Improvement of strength and conductivity for Cu-Ti alloys aged in a hydrogen atmosphere

氢气氛中时效铜钛合金强度和电导率的提高

• 批准号: 23686104
• 负责人: SEMBOSHI Satoshi
• 金额: $ 6.74万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (A)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-11-18 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23686104/
• 关键词: 組織制御; 銅合金; 水素; 相変態; 時効析出; 力学特性; 電気伝導性; 構造評価; 導電率; 強度; 透過型電子顕微鏡; X線回折; 導電性材料; 抽出分離; 状態図

We attempted to prepare Cu-Ti based alloys with a high strength and a high electrical conductivity by hydrogenation procedures. The electrical conductivity of Cu-Ti alloys was significantly improved without degradation of the mechanical properties by aging in a hydrogen atmosphere. The strengthening was primarily due to fine dispersion of needle-shaped Cu4Ti precipitates, which was similar with the case of conventional aging in vacuum. The enhancement of the conductivity was due to a reduction of a concentration of solute Ti in the matrix phase, which was caused by co-precipitation of Cu4Ti and TiH2. The balance of the strength and conductivity was improved by aging under a higher hydrogen pressure at a low temperature. Prior-deformation before aging was also useful to improve the properties. Eventually, we demonstrated that optimizing the thermomechanical process conditions imparted an excellent balance of strength and conductivity, of more than 950 MPa and 25% IACS, respectively.

我们试图通过氢化程序制备具有高强度和高电导率的基于Cu-Ti的合金。 Cu-Ti合金的电导率得到了显着提高，而没有通过在氢气中老化机械性能的降解。加强主要是由于针状Cu4ti沉淀的精细分散，这与真空中常规衰老相似。电导率的提高是由于基质相位的溶质Ti浓度降低，这是由Cu4Ti和TiH2的共沉淀引起的。在低温下，在较高的氢压下衰老，强度和电导率的平衡得到了提高。衰老之前的事先转化也可用于改善特性。最终，我们证明了优化热力学过程的强度和电导率平衡，分别超过950 MPa和25％IACS。

项目成果

Cu-Ti合金に生ずるスピノーダル分解と時効析出のX線散乱法を用いた解析

X射线散射法分析Cu-Ti合金的旋节线分解和时效析出

• 发表时间: 2011
• 作者: 長谷川啓史;佐藤成男;高橋洋平;千星聡;我妻和明
• 通讯作者: 我妻和明

メゾスコピック組織制御分野

细观组织控制场

抽出分離法を利用したCu-Ti合金中時効析出物の構造・組成解析

萃取分离法分析铜钛合金中时效析出物的结构和成分

• 发表时间: 2012
• 作者: 千星聡;石黒三岐雄;佐藤成男;我妻和明;高維林;菅原章
• 通讯作者: 菅原章

時効析出型Cu-Ti合金における時効熱処理にともなうミクロ構造因子変化

时效沉淀型铜钛合金时效热处理显微组织因素的变化

• 发表时间: 2013
• 作者: 佐藤成男;長谷川啓史;千星聡;我妻和明
• 通讯作者: 我妻和明

時効析出型Cu-Ti合金中析出物の抽出分離

时效沉淀铜钛合金中沉淀物的提取和分离

• 发表时间: 2012
• 作者: 千星聡;石黒三岐雄;佐藤成男;我妻和明;高杉隆幸
• 通讯作者: 高杉隆幸