TC11管内膛微弧氧化膜制备及耐烧蚀性能研究

Study on preparation of micro-arc oxide film in TC11 tube and its ablation

综合考虑TC11钛合金良好的理化性能、牵引火炮轻量化和身管内膛烧蚀磨损问题;用TC11代替传统的炮钢材料,在TC11管内膛制备微弧氧化膜。通过扫描电子显微镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)、显微硬度计和电动轮廓仪等手段分析膜层的表面形貌、元素组成、相组成、硬度和粗糙度等。以某型牵引火炮身管为实验平台,采用自行设计的烧蚀实验装置模拟发射状态下火炮身管内膛工况条件,代替传统的烧蚀方法检测微弧氧化膜的耐烧蚀磨损性能。结果表明:TC11管内膛氧化膜具有良好的微观形貌、显微硬度比基体提高3.9倍;在每次装药(七孔火药)为15g条件下,通过对比烧蚀试验烧蚀20次后测得质量损失率为0.0692%,膜层具有显著的耐烧蚀磨损性能。可以为火炮身管轻量化和内膛延寿提供一定的参考借鉴作用。

Taken into account the good physical and chemical properties of TC11 titanium alloy,traction artillery lightweight and barrel bore erosion and wear problems.TC11 was used to instead of the traditional gun steel material,the micro-arc oxidation film was prepared in TC11 tube bore.The surface morphology,elemental composition,phase composition,hardness and roughness of film were analyzed by scanning electron microscope(SEM),energy dispersive spectrometer(EDS),X-ray diffraction(XRD),microhardness tester and electric profiler.A certain type of towed barrel was used as the test platform.The self-designed ablation test device was used to simulate the condition of the inner barrel of gun barrel under fire,replacing the traditional ablation method to test the erosion and abrasion resistance of coating.The results showed that,the film in TC11 tube bore had a good micro-morphology,micro-hardness than the matrix increased by 3.9 times.Under the condition of 15 g charge per gun charge(seven hole gunpowder),the mass loss rate was 0.0692% after ablation by contrasting ablation test for 20 times,and the film had significant erosion and abrasion resistance.It can provide some reference for gun body weight control and bore longevity.