利用热分析仪控制铁液共晶度

Using Thermal Analyser to Control Eutectic Degree of Iron Melt

介绍了Si对共晶度和共晶点的影响,指出了孕育衰退和铁液温度是影响铁液共晶度的主要因素,通过生产实例,叙述了利用热分析仪控制铁液共晶度的方法:从测量跟踪的铸件中选出材料性能和加工性能相对满意的铸件,根据孕育、扒渣后热分析仪的测量记录,反查出该炉原铁液的热分析测量记录,再根据原铁液热分析结果和孕育后铁液热分析结果计算出提高共晶度的幅值,根据该铁液的热分析测量记录中的初晶温度,核定出终浇温度、始浇温度以及出铁温度,从而得到性能良好且稳定的优质铸件。

The influence of Si on eutectic degree and eutectic point was introduced. It was pointed out that the inoculation degeneration and temperature of iron melt were the main factors influencing eutectic degree of the iron melt. By showing productive example,the method to control eutectic degree with thermal analyzer was described ：picking out the castings having relatively satisfactory properties and machinability of the material from the castings which were traced and tested,re-lookup the thermal analyzing test record of the base iron used for concerned melting according to the test record of thermal analyzer after inoculation and slag skimming,calculating the amplitude value of the eutectic degree to be elevated,checking and ratifying the last pouring temperature,beginning pouring temperature and tapping temperature according to the primary crystal temperature of thermal analyzing record of concerned iron melt and thereby to obtain the high quality castings having excellent and stable properties.