Al-Si-P master alloy and its modification and refinement performance on Al-Si alloys

作者：Zuo Min; Liu Xiangfa^*; Dai Hongshang; Liu Xiangjun

来源：Rare Metals, 2009, 28(4): 412-417.

DOI：10.1007/s12598-009-0080-9

• Al-Si alloys
• Al-Si-P master alloy
• primary Si
• P recovery
• modification
• refinement

An Al-Si-P master alloy has been developed by an in-situ reaction and the electron probe microanalyzer (EPMA) results show that there are many pre-formed AlP particles contained in the master alloy. Silicon introduced into the system plays an important role in remarkably improving the distribution and content of AlP particles due to their similar crystal structure and lattice parameters. ZL109 alloys have shown fast modification response to the addition of 0.5% Al-15Si-3.5P master alloy at 720A degrees C, with a mass of primary Si precipitating in size of about 15 mu m. Also, coarse primary Si grains in Al-30Si alloy can be refined dramatically from 150 mu m to 37 mu m after the addition of 2.0% Al-15Si-3.5P master alloy at 850A degrees C. The P recovery of the Al-15Si-3.5P master alloy is much higher than that of a Cu-8.5P master alloy due to the pre-formed AlP particles.

• 出版日期2009-8
• 单位山东大学