【作者】 龙绍檑； 梁益龙； 易艳良； 徐军； 严振；

【Author】 LONG Shao-lei;LIANG Yi-long;YI Yan-liang;XU Jun;YAN Zhen;School of Materials Science and Metallurgical Engineering,Guizhou University;Guizhou Key Laboratory of materials strength and structure;

【机构】 贵州大学材料与冶金学院； 贵州省材料结构与强度重点实验室；

【摘要】 利用ANSYS软件建立"变温层"模型,分析淬火剂的冷却能力,进而改善和开发淬火介质。结果表明:变温层对马氏体相变点以下的温度区域影响较大。随变温层厚度增加,相变时间延长,试样表层和心部的温差变得均匀,有利于减小残余应力。此外,变温层的存在是必然的,试样淬火的搅拌速度或介质的流速存在一个极大值u_max,对应的变温层厚度存在一个极小值x_max,u_max与x_max存在对应关系。更多还原

【Abstract】 Using ANSYS established the "Thermocline" model to analyze the cooling capacity of quenching medium,and thereby improving and developing the quenching agent.The results showed that thermocline impact greater below the Martensitic phase transformation.As the thickness of thermocline increasing,the time of phase transformation was extended,and the temperature difference between the surface layer and the centre of the sample became uniform,which was good for reducing the residual stress.In addition,the presence of thermocline was inevitable,flow rate of the sample or medium agitation speed existed a maximum value u_max and the thickness of thermocline existed a minimum value x_max,and there is a certain,correspondence between u_max and x_max.更多还原