论文部分内容阅读
气体渗碳是先进的化学热处理工艺,巳被广泛采用。但气体渗碳时間較长,生产效率低,因此我厂采用提高渗碳温度、改进渗碳剂及控制廢气閥火苗高度等办法,来縮短渗碳时間。我厂用煤油和酒精作为渗碳剂。在实际生产中証明:这样渗件表面炭黑少,渗碳速度快。現介紹于下,供参考。一、用煤油和酒精共滴法作为Ⅱ型炉渗碳剂用煤油和酒精进行共滴法渗碳。其具体操作是这样的:渗件装炉后通电升温,当溫度升至約700℃时,以20～30滴/分开始滴入酒精(C_2H_5OH),升至750～800℃时,以50～70滴/分滴入,随着温度的升高,酒精的滴入量逐一增加,当温度为850～900℃时,以90～110滴/分滴入,达到渗碳温度940℃时,开始滴入
Gas carburizing is an advanced chemical heat treatment process that has been widely adopted. However, gas carburizing longer time, low production efficiency, so I plant to increase the carburizing temperature, improve the carburizing agent and control the height of the exhaust valve flames and other ways to shorten the carburizing time. I plant with kerosene and alcohol as carburizing agent. Proved in the actual production: This seepage surface less carbon black, carburizing speed. Now introduced below, for reference. First, with kerosene and alcohol co-drop method as type Ⅱ furnace carburizing kerosene and alcohol co-drip carburizing. The specific operation is as follows: When the temperature is raised to about 700 ℃, the alcohol (C_2H_5OH) is dropped in 20 ~ 30 drops / min and the temperature rises to 750 ~ 800 ℃, 70 drops / min drop, with the increase of temperature, the amount of drops of alcohol increases one by one, when the temperature is 850 ~ 900 ℃, 90 ~ 110 drops / min, carburizing temperature reaches 940 ℃, the start Drop in