Cr3复合铸钢支承辊差温热处理过程  

Differential heat treatment process of Cr3 compound cast steel backup rollers

作　　者：李莎[1] 吴春京[1] 苏军新 张英杰[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]中钢集团邢台轧辊股份有限公司,邢台054025

出　　处：《北京科技大学学报》2010年第3期331-335,共5页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No.50774009);国家高技术研究发展计划资助项目(No.2009AA03Z532)

摘　　要：以Cr3复合铸钢支承辊为研究对象,采用差温热处理工艺制备满足性能要求的支承辊.研究了支承辊在差温热处理过程中的温度分布情况,分析了轧辊工作层的硬度和组织,运用已开发的淬火温度场模拟系统对支承辊油淬过程温度场进行模拟,并将模拟结果与实测结果进行了比较.结果表明:使用差温热处理工艺可使支承辊的辊芯和辊身在加热完成后得到不同的温度,从而使其在随后的淬火过程中得到不同的组织.支承辊经差温热处理工艺加热后,轧辊工作层内的硬度和组织均满足使用要求.运用已开发的淬火温度场模拟系统对支承辊油淬过程进行模拟,模拟结果与实验结果相吻合,证明该系统具有较高的可靠性,可用于热处理工艺优化,能够为实际生产提供定量的参考依据.The Cr3 compound cast steel backup roller was researched as a subject.A backup roller satisfying the required properties was produced by the differential heat treatment process.The temperature distribution of the backup roller in the differential heat treatment process was studied.The hardness and microstructure of the roller＇s working layer were analyzed.The temperature field of the backup roller in the oil quenching process was simulated by using a developed simulation system of quenching temperature fields.The simulated results were compared with the experimental ones.It is shown that different temperatures in the core and body of the backup roller can be gained by using the differential heat treatment process,and therefore,different microstructures can be obtained in the following oil quenching process.When the backup roller is heated by the differential heat treatment process,the hardness and microstructure of the roller＇s working layer can meet the usage requirements.The oil quenching process of the backup roller was simulated by using the developed simulation system.The simulated and experimental results are basically consistent,indicating that the simulation system has a higher reliability.The simulation system can be used to optimize the heat treatment process and provides a quantificational reference basis for practical production.

关 键 词：铸钢 轧辊 热处理 温度场 数值模拟 

分 类 号：TG156.34[金属学及工艺—热处理]