the steel are very low The results also indicate that a crack-free weldment can be obtained during the welding of this type of steel even at an ambient temperature as low as-5 ° C as well as an absolute humidity lower than 4 000 Pa without any preheat treatment. A slight preheat treatment can prevent the joint from cracking when welding is carried out at lower ambient temperature or higher absolute humidity.