铸造铝硅合金熔炼过程中Ca含量的变化规律*

doi:10.11896/j.issn.1005-023X.2017.010.019

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (1142KB)
Export: BibTeX | EndNote (RIS)

Abstract The influence of temperature and time on variational principle of Ca content in A356 recycled scrap during melting process was investigated. The results indicated that the variations of Ca content showed conic laws which kept decreasing gradually with the holding time. The change rates of Ca content increased linearly at low temperature and decreased linearly at high temperature. With the melting temperature increasing, the decrease rates of Ca content sped up and the Ca content reached the lowest value (6×10-6) within 3 hours at 760 ℃。By thermodynamic and kinetic analysis, we learned Ca content was reduced mainly by oxidation in first stage and deoxidizing Al2O3 through diffusion to the melt surface lately. The reaction started with alumina would be shorter when the temperature was improved. The oxidation rate of Ca changes with temperature, which meet the law of K=578 749exp[-176 500/(RT)] in the early melting process at 660-720 ℃.

Key words： Ca content melting temperature holding time thermodynamics dynamics

Published: Online: 2018-05-08

CLC number:

TF801.3

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	AO Xiaohui
	XING Shuming
	YU Baishui
	ZHANG Jiahong
	GUO Qiang
	WANG Rufen

Cite this article:

AO Xiaohui,XING Shuming,YU Baishui, et al. Variational Principle of Ca Content in Cast Al-Si Alloy During Melting Process[J]. Materials Reports, 2017, 31(10): 92-95.

URL:

https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.010.019 OR https://www.mater-rep.com/EN/Y2017/V31/I10/92

1 Eva Sevigné-Itoiz, Carles M Gasola, Joan Rieradevalla, et al.Environmental consequences of recycling aluminum old scrap in a global market[J].Resour Conservat Recycl,2014,89:94.
2 Morris A.Improving thermal efficiency in aluminum scrap melting[J].Ind Heating,2014,82(2):41.
3 Margalit J,et al.Sorting it out [handheld XRF technology in aluminum scrap recycling][J].Recycl Today,2012,50(8):86.
4 Kevorkijan V.The recycling of standard quality wrought aluminum alloys from low-grade contaminated scrap[J].JOM,2010,62(8):37.
5 Lee G C, Kim M G, Park J P, et al.Iron removal in aluminum melts containing scrap by electromagnetic stirring[C]//Materials Science Forum.Berlin,2010.
6 Gabrielle Gaustada,Elsa Olivetti,Randolph Kirchainb,et al.Improving aluminum recycling.A survey of sorting and impurity removal technologies[J].Resour Conservat Recycl,2012,58:79.
7 Mu?iz Rodrigo,Flores Alfredo,Ortiz Juan,et al.Characterization by EBSD of antimony-calcium rich phases formed during purification of aluminum scrap[J].J Wuhan University of Technology-Mater,2013,28(4):647.
8 Hiraki Takehito,Miki Takahiro,Nakajima Kenichi,et al.Thermodynamic analysis for the refining ability of salt flux for aluminum recycling[J].Materials,2014,7(8):5543.
9 Qiao Jinguo,Liu Xiangfa,Liu Xiangjun,et al.Relationship between microstructures and contents of Ca/P in near-eutectic Al-Si piston alloys[J].Mater Lett,2005,59:1790.
10 Anyalebechi P N.Effects of hydrogen,solidification rate,and Ca on porosity formation in as-cast aluminum alloy A356[C]//United states,TMS Light Metals.San Diego,2003.
11 Wang Cuiling,Zhou Dan.Influence of calcium content in Al alloy on piston quality[J].Foundry,2011,60(10):1019(in Chinese).
王翠玲,周丹.铝合金中的钙含量对活塞品质的影响[J].铸造,2011,60(10):1019.
12 Kobayashi T,Niinomi M,Yamaoka M,et al.Effects of Fe and Ca on fracture characteristics of various aluminum casting alloys[J].J Japan Inst Light Met,1993,43(11):581.
13 Yang Guojun,Yu Haijun,Yao Guangchun,et al.Influence of metallic Ca on the Viscosity of closed-cell aluminum foam[M]//Warrendale:Minerals,Metals and Materials Society,2007.
14 Kim H J,Kobayashi T,Ito T.Effects of Fe and Ca on usual and impact fatigue characteristics of AC2B-T6 aluminum casting alloys[J].Mater Sci Forum,1996,217-222:1395.
15 Khaleghifar F,Raiszadeh R,Doostmohammadi H.Effect of Ca on the behavior of double oxide film defects in commercially pure aluminum melt[J].Metall Mater Trans B,2015,46B:1044.
16 Zheng Yajie,Chen Kunkun.Selective leaching Se from selenium residue by Na2SO3 solutions and leaching kinetics[J].Chinese J Nonferrous Met,2012,22(2):585(in Chinese).
郑雅杰,陈昆昆.采用Na2SO3溶液从硒渣中选择性浸出Se及其动力学[J].中国有色金属学报,2012,22(2):585.