对筒节在热处理过程中尺寸及组织变化的预测  

Prediction of Dimension and Structure Change of Shell during Heat Treatment

作　　者：武川[1] 何毅[1] 胡海朝[1] 

机构地区：[1]中国一重天津重型装备工程研究有限公司,助理工程师天津440027

出　　处：《一重技术》2016年第2期38-42,共5页CFHI Technology

摘　　要：加氢筒节是石油化工领域核心装备的关键构件,对力学性能的要求极高。为了满足性能要求,通常采用正火和调质热处理。然而,在热处理过程中筒节的尺寸和微观组织会发生复杂变化。而基于数值模拟方法,建立起的筒节热处理过程的有限元模型,可用来预测筒节热处理过程中筒节尺寸和微观组织的演化规律,是一种高效快捷的分析工具。为此,首先测试出2.25Cr-1Mo-0.25V材料的物性参数和奥氏体、贝氏体、马氏体及相应回火组织的应力-应变曲线,然后基于所测物性参数建立起筒节正火和调质过程的DEFORM-3D有限元模型。在此基础上预测筒节的内、外径和高度的变化,以及微观组织的演化,并将预测筒节尺寸变化值与现场实测值进行对比,结果二者吻合良好,证明该模型的可靠性,可以为后续筒节控轧控冷工艺的研究工作提供指导。Hydrogenation shell is a key component of core equipment in petrochemical industry, it is highly demanded for mechanical properties. In order to satisfy the performance requirement, usually normalization and quenching-tempering heat treatment are applied. The dimension and microstructure of shell will be changed during heat treatment. Based on numerical simulation method, establishes finite element model for shell heat treatment procedure, which can predict the evolution rule of change for the dimension and microstructure of shell during heat treatment, it is a kind of analysis tool with high efficiency. Hence, firstly the stress-strain curve of physical property of 2.25 Cr-1Mo-0.25 V material and austenite, bainite, martensite as well as corresponding tempered structure is tested, secondly DEFORM-3D finite element model for shell normalization and quenching-tempering procedure is established based on tested physical property data. Predict the inner, outer and height change of shell, and evolution of microstructure, the comparison between predicted shell dimension change value and actual measured value on site shows they are consistent well, prove the reliablility of this model, this provides guidance for future shell control rolling and cooling process.

关 键 词：加氢筒节 微观组织演化 数值模拟方法 奥氏体 贝氏体 

分 类 号：TG15[金属学及工艺—热处理] TP391.9[金属学及工艺—金属学]