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中文摘要：
本文通过坩埚电阻炉熔化ZL101合金,采用楔形及圆台模具进行重力浇铸,并利用自制的凝固冷却曲线实时监测装置采集其凝固过程中的温度信号和冷却速率变化,之后通过光学显微镜（OM）观察不同类型模具在采温点处合金组织的微观形貌。结果表明,该实时监测系统可同时读取在多个采温点处的合金凝固过程的温度改变情况,信号采集精度高,冷却速率值便于直接获取,为可视化铸造奠定基础。经300℃预热保温的模具可有效降低合金铸造缺陷,晶粒组织均匀细小,而未经预热模具的合金冷速较大、形核率高,且在大过冷条件下易于形成针状初生α-Al相。
英文摘要：
This paper aims to investigate the ZL101 alloy melted by crucible resistance furnace,and then cast into wedge-shaped and circular table dies by gravity casting method.The changes of temperature signal and cooling rate during solidification process were collected by self-designed realtime monitoring device for solidification cooling curves.And then the microstructural morphology of selected alloys near the temperature collecting points obtained by different dies was observed by using optical microscope（OM）.Experimental results indicate that this type real-time monitoring system could record multi-unit temperature changes during solidification process,it also shows the signal collecting with high precision,and cooling rate directively obtaining,further to provide the reference and foundation for view-cast technique.The pre-heating die（holding at 300℃）could effectively reduce the casting defects（i.e.shrinkage cavity and porosity）,and enhance the grains homogeneity,while the alloy obtained by non-preheating die possesses the larger cooling rates,the higher nucleation rate,which is apt to form the primaryα-Al phase under the large undercooling conditions.
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