Preparation of aluminum bronze rotating band for large caliber projectiles by high velocity arc spraying
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.
Aluminum bronze Rotating band Large caliber projectile High velocity arc spraying
Bin Wu Xiao-lei Chen Zhi-qiang Zou Ling-hui Fang Xu-hua Yu Jing Zheng
Army Officer Academy, 230031, Anhui Province, Hefei city, PR China 230031
国内会议
兰州
英文
1-6
2013-08-06（万方平台首次上网日期，不代表论文的发表时间）