烟火切割热力学分析及药剂配方设计与实验

从传热学和力学两方面分析了烟火切割的理论基础,重点分析了影响烟火切割效果的主要因素的原因和解决方法.考虑价格和毒性因素,应用化学热力学理论计算了烟火药的绝热反应温度,筛选出了放热充足的铝热剂.实验观察了铝热剂的燃烧,确定了适于烟火切割的两种铝热剂为由氧化铜组成的铜铝热剂和由三氧化二铁组成的铁铝热剂.通过均匀配方设计实验...

Thermo Dynamic Analysis,Composition Design and Experimental Study on Metal-Cutting Pyrotechnic Composition

The theory of pyrotechnic cutting was analyzed by heat transfer theory and mechanics, the reason and solution of the main influencing factor of pyrotechnic cutting effect were studied. Considering both price and toxicity, and the adiabatic reaction temperature of pyrotechnics was calculated by chemical thermodynamics, the thermites with adequate heat were screen out. By experimental observation of the combustion of thermites, two kinds of thermites that are appropriate for pyrotechnic cutting were determined, which are cupric thermite and ferric thermite. By uniform designed experiments, the good formula of pyrotechnics that is used for melting metal material was obtained. Which is composed of ferric thermite 30%~50%, cupric thermite 30%~50% and other thermite 10%~20%. The pyrotechnics can generate high temperature and high speed melting jet of Cu-Fe alloy, which can cut metal material effectively.