GC-4超高强钢焊接冷裂倾向的评价

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GC-4超高强钢焊接冷裂倾向的评价

杨元修, 杨汉祥

南昌航空学院

收稿日期:1986-07-16 修回日期:1900-01-01 出版日期:1987-06-25 发布日期:1987-06-25

EVALUATION OF THE TENDENCY TO COLD CRACKING IN WELDING GC-4 SUPERHIGH STRENGTH STEEL

Yang Yuanxiu, Yang Hanxiang

Nangchang Aeronautical Institute

Received:1986-07-16 Revised:1900-01-01 Online:1987-06-25 Published:1987-06-25

摘要/Abstract

摘要： GC-4钢是我国自行研制的一种无Ni低Cr超高强钢,主要用它取代30CrMnSiNi2A钢制造飞机起落架等受力构件。但由于该钢种含碳量高,合金元素多,冷裂倾向较大,使其应用受到限制,因此探明该钢种的冷裂倾向。制定一套合理的焊接工艺,防止冷裂纹的产生。

Abstract: The influence of preheating temperature,post-heating temperature and welding line energy on the tendency to cold cracking in welding GC-4 steel is investigated with implant test method and the highest hardness method.The microstruc-ture and fracture morpholgy in HAZ of the weld is observed with an electron microscope.It was proved that the influence of post-heating temperature is most significant.With a 300℃ preheating and a 350℃ post-heating, twinning Marten-site can restrained ,ocr can reach a high value of 1500 MPa,and cold cracking can be prevented.

杨元修;杨汉祥. GC-4超高强钢焊接冷裂倾向的评价[J]. 航空学报, 1987, 6(6): 314-320.

Yang Yuanxiu;Yang Hanxiang. EVALUATION OF THE TENDENCY TO COLD CRACKING IN WELDING GC-4 SUPERHIGH STRENGTH STEEL[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 1987, 6(6): 314-320.

E-mail：hkxb@buaa.edu.cn

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GC-4超高强钢焊接冷裂倾向的评价

EVALUATION OF THE TENDENCY TO COLD CRACKING IN WELDING GC-4 SUPERHIGH STRENGTH STEEL

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