球形Ti-6Al-4V粉末的爆炸压实  

Explosive Compaction of Ti-6Al-4V Spherical Powders

作　　者：汪洋[1] 

机构地区：[1]西北有色金属研究院,宝鸡721014

出　　处：《稀有金属材料与工程》1992年第3期59-66,共8页Rare Metal Materials and Engineering

摘　　要：采用同轴心双管式爆炸压实装置,选择TNT炸药,对PREP球形Ti-6Al-4V粉末进行了爆炸压实试验。研究了样品压实密度与压实参数E/M值(炸药量/粉末量)之间的关系。对样品作了金相和断口SEM观察及维氏硬度测试。结果表明,球形粉末在爆炸冲击波作用下相互间结合成一体,其最高压实密度达99.5%T.D.;其压实密度与E/M值呈抛物线关系;球形粉末经压实作用变成多面体形;高E/M时,粉粒边界出现不连续的熔化区,该熔化区在快冷后形成细晶,使得其硬度(Hv560)比粉粒的(Hv440)要高;由于冲击波掠过粉粒产生的硬化效应,以致于粉粒硬度由Hv382增加到Hv440;中、高E/M值时,粉粒之间也存在爆炸焊接特有的波状结合形式。The explosive compaction test of PREP Ti-6Al-4V spherical powder was performed on a two coaxial steel-tube set up and TNT charges were used. The relationship between compactness and compacting factory (E/M value) was studied. The microstructure and fracture of the simples were observed by SEM. Microhardness(Hv) of simples were examined. The research results show that spherical powders are compacted to a block under impact wave. The max impactness reaches 99.5 % T. D., which shows the relation of parabola with E/M value. The spherical powder particles change into polyhadres after compaction. When E/M is high, the discontinuous melting zones occur on partical boundares, which form fine grains caused by rapid solidification, thus the microhardness (Hv 560) is higher than that of the particles(Hv 440). Harding effect of shock were results in an increase of microhardness of the powder particles from Hv 382 to Hv440. The form of wave bonding peculiar to explosive welding also exists between interparticles.

关 键 词：球形粉末 爆炸压实 钛合金 

分 类 号：TG146.23[一般工业技术—材料科学与工程]