摘要
中碳低合金钢在低温下的冲击韧性差,使其应用受到一定的限制。为增强中碳低合金的韧性,通过回火形变工艺构筑超细纤维的仿生组织,实现材料的强韧化。结果表明:经过回火形变后的42CrMo钢组织中包含细长纤维晶粒、<101>//RD的强织构及纳米碳化物,这种“类竹子”的仿生组织可显著提高材料的屈服强度和抗拉强度,抗拉强度达1.4 GPa以上;由于仿生纤维组织裂纹分层与分叉的增韧作用,这种新型材料具有更低的韧脆转变温度,在-80℃条件下的冲击韧性高达107 J,综合力学性能显著高于调质处理的42CrMo钢。该研究对高性能金属材料的设计和制造,具有一定的指导意义。
The application of medium carbon low alloy steel is limited due to its poor impact toughness at low temperatures. In this paper, the microfiber biomimetic tissue is constructed by the tempering deformation process to achieve the toughening of the material. The results show that the microstructure of42CrMo steel after tempering deformation contains slender fiber grains,strong <101>//RD texture,and nano carbides. This "bamboo-like" biomimetic structure significantly improves the yield and tensile strength of the materials,and the tensile strength reaches more than 1. 4 GPa. Due to the toughening effect of the crack delamination and bifurcation of the biomimetic fiber structure,this new material has a lower ductilebrittle transition temperature,the impact toughness is as high as 107 J at-80 ° C,whose mechanical properties are significantly higher than those of the quenched and tempered 42CrMo steel. This work has guiding significance for the design and fabrication of high-performance metal materials.
作者
王军
崔艳雄
刘志学
朱晖朝
殷福星
骆智超
WANG Jun;CUI Yanxiong;LIU Zhixue;ZHU Huichao;YIN Fuxing;LUO Zhichao(Institute of New Materials,Guangdong Academy of Sciences/National Engineering Research Center of Powder Metallurgy of Titanium&Rare Metals/Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application,Guangzhou 510650,China;College of Materials and Chemical Engineering Xi’an Technological University,Xi’an 710021,China;Foshan Taoyuan Institute of Advanced Manufacturing,Foshan 528225,China)
出处
《材料研究与应用》
CAS
2022年第6期976-984,共9页
Materials Research and Application
关键词
中碳低合金钢
回火形变
冲击韧性
分层裂纹
medium carbon low alloy steel
tempering deformation
impact toughness
delamination crack
作者简介
王军(1994-),男,新疆博乐人,硕士研究生,主要从事金属材料强韧性研究的相关工作,E-mail:1501665194@qq.com;通信作者:骆智超(1989-),男,广东河源人,副研究员,主要从事先进钢铁材料研究的相关工作,E-mail:luozhichao@gdinm.com。
