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发明授权
CN107900129B 一种改善TA5-A钛合金宽幅中厚板材板型的加工方法 有权

一种改善TA5-A钛合金宽幅中厚板材板型的加工方法
摘要：
本发明公开了一种改善TA5‑A钛合金宽幅中厚板材板型的加工方法，该方法包括以下步骤：一、将TA5‑A钛合金板坯在大于相变点的温度下加热锻造，然后进行3火次热轧，再进行一次矫直；步骤二、将经一次矫直后的TA5‑A钛合金板坯依次进行热处理和二次矫直，得到不平度≤8mm/m的TA5‑A钛合金宽幅大规格中厚板材；所述TA5‑A钛合金宽幅中厚板材的尺寸(厚×宽×长)为(10mm～30mm)×(2000mm～2500mm)×(5000mm～7000mm)。本发明将高温大变形热轧和换向热轧相结合，合理分配轧制压下量和轧制道次，提高了轧制效率，减少了板坯的各向异性，从而改善了板坯轧制过程中的变形不均匀现象，有效降低了板坯的不平度，最终得到板型良好的TA5‑A钛合金宽幅中厚板材。
摘要（英）：

The invention discloses a machining method for improving a plate shape of a TA5-A titanium alloy wide medium-thickness plate. The method comprises the following steps: (1) a TA5-A titanium alloy plateblank is heated and forged at a temperature higher than a phase change point; then, the three-heating-number hot rolling is performed; and primary straightening is performed; (2) the TA5-A titanium alloy plate blank is heated and secondarily straightened in sequence after primary straightening to obtain a TA5-A titanium alloy wide and large medium-thickness plate with unevenness not more than 8 mm/m; and the size (thickness*width*length) of the TA5-A titanium alloy wide medium-thickness plate is (10-30 mm)*(2000-2500 mm)*(5000-7000 mm). The method combines high-temperature large deformation hot rolling with reversing hot rolling, reasonably distributes the rolling reduction and the rolling gates, improves the rolling efficiency, reduces the anisotropy of the plate blank, improves the nonuniform deformation phenomenon of the plate blank in the rolling process, effectively reduces the unevenness of the plate blank, and finally obtain the TA5-A titanium alloy wide medium-thickness platewith the excellent plate shape.

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