特厚钢板射流冲击淬火过程厚向冷速试验研究  

Experimental studies on thickness direction cooling rate of water jet impingement quenching for ultra heavy plate

作　　者：付天亮[1] 王昭东[1] 韩钧[1] 邓想涛[1] 王国栋[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《材料热处理学报》2016年第12期180-188,共9页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51104045)

摘　　要：利用开发的特厚钢板射流淬火试验装置及多通道温度记录仪,测试了射流速度14.0~23.5 m/s、射流压力0.4~1.0 MPa条件下,84 mm、170 mm厚大断面钢板淬火温降曲线,采用有限元方法建立了三维反传热导热模型和表面换热系数模型,对比分析了射流参数和换热区分布对钢板厚向温降、温度梯度和冷速的影响。结果表明：84 mm厚钢板断面冷速与表面换热系数近似正比关系,射流速度为23.5 m/s时钢板心部冷速达3.7℃/s;170 mm厚钢板表面换热对厚向冷速影响减弱,相应的温度遗传效应和断面厚向温度梯度的影响增强。Based on the ultra heavy plate jet impingement quenching test device and a multi-channel temperature recorder,the quenching temperature drop curves of large section plates with thickness of 84 mm and 170 mm were investigated under the condition of jet velocity of14. 0-23. 5 m/s and jet pressure of 0. 4-1. 0 MPa. A three dimensional inverse heat conduction model and a surface heat transfer coefficient model were established with finite element method. Influence of jet parameters and heat transfer distribution on the temperature drop in thickness direction,temperature gradient and cooling rate of the steel plate was comparative analyzed. The results indicate that section cooling rate is nearly proportion to surface heat transfer coefficient for 84 mm thick plates,and core cooling rate is equal to 3. 7 ℃/s when jet velocity is 23. 5 m/s. The effect of surface heat transfer on section cooling rate is smaller for 170 mm thick plate,and the influence of temperature genetic effect and section temperature gradient to section cooling rate is greater.

关 键 词：特厚钢板 射流淬火 换热数学模型 冷速 温度梯度 

分 类 号：TG156.34[金属学及工艺—热处理]