对炮管磨损与烧蚀膛面的分析长期以来是采用普通金相法。用普通金相法已确证在炮管烧蚀膛面存在变质层,而且它的机械强度和显微组织不同于原始炮钢。一般,变质层比未变质的钢软些,具有不同的冶金组织,存在微观和宏观裂纹。 The analysis of barrel wear and ablation bores has long been a common method of metallography. It has been confirmed by conventional metallographic method that there is a metamorphic layer on the ablation bores of the barrel and that its mechanical strength and microstructure are different from that of the original gun steel. In general, the metamorphic layer is softer than the unaltered steel, with different metallurgical structures, with microscopic and macroscopic cracks.