Ti-6Al-4V合金喂料临界粉末装载量的研究
Research on Critical Powder Loading for Ti-6Al-4V Alloy Feedstocks
王家惠
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作者单位:云南昆明理工大学城市学院
中文关键字:粉末注射成形; 钛合金;临界粉末装载量;流变特性
英文关键字: powder injection molding, titanium alloy, critical powder loading;rheological property
中文摘要:本文研究了4种不同蜡基粘结剂配方下钛合金喂料的临界固体粉末含量,并测试了临界固体粉末含量下喂料的流变学参数。实验结果表明:1#喂料(100%PW)、2#喂料(95%PW+5%SA)、3#喂料(70%PW+25%LDPE+5%SA)、4#喂料(60%PW+35%LDPE+5%SA)的临界粉末装载量分别为:70vol.%,71.53 vol.%,72.24 vol.%,73.02 vol.%;经流变学分析,临界粉末装载量下喂料仍呈假塑性流体,但其流动指数n值较小,在0.2以下,不利于成形。
英文摘要:This paper investigated the critical powder loading of Ti-6Al-4V alloy feedstocks with four different wax-based binders, and rheological measurements of feedstocks at critical powder loading were performed in a capillary rheometer. The results showed that the critical powder loadings of 1# feedstock(100%PW), 2# feedstock(95%PW+5%SA), 3# feedstock(70%PW+25%LDPE+5%SA), 4# feedstock(70%PW+25%LDPE+5%SA) was 70vol%,71.53 vol%,72.24 vol%,73.02 vol%, respectively. Through rheological analysis, we finded that the feedstocks at critical powder loading were pseudo plastic fluid, but flow index of feedstocks was lower than 0.2, not conducive to forming.