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SIMULATION AND OPTIMIZATION OF THERMAL FIELD DURING CONTINUOUS CONSTRAINED RHEO-ROLLING OF AZ31 ALLOY
Alternative TitleSIMULATION AND OPTIMIZATION OF THERMAL FIELD DURING CONTINUOUS CONSTRAINED RHEOROLLING OF AZ31 ALLOY
Guan Renguo; Zhang Qiusheng; Dai Chunguang; Zhao Zhanyong; Liu Chunming
2011
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume47Issue:9Pages:1167-1173
AbstractSemisolid metal processing (SSP) is recognized as a new near-shape forming technology, which combines the merits of both the liquid and the solid metal processing. Compared with the traditional rolling process, this technology has the features of low energy consumption, low cost equipment and high yield. Perhaps inevitably, a problem is the solid and liquid phases tend to separate with each other during rheo-rolling process, especially when the semisolid slurry has a low solid fraction. This problem causes macrosegregation and reduces the quality of the strip. Using rectangular groove roller may solve this problem. In this paper, numerical simulation method and experiment were combined for simulation and optimization of thermal field during continuous constrained rheo-rolling of AZ31 alloy. The results show that on the sloping plate surface, alloy temperature decreases gradually from the casting mouth to the exit with a linear pattern, the alloy temperature near the sloping plate surface is lower than that on the above surface, when the casting temperature is higher than 690 degrees C, the melt temperature at the exit of the plate is higher than the liquidus of AZ31 alloy, which will cause product fracture. In the backward slip zone, semisolid metal deformation mainly happens, alloy temperature decreases gradually from the entrance to the exit of the roll gap, semisolid zone length increases with the casting temperature, isothermal lines have twice buckling, the buckling direction on the surface of the alloy is toward the exit of the roll gap, while the buckling direction in the center is toward the entrance of the roll gap, and their bending degree increases gradually from neutral flow plane to the entrance of the roll gap. In the forward slip zone, solid metal deformation mainly takes place, isothermal lines have once buckling, and the buckling direction is toward the exit of the gap. Under the current experimental conditions, the proper casting temperature between 670 and 690 degrees C is suggested.
KeywordNUMERICAL-SIMULATION MODEL AZ31 Mg-alloy semisolid constrained rheo-rolling numerical simulation temperature
Indexed ByCSCD
Language英语
CSCD IDCSCD:4390392
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/142535
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
Guan Renguo,Zhang Qiusheng,Dai Chunguang,et al. SIMULATION AND OPTIMIZATION OF THERMAL FIELD DURING CONTINUOUS CONSTRAINED RHEO-ROLLING OF AZ31 ALLOY[J]. ACTA METALLURGICA SINICA,2011,47(9):1167-1173.
APA Guan Renguo,Zhang Qiusheng,Dai Chunguang,Zhao Zhanyong,&Liu Chunming.(2011).SIMULATION AND OPTIMIZATION OF THERMAL FIELD DURING CONTINUOUS CONSTRAINED RHEO-ROLLING OF AZ31 ALLOY.ACTA METALLURGICA SINICA,47(9),1167-1173.
MLA Guan Renguo,et al."SIMULATION AND OPTIMIZATION OF THERMAL FIELD DURING CONTINUOUS CONSTRAINED RHEO-ROLLING OF AZ31 ALLOY".ACTA METALLURGICA SINICA 47.9(2011):1167-1173.
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