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本文根据痕迹形成的理论基础,通过大量的实验,并在立体显微镜及比对显微镜下对85式7.62mm狙击步枪射击弹头上的线膛痕迹进行了细致的观察、测量与统计,并对该痕迹的形成机理及影响因素进行了全面分析,从而对线膛痕迹的稳定性及检验鉴定价值进行了论证。对能否利用线膛痕迹认定枪支进行了研究。其中本文针对线膛痕迹进行了深入细致的研究。研究发现线膛痕迹中的膛线痕迹数量、倾斜方向、角度宽度均可作为区分枪种的重要依据;通过对同一支85式狙击步枪发射子弹的弹头痕迹线条的对接,可以认定该组弹头为同一支枪发射,即可认定发射枪支。
In this paper, based on the theoretical basis of trace formation, through a large number of experiments, and under the stereomicroscope and the comparison microscope, the detailed observation, measurement and statistics of the trace on the 85 7.62mm sniper rifle firing warhead were carried out. Formation mechanism and influencing factors were analyzed comprehensively, and the stability of line trace and the value of inspection and verification were demonstrated. The feasibility of identifying firearms using trace of the hearth was studied. In this paper, a detailed study of the hearth traces. It is found that the number of rifling marks, the inclination direction and the width of the rifles in the rifling marks can be used as the important basis for distinguishing gun types. The warheads of the same 85-type sniper rifle firing projectile can be regarded as the same branch Gun launch, you can determine the launch firearm.