Al-Ti-C-B细化剂对A356铝合金组织和性能的影响  

Influence of Al-Ti-C-B Refiner on the Properties and Microstructure of A356 Alloy

作　　者：张将[1] 彭银江[1] 朱鸿磊 洪晓露[1] 徐英[1] 刘永强 陈大辉[1] 侯林冲[1] Zhang Jiang;Peng Yinjiang;Zhu Honglei;Hong Xiaolu;Xu Ying;Liu Yongqiang;Chen Dahui;Hou Linchong(Ningbo Branch of China Academy of Ordnance Science)

机构地区：[1]中国兵器科学研究院宁波分院

出　　处：《特种铸造及有色合金》2021年第11期1416-1419,共4页Special Casting & Nonferrous Alloys

基　　金：宁波市重大2025专项资助项目(2019B10099)。

摘　　要：通过添加Al-Ti-C-B细化剂,研究了Ti、C、B元素对A356合金中α-Al相及力学性能的影响。结果表明,A356合金中加入Al-Ti-C-B能显著细化α-Al枝晶尺寸至150μm以下,微观组织更加均匀,且细化剂最佳添加量为1.0%(质量分数,下同),合金的抗拉强度为320.8 MPa,伸长率为10.0%。进一步研究表明,Al-Ti-C-B中间合金中含有TCB粒子,能够作为初生α-Al的有效形核质点,从而对A356合金具有高效、长效、稳定的细化效果。The effects of Al-Ti-C-B master alloy on microstructure and mechanical properties of A356 alloy were investigated.The results indicate that the addition of AlTiCB to A356 alloy can significantly refine the α-Al dendrite,and the grain size can be refined to less than 150 μm.The microstructure becomes more uniform,and the desirable addition amount of trace element AlTiCB is 1.0%,where tensile strength and elongation of the alloy reaches the highest value of 320.8 MPa and 10.0%.The TCB particles existing in the Al-TCB seed alloy play a role of the effective nucleation particle of the primary α-Al,contributing to efficient,long-lasting and stable refining effect on A356 alloy.

关 键 词：AlTiCB A356铝合金 微量元素 

分 类 号：TG146.21[一般工业技术—材料科学与工程]