易碎钨合金穿甲弹芯的注射成形研究

对采用注射成形工艺得到的Φ22.5 mm的易碎钨合金弹芯进行了研究,注射成形工艺为混炼、注射、溶剂脱脂、热脱脂、烧结等。结果表明:180℃×2 h的混炼工艺所得的喂料均匀,注射成形的最佳温度为180～200℃;在30～45℃条件下的溶剂脱脂一般不会产生溶胀、开裂等缺陷,溶剂脱脂24 h后,脱脂率大于40%;注射试样在溶剂脱脂后形成了连通孔道;热脱脂以5℃/min快速升温;采用二步法烧结,减少了变形,提高产品的致密度。

Injection molding process of fragile tungsten alloys penetrator

Injection molding process was studied for Φ22.5 mm fragile tungsten alloys penetrator,including mixing,injection,solvent debinding,thermal debinding and sintering.As a result,feedstocks were mixed for 2 hours at 180 ℃,the optimum injection molding temperature was between 180 ℃ and 200 ℃;the molded product was subjected to solvent debinding for 24 hours at 30～45 ℃,no defect was found in the molded product,and the debinding ratio was up to 40%;when pore was formed in the molded product,the molded part should be heated at a heat-up rate of 5 ℃/min,and was sintered by two-step method which reduced to distortion and the density of obtained sampes was improved.