G.F. Zhou
,
M. B. Wen
,
P. H. Li and X. L. He 1) National Enterprise Technology Center
,
Wuhan Iron & Steel Group Co.
,
Wuhan 430080
,
China 2) University of Science and Technology Beijing
,
Beijing 100083
,
China
金属学报(英文版)
The stress relaxation curves of Ultra-Low Carbon Bainitic(ULCB) steels with different Cu and B contents were measured by using Gleeble-1500 dynamic thermal-mechanical simulator. The results show that Cu and B added can accelerate the strain-induced precipitation reaction, and the effect of Cu and B is even more obvious with Cu and B combined addition or Cu content increased. The TEM analysis of precipitate engendered at the temperature of 850℃ C indicate that Nb(C,N) precipitate nucleates dominantly on the dislocation line, and grows with holding time extended while the precipitate particle size increases from 5 nm to 17 nm.
关键词:
stress relaxation
,
null
,
null
