复杂多元Cu-Fe-P-Zn-Sn-Mg合金的冷加工硬化及再结晶温度研究
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摘要
对复杂多元Cu-Fe-P-Zn-Sn-Mg合金的冷加工特性进行研究,绘制其加工硬化曲线。通过测试不同退火态复杂多元铜合金的抗拉强度、伸长率及硬度,并进行显微组织观察,拟合出抗拉强度与退火温度、加工率之间的曲线,确定出合金的再结晶温度。结果表明,Cu-Fe-P-Zn-Sn-Mg合金具有明显的加工硬化特性,随着加工率的增加,该合金的抗拉强度和硬度增加,而伸长率则呈相反的变化规律。当加工率达到80%时,合金抗拉强度可达560 MPa,硬度可达160 HV。在相同的退火时间下,随着退火温度的增加,该合金的抗拉强度呈先缓慢减小,再剧减,最后趋于稳定的变化规律。合金在不同退火温度及加工率条件下,其抗拉强度与退火温度和加工率之间的关系符合y=(2.65ε+28.05)/[1+e^(x+1.62ε-503.04)/(0.006ε+19.06)]+0.22ε+307.68。为有效减少能耗和缩短生产周期,确定Cu-Fe-P-Zn-Sn-Mg合金经80%变形后的合理再结晶退火制度为450℃×1 h。
The cold deformat ion characteristic of complex Cu-Fe-P-Zn-Sn-Mg alloy was researched and then the work hardening curve was drawn. By testing the tensile strength, hardness and elongation of the alloy under different annealing temperature and observing the microstructure, the curves of tensile strength, annealing temperature and working rate were fitted, and then the recrystallization temperature of the alloy was ensured. The results show that Cu-Fe-P-Zn-Sn-Mg alloy has obvious work hardening effect after cold deformation. The tensile strength and hardness of the alloy increase with the increase of working rate, while the elongation exhibites opposite change. When working rate reaches 80%, the tensile strength and hardness of the alloy can be up to 560 MPa and 160 HV, respectively. With the same annealing time, the tensile strength of the alloy decreases slowly firstly and decreases largely, and then keeps constant with the increase of annealing temperature.Under different annealing temperatures and working rates, the relation between annealing temperature, tensile, strength and working rate of the alloy accords with the formula y=(2.65ε+28.05)/[1+ e^(x+1.62ε-503.04)/(0.006ε+19.06)]+0.22ε+307.68.In order to reduce the energy consumption and shorten the production period, the recrystallization annealing process of Cu-Fe-P-Zn-Sn-Mg alloy after 80% deformation is determined as 450 ℃×1 h.
The cold deformat ion characteristic of complex Cu-Fe-P-Zn-Sn-Mg alloy was researched and then the work hardening curve was drawn. By testing the tensile strength, hardness and elongation of the alloy under different annealing temperature and observing the microstructure, the curves of tensile strength, annealing temperature and working rate were fitted, and then the recrystallization temperature of the alloy was ensured. The results show that Cu-Fe-P-Zn-Sn-Mg alloy has obvious work hardening effect after cold deformation. The tensile strength and hardness of the alloy increase with the increase of working rate, while the elongation exhibites opposite change. When working rate reaches 80%, the tensile strength and hardness of the alloy can be up to 560 MPa and 160 HV, respectively. With the same annealing time, the tensile strength of the alloy decreases slowly firstly and decreases largely, and then keeps constant with the increase of annealing temperature.Under different annealing temperatures and working rates, the relation between annealing temperature, tensile, strength and working rate of the alloy accords with the formula y=(2.65ε+28.05)/[1+ e^(x+1.62ε-503.04)/(0.006ε+19.06)]+0.22ε+307.68.In order to reduce the energy consumption and shorten the production period, the recrystallization annealing process of Cu-Fe-P-Zn-Sn-Mg alloy after 80% deformation is determined as 450 ℃×1 h.
引文
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[6]董超群,易均平.铍铜合金市场与应用前景展望[J].稀有金属,2005,29(3):350-356.
[7]陈乐平,周全.铍铜合金的研究进展及应用[J].热加工工艺,2009,38(22):14-18.
[8]Liang Q I,Liu R Q,Cai W.A study of the tensile properties and conductivity of C70250 copper alloy[J].Southern Metals,2006,(2):25-27.
[9]Tu S,Yan X,Xie S.Structure and Performance of C194 Copper Alloy Used for Lead Frame[J].Chinese Journal of Rare Metals,2004,28(1):199-201.
[10]Monzen R,Watanabe C.Microstructure and mechanical properties of Cu-Ni-Si alloys[J].Materials Science and Engineering A,2008,483:117-119.
[11]马吉苗,汪东亚,郑芸,等.电机整流子用Cu-Ag合金的冷加工硬化及再结晶温度的研究[J].特种铸造及有色合金,2015,35(9):1006-1008.
[12]胡庚祥,蔡珣,戎咏华.材料科学基础[M].上海:上海交通大学出版社,2000.
[13]王智祥,王建,刘峰,等.镍铝黄铜再结晶试验研究[J].热加工工艺,2011,40(18):174-176.
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