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研究了用于抽芯铆钉钉体的材料CP-Ti的再结晶温度以及基于该材料的抽芯铆钉钉体的镦锻工艺。结果表明:当加热温度在550~800℃时,随着加热温度的升高,CP-Ti显微组织发生回复、再结晶、晶粒长大,结合不同温度下的材料组织变化,通过金相法和显微硬度法确定CP-Ti的再结晶温度为650℃;根据材料特点以及钉体强度要求,采用温镦工艺成形钉体,当加热温度为400℃时,镦锻出的钉体头部成形良好,杆部强度达到设计要求。
The recrystallization temperature of CP-Ti, a material used for core-pulling rivet, and the upsetting process of blind rivet nail body based on this material were studied. The results show that the microstructure of CP-Ti reverts, recrystallizes and grain grows with the increase of heating temperature when the heating temperature is 550-800 ℃. The microstructure of CP-Ti alloy is characterized by metallographic method and The recrystallization temperature of CP-Ti was determined to be 650 ℃ by microhardness test. According to the characteristics of the material and the strength requirements of the nail body, the nail body was formed by the warm upsetting process. When the heating temperature was 400 ℃, Good, rod strength to meet the design requirements.