摘要
通过对含氮028合金进行不同变形量的冷轧,采用光学显微镜(OM)、透射电镜(TEM)和拉伸试验研究了冷变形量对其组织和力学性能的影响。结果表明,当冷变形量相同时,随着氮含量的增加,屈服强度增加明显。当冷变形量从0%增加到70%时,0.25%N试验合金的抗拉强度从764 MPa提高到1405 MPa,屈服强度从390 MP提高到1249 MPa。在低变形量时,试验合金中存在大量位错和平面滑移结构。随着冷变形量的增加,试验合金中形变孪晶的数量逐渐增加,位错不断增殖。当冷变形量继续增加时,形变孪晶被割裂破碎。
Effect of cold rolling deformation on microstructure and mechanical properties of 028 alloy containing nitrogen was studied by means of optical microscope(OM), transmission electron microscope(TEM) and tensile test. The results show that when the amount of cold deformation is the same, the yield strength increases obviously with the increase of nitrogen content. When the cold deformation is increased from 0% to 70%, the tensile strength of the 0.25%N tested alloy is increased from 764 MPa to 1405 MPa, and the yield strength is increased from 390 MP to 1249 MPa. At low deformation, there are a large number of dislocations and plane slip structures in the alloy. With the increase of cold deformation, the number of deformation twins in the alloy increases gradually, and the dislocations multiply continuously. When the cold deformation continues to increase, the deformation twins are split and broken.
作者
巩芳源
冯翰秋
郎宇平
陈海涛
王宝顺
钟强
冷崇燕
Gong Fangyuan;Feng Hanqiu;Lang Yuping;Chen Haitao;Wang Baoshun;Zhong Qiang;Leng Chongyan(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China;Resenrch Institute of Special Steels,Central Iron and Steel Research Institute,Beijing 100081,China;Zhejiang Jiuli Special Material Technology Co.,Ltd.,Huzhou Zhejiang 313028,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2021年第12期19-23,共5页
Heat Treatment of Metals
基金
国家重点研发计划(2016YFB0300202)。
关键词
含氮028合金
冷变形
微观组织
力学性能
nitrogen containing 028 alloy
cold deformation
microstructure
mechanical properties
