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发明公开
CN108893654A 一种全α相细晶高强韧耐蚀钛合金及其制备方法 无效 - 驳回

一种全α相细晶高强韧耐蚀钛合金及其制备方法
摘要：
本发明提供一种全α相细晶高强韧耐蚀钛合金及其制备方法，该全α相细晶高强韧耐蚀钛合金，包括Al 1.8～2.5％、Zr 5～50％和余量的Ti；所述全α相细晶高强韧耐蚀钛合金不含Pd。在本发明中，Zr与Ti易形成无限固溶体，锆元素易在腐蚀介质中形成锆的氧化物能有效改善钛合金的钝化膜的结构性能，显著提高钛合金的耐腐蚀性能，随合金中锆含量的增加，合金的钝化电流密度逐渐减小，合金由均匀腐蚀逐渐转变为局部腐蚀；同时，钛合金中加入Zr元素能显著改善钛合金的耐腐蚀性能钛合金中加入Zr后在表面形成的ZrO2能改善合金的氧化物保护膜层，从而提高合金抗腐蚀的能力。
摘要（英）：

The invention provides full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy and a method for preparing the same. The full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy comprises 1.8-2.5% of Al, 5-50% of Zr and the balance Ti. The full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy does not contain Pd. The full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy and the method have the advantages that infinite solid solution can be easily formed by the Zr and the Ti in the full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy, zirconium oxide can be easily formed by zirconium elements in corrosive media, accordingly, the structural performance of passive films of the full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy can be effectively improved, and the corrosion resistance of the full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy can be obviously enhanced; the density of passivation currents of the full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy can be gradually reduced along with increase of the content of the zirconium in the full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy, and accordingly the uniformly corroded full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy can be gradually turned to be locally corroded; the Zr elements are added into the full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy, and accordingly the corrosion resistance of the full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy can be obviously improved; oxide protective film layers of the full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy can be improved by ZrO2 formed on the surfaces of the full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy after the Zr is added into the full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy, and accordingly the corrosion resistance of the full-alpha-phase fine-grain high-toughness corrosion-resistant titanium alloy can be enhanced.

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