Accelerated Gas Carburizing (URX Gas Carburizing)
来源期刊：材料热处理学报2004年第5期
论文作者：Hiroyuki Nakatsu Mamoru Kamitani Yoshikazu Shimosato
关键词：gas carburizing; accelerated gas carburizing; internal oxidation; reaction rate coefficient and mass flow rate;
摘 要：URX gas carburizing is an accelerated gas carburizing method with 50% CO + 50% H2 gas which comes from CH4 gas + CO2 gas. By using this gas composition, the carburizing reaction rate increases to the maximum and the controllability of carbon potential improves. A carbon mass flow rate is the product of the carburizing reaction rate multiplied by the difference of carbon percent between carbon potential of the gas and the carbon content of the surface of treated steel parts. We have obtained excellent results from the experimental tests at our laboratory as mentioned bellow. 1)Carburizing time can be shortened by 40% for 0.5 - 0.9 mm effective case depth. 2) Uniform carburizing case depth 3) Less internal oxidation with the same case depth. We have already developed the new roller hearth type continuous carburizing furnace and the new URX gas generator.
Hiroyuki Nakatsu1，Mamoru Kamitani1，Yoshikazu Shimosato1
(1.Chugai Ro Co., Ltd., Osaka, Japan)
摘要:URX gas carburizing is an accelerated gas carburizing method with 50% CO + 50% H2 gas which comes from CH4 gas + CO2 gas. By using this gas composition, the carburizing reaction rate increases to the maximum and the controllability of carbon potential improves. A carbon mass flow rate is the product of the carburizing reaction rate multiplied by the difference of carbon percent between carbon potential of the gas and the carbon content of the surface of treated steel parts. We have obtained excellent results from the experimental tests at our laboratory as mentioned bellow. 1)Carburizing time can be shortened by 40% for 0.5 - 0.9 mm effective case depth. 2) Uniform carburizing case depth 3) Less internal oxidation with the same case depth. We have already developed the new roller hearth type continuous carburizing furnace and the new URX gas generator.
关键词:gas carburizing; accelerated gas carburizing; internal oxidation; reaction rate coefficient and mass flow rate;
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