35CrMo钢在构筑成形时连接界面氧化物演变的热力学预测  

Thermodynamic prediction of oxide evolution at joint interface of 35CrMo steel during hot-compression bonding

作　　者：仝珏川 陈一安 郭正洪[1] 顾剑锋[1] 卢伟炜 TONG Jue-chuan;CHEN Yi-an;GUO Zheng-hong;GU Jian-feng;LU Wei-wei(Shanghai Key Laboratory of Materials laser Processing and Modification,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;CITIC Pacific Special Steel TAILAI mould Technology Co Ltd,Ningbo 315000,China)

机构地区：[1]上海市激光制造与材料改性重点实验室,上海交通大学材料科学与工程学院,上海200240 [2]中特泰来模具技术有限公司,浙江宁波315000

出　　处：《材料热处理学报》2024年第11期207-215,共9页Transactions of Materials and Heat Treatment

基　　金：国家重点研发计划项目(2018YFA0702900)。

摘　　要：通过热力学原理预测了35CrMo钢在构筑成形过程中,连接界面上氧化物的形成及演化趋势。结果表明:室温常压下材料表面形成的氧化物种类主要是Fe_(3)O_(4),而在1000℃以上的高温及0.1 Torr的真空环境下,则主要形成Mn_(3)O_(4)。当热压变形使接触表面闭合并转化为连接界面后,先前形成的所有种类氧化物在保温阶段均会逐渐分解。在预测的基础上,采用对应的模拟实验进行验证,扫描电镜(SEM)观察和能谱仪(EDS)检测结果与热力学预测结果大致相符。同时发现,热压后的保温阶段会使氧化物分解,可有效提高连接试样的力学性能。The formation and evolution trend of oxides at the joint interface of 35CrMo steel during hot-compression bonding(HCB)process were predicted through thermodynamic principles.The results show that the main type of oxide formed on the surface of the material at room temperature and atmospheric pressure is Fe_(3)O_(4),while in high temperatures above 1000℃and vacuum environments with pressure of 0.1 Torr,Mn_(3)O_(4)is mainly formed.When hot-compression deformation causes the contact surface to close and transform into a connecting interface,all types of oxides previously formed will gradually decompose during the holding at hot-compression temperature.On the basis of prediction,corresponding simulation experiments are used for verification,and the results of scanning electron microscopy(SEM)observation and energy dispersive spectroscopy(EDS)detection are basically consistent with the thermodynamic prediction results.At the same time,it is found that the holding stage after hot-compression causes the decomposition of oxides,which can effectively improve the mechanical properties of the bonding joint samples.

关 键 词：35CRMO钢 构筑成形 氧化与分解 热力学预测 

分 类 号：TG142.3[一般工业技术—材料科学与工程]