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氨燃烧气氛是以液氨为原料,与空气混合,在燃烧室中进行直接燃烧而制得的含氢量为1～20%(其余为氮气)的气氛,再经冷却和吸收,便可得到高纯度热处理可控气氛。本文介绍了5米~3/小时及20米~3/小时的氨燃烧发生器的结构、原理及试验情况。并对氨燃烧气氛的特性,气体成份的测定及控制,在氨燃烧气氛保护下零件的光亮淬火以及用氨燃烧气氛为载体气,用煤油富化进行可控碳势的气体渗碳等问题,做了一定的研究。本工作证明,这种气氛的含氢量可根据需要调整,爆炸危险性小,既可做光亮淬火、退火、正火、回火等的保护气氛,又可做渗碳的载体气。可以根据甲烷的含量进行碳势控制。这种方法给缺乏天然气和石油液化气的地区,提供了应用可控气氛的可能性。
Ammonia combustion atmosphere is liquid ammonia as raw material, mixed with air, combustion in the combustion chamber and the hydrogen content of 1 to 20% (the rest of the nitrogen) atmosphere, and then cooled and absorbed, you can get High-purity heat treatment controllable atmosphere. This paper introduces the structure, principle and test of 5m ~ 3 / h and 20m ~ 3 / h ammonia combustion generator. And the characteristics of the ammonia combustion atmosphere, the determination and control of the gas composition, the bright quenching of the parts under the protection of ammonia combustion atmosphere and the use of the ammonia combustion atmosphere as the carrier gas, the controllable carbon potential gas carburizing with kerosene enrichment and the like, Done a certain amount of research This work proves that the atmosphere of hydrogen content can be adjusted as needed, the risk of explosion is small, both light quenching, annealing, normalizing, tempering and other protective atmosphere, but also do the carburizing carrier gas. The carbon potential can be controlled according to the methane content. This method offers the possibility of a controlled atmosphere to areas lacking natural gas and liquefied petroleum gas.