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研究了不同含钛量(分别为0 07%Ti、0 13%Ti、0 19%Ti)的原位钛合金化A356合金的微观组织和力学性能,并与相应含钛量熔配加钛A356合金进行了对比,发现原位钛合金化A356合金的二次枝晶臂间距小于熔配加钛合金,随着钛含量增加二次枝晶臂减小且趋势相同。较低钛含量原位钛合金化合金综合力学性能优于熔配加钛合金,但钛含量较高时两种合金的性能差别变小,甚至低于熔配加钛合金,原因在于较高钛含量的原位钛合金化合金中较高的铁含量严重降低了合金的塑性。
The microstructure and mechanical properties of in-situ titanium alloy A356 with different contents of Ti (0 07% Ti, 0 13% Ti and 0 19% Ti, respectively) were investigated and compared with the corresponding Ti content A356 The results show that the secondary dendritic arm spacing of the in-situ titanium alloy A356 alloy is smaller than that of the molten alloy plus titanium alloy. The secondary dendrite arm decreases and the same trend with the increase of titanium content. The lower titanium content of in situ titanium alloy mechanical properties better than melting with titanium alloy, but the higher the titanium content of the performance difference between the two alloys become smaller, or even lower than the melting with titanium alloy, because of the higher titanium The higher content of iron in the in situ titanium alloy significantly reduces the plasticity of the alloy.