SIMULATION AND OPTIMIZATION OF THERMAL FIELD DURING CONTINUOUS CONSTRAINED RHEO-ROLLING OF AZ31 ALLOY

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	SIMULATION AND OPTIMIZATION OF THERMAL FIELD DURING CONTINUOUS CONSTRAINED RHEO-ROLLING OF AZ31 ALLOY
	Guan Renguo; Zhang Qiusheng; Dai Chunguang; Zhao Zhanyong; Liu Chunming
刊名	ACTA METALLURGICA SINICA
	2011
卷号	47 期号:9 页码:1167-1173
关键词	NUMERICAL-SIMULATION MODEL AZ31 Mg-alloy semisolid constrained rheo-rolling numerical simulation temperature
ISSN号	0412-1961
其他题名	SIMULATION AND OPTIMIZATION OF THERMAL FIELD DURING CONTINUOUS CONSTRAINED RHEOROLLING OF AZ31 ALLOY
英文摘要	Semisolid 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.
语种	英语
CSCD记录号	CSCD:4390392
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/142537]
专题	金属研究所_中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 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.