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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1987, Vol. 6 ›› Issue (6): 314-320.
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Yang Yuanxiu, Yang Hanxiang
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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.
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.
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