Low carbon steel true heat treatment furnace

In the process of low carbon production vacuum furnace steel, early stage is the most difficult to control the process of decarburization and postal rapid aluminum deoxygenation and alloying. China vacuum furnace, by optimizing decarburization process, the stability of the equipment performance under the premise of summarizing and analyzing the carbon and oxygen utilization, and the yields of aluminium deoxidizing and alloying, found some empirical formula, vacuum time is greatly reduced, production speed, improve the quality of the products.

Vacuum furnace production technology of ultra low carbon steel converter oxygen and molten steel temperature measuring temperature sample 7 minutes gently – – – oxygen for 8 minutes deep temperature oxygen decarburization process – sample – adding aluminium deoxidizing and alloying and cycle sampling network after 3 minutes after five minutes of tapping cycle – > – > temperature of oxygen.

It is difficult to control in the process, have two aspects, first, how to carbon and a minimum of 15 minutes, the second, how to 15 minutes after the remnants of oxygen content in liquid steel decarburization aluminum one-time add in place, can make the aluminum deoxidation, and ensure the aluminum alloy. In this way, it can fit between 25 and 30 minutes. Otherwise, the vacuum time is greatly extended.

In the process of production of ultra-low carbon steel, along with the expansion of smelting time resistance materials and contact between liquid steel has also led to the steel back of carbon, in addition, the ultra low carbon steel because of the quantity more than aluminum, produced a lot of Al2O3 inclusions, so aluminum connecting the sooner, the better for Al2O3 inclusions float process is more advantageous to hou road operation and improve the quality of our products.