Ti－Code12合金焊后退火对组织性能的影响

Effect of Post-Welding Annealing on Microstructure and Properties of Ti-Code 12 Alloy

研究了Ｔｉ－Ｃｏｄｅ１２合金（Ｔｉ－０．３Ｍｏ－０．８Ｎｉ）焊后退火对组织和性能的影响．结果表明焊后退火将引起残存β相的共析分解，共析分解产物Ｔｉ２Ｎｉ相具有面心立方结构．合金的耐蚀性来源于α基体上Ｔｉ２Ｎｉ相的存在，Ｔｉ２Ｎｉ相既可在晶间沉淀，也能在晶内沉淀．本研究对Ｔｉ－Ｃｏｄｅ１２合金耐蚀性机理提出了直接证据．

Studies on the effect of post-welding annealing on the microstructure and properties of Ti-Code 12 alloy showed that the eutectoid decomposition of residual β-phase will take place during post-welding annealing. the Ti2Ni-phase products has a fcc stucture. The corrosion-resistance is arising from the precipitation of the Ti2Ni particles which can be found either intergranularly or inside the grains. The studies would provide direct evidence to the corrosion-resistant mechanism in Ti-Code 12 alloy.