摘要
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．
here 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. 6 times of that of steel without any microalloy element. With both Al and Ti addition. AKV(-20℃) and AKV(-40℃) are 151J and 38J at heat input of 5kJ / mm. The toughness of HAZ can be further improved if C content is reduced to 0.04%. The dissolve and reprecipitation behavior of AIN and TiN during welding were studied also.
出处
《材料研究学报》
EI
CAS
CSCD
1995年第2期119-124,共6页
Chinese Journal of Materials Research
基金
国家自然科学基金
关键词
微合金元素
热影响区
韧性
钢
焊接
碳
铝
钛
icroalloy element. heat affected zone (HAZ). toughness. M -A constituent
