新型Al-P-N晶种合金及其对过共晶Al-Si系合金组织和性能的影响
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摘要
研究了Al-P-N晶种合金及其对过Al-Si合金组织和性能的影响。结果表明:AlP和AlN粒子在Al-P-N晶种合金中形成,AlN粒子存在于AlP粒子的周围,因此抑制了AlP粒子的长大,使AlP得到了细化。与Al-P合金相比,Al-P-N合金中AlP粒子数目多、尺寸小,从而提高了Al-Si熔体对P的吸收率。过共晶Al-Si合金经Al-P-N合金细化,可以减少P的添加量达到与Al-P合金相同的细化效果,且室温极限拉伸性能得到显著提高。在提高P吸收率的基础上,提出了Al-Si熔体中AlN粒子对P原子的吸附模型。
Al-P-N seed crystal alloy and its effect on the microstructure and properties of Al-Si alloys have been investigated in this work. The results showed that AlP and AlN particles formed in the Al-P-N crystal seed alloy, and the AlN particles grew around AlP particles which were greatly refined by the addition of AlN.As compared with Al-P alloy, the reduced size and increased number of AlP particles in the Al-P-N alloy improved the absorption rate of P in the Al-Si alloy. The Al-Si alloy could be refined by less phosphorus addition by using Al-P-N alloy, and the tensile strength at room temperature was significantly improved.Based on the improvement of absorption rate, a absorption model of AlN particles absorption P atomic in AlSi melt was established.
Al-P-N seed crystal alloy and its effect on the microstructure and properties of Al-Si alloys have been investigated in this work. The results showed that AlP and AlN particles formed in the Al-P-N crystal seed alloy, and the AlN particles grew around AlP particles which were greatly refined by the addition of AlN.As compared with Al-P alloy, the reduced size and increased number of AlP particles in the Al-P-N alloy improved the absorption rate of P in the Al-Si alloy. The Al-Si alloy could be refined by less phosphorus addition by using Al-P-N alloy, and the tensile strength at room temperature was significantly improved.Based on the improvement of absorption rate, a absorption model of AlN particles absorption P atomic in AlSi melt was established.
引文
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[2]LI J H,ZARIF M Z,ALBU M,et al. Nucleation kinetics of entrained eutectic Si in Al-5Si alloys[J]. Acta Materialia,2014,72:80-98.
[3]WU Yaping,WANG Shujun,LI Hui,et al. A new technique to modify hypereutectic Al-24%Si alloys by a Si-P master alloy[J]. Journal of Alloys and Compounds,2009,477:139-144.
[4]SAMUEL E,GOLBAHAR B,SAMUEL A M,et al,Effect of grain refiner on the tensile and impact properties of Al-Si-Mg cast alloys[J].Materials&design,2014,56:468-479.
[5]LIU Xiaorui,ZHANG Yudong,BEAUSIR Benoit,et al. Twin-controlled growth of eutectic Si in unmodified and Sr-modified Al-12.7%Si alloys investigated by SEM/EBSD[J]. Acta Materialia,2015,97:338-347.
[6]张俊红,任智森,赵群,等.变质工艺影响过共晶Al-Si合金初晶硅细化的研究[J].轻合金,2006(10):62-65.
[7]王杰芳,谢敬佩,刘忠侠,等.国内外铝硅活塞合金的研究及应用述评[J].铸造,2005,51(1):24-27.
[8]Haque M M,Sharif A. Study on wear properties of aluminium-silicon piston alloy[J]. Journal of Materials Processing Technology,2001,118:69-73.
[9]STERNER-RAINER R. Aluminium silicon alloy with a phosphorus content of 0.001 to 0.1%[P]. US Patent,No. 1940922,1933.
[10]FARAJI M,TODD I,JONES H. Effect of solidification cooling rate and phosphorus inoculation on number per unit volume of primary silicon particles in hypereutectic aluminium-silicon alloys[J]. Journal of Materials Science,2005,40:6363-6365.
[11]KYFFIN W J,RAINFORTH W M,JONES H. Effect of phosphorus additions on the spacing between primary silicon particles in a Bridgman solidified hypereutectic Al-Si alloy[J]. Journal of Materials Science,2001,36:2667-2672.
[12]姚书芳,毛卫民,赵爱民,等.过共晶铝硅合金细化变质剂的研究[J].特种铸造及有色合金,2000(5):1-3.
[13]ZUO Min,LIU Xiangfa,SUN Qianqian. Effects of processing parameters on the refinement of primary Si in A390 alloys with a new AlSi-P master alloy[J]. Journal of Materials Science,2009,44:1952-1958.
[14]ZHANG Henghua,DUAN Haili,SHAO Guangjie,et al. Microstructure and mechanical properties of hypereutectic Al-Si alloy modified with Cu-P[J]. Rare Metals,2008,27:59-63.
[15]齐广慧,刘相法,冷严,等.变形处理Al-P中间合金对Al-Si合金变质作用的影响[J].铸造,2001 50(11):658-661.
[16]朱向镇. Al-Si-X-P熔体中Al-P团簇演变行为与化学稳定性的研究[D].济南:山东大学,2016.
[17]LIU S D,ZHOU X Y,WU W K,et al. Moleccular dynamics study on the nucleation of Al-Si melts on sheet substrates at the nanoscale[J].Nanoscale,2016(8):4520-4528.
[18]GAO T,ZHU X Z,QIAO H,et al. A new Al-Fe-P master alloy designed for application in low pressure casting and its refinement performance on primary Si in A390 alloy at low temperature[J]. Journal of Alloys and Compounds,2014,607:11-15.
[19]QIAO Huan,ZHU Xiangzhen,GAO Tong,et al. Influence of deformation on the microstructure and low-temperature refining behavior of Al-3.5P master alloy[J]. Journal of Materrals Science&Technology,2015,31:391-396.
[20]ZHU X Z,JIANG W,LI M R,et al. The effect of Mg adding order on the liquid structure and solidified microstructure of the Al-Si-Mg-P alloy:an experiment and ab Initio study[J]. Metals,2015,5:40-51.
[21]蔡厚道.稀土元素Nd变质对ZL101铝合金的显微组织与力学性能的影响[J].铸造,2015,64(6):499-503.