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
刘栓江1，2， 刘扭参2，3， 刘忠侠2
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作者单位：（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）
中文关键字：加钛方式；A356合金；冲击韧度
英文关键字：Ti B alloying methods; A356 alloys; impact toughness
中文摘要：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。
英文摘要：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.