论文部分内容阅读
文献报导铝对真空熔化法测定金属中的氮有严重影响.实践证明钛、铬对测定的影响也不能忽视.采用脉冲加热法测定,这些影响虽有所改善,但并未完全消除.众所周知,镍基合金多半含有一定量的铝和钛,并且含有大量的铬,采用真空熔化法或脉冲加热法测定镍基合金中的氮是困难的.由于镍基合金成份复杂,含有氮化钛等多种难溶氮化物,采用化学法测定氮也有一定困难.不论采用盐酸或硫酸溶样速度都很缓慢,采用传统的硫酸和硫酸氢钾高温分解难溶氮化物,其操作也
It has been reported in the literature that aluminum has a serious impact on the determination of nitrogen in the metal by the vacuum melting method. It has been proved that the influence of titanium and chromium on the determination can not be neglected. Although these effects are improved but not completely eliminated by the pulse heating method, Nickel-based alloys contain a certain amount of aluminum and titanium, and contain a lot of chromium, vacuum melting method or pulsed heating method is difficult to determine the nitrogen in the nickel-based alloy.Because the composition of the nickel-based alloy is complex and contains more titanium nitride Kind of insoluble nitrogen, the chemical determination of nitrogen is also a certain difficulty.Whether using hydrochloric acid or sulfuric acid sample speed is very slow, the use of traditional sulfuric acid and potassium bisulfate pyrolysis of insoluble nitrogen, its operation is also