厚壁離心管坯鑄型涂層厚度的確定及其涂層氣隙綜合傳熱系數(shù)的計算

Determination of Coating Thickness of Centrifugal Casting Mould for Heavy-wall Shell and Calculation of Composite Heat-transfer Coefficient of Coating Air Gap

摘要: 采用實驗與線性插值、模擬相結(jié)合的方法確定了涂層的導熱系數(shù)、涂層氣隙的綜合傳熱系數(shù)。分析了涂層厚度對厚壁管坯橫截面溫度梯度的影響,并結(jié)合實際對不同工藝參數(shù)下管坯橫截面的溫度梯度進行了分析,確定了不同壁厚管坯的涂層厚度范圍。

Abstract: The heat conductivity factor of the coating and the composite heat-transfer coefficient of the coating air gap are determined by means of relevant practice and linear interpolation together with simulation.Influence by the coating thickness on the cross section temperature gradient of the heavy-wall shell is analyzed.Also analyzed are the cross section temperature gradients of the shell with different technological parameters on the basis of actual operation status,resulting in determination of the coating thickness ranges for shells with different wall thicknesses.