加Ti、B方式对A356合金冲击韧度的影响  

Effect of Adding Ti,B Methods on Impact Toughness of A356 Alloy

作　　者：刘栓江[1,2] 刘扭参[2,3] 刘忠侠[2] 

机构地区：[1]安阳工学院数理系,河南安阳455000 [2]郑州大学物理工程学院材料物理教育部重点实验室,河南郑州450052 [3]河南工程学院数理科学系,河南郑州450007

出　　处：《热加工工艺》2009年第19期64-67,共4页Hot Working Technology

摘　　要：通过对比实验研究了在相同Ti含量和相同Ti、B质量比时,加Ti、B方式对A356合金冲击韧度的影响。结果表明:Ti、B加入的方式对A356合金冲击韧度的影响明显,采用电解加钛进行细化的A356合金微观组织较细,冲击韧度最高;虽然电解加钛+Al-B细化方式合金的冲击韧度与其它两种钛、硼联合细化方式差别较小,但由于具有高的裂纹扩展功,因此具有较高的断裂抗力。Using the same mass ratio of Ti and B and the same titanium content, the impact toughness of A356 alloys produced by different Ti and B alloying methods were investigated. The results show that the Ti, B alloying methods have an obvious effect on the microstructure and impact toughness of A356 alloys; the A356 alloys produced by electrolytic low-titanium aluminium alloys have the optimum grain refinement effect and impact toughness; though the impact toughness of A356 alloys refined with electrolytic low-titanium aluminium alloys＋Al-B master alloys almost has the same values as that alloys alloyed with melting Al-Ti-B master alloys and melting K2TiF6＋KBF4, the former alloys have the higher fracture resistance than the latter alloys because of the former alloys having higher crack propagation energy.

关 键 词：加钛方式 A356合金 冲击韧度 

分 类 号：TG146.2[一般工业技术—材料科学与工程]