35MnSiB弹簧钢脆性的研究  

STUDY ON BRITTLENESS OF SPRING STEEL 35MnSiB

作　　者：王福明[1] 吴承建[1] 孙静远 徐荣军[1] 姚忠卯 欧昌俗 马智明[1] 

机构地区：[1]北京科技大学,安阳钢铁(集团)公司

出　　处：《钢铁》1997年第3期44-48,共5页Iron and Steel

摘　　要：研究了３５ＭｎＳｉＢ钢冲击和拉伸性能以及回火温度对其性能的影响；借助于扫描电镜及俄歇谱仪，对断口形貌和晶界成分进行了分析。试验结果表明：试样的脆性断口基本上是沿晶断口，在晶界上有磷、硅的偏聚，有碳化物和氮化物存在；试样的尺寸和表面状态对塑性有较大的影响，４００Ｃ回火可显著改善试样的塑性和韧性。In this paper the impact and tensile properties of 35MnSiB and the effect of tempering temperature on them are studied. The fractrue morphology and composition at boundary have been analyzed by use of scanning electron microscope and Auger spectrometer. The results show that the brittle fracture is bascically intergranular character, there exists segragation of P, Si, carbide and nitride on grain boundaries, the size and surface state of specimens have realtive large effect on ductility, the tempering at 400℃ can greatly improve the ductility of the steel.

关 键 词：弹簧钢 沿晶断口 脆性 

分 类 号：TG142.41[一般工业技术—材料科学与工程]