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研究了一种新型高度β合金化的阻燃钛合金 Ti40的微观组织。研究表明 ,Ti40合金为单相β合金。其铸态组织中存在四叉晶界及晶界周围的白色区域 ,不超过 780℃固溶处理 ,使其晶粒粗大、晶界宽化 ,晶界仍由许多小晶粒组成 ;82 0℃固溶发生再结晶 ,110 0℃固溶发生二次再结晶 ,大晶粒中出现亚晶 ;95 0℃锻造 ,10 5 0℃固溶处理后其组织为 Si- O化合物和 Cr- O化合物组成的网状结构。不低于 910℃固溶时效处理 ,大晶粒中出现了许多亚晶 ,使合金的室温拉伸性能得到最佳匹配。
The microstructure of a new type of high-beta alloyed flame-retardant titanium alloy Ti40 was studied. Research shows that Ti40 alloy is single-phase β alloy. Its as-cast microstructure exists in the quadruple grain boundaries and the white areas around the grain boundaries, and does not exceed 780 ° C for solution treatment to make the grains coarse and the grain boundaries broaden. The grain boundaries are still composed of many small grains. 82 0 ℃ The solid solution recrystallizes, the secondary recrystallization takes place at 110 0 ℃, and the subgrains appear in the large grains. Forging at 95 0 ℃, the microstructure is composed of Si-O compound and Cr-O compound after solution treatment at 105 ℃ Composition of the mesh structure. Not less than 910 ℃ solution aging treatment, a large number of large grains appeared subgrain, the alloy tensile properties at room temperature to be the best match.