退火工艺对低合金高强钢组织和性能的影响  

Effects of Annealing Process on Structure and Mechanical Properties of HSLA Steel

作　　者：刘李斌[1,2] 谢春乾 邝霜[2] 韩赟[2] 刘华赛[2] 姜英花[2] 滕华湘[2] LIU Libin;XIE Chunqian;KUANG Shuang;HAN Yun;LIU Huasai;JIANG Yinghua;TENG Huaxiang(State Key Laboratory for Advanced Metal and Materials,University of Science and Technology Beijing,Beijing 100083,China;Shougang Research Institute of Technology,Beijing 100043,China)

机构地区：[1]北京科技大学新金属材料国家重点实验室,北京100083 [2]首钢技术研究院,北京100043

出　　处：《热加工工艺》2018年第24期223-225,共3页Hot Working Technology

摘　　要：通过对不同退火工艺下低合金高强钢力学性能和组织状态,以及退火过程中析出相的状态分析,研究了退火工艺对低合金高强钢组织和性能的影响。结果表明:材料组织为铁素体基体加少量渗碳体,同时在基体中有200 nm和10 nm左右两种不同尺寸的Ti Nb(C,N)析出相生成。随着退火温度的增加,析出相尺寸增加而数量降低;同时,材料的屈服强度和抗拉强度逐渐降低,伸长率逐渐升高。The effects of annealing process on the microstructure and mechanical performance of low-alloyed high strength steel was studied by researching the mechanical properties and microstructure, and the precipitates during different annealing process. The results show that the microstructure of the steel is ferrite and a few Fe3 C at grain boundaries, and a lot of 10 nm or 200 nm grade Ti Nb(C, N) precipitates appear in the ferrite matrix. And the size of precipitates increases while the number gradually decreases with the annealing temperature increasing, and at the same time the yield strength and tensile strength decrease and the elongation increases.

关 键 词：低合金高强钢 连续退火 析出相 性能 

分 类 号：TG156.2[金属学及工艺—热处理]