|
|
|
| MORPHOLOGY AND PHASE TRANSFORMATION OF GRANULAR BAINITE AND GRANULAR STRUCTURE |
| by FANG Hongsheng; BAI Bingzhe; ZHENG Xiuhua; ZHENG Yankang; CHEN Xiuyun; ZHAO Rufa (Tsinghua University; Beijing) (Manuscript received 8 August; 1984; revised manuscript 27 June; 1985) |
|
Cite this article:
by FANG Hongsheng; BAI Bingzhe; ZHENG Xiuhua; ZHENG Yankang; CHEN Xiuyun; ZHAO Rufa (Tsinghua University; Beijing) (Manuscript received 8 August; 1984; revised manuscript 27 June; 1985). MORPHOLOGY AND PHASE TRANSFORMATION OF GRANULAR BAINITE AND GRANULAR STRUCTURE. Acta Metall Sin, 1986, 22(4): 5-142.
|
|
|
Abstract Study was made of the microstructural morphology and phase transformation mechanism of the "ferrite+islands" formed either as granular bainite in upper region of temperature range of bainitic transformation or as so called "granular structure" in temperature range of pro-eutectoid transformation in the low carbon alloy steels. The granular bainite stands out in surface relief during its transformation Its ferrite grows up longitudinally and form parallel laths The K-S orientation relationship is kept between ferrite and austenite The morphology of its islands appears as the shape of short lath and with a tendency of being parallelly distributed in the bainite-ferrite matrix. The granular structure does not stand out in surface relief in the formation of equiaxial ferrite. It's ferrite can grow across the grain boundary of parent phase, and has no strict orientation relationship with parent phase The shape of the islands is irregular, and its arrangement on the matrix is also irregular. The grain boundary of austenite couldn't be revealed clearly Except the difference of the transformation temperature, the granular structure possessed Widmanstatten ferrite is similar to the granular bainite in characteristics. Finally, the models of the growth of granular bainite and granular structure are suggested.
|
|
Received: 18 April 1986
|
1 Habraken, L.J., Rev. Metall., (Paris), 53 (1956) , 30．
2 Hehemann, R.F., Phase Transformations, ASM, Metals Park, Ohio, 1970, p. 397．
3 Hehemann, R.F. Kinsman, K.R.; Aaronson, H.I., Metall. Trans., 3 (1972) , 1077．
4 Dunlop, G.L.; Honeycombe, R.W.K., Met. Sci., 10 (1976) , 124．
5 Habraken, L.J.; Economopoulos, M., Transformation and Hardenability in Steers. Symposium
sponsored by Climax Molybdenum Company of Michigan, CMCM, 1967, p. 69．
6 康沫狂;管敦惠;郭成道;朱金荣,理化检验(物理分册),(1979) ,№5,1．
7 西安交通大学,未公开发表资料,1918．
8 王英姝;艾宝瑞;马国潜;王健生;邓星临,金属学报,15(1979) ,456．
9 Magnee, A.; Drapier, J.M.; Dumont, J.; Coutsouradis, d.; Habraken, L., Cobalt-Containing High-Strength Steels, Cobalt Monograph Series, Centre d'Information du Cobalt, Brussels, 1974, p. 4．
10 李朋兴,江伯鸿,潘素红;陆兴荣理化检验(物理分册),(1979) ,№5,12．
11 方鸿生;白秉哲;邓海金;赵如发;邓燕康,金属热处理学报,3(1982) ,№2,76．
12 Jones, G.J.; Trivedi, R.K., J. Appl Phys., 42 (1971) , 4299．
13 Kinsman, K.R.; Eichen, E.; Aaronson, H.I., Metall. Trans., 6A (1975) , 303．
14 徐祖耀,顾文桂;俞学节,金属学报,19(1983) ,A12．
15 Aaronson, H.I.; Laird, C.; Kinsman, K.R., Phase Transformations, ASM, Metals Park, Ohio, 1970, p. 313．2 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
