摘要
介绍了钢坯高温防氧化涂层国内外研究现状及发展趋势。通过Thermo-Calc热力学软件对表面喷涂高温防氧化涂料的钢坯加热过程进行模拟,对体系的初始条件进行设定,确定加热温度范围为25~1 500℃,计算得到体系的摩尔体积、密度以及比热容,通过绘图软件绘制图像并进行数据拟合分析,得到涂层的热力学性质随温度的变化规律。结果表明,涂层体系的摩尔体积大致随着温度的升高而增大,也就是发生体积的膨胀,但升高到一定温度后可能会发生收缩,继续升温,体积接着膨胀;体系的密度大致随着温度的升高而减小,但升高到一定温度后可能会发生回升,继续升温,体系的密度又继续减小;体系的比热容随着温度的升高而增大,但存在转变区间,其中出现的折点、拐点、转变区间等代表着涂层质量及热力学性质的变化,对涂层材料的研发设计具有指导作用。
The development status and development trend of billet high-temperature anti-oxidation coating at home and abroad are introduced.Through Thermo-Calc thermodynamic software,the heating process of the billet sprayed with high-temperature anti-oxidation coating on the surface is simulated,the initial conditions of the system are set,the heating temperature range is determined to be 25~1500℃,the molar volume,density and specific heat capacity of the system are calculated,and the image is drawn by the drawing software and the data fitting analysis is carried out,and the change law of the thermodynamic properties of the coating with temperature is obtained.The results show that the molar volume of the coating system roughly increases with the increase of temperature,that is,the expansion of the volume occurs,but after increasing to a certain temperature,it may shrink,and the volume will continue to heat up and then expand.The density of the system roughly decreases with the increase of temperature,but it may rise after increasing to a certain temperature,and the density of the system continues to decrease after increasing temperature.The specific heat capacity of the system increases with the increase of temperature,but there are transition intervals,among which the vertex point,inflection point and transition interval represent the change of coating quality and thermodynamic properties,which has a guiding role in the development and design of coating materials.
作者
段东江
张贵杰
李海英
Duan Dongjiang;Zhang Guijie;Li Haiying(HBIS Group Tangsteel Company,Tangshan 063016,Hebei;School of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei)
出处
《河北冶金》
2023年第9期36-41,共6页
Hebei Metallurgy
