会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 91. 发明授权
    • 금속침탄방법
    • KR100432956B1
    • 2004-11-03
    • KR1019960075271
    • 1996-12-28
    • 도와 홀딩스 가부시키가이샤
    • 키와무라토시유키고이히토시아부카와후미타카
    • C23C8/08
    • C23C8/22
    • In a cementation method of metals according to the present invention wherein hydrocarbon gas and oxidization gas are introduced into a heat treatment furnace, a small quantity of hydrocarbon gas of a low pressure is introduced into the heat treatment furnace. The shift time and the gradient of the carbon potential varying toward a predetermined high or low level are controlled by increasing or decreasing the quantity of cementation gas and oxidization gas to be supplied to the furnace. After the carbon potential is reached to the high or low level the carbon potential is maintained for a predetermined time of period so as to prevent the deposited carbide from being bulked. In order to prevent the gas supply pipe (17) from being choked with the soot of the hydrocarbon, oxidization gas of intermediate pressure is flushed into the gas supply pipe (17). In order to prevent the components of the atmosphere in the furnace from being varied due to the change in furnace pressure when the door (16) is opened or closed, hydrocarbon gas of a low pressure and oxidization gas of an intermediate pressure are added in the conversion pipe in the preheating zone. CO2 of intermediate pressure is supplied into each gas supply pipe (17) at the same time in order to remove the soot in each of the gas supply pipes (17) and to prevent the lack of CO to be introduced into the furnace.
    • 在将烃气体和氧化气体引入热处理炉的本发明金属胶结方法中,将少量低压烃气引入热处理炉。 通过增加或减少提供给炉的渗透气体和氧化气体的量来控制向预定的高或低水平变化的碳势的转变时间和梯度。 碳势达到高或低水平后,将碳势保持预定的时间段,以防止沉积的碳化物膨胀。 为了防止气体供应管17被碳氢化合物的烟灰堵塞,中间压力的氧化气体被冲入气体供应管17中。 为了防止在门(16)打开或关闭时由于炉内压力的变化而导致炉内气氛的成分发生变化,低压的碳氢化合物气体和中等压力的氧化气体被添加到 预热区内的换热管。 为了除去每个气体供给管(17)中的烟灰并且防止CO不能引入炉内,中间压力的CO2同时供给到每个气体供给管(17)中。 <图像>