电缆用冷轧纳米Cu-20%Zn的应变硬化及退火组织分析  

Analysis on Strain Hardening and Annealing Microstructure of Cold-rolling Nano Cu-20% Zn for Cable

作　　者：李瑾[1] 杨昌永 LI Jin1, YANG Changyong2(1. Jinzhong Vocational and Technical College, Department of Mechanical and Electrical Engineering, Jinzhong 030600, China; 2. Coal and Coal-bed Methane Mining State Key Laboratory, Jinzhong 030600, Chin)

机构地区：[1]晋中职业技术学院机电工程系,山西晋中030600 [2]煤与煤层气共采国家重点实验室,山西晋中030600

出　　处：《热加工工艺》2018年第14期72-74,共3页Hot Working Technology

摘　　要：对电缆材料用纳米金属Cu-20%Zn合金的应变硬化、不同退火温度下的组织以及准静态拉伸性能进行研究。结果表明：Cu-20%Zn合金比单纯Cu具有更高的屈服强度,从55 MPa增大至115 MPa。该合金在退火温度350℃下加工硬化曲线变化率变陡。随着变形的进行,伸长率增大至36%时发生失稳,表现出优异的强塑匹配性能并产生瞬态硬化行为。对冷轧态合金组织进行退火处理之后其基体内部出现了再结晶现象。拉伸变形处理后,合金组织内的晶粒尺寸与取向变化明显。断口组织中存在众多韧窝结构,其断裂机制属于韧性断裂。The strain hardening, the microstructure at different annealing temperatures and quasi static tensile properties of cable material with nanometer metal Cu-20%Zn alloy were studied. The results show that the yield strength of Cu-20%Zn alloy is higher than that of Cu, increasing from 55 MPa to 115 MPa. The change rate of work hardening curve of the alloy at annealing temperature 350 ℃ becomes steep. With the deformation running, the elongation increases to 36% and then generating unstable, which shows excellent strength and plastic matching, and then the transient hardening behavior appears.After annealing treatment for the microstructure of cold rolled state alloying, the recrystallization phenomenon appears in its matrix.After tensile deformation treatment, the grain size and orientation change in the microstructure of the alloy is obvious.Many toughening nest structures exist in the fracture microstructure, and its fracture mechanism belongs to ductile fracture.

关 键 词：纳米Cu-20%Zn 应变硬化 组织 晶粒 

分 类 号：TG113[金属学及工艺—物理冶金]