新型贝氏体板簧钢的组织及性能  

Microstructure and properties of new type bainitic leaf spring steel

作　　者：蒋文淼 胡志华[1] 栾道成[1] 张旭 凌俊华 阴志铭 李缘 周新宇 王正云[1] Jang Wenmiao;Hu Zhihua;Luan Daocheng;Zhang Xu;Ling Junhua;Yin Zhiming;Li Yuan;Zhou Xinyu;Wang Zhengyun(School of Materials Science and Engineering,Xihua University,Chengdu Sichuan 610039,China)

机构地区：[1]西华大学材料科学与工程学院,四川成都610039

出　　处：《金属热处理》2022年第7期151-155,共5页Heat Treatment of Metals

基　　金：四川省科技支撑项目(20ZDYF2461,20ZDZX0042);西华大学重点科研基金(Z203121);西华大学创新基金(YCJJ2021033)。

摘　　要：针对汽车减重和环保问题,自行设计研制了车用新型贝氏体板簧钢,并对其组织和力学性能进行研究。结果表明,该钢经正火热处理即可得到无碳贝氏体组织;XRD检测表明,其物相组成以α相为主;该钢具有优良的综合力学性能和耐腐蚀性能,屈服强度近1200 MPa,抗拉强度达1400 MPa,常温下,冲击吸收能量达到73.2 J以上,强韧性配比优异。Aiming at the problems of automobile weight reduction and environmental protection,a new type of bainitic leaf spring steel for automobiles was designed and developed,and the microstructure and mechanical properties were studied.The results show that the carbide-free bainitic microstructure of the steel can be obtained by normalizing.XRD test results show that its phase composition is dominated byαphase;The steel has excellent comprehensive mechanical properties and corrosion resistance,with yield strength of nearly 1200 MPa,tensile strength of 1400 MPa,impact absorbed energy of 73.2 J or more at room temperature,and excellent match of strength and toughness.

关 键 词：贝氏体钢 汽车板簧 显微组织 韧性 硬度 

分 类 号：TG142.1[一般工业技术—材料科学与工程]