Evaluation of Cracking Resistance of Copper-Bearing Age Hardening Steel Weldment  

作　　者：CHAI Feng YANG Cai-fu SU Hang ZHANG Yong-quan XU Zhou 

机构地区：[1]School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China [2]Institute of Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China

出　　处：《Journal of Iron and Steel Research International》2007年第3期56-62,共7页

摘　　要：The weldability of a low-carbon copper-bearing age hardening steel was evaluated using cracking suscepti- bility 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 suscepti- bility 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.

关 键 词：copper-bearing age hardening steel WELDABILITY cracking resistance Y-groove cracking test 

分 类 号：TG457.11[金属学及工艺—焊接]