Manufacture of Al-Ti-B grain refiner by reaction of complex halide salts with molten aluminum in B2O3 alternative KBF4

doi:10.13373/j.cnki.cjrm.2016.02.015

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Manufacture of Al-Ti-B grain refiner by reaction of complex halide salts with molten aluminum in B2O3 alternative KBF4
	Ren, Jun 1; Tao, Qingui 1; Ma, Ying 2
刊名	Xiyou Jinshu/Chinese Journal of Rare Metals
	2016-02-01
卷号	40 期号:2 页码:188-192
关键词	Additives Efficiency Fluorine compounds Grain refinement Grain size and shape Refining Salts Textures Titanium alloys Al-Ti-B Al-Ti-B grain refiners Almost consistent Cost of productions Equiaxed structures Fluoride emissions Grain refining efficiency Strength and plasticities
ISSN号	02587076
DOI	10.13373/j.cnki.cjrm.2016.02.015
英文摘要	Grain refinement was one of the means of increasing strength and plasticity of aluminum alloy and improving quality of castings. Currently, the grain refinement of aluminum alloys mainly depended on the Al-Ti-B alloy ternary system, which added Al-Ti-B grain refiner robs into molten aluminum in the reaction of complex halide salts to refine α-Al and obtain a uniform, fine and equiaxed structure. However, the mixed malts of the method, KBF4 and K2TiF6, particularly KBF4, greatly increased the cost of production, caused more fluoride emissions and needed troublesome residue treatment process. Besides, it was difficult to compensate the heat loss of the reaction-self from the exothermic reaction of the molten aluminum. Therefore, it was a direction to find a more economical and efficient compound which could replace KBF4 salt for manufacturing high quality Al-Ti-B grain refiner. The experiment showed that KBF4 was completely replaced by B2O3 during the complex halide salts with molten aluminum to prepare Al-Ti-B grain refiner, which could not only reduce the refiner performance and produce a large amount of residue, but also decrease the fluidity of the molten aluminum and lead to more difficulty to the casting process. With premixing B2O3 and deslagging agent and then adding K2TiF6 to the molten aluminum, the microstructure and refine efficiency of aluminum alloy would be significantly improved without considering the loss of additives. When each of B2O3 and KBF4 was added by 50%, the recovery rate of Ti and the grain refiner efficiency of aluminum alloy were almost consistent with the case that only KBF4 was added. Therefore, we concluded that B2O3 could be used to replace KBF4 only partially but not completely on the premise that grain refining efficiency was not taken into consideration. This method could produce lower fluoride emissions and particulates additive. Moreover, B content that provided by B2O3 was nearly 4 times higher, and the additive of this method was cheaper than other additives in the same mass. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.
语种	中文
出版者	Editorial Office of Chinese Journal of Rare Metals
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113067]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
作者单位	1.Key Laboratory of Computational Physics, Yibin University, Yibin; 644007, China; 2.State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Ren, Jun,Tao, Qingui,Ma, Ying. Manufacture of Al-Ti-B grain refiner by reaction of complex halide salts with molten aluminum in B2O3 alternative KBF4[J]. Xiyou Jinshu/Chinese Journal of Rare Metals,2016,40(2):188-192.
APA	Ren, Jun,Tao, Qingui,&Ma, Ying.(2016).Manufacture of Al-Ti-B grain refiner by reaction of complex halide salts with molten aluminum in B2O3 alternative KBF4.Xiyou Jinshu/Chinese Journal of Rare Metals,40(2),188-192.
MLA	Ren, Jun,et al."Manufacture of Al-Ti-B grain refiner by reaction of complex halide salts with molten aluminum in B2O3 alternative KBF4".Xiyou Jinshu/Chinese Journal of Rare Metals 40.2(2016):188-192.