摘要
采用OPM、SEM及EDS等检测手段研究C89320无铅铋青铜宏观、微观组织特征及力学性能。结果表明:该合金以连铸方式生产,显微组织由α相、富磷α相、粒状金属铋和Cu3P组成。粒状金属铋和Cu3P只在富磷α相内生成,其分布、形态、数量和大小与富磷α相成分有关。铸态下,该合金的屈服强度为148 MPa、抗拉强度为300 MPa、断后伸长率为36.5%、硬度为70.5 HBW、抗压强度为146 MPa、夏比冲击吸收能量为28 J。常温冲击断口呈韧窝状,具有良好的切削加工性能。
The macrostructure, microstructure and mechanical properties of C89320 lead-free bismuth tin bronze were investigated by OPM, SEM and EDS techniques. The results show that when the C89320 is fabricated by continuous casting process, the microstructure mainly contains a phase, phosphorus-rich a phase, particle-like Bi and Cu3P phases. Bi and Cu3P phases are associated with the phosphorus-rich a phase, whose morphology, size and number are related to the composition of the phosphorus-rich a phase. The yield strength, tensile strength, elongation, hardness, compressive strength and impact energy of the as-cast alloy are 148 MPa, 300 MPa, 36.5%, 70.5 HBW, 146 MPa, and 28 J, respectively. The impact fracture at the room temperature is typical dimple fracture pattern and the alloy has excellent cutting machinability.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2012年第9期2546-2552,共7页
The Chinese Journal of Nonferrous Metals
基金
辽宁出入境检验检疫局基金资助项目(LK34-2010)
