耐蚀性铬铜QCr1铬青铜 QCr1浇铸铜棒
Chromium bronze brand mainly QCr0.5, QCr0. 5-0. 2-0.1, QCr0. 6-0. 4-0. 05, etc., in the American ASTM standard chromium bronze brand is more, have C18150, C18200, C18400, C18500, etc. Contains chromium bronze is 0. 4% ~ 1.1% Cr (mass fraction, same below) of high copper Cu - Cr binary alloy phase diagram shown in figure 1-12. Under the eutectic temperature 1072 ℃, the maximum of chromium in copper solubility for 0. 65% (literature thought 0.68%). Solid solubility fell sharply with the decrease of temperature, and aging treatment after solid solution precipitation Cr phase particles. Chromium bronze hardening, aging or a cold deformation hardening, aging treatment for reinforcement. Chromium to join, on the one hand, obviously improve the alloy’s recrystallization temperature and heat intensity; On the other hand makes the conductivity of copper declined slightly. Solid solution treatment of chromium bronze bar conductivity is 450/0, issued after the aging treatment of up to 80% IACS. Ageing of chromium bronze softening temperature is 400 ℃, is cold work, twice of the copper. This alloy can be used in the casting state and deformation state. Al and Mg as chromium bronze
铬青铜的牌号主要有QCr0.5、QCr0. 5-0. 2-0.1、QCr0. 6-0. 4-0. 05等，美国ASTM标准中铬青铜的牌号较多，有C18150、C18200、C18400、C18500等。铬青铜是含0. 4%~1.1%Cr（质量分数，以下同）的高铜合金Cu-Cr二元相图见图1-12。在共晶温度1072℃下，铬在铜中的最大溶解度为0. 65%（有文献认为0.68%）。随温度的降低，固溶度急剧下降，固溶后时效处理析出Cr粒子相。铬青铜可以通过淬火•时效或淬火一冷变形，时效处理获得强化。铬的加入，一方面明显提高合金的再结晶温度和热强性；另一方面使铜的导电性略有下降。固溶处理的铬青铜棒导电率为450/0 IACS，时效处理后上升到80% IACS。时效态铬青铜的软化温度为400℃，是冷加工铜的两倍。这种合金可在铸造状态和变形状态下使用。Al及Mg作为铬青铜的合金元素添加时，可在Cu-Cr合金表面形成一层薄的、致密的与基体金属结合牢靠的氧化物膜，提高合金的高温抗氧化性能与耐热性，Al及Mg在合金中的含量通常各不大于0. 3%。Zr在铬青铜中可与Cr形成固溶于Cu的化合物Cr2 Zr，其溶解度随温度的降低而明显减少，使合金的强度、硬度、耐热性有所提高，同时对合金电导率的影响很小。因此铜一铬一锆合金为典型的高强高导铜合金。
产品名称：耐蚀性铬铜QCr1铬青铜 QCr1浇铸铜棒
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