论文部分内容阅读
介绍了钢淬火介质润湿的动力学和运动学。介质润湿的动力学以液相在固相表面的接触角θ来表征,θ=arccos[(γSV-γSL)/γLV],它与三相之间的表面能与表面张力有关。介质润湿的运动学涉及蒸汽膜的破裂和润湿的速度或润湿的间隔时间。影响介质润湿的运动学的主要因素有液相介质的温度、添加物、搅拌和速度、实际工件的成分和传热性质、工件的几何形状和尺寸、表面性质、液相介质的特性等。对上述问题的认识和改进,可以改善钢件和金属在液相介质中淬火后获得的组织和性能。
The kinetics and kinetics of steel quenching medium wetting are introduced. The kinetics of the wetting of the medium is characterized by the contact angle θ of the liquid phase on the solid surface, θ = arccos [(γSV-γSL) / γLV], and the surface energy between it and the three phases depends on the surface tension. The kinematics of media wetting involve the rate of rupture and wetting of the vapor film or the wetting interval. The main factors that influence the kinematics of the medium wetting are the temperature, additives, stirring and speed of the liquid medium, the composition and heat transfer properties of the actual workpiece, the geometry and size of the workpiece, the surface properties and the characteristics of the liquid medium. Recognition and improvement of the above problems can improve the microstructure and properties of steel and metal obtained after quenching in liquid medium.