C、Al、Ti对钢焊接热影响区韧性的影响

材料研究学报, 1995, 9(2): 119-124.

C、Al、Ti对钢焊接热影响区韧性的影响

中国科学院金属研究所

华南理工大学

基金项目: 国家自然科学基金

EFFECT OF C, Al AND Ti ON THE TOUGHNESS OF HAZ OF HSLA STEEL

QIAN Bainian , LI Jingli , SI Zhongyao(Institute of Metal Research , Chinese Academy of Sciences)YI Yaoyong(Huanan University ofScience and Technology)

Keywords： : microalloy element. heat affected zone (HAZ). toughness. M -A constituent , 热影响区(HAZ) , 韧性 , M-A组元

微量Al、Ti对790MPa级钢焊接HAZ的韧性有重大的影响,加入Al后,在5KJ/mm的焊接线能量下,热模拟试样的AKV(-20℃)与AKV(-40℃)分别为104J与20J与不加Al的钢相比,分别提高了4.9倍和1.6倍.Al与Ti同时加入则AKV(-20℃)与AKV(-4O℃)分别为151J和38J.如果把母材中的含C量降低到0.04%,HAZ的低温韧性得到更大的改善.本文也探讨了AIN、TiN在焊接热循环过程中的溶解与析出行为.

There is a significant effect of microalloy elements of C. Al and Ti on the HAZ toughness of 790MPa grade HSLA steel. The AKV (-20℃) and AKV(-40℃) of synthetic HAZ of Al bearing steel at 5kJ/ mm heat input are 104J and 20J respectively which are 4.9 and 1

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