在井式气体渗碳炉装入工件后，需边加热边排气，尽快将氧化性气氛排除，使炉气变成具有一定碳势的渗碳性气氛。生产上，常用肉眼观察法或气体分析法来判断排气阶段是否结束。作者在生产实践中，找到一种更为简捷的新方法——铁丝检验法，此法优于上述两种方法，现分述如下... After the well-type gas carburizing furnace is loaded with the workpiece, it is necessary to exhaust the gas while heating to eliminate the oxidizing atmosphere as soon as possible, so that the furnace gas becomes a carburizing atmosphere with a certain carbon potential. Production, the commonly used visual observation or gas analysis to determine whether the exhaust phase is over. Author in the production practice, find a more simple and new method - wire test method, this method is superior to the above two methods, are as follows ...