热型连铸法制备CuAlBe形状记忆合金管接头
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摘要
研究了用热型连铸法制备Be含量为0.4%的柱状晶组织CuAlBe形状记忆合金管及其晶状组织,将合金管切割成段,经固溶处理后扩径即成管接头。当连铸速度为80mm/min、冷却距离为10mm、压头为20mm、铸型温度为1 030℃时,记忆合金管连铸过程最平稳,管的表面质量及尺寸控制最好。管接头的最大扩径率可达10.20%,此时管接头的形状回复率仍可达到92.86%。名义扩径率为7.55%时,扩径后As、Af温度升高,Ms、Mf温度降低,合金的相变温度滞后范围从扩径前的40℃增加到了70℃。
Columnar crystal CuAlBe shape memory alloy tube by 0.4%Be was produced by heated mold continuous casting process,then the tube was cut into segments,after solution treatment and diameter expansion,the pipe joint was completed.With continuous casting speed at 80mm/min,cooling distance at 10 mm,pressure head at 20 mm and the mould temperature at 1 050℃,the continuous casting memory alloy tube exhibits very stable with desirable surface quality and size precision.The maximal expanding ratio of the coupler can reach 10.20%,and the shape recovery rate can reach 92.86%.When nominal expanding ratio is 7.55%,the Asand Aftemperature are increased,and Msand Mftemperature are decreased after diameter expansion.In addition,transformation hysteresis temperature range of the alloy is increased from 40℃before diameter expansion to 70℃.
Columnar crystal CuAlBe shape memory alloy tube by 0.4%Be was produced by heated mold continuous casting process,then the tube was cut into segments,after solution treatment and diameter expansion,the pipe joint was completed.With continuous casting speed at 80mm/min,cooling distance at 10 mm,pressure head at 20 mm and the mould temperature at 1 050℃,the continuous casting memory alloy tube exhibits very stable with desirable surface quality and size precision.The maximal expanding ratio of the coupler can reach 10.20%,and the shape recovery rate can reach 92.86%.When nominal expanding ratio is 7.55%,the Asand Aftemperature are increased,and Msand Mftemperature are decreased after diameter expansion.In addition,transformation hysteresis temperature range of the alloy is increased from 40℃before diameter expansion to 70℃.
引文
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[12]刘丽华,陈九磅,周汉义,等.形变对铜基形状记忆合金相变滞后宽度的影响[J].合肥工业大学学报,2002,25(2):295-297.
[13]赵新清,王二敏,赵伟彪,等.塑性变形提高形状记忆合金相变滞后机制的探讨[J].航空材料学报,2000,20(2):8-14.
[14]BALO S N,CEYLAN M,AKSOY M.Effects of deformation on the microstructure of a Cu-Al-Be shape memory alloy[J].Materials Science and Engineering,2001,A311:151-156.
[15]李周.铜基形状记忆合金中的相变及其相关效应的研究[D].长沙:中南大学,2002.
[2]HUMBEECK J V.Non-medical applications of shape memory alloys[J].Materials Science and Engineering,1999,A273-275:134-148.
[3]李廷,王晓东,龚亚军,等.潜艇高压空气系统铁基形状记忆合金管接头研究[J].舰船科学技术,2004(S26):37-40.
[4]陈艳锋,陈忠伟,胡锐,等.Fe-Mn-Si基形状记忆合金在管接头方面的研究及应用[J].材料导报,2004,18(9):33-35.
[5]张瑾,谷南驹,王文水.矿用管接头Cu-Al-Mn记忆合金材料的研究[J].金属矿山,2001(7):39-40.
[6]黎沃光.热型连续铸造的原理及应用[J].铸造,1996(12):39-44.
[7]尹占华,黎沃光,余业球.热型连铸CuAlNi形状记忆合金丝的性能研究[J].材料工程,2004(5):26-29.
[8]蔡莲淑,余业球,黎沃光,等.柱状晶CuAlBe合金丝的性能[J].特种铸造及有色合金,2007,27(3):238-239.
[9]MONTECINOS S,MORON M O.Superelastic behavior and damping capacity of CuAlBe alloys[J].Materials Science and Engineering,2006,A419:91-97.
[10]GONZALEZ C H,DE ARAUJO C J,QUADROS N F.Study of martensitic stabilisation under stress in Cu-Al-Be shape memory alloy single crystal[J].Materials Science and Engineering,2004,A378:253-256.
[11]张瑾,谷南驹.变形对Cu-Al-Mn记忆合金相变滞后的影响[J].材料科学与工艺,2001,9(4):406-409.
[12]刘丽华,陈九磅,周汉义,等.形变对铜基形状记忆合金相变滞后宽度的影响[J].合肥工业大学学报,2002,25(2):295-297.
[13]赵新清,王二敏,赵伟彪,等.塑性变形提高形状记忆合金相变滞后机制的探讨[J].航空材料学报,2000,20(2):8-14.
[14]BALO S N,CEYLAN M,AKSOY M.Effects of deformation on the microstructure of a Cu-Al-Be shape memory alloy[J].Materials Science and Engineering,2001,A311:151-156.
[15]李周.铜基形状记忆合金中的相变及其相关效应的研究[D].长沙:中南大学,2002.