摘要
为降低热应力造成多层结构浸入式水口开裂的可能性，采用有限单元法研究了内面层厚度和材料物理性能参数对其热应力的影响，以及内面层厚度和导热系数对其内壁温度的影响。结果表明，当内面层厚度由0mm增至10mm时，浸入式水口所受最大拉应力先升后降；当其厚度在2-4mm之间时，托应力较小。随着内面层弹性模量、热膨胀系数和导热系数的降低，最大拉应力减小。增加外面层厚度，减小其导热系数，预热后浸入式水口内壁温度的降低幅度减小。
To reduce the cracking probability of a submerged entry nozzle （SEN） with multi-layer structure caused by thermal stress, the influences of the thickness and the parameters of physical properties of the inner layer on its thermal stress were studied by finite element method, so did the thickness and the coefficient of heat conductivity of the outer layer on the temperature of its inner wall. The results show that the maximum tension stress decreases first and then increases when the thickness of the inner layer of SEN increases from 0 mm to 10 mm, and the tension stress is lower when its thickness is between 2 to 4 mm. The maximum tension stress reduces when the modulus of elasticity, thermal expansivity and coefficient of heat conductivity of the inner layer decreases. With the increase of the thickness and the decrease of the heat conductivity coefficient of outer layer, the decreased degree of the inner wall temperature of preheated SEN is less.
出处
《铸造技术》
CAS
北大核心
2012年第3期339-341,共3页
Foundry Technology
关键词
浸入式水口
内面层
外面层
物理性能参数
submerged entry nozzle
inner layer
outer layer
parameter of physical property
