炉气氛准平衡状态和碳势的控制精度(重点讨论直接裂解式)

• 作 者: 宋子濂
• 机 构: 铁道部科学研究院金属和化学研究所,
• 出 处: 金属热处理
• 发表日期: 1987年08期
• 关键词: 碳势控制 渗碳剂 渗碳气氛 间断采样 自动控制过程 准平衡过程 化学反应方程式 控制仪 信号采样 计算公式

在可控渗碳中,以化学反应方程式为理论根据的计算公式,它的前提条件是化学反应在平衡状态下进行。但在实际渗碳过程中,渗碳炉中的反应永远是不平衡的。然而我们通过特殊的自动控制过程(具有双因素信号、高灵敏度和间断采样的功能)和设法减少炉内渗碳气氛的损失。使炉内的化学反应尽可能地趋向于准平衡状态,就可以得到满意的碳势控制曲线,提高碳势控制精度并有效地防止系统失控。

In controllable carburizing, based on the chemical reaction equation theory formula, the precondition is that the chemical reaction is carried out at equilibrium. However, in the actual carburizing process, carburizing furnace reaction is always unbalanced. However, we have tried to reduce the loss of carburizing atmosphere in the furnace through a special automatic control process (with two-factor signals, high sensitivity and intermittent sampling). So that the chemical reactions in the furnace tend to quasi-equilibrium as much as possible, we can get a satisfactory carbon potential control curve, improve the carbon potential control accuracy and effectively prevent the system from running out of control.