论文部分内容阅读
目的针对我厂某型号子母弹靶试时出现的弹底脱落问题,分析原因是因为阳极氧化膜不耐火药气体高温烧蚀。采取喷涂抗高温烧蚀涂料的方法,会冲刷出小孔洞。而微弧氧化作为一种直接在金属表面原位生成陶瓷层的表面强化技术,具有优异的抗烧蚀性能,100μm厚的膜层可耐2500℃的高温气流冲击,20 s不脱落。因此采用微弧氧化方式对弹底进行处理。方法以弹底作阳极,不锈钢电解槽为阴极,使用双极性交变脉冲微弧氧化电源,采用恒流方式操作。电解液配方为硅酸盐系,温度20~40℃,处理时间80~90 min。结果经过对微弧氧化膜层外观质量、厚度、附着强度、耐腐蚀性和耐烧蚀性等各项性能指标检测和靶场射击试验考核,微弧氧化膜层质量明显优于阳极氧化膜,弹底均未出现烧蚀、脱落现象,强度满足要求,高低温开舱可靠,从而证实弹底采用微弧氧化的处理方式可以抵抗火药气体的瞬间高温烧蚀作用,不会影响该子母弹的各项战技指标要求。结论弹底采用微弧氧化处理方式满足产品质量要求,可以用于批量生产。
Aim To analyze the shedding of the bottom of a certain type of ammunition target in our factory, the reason for the analysis is that the anodized film is not resistant to high temperature ablation of refractory gas. Take the method of spraying high-temperature ablative paint, will scour out a small hole. Micro-arc oxidation, as a kind of surface strengthening technology that directly generates ceramic layer directly on the metal surface, has excellent ablation resistance. The 100μm thick film can withstand the impact of high-temperature air current of 2500 ℃, and does not fall off after 20 s. Therefore, micro-arc oxidation method to deal with the bottom of the bomb. Methods The bottom of the bomb was used as the anode, the stainless steel electrolytic bath was used as the cathode, bipolar alternating pulse micro arc oxidation power was used, and constant current mode was used. Electrolyte formula for the silicate, temperature 20 ~ 40 ℃, processing time 80 ~ 90 min. Results After the coating quality and thickness, adhesion strength, corrosion resistance and ablation resistance of micro-arc oxidation coating were tested and shooting test of shooting range was carried out, the quality of micro-arc oxidation coating was better than that of anodized film and projectile End ablation, shedding phenomenon, the strength to meet the requirements, high and low temperature open reliable, confirmed that the bottom of the micro-arc oxidation treatment can be resistant to instantaneous high-temperature ablation of gunpowder gas will not affect the sub-bomb items War technical indicators required. Conclusion The bottom of the bomb using micro-arc oxidation treatment to meet product quality requirements, can be used for mass production.