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1 前言氮气由于性质不活泼,广泛用于金属工业、化学工业、食品工业、电机及电子工业等各种产业领域。其制造方法都是分离我们身边存在的空气精制出来的,市场供应的氮气是用低温蒸馏制取的液氮。在热处理领域是由空气和液化天然气(LNG),液化石油气(LPO),灯用煤油等碳氢化合物燃料直接燃烧或用触媒反应生成的发生炉气作为气氛使用的。但是,确保碳氢化合物燃料的稳定供应及节约是当今世界共同的论题,并引起产业界的各个领域的重视。在热处理中,从日本的各种情况考虑,大家认为将来要转向氮基气氛热处理,这比用碳氢化合物作为主要原料的发生炉气氛热处理有许多优点。作为这种氮基气氛热处理
1 Introduction Due to the nature of nitrogen is not active, widely used in metal industry, chemical industry, food industry, electrical and electronics industries and other industries. Its manufacturing method is to separate the air around us refined, the market supply of nitrogen is obtained by cryogenic distillation of liquid nitrogen. In the field of heat treatment, it is used as an atmosphere by direct combustion of hydrocarbon fuels such as air and liquefied natural gas (LNG), liquefied petroleum gas (LPO), lamp kerosene, or the like using a furnace gas generated by a catalyst reaction. However, securing a stable supply of and saving on hydrocarbon fuels is a common issue in today’s world and attracts attention in all areas of industry. In the heat treatment, considering various situations in Japan, it is thought that there will be many advantages in heat treatment of the nitrogen-based atmosphere in the future, as compared with the heat treatment in the atmosphere of the furnace using the hydrocarbon as the main raw material. As this nitrogen-based atmosphere heat treatment