海上完井工具用40CrMnMo钢的高温力学性能  

High-temperature Mechanical Properties of 40CrMnMo Steel for Offshore Completion Tools

作　　者：洪秀玫 王腾飞 程博 HONG Xiumei;WANG Tengfei;CHENG Bo(Engineering Technology Branch,CNOOC Energy Development Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《热处理》2022年第1期58-60,共3页Heat Treatment

摘　　要：40CrMnMo钢是我国热采海上稠油的完井工具用钢。研究了经840℃淬火、550℃回火的40CrMnMo钢在室温和100℃、120℃、150℃、250℃、350℃的应力-应变曲线、力学性能和硬度。结果表明:随着温度的升高,40CrMnMo钢的应力-应变曲线提前弯曲,其屈服强度、抗拉强度和硬度均下降,断面收缩率和断后伸长率则先下降后上升。40CrMnMo is a steel commonly used for completion tools that are used to thermally extract offshore heavy oil in China.The stress-strain curves,mechanical properties and hardness at room-temperature,100℃,120℃,150℃,250℃,and 350℃ of the 40CrMnMo steel quenched from 840℃ and tempered at 550℃ were investigated.The results indicated that as the temperatures increased,the 40CrMnMo steel exhibited the stress-strain curves which bent earlier,and the yield strength,tensile strength and hardness which decreased,and the reduction of area and elongation which decreased at first and then increased.

关 键 词：应力-应变曲线 热强度 热塑性 硬度 

分 类 号：TG113.25[金属学及工艺—物理冶金]