在实验室条件下模拟了烘烤硬化钢450℃下热镀锌镀层的合金化退火过程，研究镀层锌铁合金相的形成和?涔獭⒍撇阆嘟峁购投撇愕目狗刍阅埽⒏隽怂玫难芯糠椒ê椭饕芯拷峁Ｑ芯勘砻鳎憾撇阍?50℃合金化退火，当保温时间延长到60~120s时，镀层内的δ相将会分为δ1k相和δ1p相两层，而且随时间延长，δ1k相增厚、δ1p相减薄，同时镀层表面柱状ζ相也有所减少，镀层抗粉化性能相应变差。
The galvannealing of hot-dip galvanized bake-hardenable steel at 450℃ was simulated in laboratory. The formation and evolution of Zn-Fe alloy phase, coating phase structure and coating′s powdering resistance were studied. The results show that the δ phase in the coating will divide into δ1k phase and δ1p phase, when the steel sheets are galvannealed at 450℃ and the holding time is delayed to 60-120s. Furthermore, the thickness of δ1k phase coating becomes higher with the time increasing, the thickness of δ1p phase coating becomes lower and the number of columnar ζ phase in the coating surface becomes less. At the same time, the coating′s powdering resistance becomes worse.
参考文献
| [1] | |
| [2] | Lin C S, Meshii M, Cheng C C. Phase evolution during galvanneal process[A], Proc. 3th Int. Conf. on Zinc and Zinc Alloy Coated Steel Sheet (Galvatech’95) [C], Chicago, Illinois, USA, 1995, 485-495.[2]Lin C S, Meshii M and Cheng C C. Phase evolutlon in galvanneal coatings on steel sheets[J], ISIJ International, 1995, 35 (5): 503-511.[3]McDevitt E T, Meshii M. Electron microscopy study of the microstructural evolution in the early stages of galvannealing[A], Zinc-Based Steel Coating Systems: Production and Performance[C], San Antonio, TX, US, 1998, 127-136.[4]Nakamori T and Shibuya A. Effects of galvannealing conditions and coating weight on powdering resistance of galvannealed steel sheet[A], Corrosion-Resistant Automotive Sheet Steels[C], Chicago, Illinois, USA, 1988, 139-149.[5]Hisamatsu Y. Science and technology of zinc and zinc alloy coated steel sheet[A], Proc. of the 1st. Int. Conf. on Zinc and Zinc Alloy Coated Steel Sheet (Galvatech ’89) [C], ISIJ, Tokyo, Japan, 1989, 3-12.[6]Urai M, Terada M, Yamaguchi M and Nomura S. Effect of aluminum on powdering characteristics of galvannealed steel sheet[A], Proc. of the 1st Int. Conf. on Zinc and Zinc Alloy Coated Steel Sheet (Galvatech ’89) [C], ISIJ, Tokyo, Japan, 1989, 478-484.[7]Sagiyama M, Inagaki J I and Morita M. Fe-Zn alloying behavior and the coating microstructure of galvannealed steel sheets[J], NKK Technical Review, 1991, (63): 38-45.[8]Yasuda A, Koumura H, Yamato K, Onizawa K and Ota H. Development of high performance galvannealed steel sheet for outer panels of automotives[A], Corrosion-Resistant Automotive Sheet Steels[C], Chicago, Illinois, USA, 1988, 24-30.[9]L’Ecuyer J D, Cheng C C, Rangarajan V and Franks L L. Microstructural effects in the formability of galvanneal coatings[A], EPD Congress 1992 [C], San Diego, California, USA, 1992, 1307-1322. [10]Chang S, Choi Y M, Yoo B H and Bae D C. Behavior of galvannealed coatings on various sheet steels[A], Surface Modification Technologies Ⅵ[C], Chicago, Illinois, USA, 1992, 429-445.[11]Jordan C E, Goggins K M and Marder A R. Interfacial layer development in hot-dip galvanneal coatings on Interstitial free (IF) steel[J], Metallurgical and Materials Transaction A, 1994, 25A(10): 2101-2109.[12]Sakurai M, Zhang L W, Tajiri Y and Kondo T. Effect of coating structure on powdering resistance of galvannealed steel sheet[J], Tetsu-to-Hagane, 1991, 77(7): 978-986.[13]Lin C S and Meshii M. Effect of steel chemistry on the microstructure and mechanical properties of the commercial galvanneal coatings[A], Proc. of the 3th Int. Conf. on Zinc and Zinc Alloy Coated Steel Sheet (Galvatech’95) [C], Chicago, Illinois, USA, 1995, 477-484.[14]Hong M H, Kim J S and Chung J H. Effect of Al content in Zn bath and galvannealing temperature on the microstructure of GA sheet steel[J], Journal of the Korean Institute of Metals and Materials, 2001, 39(11): 1263-1269.[15]张理扬，李俊，张红，等.合金化热镀锌镀层相结构的研究方法[J]，物理测试，2007，25（5）：31-36.[16]Lin C S and Meshii M. The effect of steel chemistry on the formation of Fe-Zn intermetallic compounds of galvanneal-coated steel sheet[J], Metallurgical and Materials Transactions B, 1994, 25B(10): 721-730.[17]Andoh A, Uchida J, Entani H, Kato C, Kuroda H, Satou T, Shimizu M, Fujita S, Miyasaka A, Morimoto Y and Yamashita M. Recent advance in coated steel sheets[J], Tetsu-to-Hagane, 2003, 89(1): 3-17.[18]孙振岩,刘春明.合金中的扩散与相变[M],沈阳:东北大学出版社,2002,1.[19]李见.材料科学基础[M],北京:冶金工业出版社,2000,347-349. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%