摘要
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。
Objective Targeting at the shedding problem of projectile base of a type of shrapnel in our factory during test, the cause for which was revealed through analysis to be the low resistance of the anode oxidation film against the high-temperature gunpowder gas ablation. Adoption of the method of spraying high-temperature ablative resistant coating led to erosion of small holes. In contrast, micro-arc oxidation, as a surface strengthening technology that directly produces ceramic layer on the surface of the metal, has excellent resistance to erosion, 100 μm thick film can resist impacting of 2500 ℃ high temperature air, and does not fall off after 20 seconds. Therefore, the method of micro-arc oxidation was used to dispose the projectile base. Methods With elastic bottom as the anode, stainless steel electrolytic cell as the cathode, bipolar micro-arc al-ternating pulse oxidation power supply and constant current were used. Formula of electrolyte was phosphate system electrolyte, with temperature of 20 ℃ to 40 ℃ and processing time of 80 min ~ 90 min. Results After detection of specifications indexes of the micro-arc oxidation coating, such as appearance quality, thickness, adhesion strength, corrosion resistance and erosion resistance and assessment of shooting range test, the quality of micro-arc oxide film layer was obviously better than that of the anode oxide film, the projectile base did not show ablation and falling off phenomena, the strength met the requirements, and the high and low temperature tank was reliable, which confirmed processing of projectile base using micro-arc oxidation could resist the instantaneous high temperature erosion effect of gunpowder gas, without affecting the tactical and technical index requirements of shrapnel. Conclusion Processing of projectile base using micro-arc oxidation met the quality requirements of the product, and it could be used in mass production.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2016年第6期167-172,共6页
Surface Technology
关键词
超硬铝合
微弧氧化
抗烧蚀性能
表面强化
工艺规范
性能检测
superhard aluminum alloy
micro-arc oxidation
ablation resistance
surface strengthening
process specification
performance testing
