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1.引言在丙烷、空气和氮气所合成的渗碳气氛的应用中,要涉及到炉内气氛反应的动力学问题本文以吸热式发生气氛与甲醇、氮气和丙烷添加气所制备的气氛作对比,描叙试验的一些结果。 2.试验试验用一台在保护气氛条件下进行工作的多用炉。按照标准,此炉由一个吸热气氛发生装置供应气体。标准载体气的流量大约是4米~2/小时.碳势由一个用CO_2红外分析仪自动调节。本试验用“合成的”载体气代替过去的载体气,其组份是丙烷,空气和不同量的氮气,或者由甲醇与氮气组成。后者当甲醇在进入炉子以前就已经气化了。本试验所用的氮以液氮方式供给。气体成份用色谱法分析。用0.1毫米的箔片测定碳势,用直径
1. INTRODUCTION In the application of carburizing atmosphere synthesized by propane, air and nitrogen, it is necessary to deal with the kinetics of the reaction in the furnace. In this paper, the atmosphere prepared by the combination of endothermic atmosphere and methanol, nitrogen and propane Contrast, describe some of the results of the test. 2. Experimental Test A multi-purpose furnace is used which operates under a protective atmosphere. By standard, the furnace is supplied with gas by a heat generating atmosphere generator. The standard carrier gas flow rate is about 4 meters ~ 2 / hour carbon potential by a CO_2 infrared analyzer automatically adjusts. In this experiment, a “synthetic” carrier gas was used instead of the carrier gas of the past, which consisted of propane, air and various amounts of nitrogen, or methanol and nitrogen. The latter is gasified before it enters the furnace. Nitrogen used in this test is supplied as liquid nitrogen. Gas composition is analyzed by chromatography. The carbon potential is measured with a 0.1 mm foil using a diameter