Rolling method of TC4 titanium alloy wide cut medium-thickness plates

Abstract

The invention provides a rolling method of TC4 titanium alloy wide cut medium-thickness plates. The rolling method includes the following steps: 1, first heating treatment is performed on TC4 titanium alloy plate blank with thickness ranging from 80mm to 150mm and length and width ranging from 800mm to 1200mm; 2, first rolling is performed on the TC4 titanium alloy plate blank to obtain semi-finished plate blank; 3, surface scale is removed after the semi-finished plate blank is sheared, and then second heating treatment is performed; and 4, second rolling is performed on the semi-finished plate blank to obtain TC4 titanium alloy wide cut medium-thickness plates with thickness ranging from 5mm to 30mm and width ranging from 1000mm to 2600mm. Through comprehensive control of rolling temperature, rolling heating number, heating number deformation and rolling directions, finally the TC4 titanium alloy wide cut medium-thickness plates with small anisotropism, high mechanical properties, strong plastic comprehensive matching are manufactured.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy material preparation, and in particular relates to a rolling method of TC4 titanium alloy wide medium-thick plate. Background technique [0002] With the development of technology in aerospace, shipbuilding, petroleum, chemical and nuclear energy industries, higher quality requirements are put forward for TC4 titanium alloy (the nominal composition is Ti-6Al-4V) medium and thick plates, such as the requirement of plate anisotropy Small, specifically, the difference between the transverse and longitudinal strengths of the mechanical properties at room temperature is less than 40MPa. [0003] Since the main α phase of the TC4 titanium alloy is a close-packed hexagonal structure, it is inevitable to produce a preferred crystal orientation during processing, and then form a texture. Only by comprehensively controlling the rolling process parameters such as heating temperature, deformation amou...

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Problems solved by technology

[0004] However, the current conventional methods fail to implement effective comprehensive control of the rolling process parameters, and the anisotropy of the final plate is large. Generally, the difference between the transverse and longitudinal strengths of the mechanical properties of titanium alloy medium and thick plates at room temperature can reach 70-100MPa

Therefore, the existing conventional rolling method can no longer meet the requirements of small anisotropy of titanium alloy medium and thick plates.

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