Method for inspecting low-magnification microstructure defects of titanium alloy raw materials

Abstract

The invention discloses a method for inspecting low-magnification structural defects of titanium alloy raw materials that can detect abnormal macrostructures of titanium alloy raw materials. The method can detect tissue genetic defects caused by abnormal forging deformation of titanium alloy raw materials after ingot casting. Cut a 20mm ± 3mm thick low-magnification tissue test piece from the titanium alloy raw material, first heat it in a heating furnace at 30-40°C below the β-transition temperature for 60 minutes, then raise the power to 15-20°C above the β-transition temperature, and the furnace temperature is uniform The stability requirement is within ±5°C, keep warm for 30 minutes and then air-cool, and then observe the low-magnification structure after corrosion. This method is suitable for the inspection of the low-magnification structure of α-type, α-β-type and near-β-type titanium alloy raw materials. The judgment of the macrostructure defects of titanium alloy raw materials is intuitive and clear, and it can control the production of forgings with titanium alloy raw materials with macrostructure defects. the resulting economic losses.

Description

technical field [0001] The invention relates to a method for inspecting metal macrostructure defects, in particular to a method for inspecting low-magnification structure defects of titanium alloy raw materials. Background technique [0002] Due to its high specific strength and excellent corrosion resistance, titanium alloys have been widely used in the fields of civil aviation and military aviation. Titanium alloy raw materials of various materials are used to forge frames, beam-bearing structural parts and core engine disks for aircraft. It has accounted for 20-40% of the total weight of the aircraft. In ensuring the safety of aircraft, the inspection and control of the macrostructure quality of titanium alloy raw materials is a key factor. [0003] At present, GB / T5168 is used to test the high and low magnification structure of two-phase titanium alloy raw materials in China. The defects that can be detected are pores, cracks, inclusions, delamination, and coarse grain ...

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Problems solved by technology

[0006] In order to overcome the deficiency that the existing conventional low-magnification corrosion method inspection cannot find the abnormal macrostructure of titanium alloy raw materials, the technical problem to be solved by the present invention is to provide a method for detecting low-magnification structural defects of titanium alloy raw materials that can find abnormal macrostructures of titanium alloy raw materials. method

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