由于七十年代初的燃料危机以及1976～1977年冬的天然气危机,生产吸热式气氛的成本增加了,但是生产氮的成本增长却慢得多。因此主要生产工业用气的公司很快就意识到用氮基气氛取代发生气的良机,从而推动了这个领域,特别是用于保护气氛的迅速发展。然而,对于氮气的生产者来说,仍有一个领域是难以掌握的,这就是渗碳。最初发 Because of the fuel crisis of the early 1970s and the natural gas crisis of 1976-1977, the cost of producing an endothermic atmosphere has increased, but the cost of producing nitrogen has risen much more slowly. As a result, companies that produce mainly industrial gas quickly realized the opportunity to replace the gas generation with a nitrogen-based atmosphere, thus fueling the rapid growth of this area, especially for the protection of the atmosphere. However, one area where nitrogen producers are still hard to grasp is carburization. The first hair