Acta Metall Sin  1998, Vol. 34 Issue (3): 263-270    DOI:

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EFFECT OF COOLING TIME ON CGHAZ TOUGHNESS AND MICROSTRUCTURE OF Ti MICROALLOYED STEEL

CHEN Maoai; TANG Yimin;LOU Songnian;WU Luhai; WU Renjie(College of Materials Science and Engineering; Shanghai Jiaotong University; Shanghai 200030 State Key Laboratory of Metal Matrin Composites;Shanghai Jiaotong Universityl Shanghai 200030)

CHEN Maoai; TANG Yimin;LOU Songnian;WU Luhai; WU Renjie(College of Materials Science and Engineering; Shanghai Jiaotong University; Shanghai 200030 State Key Laboratory of Metal Matrin Composites;Shanghai Jiaotong Universityl Shanghai 200030). EFFECT OF COOLING TIME ON CGHAZ TOUGHNESS AND MICROSTRUCTURE OF Ti MICROALLOYED STEEL. Acta Metall Sin, 1998, 34(3): 263-270.

Abstract References Related Articles Recommended Metrics Download:  PDF(3169KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The toughness and microstructure of CGHAZ of Ti microalloyed steel were investigated by means of OM, TEM of carbon extraction replica and metal foil, and series charpy impact testing. The results showed that with the increase of cooling time (t8/5), the austenite grain coarsening was not serious, the microstructure varied from a mixture comprised mainly of upper bainite to a mixture comprised mainly of acicular ferrite, the pearlite changed from a non-lamellar structure to a lamellar structure, and the M-A constituent changed from a elongated shape to a massive shape, therefore the toughness of CGHAZ of Ti microalloyed steel increased. It was also found that the great majority of particles in the CGHAZ are TiN, and small amount are Ti3Al, AlN and MnS. Key words:  CGHAZ      cooling time      acicular ferrite      second phase particle      Received:  18 March 1998      Service E-mail this article Add to citation manager E-mail Alert RSS Collect articles（） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1998/V34/I3/263 1 金正午, 中岛, 本键太郎,金谷 研. 铁钢, 1975; 61: 2589(Kanazawa S, Nakashima A, Okamoto K, Kanaya K. J Iron Steel Inst Jpn, 1975; 61: 2589) 2 许祖泽. 中国-瑞典冶金科技合作第二阶段共同冶金论文集. 北京: 冶金工业出版社,1990: 168(Xu Zuze. In: Proceedings for Second Perind of Sino-Swedish Joint Scientific and TechnicaI Researeh on Metallurgy, Beijing: Metullurgical Industry Press, 1990: 168) 3 Wagner C Z. Z Eektmehem, 1961; 65: 581 4 Lee J L, Wang S C, Cbeng G H. Mater Sci Technol, 1989; 5: 674 5 Bhadeshia H, Edmands D V. Acta Metall, 1980; 28: 1265 6 黑文夫, 铃木茂. 日本金属学会会报, 1991; 30: 640(Kurosawa F, Susuki S. Bull Jpn Inst Met, 1991; 30: 640) 7 Tomita Y, Osuka T. ISIJ Int, 1994; 34: 829 8 Lee J L, Pan Y T. 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