摘要
采用冷却板技术，应用半固态处理工艺生产高质量超高含碳铸钢（ultrahigh-carbon steel-UHCS）零件。当有部分固体存在时，对它的微观组织和机械性能进行了研究。应用半固态处理工艺，改善了UHCS的微观组织，得到由细小晶粒尺寸（200-100μm）构成的独特、均匀微观组织，且完全不同于用传统的方法得到的UHCS铸件（其晶粒尺寸为520μm）。采用半固态处理工艺生产的UHCS铸件，其铸态和热处理状态的抗拉强度相对于传统工艺生产的铸件要高。抗拉强度、伸长率、微粒晶粒尺寸和网状渗碳体与液体中固体部分多少的变化紧密相关，并且随着液体中固体部分量的增加，硬度值也增加。这被认为是经过半固态处理工艺处理使金属组织细化和均匀的结果。
Using cooling plate technique, semi - solid processing was developed to produce a high quality ultrahigh - carbon steel （UHCS） components. Microstructure and mechanical properties were investigated as a function of fraction of solid. The microstructure of UHCS was improved using semi - solid processing. A unique homogenized microstructure comprised of fine particles grain size （200 - 100μm） was obtained which totally differs from that obtained by ordinary UHCS casting （520 tan particle grain size）. Tensile strength of casted and heat treated semi - solid processed UHCS is relatively high compared with ordinary one. The tensile strength, elongation, particle grain size closely connect with the cementite network changed with fraction of solid. When the fraction of solid increasing, its hardness values increase, which is attributed to the fine and homogenous structure by semi-solid processing.
出处
《陕西工业职业技术学院学报》
2007年第1期24-28,共5页
Journal of Shaanxi Polytechnic Institute
关键词
半固态处理工艺
冷却板
超高含碳铸钢
微观组织
石墨化
semi-solid processing
cooling plate
ultrahigh-carbon steel
microstructure
graphitization
