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3. 发明公开

EP2233601A1 Carburization treatment method 有权
标题翻译：渗碳处理方法
公开(公告)号：EP2233601A1
公开(公告)日：2010-09-29
申请号：EP10007118.2
申请日：2002-05-31
申请人： Dowa Thermotech Co., Ltd.
发明人： Ebihara, Hisashi , Takahashi, Jun , Juryozawa, Hidetoshi , Abukawa, Fumitaka , Yokose, Keiji
IPC分类号： C23C8/20 , C23C8/22 , C21D1/06 , C21D1/10
CPC分类号： C21D1/10 , C21D1/06 , C23C8/20 , C23C8/22 , Y02P10/253
摘要： A carburisation treatment method comprising: introducing steel material into a transportation chamber and reducing the pressure in the transportation chamber to 0.1 kPa or lower; transporting the steel material to a carburisation chamber; elevating a pressure in the carburisation chamber by introducing N 2 gas therein and elevating a temperature in the carburisation chamber; reducing the pressure in the carburisation chamber to 0.1 kPa or lower by discharging the N 2 gas; supplying a predetermined amount of hydrocarbon gas and a predetermined amount of oxidative gas to the carburisation chamber so that the internal pressure of the carburisation chamber is 0.1 to 101 kPa, the hydrocarbon gas being at least one of gases selected from the group consisting of C 3 H 8 , C 3 H 6 , C 4 H 10 , C 2 H 2 , C 2 H 4 , C 2 H, and CH 4 ; controlling the amount of hydrocarbon gas and the amount of oxidative gas in the carburisation chamber with the internal pressure of the carburisation chamber kept at 0.1 to 101 kPa such that an atmosphere within the carburisation chamber has a high carbon potential which is below a carbon solid solubility limit; stopping the supply of hydrocarbon gas and oxidative gas and reducing the pressure in the carburisation chamber; and after a predetermined amount of time, lowering the temperature in the carburisation chamber to an oil quenching temperature, transporting the steel material to an oil quenching chamber and performing an oil quenching treatment on the steel material in the oil quenching chamber.
摘要翻译： 1.一种渗碳处理方法，其特征在于，将钢材投入搬送室内，将搬送室内的压力降低到0.1kPa以下，将钢材输送到渗碳室; 通过在其中引入N 2气体并提高渗碳室中的温度来提高渗碳室中的压力; 通过排出N 2气体使渗碳室内的压力降低至0.1kPa以下; 向所述渗碳室供给规定量的烃气体和规定量的氧化性气体，使所述渗碳室的内压为0.1〜101kPa，所述烃气体为选自C3H8， C 3 H 6，C 4 H 10，C 2 H 2，C 2 H 4，C 2 H和CH 4; 在渗碳室的内部压力保持在0.1至101kPa的情况下控制渗碳室中的烃气体量和氧化气体量，使得渗碳室内的气氛具有低于碳固体溶解度的高碳势限制; 停止提供碳氢化合物气体和氧化气体并降低渗碳室中的压力; 经过规定时间后，将渗碳室内的温度降低至油淬火温度，将钢材输送至油淬火室，对油淬火室内的钢材进行油淬火处理。

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