Preparation of aluminum bronze rotating band for large caliber projectiles by high velocity arc spra

• 作 者: BinWu;Xiao-leiChen;Zhi-qiangZou;Ling-huiFang;Xu-huaYu;JingZheng;
• 机 构: Army Officer Academy, 230031, Anhui Province, Hefei city, PR China 230031
• 出 处: 第十一届摩擦学大会
• 发表日期: 2013年期

　　In this paper,aluminum bronze coatings were fabricated by high velocity arc spraying (HVAS) technique.Microstructure and microharhness of the prepared coatings were investigated.Ring-on-disc dry sliding wear tests were conducted in an ambient condition to examine the tribological behavior of the coatings.Quasi-static engraving processes of rotating bands made of as-sprayed aluminum bronze coating and bulk copper were studied by using rate-controlled push test methodology on an MTS 810 Material Testing System.The results show that the as-sprayed aluminum bronze coatings have dense microstructure with porosity of about 1.6 %.Meanwhile,the as-sprayed coating presents a higher microhardness than pure copper.The friction coefficient of coatings is about 0.2-0.3 in steady state.Tribological mechanisms of the as-sprayed coatings were discussed.The engraving test results show that aluminum bronze rotating band presents high bonding strength and good plasticity.The HVAS aluminum bronze coating should be a possible substitution for the state of the art copper rotating band.